CN104865458A - Inversion device and method for detecting operation of island - Google Patents
Inversion device and method for detecting operation of island Download PDFInfo
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- CN104865458A CN104865458A CN201510039854.5A CN201510039854A CN104865458A CN 104865458 A CN104865458 A CN 104865458A CN 201510039854 A CN201510039854 A CN 201510039854A CN 104865458 A CN104865458 A CN 104865458A
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- 238000000034 method Methods 0.000 title abstract 2
- 238000001514 detection method Methods 0.000 claims description 18
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000004904 shortening Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 206010003497 Asphyxia Diseases 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1225—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to internal faults, e.g. shoot-through
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The present invention provides an inversion device and a method for detecting operation of an island. The inversion device comprises an inversion circuit and a control circuit, wherein the inversion circuit is connected in parallel with a power grid; the inversion circuit receives an DC input power supply, and converts the DC input power supply into an AC output voltage and an AC output current; the control circuit is coupled with the inversion circuit; the control circuit is used for controlling power supply conversion of the inversion circuit, wherein the control circuit generates disturbing signals at predetermined time intervals to disturb the AC output current generated by the inversion circuit, and detects whether the frequency of the AC output voltage is within a preset frequency range, so as to determine whether to start an island protection mechanism.
Description
Technical field
The invention relates to a kind of power converter topology, and relate to the detection method of a kind of inverter and island movement especially.
Background technology
In order to reduce the consumption rate of fossil energy, the application of the development renewable sources of energy that electric system is now positive.In existing application, namely the alternating-current system of parallel net type is the main trend of power system development now, the alternating-current system of described parallel net type can utilize the renewable source of energy generation such as solar electrical energy generation and wind-power electricity generation as small-sized decentralized power supply system, described decentralized power supply system can connect with electrical network, using common power supply and using to the load device of rear end.
But this type of alternating-current system is existing and inevasible problem is the phenomenon that decentralized power supply system can produce island movement often.More particularly, under this type of alternating-current system, electrical network can in power supply generation exception or when safeguarding, the connection between the inverter of disconnection and decentralized power supply system and the load device of rear end, thus is isolated from outside alternating-current system.Now, if inverter does not detect that electrical network is isolated from outside alternating-current system, and to power to load device separately constantly, then this phenomenon is generally referred to as island movement.When island movement, the power supply provided due to decentralized power supply system is relatively unstable, and load device so just may be caused to damage.
Summary of the invention
The invention provides the detection method of a kind of inverter and island movement, it accurately can detect whether inverter the situation of island movement occurs.
Inverter of the present invention comprises inverter circuit and control circuit.Inverter circuit and electrical network also connect, and wherein inverter circuit receives direct-current input power supplying, and direct-current input power supplying is converted to ac output voltage and ac output current.Control circuit couples inverter circuit; in order to control the Power convert of inverter circuit; wherein control circuit produces disturbing signal with prefixed time interval and carrys out the ac output current that disturbance inverter circuit produces; and whether the frequency detecting ac output voltage is positioned at predeterminated frequency scope, uses decision and whether enables island protect mechanism.
In an embodiment of the present invention, according to the point of zero voltage cycle of ac output voltage, control circuit judges whether the frequency of ac output voltage is positioned at predeterminated frequency scope.
In an embodiment of the present invention, the current cycle of ac output current is controlled by disturbing signal and changes; When electrical network normal operation and with inverter circuit and when connecing, the point of zero voltage cycle not affected by the variation of current cycle, and when electrical network occurs abnormal and when disconnecting with inverter circuit, the point of zero voltage cycle changes with the variation of current cycle.
In an embodiment of the present invention, inverter circuit reacts on the generation of disturbing signal and adjusts its Power convert behavior, uses and shortens or extend current cycle.
In an embodiment of the present invention, inverter circuit reacts on the generation of disturbing signal and stops Power convert, uses shortening current cycle.
In an embodiment of the present invention, control circuit comprises no-voltage detecting unit, frequency detecting unit, protected location and driving control unit.No-voltage detecting unit couples the output terminal of inverter circuit, in order to detect the no-voltage time point of ac output voltage.Frequency detecting unit couples no-voltage detecting unit, in order to the no-voltage time point calculating voltage crossing periods according to ac output voltage.Protected location couples frequency detecting unit, in order to judge whether the frequency of ac output voltage is positioned at predeterminated frequency scope according to the point of zero voltage cycle, and the frequency of ac output voltage is non-be positioned at predeterminated frequency scope time send guard signal.Driving control unit couples protected location, in order to enable island protect mechanism according to guard signal, uses the running controlling inverter circuit.
The detection method of island movement of the present invention is applicable to alternating-current system, and wherein alternating-current system comprises inverter and electrical network, inverter and electrical network connected with each other, detection method comprises the following steps: receive direct-current input power supplying by inverter; By inverter, direct-current input power supplying is converted to ac output voltage and ac output current; Produce disturbing signal with prefixed time interval and carry out the ac output current that disturbance inverter produces; Whether the frequency detecting ac output voltage is positioned at predeterminated frequency scope; And when the frequency of ac output voltage is non-be positioned at predeterminated frequency scope time, judge inverter generation island movement phenomenon.
In an embodiment of the present invention, detect the step whether frequency of ac output voltage be positioned at predeterminated frequency scope to comprise: the no-voltage time point detecting ac output voltage; According to the no-voltage time point calculating voltage crossing periods of ac output voltage; And judge whether the frequency of ac output voltage is positioned at predeterminated frequency scope according to the point of zero voltage cycle.
In an embodiment of the present invention, the step carrying out the ac output current that disturbance inverter produces with prefixed time interval generation disturbing signal comprises: make inverter circuit react on disturbing signal and adjust its Power convert behavior, uses and shortens or extend current cycle.
In an embodiment of the present invention, make inverter circuit react on disturbing signal and adjust its Power convert behavior, use the step shortening or extend current cycle and comprise: make inverter circuit react on disturbing signal and stop Power convert, use shortening current cycle.
In an embodiment of the present invention, the detection method of described island movement is further comprising the steps of: when judging inverter generation island movement phenomenon, enable island protect mechanism.
Based on above-mentioned, the embodiment of the present invention proposes the detection method of a kind of inverter and island movement.Described inverter is by periodically disturbance ac output current; detect mode that whether ac output voltage change thereupon again to judge whether inverter the situation of island movement occurs, use and accurately enable island protect mechanism immediately when island movement occurs to avoid the load device of rear end to be damaged.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.
Accompanying drawing explanation
Fig. 1 is the alternating-current system of one embodiment of the invention and the schematic diagram of inverter;
Fig. 2 is the flow chart of steps of the detection method of the island movement of one embodiment of the invention;
Fig. 3 is the function block schematic diagram of the control circuit of one embodiment of the invention;
Fig. 4 A is the voltage waveform view of the ac output voltage of one embodiment of the invention;
Fig. 4 B is the voltage waveform view of the ac output voltage of one embodiment of the invention.
Description of reference numerals:
10: alternating-current system;
100: inverter;
110: inverter circuit;
120: control circuit;
122: no-voltage detecting unit;
124: frequency detecting unit;
126: protected location;
128: driving control unit;
DCin: direct-current input power supplying;
EG: electrical network;
I
aC: ac output current;
LD: load device;
Pz, p1, p1 ': the point of zero voltage cycle;
S210 ~ S260: step;
Sc: control signal;
Sd: disturbing signal;
Sp: guard signal;
Tz, t2, td: no-voltage time point;
T0, t1: time point;
V
aC: ac output voltage;
WF1, WF2: voltage waveform.
Embodiment
In order to make content of the present invention more easily understand, below especially exemplified by embodiment as example of the present invention.In addition, all possibility parts, use the element/component/step of identical label, represent identical or like in drawings and the embodiments.
Fig. 1 is the alternating-current system of one embodiment of the invention and the schematic diagram of inverter.Please refer to Fig. 1, the inverter 100 of the present embodiment can be applicable in alternating-current system 10.In the alternating-current system 10 of the present embodiment, the input end of inverter 100 couples photovoltaic module (photovoltaic module, not shown), the direct supply generation device (such as renewable source of energy generation assembly) such as wind-power electricity generation assembly or hydropower assembly, and the output terminal of inverter 100 and electrical network EG connect.Wherein, inverter 100 is a decentralized power supply system with the renewable source of energy generation component visual of front end.In FIG, though only illustrate that a decentralized power supply system is example, the present invention is not limited only to this.In actual applications, alternating-current system 10 also can include the multiple and decentralized power supply system connect.
Inverter 100 can receive direct-current input power supplying DCin from the photovoltaic module of front end, and received direct-current input power supplying DCin is converted to ac output voltage V
aCwith ac output current I
aC.Specifically, inverter 100 comprises inverter circuit 110 and control circuit 120.Inverter circuit 110 receives direct-current input power supplying DCin, and in order to direct-current input power supplying is converted to ac output voltage V
aCwith ac output current I
aC.Wherein, the circuit configurations of described inverter circuit 110 can be such as half-bridge asymmetric, half-bridge symmetrical expression, full-bridge type or other feasible inverter circuit configurations, and the present invention is not limited this.
Control circuit 120 couples inverter circuit 110, in order to control the Power convert of inverter circuit 110, described control signal Sc can be such as a pulse-width signal (PWM signal) of the switching cycle in order to control inverter circuit 110, but the present invention is not as limit.
In the alternating-current system 10 of the present embodiment, inverter 100 is a decentralized power supply system with the renewable source of energy generation component visual of front end, it is in parallel with electrical network EG and/or other decentralized power supply system (not shown), to use to load device LD jointly to power.Wherein, can detect that in order to make inverter 100 situation of island movement occurs exactly, and then perform corresponding island protect mechanism, the ac output current I that inverter 100 can be exported by periodically disturbance
aC, then detect ac output voltage V
aCmode, with according to ac output voltage V
aCchange judge whether occur island movement.Concrete island movement detection method as shown in Figure 2.Wherein, Fig. 2 is the flow chart of steps of the detection method of the island movement of one embodiment of the invention.
Referring to Fig. 1 and Fig. 2, in the present embodiment, first, inverter circuit 110 can receive direct-current input power supplying DCin (step S210), then direct-current input power supplying DCin is converted to ac output voltage V
aCwith ac output current I
aC(step S220).Then, control circuit 120 can produce disturbing signal with a prefixed time interval and adjust control signal Sc, uses the ac output current I that disturbance inverter circuit 110 produces
aC(step S230), and the further ac output voltage V detecting inverter circuit 110 and export
aCfrequency whether be positioned at predeterminated frequency scope (step S240).
When control circuit 120 detects ac output voltage V
aCfrequency when being still positioned at predeterminated frequency scope, represent now ac output voltage V
aCstill be subject to the voltage institute strangulation of electrical network EG, and not because the disturbance occurrence frequency of induced current changes, therefore control circuit 120 can judge that inverter 100 is current island movement (step S250) not occur, and namely electrical network EG now should be in the state of normal operation and connect with inverter circuit 110.
On the contrary, when control circuit 120 detects ac output voltage V
aCfrequency exceeded predeterminated frequency scope outer time, represent now ac output voltage V
aCnot by the voltage institute strangulation of electrical network EG, but be subject to the disturbance occurrence frequency change of electric current, therefore control circuit 120 can judge that island movement (step S260) occurs inverter 100, and namely electrical network EG has now been isolated in outside alternating-current system 10.
After detecting whether inverter 100 situation of island movement occurs, control circuit 120 can determine whether enable the running that island protect mechanism controls inverter circuit 110 according to this, thus avoids the load device LD of rear end to damage.For example, inverter circuit 110 can comprise protection electric post (Relay) (not shown).When control circuit 120 judges island movement occurs and enables island protect mechanism; control circuit 120 meeting trigger protection electricity post; use and make inverter 100 de-connect (such as: load device LD) with other parts of alternating-current system 10, use and avoid the situation of island movement to continue to occur.
Specifically, control circuit 120 can such as at every 40 ac output voltage V
aCproduce 4 disturbing signals (be not limited only to this, can according to deviser's demand from Row sum-equal matrix) in cycle and carry out the control signal Sc that disturbance exports, make inverter circuit 110 react on control signal Sc and make produced ac output current I
aCcurrent cycle change thereupon.More particularly, inverter circuit 110 can react on the generation of disturbing signal and adjust its Power convert behavior, uses and shortens or extend ac output current I
aCcurrent cycle.Such as: inverter circuit 110 can react on the generation of disturbing signal and stop Power convert, use and make ac output current I
aCcurrent cycle be shortened.
When electrical network EG normal operation and with inverter circuit 110 and when connecing (that is, when there is not island movement), ac output voltage V
aCthe point of zero voltage cycle can the voltage clamping that exports by electrical network EG in specific frequency (being such as 60Hz), and ac output current I can not be subject to
aCthe variation of current cycle affected.Otherwise, when electrical network EG occurs abnormal and when disconnecting with inverter circuit 110, ac output voltage V
aCthe point of zero voltage cycle and then can change along with the variation of current cycle because of the strangulation lacking line voltage.
By this characteristic, control circuit 120 can utilize and detect ac output voltage V
aCthe point of zero voltage cycle judge ac output voltage V
aCfrequency whether be positioned at predeterminated frequency scope, use and judge whether inverter 100 island movement occurs exactly.
Below with the ac output voltage V shown by concrete framework example illustrated in fig. 3 and Fig. 4 A and Fig. 4 B
aCvoltage waveform illustrate how control circuit 120 realizes above-mentioned island movement testing mechanism.Wherein, Fig. 3 is the function block schematic diagram of the control circuit of one embodiment of the invention.Fig. 4 A is the voltage waveform view of the ac output voltage of one embodiment of the invention.Fig. 4 B is the voltage waveform view of the ac output voltage of one embodiment of the invention.
Referring to Fig. 3 and Fig. 4 A, in the present embodiment, control circuit 120 comprises no-voltage detecting unit 122, frequency detecting unit 124, protected location 126 and driving control unit 128.No-voltage detecting unit 122 couples the output terminal of inverter circuit 110, in order to detect ac output voltage V
aCno-voltage time point tz.Wherein, no-voltage time point tz is such as no-voltage time point t2 and the td in Fig. 4 A and Fig. 4 B.
Frequency detecting unit 124 couples no-voltage detecting unit 122, in order to foundation ac output voltage V
aCno-voltage time point tz calculating voltage crossing periods pz.Wherein point of zero voltage period p z is such as point of zero voltage period p 1 in Fig. 4 A and Fig. 4 B and p1 '.
Protected location 126 couples the point of zero voltage period p z that frequency detecting unit 124 calculates with receive frequency detecting unit 124.In the present embodiment, protected location 126 can judge whether point of zero voltage period p z is positioned at predeterminated frequency scope, then sends guard signal Sp to driving control unit 128 according to the result judged.Wherein, when protected location 126 judges ac output voltage V according to received point of zero voltage period p z
aCfrequency be positioned at predeterminated frequency scope outer time, driving control unit 128 can adjust its control signal Sc exported according to guard signal Sp, uses and enables island protect mechanism.
With regard to the controlling behavior of control circuit 120 entirety, first, driving control unit 128 is not when producing disturbing signal Sd, and driving control unit 128 can produce control signal Sc and normally operate to control inverter circuit.Now, the ac output voltage V that produces of inverter circuit 110
aCsubstantially the voltage waveform that the point of zero voltage cycle is p1 can be had.
When reaching prefixed time interval, driving control unit 128 can produce disturbing signal Sd with disturbance control signal Sc.Wherein, inverter circuit 110 can react on the control signal Sc that is disturbed and stop Power convert during no-voltage time point td-t2.If now there is not the situation of island movement, refer to Fig. 4 A, although then ac output current I
aC0A is set at no-voltage time point td, but due to ac output voltage V
aCwaveform by the strangulation of line voltage institute, ac output voltage V can be made
aCvoltage waveform WF1 in during no-voltage time point td-t2 is maintained original string waveshape, changes gradually from negative voltage towards no-voltage.In this case, no-voltage detecting unit 122 can detect ac output voltage V
aCno-voltage time point be t2, use that to make frequency detecting unit 124 calculate the point of zero voltage cycle be according to this p1.Therefore, protected location 126 can judge ac output voltage V according to point of zero voltage period p 1
aCfrequency be positioned at predeterminated frequency scope, make driving control unit 128 not enable island protect mechanism.
On the other hand, if now the situation of island movement occurs inverter 100, Fig. 4 B is referred to, then ac output voltage V
aCdecommission (the ac output current I of inverter circuit 110 at no-voltage time point td-t2 can be reacted on
aCbe set to 0A), and present magnitude of voltage is pulled down to no-voltage instantaneously voltage waveform WF2 at no-voltage time point td.In this case, no-voltage detecting unit 122 can detect ac output voltage V
aCno-voltage time point be td, use and make frequency detecting unit 124 calculate point of zero voltage period p 1 ' according to this.Therefore, protected location 126 can judge ac output voltage V according to point of zero voltage period p 1 '
aCfrequency be positioned at outside predeterminated frequency scope, make driving control unit 128 react on guard signal Sp and enable island protect mechanism.
In sum, the embodiment of the present invention proposes the detection method of a kind of inverter and island movement.Described inverter is by periodically disturbance ac output current; detect mode that whether ac output voltage change thereupon again to judge whether inverter the situation of island movement occurs, use and accurately enable island protect mechanism immediately when island movement occurs to avoid the load device of rear end to be damaged.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (12)
1. an inverter, is characterized in that, comprising:
Inverter circuit, connects with electrical network, and wherein this inverter circuit receives direct-current input power supplying, and this direct-current input power supplying is converted to ac output voltage and ac output current; And
Control circuit; couple this inverter circuit; in order to control the Power convert of this inverter circuit; wherein this control circuit produces disturbing signal with prefixed time interval and carrys out this ac output current that this inverter circuit of disturbance produces; and whether the frequency detecting this ac output voltage is positioned at predeterminated frequency scope, uses decision and whether enables island protect mechanism.
2. inverter according to claim 1, is characterized in that, according to the point of zero voltage cycle of this ac output voltage, this control circuit judges whether the frequency of this ac output voltage is positioned at this predeterminated frequency scope.
3. inverter according to claim 2, is characterized in that, the current cycle of this ac output current is controlled by this disturbing signal and changes; When this electrical network normal operation and with this inverter circuit and when connecing, this point of zero voltage cycle not affected by the variation of this current cycle, and when this electrical network occurs abnormal and when disconnecting with this inverter circuit, this point of zero voltage cycle changes with the variation of this current cycle.
4. inverter according to claim 3, is characterized in that, this inverter circuit reacts on the generation of this disturbing signal and adjusts its Power convert behavior, uses and shortens or extend this current cycle.
5. inverter according to claim 4, is characterized in that, this inverter circuit reacts on the generation of this disturbing signal and stops Power convert, uses and shortens this current cycle.
6. inverter according to claim 1, is characterized in that, this control circuit comprises:
No-voltage detecting unit, couples the output terminal of this inverter circuit, in order to detect the no-voltage time point of this ac output voltage;
Frequency detecting unit, couples this no-voltage detecting unit, in order to the no-voltage time point calculating voltage crossing periods according to this ac output voltage;
Protected location, couple this frequency detecting unit, in order to judge whether the frequency of this ac output voltage is positioned at this predeterminated frequency scope according to this point of zero voltage cycle, and the frequency of this ac output voltage is non-be positioned at this predeterminated frequency scope time send guard signal; And
Driving control unit, couples this protected location, in order to enable this island protect mechanism according to this guard signal, uses the running controlling this inverter circuit.
7. a detection method for island movement, is applicable to alternating-current system, it is characterized in that, this alternating-current system comprises inverter and electrical network, this inverter and this electrical network connected with each other, this detection method comprises:
Direct-current input power supplying is received by this inverter;
By this inverter, this direct-current input power supplying is converted to ac output voltage and ac output current;
Produce disturbing signal with prefixed time interval and carry out this ac output current that this inverter of disturbance produces;
Whether the frequency detecting this ac output voltage is positioned at predeterminated frequency scope; And
When the frequency of this ac output voltage is non-be positioned at this predeterminated frequency scope time, judge this inverter generation island movement phenomenon.
8. the detection method of island movement according to claim 7, is characterized in that, the step whether frequency detecting this ac output voltage is positioned at this predeterminated frequency scope comprises:
Detect the no-voltage time point of this ac output voltage;
According to the no-voltage time point calculating voltage crossing periods of this ac output voltage; And
Judge whether the frequency of this ac output voltage is positioned at this predeterminated frequency scope according to this point of zero voltage cycle.
9. the detection method of island movement according to claim 8, is characterized in that, the current cycle of this ac output current is controlled by this disturbing signal and changes; When this electrical network normal operation and with this inverter circuit and when connecing, this point of zero voltage cycle not affected by the variation of this current cycle, and when this electrical network occurs abnormal and when disconnecting with this inverter circuit, this point of zero voltage cycle changes with the variation of this current cycle.
10. the detection method of island movement according to claim 9, is characterized in that, produces the step that this disturbing signal carrys out this ac output current that this inverter of disturbance produces comprise with this prefixed time interval:
Make this inverter circuit react on this disturbing signal and adjust its Power convert behavior, use and shorten or extend this current cycle.
The detection method of 11. island movements according to claim 10, is characterized in that, makes this inverter circuit react on this disturbing signal and adjusts its Power convert behavior, uses the step shortening or extend this current cycle and comprises:
Make this inverter circuit react on this disturbing signal and stop Power convert, use and shorten this current cycle.
The detection method of 12. island movements according to claim 1, is characterized in that, also comprise: when judging that this island movement phenomenon occurs this inverter, enable island protect mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/630,648 US20150244251A1 (en) | 2014-02-26 | 2015-02-25 | Inverting apparatus and detection method of islanding operation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201461944587P | 2014-02-26 | 2014-02-26 | |
| US61/944,587 | 2014-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104865458A true CN104865458A (en) | 2015-08-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850325A (en) * | 2018-08-01 | 2020-02-28 | 株式会社捷太格特 | Power supply monitoring device and power supply monitoring method |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6536346B2 (en) * | 2015-10-19 | 2019-07-03 | 住友電気工業株式会社 | Power converter and control method thereof |
| TWI551021B (en) * | 2015-11-25 | 2016-09-21 | 財團法人金屬工業研究發展中心 | Flyback power converter and control method thereof |
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| CN106353614B (en) * | 2016-08-29 | 2020-01-21 | 许继集团有限公司 | Island detection method and device for direct current system |
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| CN106921146B (en) * | 2017-03-20 | 2019-09-13 | 特变电工西安电气科技有限公司 | A kind of the switching overvoltage protective device and method of multilevel photovoltaic grid-connected inverter |
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| CN107171289A (en) * | 2017-06-06 | 2017-09-15 | 江西科技学院 | A kind of protection circuit |
| KR101957575B1 (en) | 2017-06-23 | 2019-03-13 | 인투코어테크놀로지 주식회사 | Power supply supporting device and method of supporting power supply to load |
| JP6930370B2 (en) | 2017-10-30 | 2021-09-01 | オムロン株式会社 | Ground fault detector |
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| CN108270239A (en) * | 2018-01-30 | 2018-07-10 | 国网上海市电力公司 | A kind of distribution network electric energy quality disturbing source direction determining method containing distributed generation resource |
| JP7235032B2 (en) * | 2018-02-15 | 2023-03-08 | 日本電産株式会社 | Power converters, drives and power steering devices |
| FR3083394B1 (en) * | 2018-06-29 | 2021-03-19 | Valeo Equip Electr Moteur | POWER COMPONENT PROTECTION DEVICE FOR A TRANSISTOR BRIDGE |
| CN111256345B (en) * | 2018-11-30 | 2021-05-07 | 杭州先途电子有限公司 | Photovoltaic air conditioner control method, controller and photovoltaic air conditioner |
| TWI703423B (en) | 2019-06-19 | 2020-09-01 | 群光電能科技股份有限公司 | Power supply device and a power supply method |
| CN113012981A (en) * | 2019-12-20 | 2021-06-22 | 施耐德电气工业公司 | Contactor, control device and control method thereof |
| TWI822561B (en) * | 2023-01-17 | 2023-11-11 | 固緯電子實業股份有限公司 | Device to improve current limiting response speed and waveform |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6172889B1 (en) * | 1996-05-29 | 2001-01-09 | Sharp Kabushiki Kaisha | Inverter apparatus islanding operation detecting method and inverter apparatus capable of surely detecting an islanding operation with a simple construction |
| US6646898B2 (en) * | 2001-07-02 | 2003-11-11 | Honda Giken Kogyo Kabushiki Kaisha | Resonant inverter apparatus |
| US20050057950A1 (en) * | 2003-09-11 | 2005-03-17 | Colby Roy Stephen | Power regulator for power inverter |
| US7945413B2 (en) * | 2007-09-04 | 2011-05-17 | Solarbridge Technologies, Inc. | Voltage-sensed system and method for anti-islanding protection of grid-connected inverters |
| US20130039106A1 (en) * | 2011-01-15 | 2013-02-14 | Converteam Technology Ltd. | Controllers for Static Energy Supply Units |
| TW201339790A (en) * | 2012-03-22 | 2013-10-01 | 聯昌電子企業股份有限公司 | Photovoltaic system having power-increment-aided incremental-conductance maximum power point tracking controller using constant-frequency variable-duty control and method thereof |
Family Cites Families (81)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5327335A (en) * | 1992-09-28 | 1994-07-05 | Sundstrand Corporation | Harmonic feedback control for an inverter |
| CN2189792Y (en) * | 1994-04-28 | 1995-02-15 | 巫忆陵 | High and low voltage relay with backlash |
| US6038142A (en) * | 1998-06-10 | 2000-03-14 | Lucent Technologies, Inc. | Full-bridge isolated Current Fed converter with active clamp |
| JP2002233045A (en) * | 2001-02-02 | 2002-08-16 | Canon Inc | Ground detecting device for photovoltaic power generation system and method |
| JP2002252986A (en) * | 2001-02-26 | 2002-09-06 | Canon Inc | Inverter, power supply system and method for reducing leakage current in power supply system |
| JP2002367768A (en) * | 2001-06-04 | 2002-12-20 | Matsushita Electric Ind Co Ltd | Power source for driving magnetron |
| JP2003098215A (en) * | 2001-09-26 | 2003-04-03 | Canon Inc | Earth detection method and device in power conversion system |
| TW548886B (en) * | 2001-10-16 | 2003-08-21 | Know Entpr Co Ltd U | Three-phase shunt type active power filter capable of operating in parallel |
| DE10156963A1 (en) * | 2001-11-20 | 2003-06-05 | Fritz Frey | Circuit arrangement for the reliable switching of circuits |
| WO2003058799A1 (en) * | 2002-01-08 | 2003-07-17 | Sanken Electric Co., Ltd. | Power factor improving converter and control method thereof |
| US7492620B2 (en) * | 2002-11-29 | 2009-02-17 | Rohm Co., Ltd. | DC-AC converter and controller IC thereof |
| US20070137688A1 (en) * | 2003-11-10 | 2007-06-21 | Tokyo Denki University | Photovoltaic power generator |
| TWI232361B (en) * | 2003-11-25 | 2005-05-11 | Delta Electronics Inc | Maximum-power tracking method and device of solar power generation system |
| US8134352B2 (en) * | 2003-12-22 | 2012-03-13 | Koninklijke Philips Electronics N.V. | Switched mode power supply including power supply units and controller |
| TWI296457B (en) * | 2006-01-18 | 2008-05-01 | Univ Yuan Ze | High-performance power conditioner for solar photovoltaic system |
| TWI296460B (en) * | 2006-01-18 | 2008-05-01 | Univ Yuan Ze | High-performance power conditioner for clean energy with low input voltage |
| WO2007100328A1 (en) * | 2006-03-02 | 2007-09-07 | Semiconductor Components Industries, Llc | Method for regulating a voltage and circuit therefor |
| TWI320626B (en) * | 2006-09-12 | 2010-02-11 | Ablerex Electronics Co Ltd | Bidirectional active power conditioner |
| TW200818671A (en) * | 2006-10-05 | 2008-04-16 | Holtek Semiconductor Inc | Direct-current (DC) power switching device |
| US7495410B2 (en) * | 2007-01-30 | 2009-02-24 | Rockwell Automation Technologies, Inc. | Systems and methods for improved motor drive power factor control |
| KR101194833B1 (en) * | 2007-08-03 | 2012-10-25 | 페어차일드코리아반도체 주식회사 | Inverter driver device and lamp driver device thereof |
| ATE492066T1 (en) * | 2007-09-05 | 2011-01-15 | Abb Oy | ONE PHASE TO THREE PHASE CONVERTER |
| US7986539B2 (en) * | 2007-09-26 | 2011-07-26 | Enphase Energy, Inc. | Method and apparatus for maximum power point tracking in power conversion based on dual feedback loops and power ripples |
| US7768242B2 (en) * | 2007-10-01 | 2010-08-03 | Silicon Laboratories Inc. | DC/DC boost converter with resistorless current sensing |
| US8796884B2 (en) * | 2008-12-20 | 2014-08-05 | Solarbridge Technologies, Inc. | Energy conversion systems with power control |
| WO2010071855A2 (en) * | 2008-12-20 | 2010-06-24 | Azuray Technologies, Inc. | Energy conversion systems with power control |
| US20100157632A1 (en) * | 2008-12-20 | 2010-06-24 | Azuray Technologies, Inc. | Energy Conversion Systems With Power Control |
| US8598741B2 (en) * | 2008-12-23 | 2013-12-03 | Samsung Electro-Mechanics Co, Ltd. | Photovoltaic and fuel cell hybrid generation system using single converter and single inverter, and method of controlling the same |
| US20100220500A1 (en) * | 2009-01-29 | 2010-09-02 | Fuji Electric Systems Co., Ltd. | Power converter and method for controlling power converter |
| CN201438776U (en) * | 2009-04-16 | 2010-04-14 | 永磁电子（东莞）有限公司 | High-frequency generator circuit of electrodeless lamp |
| CN201392462Y (en) * | 2009-04-22 | 2010-01-27 | 陈国真 | Energy-saving switch device |
| CN101552572B (en) * | 2009-05-18 | 2011-01-05 | 浙江大学 | Parallel inverter current control method adopting voltage differential compensation |
| WO2011010388A1 (en) * | 2009-07-24 | 2011-01-27 | Ｎｅｃディスプレイソリューションズ株式会社 | Switching power source and electronic device using the same |
| JP4913849B2 (en) * | 2009-07-29 | 2012-04-11 | 山洋電気株式会社 | System-linked inverter device and control method thereof |
| US20110044083A1 (en) * | 2009-08-20 | 2011-02-24 | Christopher Thompson | Adaptive Photovoltaic Inverter |
| TWI393333B (en) * | 2009-09-22 | 2013-04-11 | Richpower Microelectronics | Controller chip and protection method for a power converter |
| TWM380576U (en) * | 2009-11-02 | 2010-05-11 | Ampower Technology Co Ltd | Photovoltaic module and power supply system using the same |
| CN101728957B (en) * | 2009-11-24 | 2011-09-28 | 华东交通大学 | Method for reducing no-load loss of inverter with two-stage structure |
| CN102118018B (en) * | 2009-12-31 | 2015-07-08 | 天津市松正电动汽车技术股份有限公司 | Protection circuit with functions of upper limit and lower limit |
| US8362732B2 (en) * | 2010-02-02 | 2013-01-29 | GM Global Technology Operations LLC | Motor phase winding fault detection method and apparatus |
| CN102148584B (en) * | 2010-02-10 | 2013-04-17 | 上海英孚特电子技术有限公司 | Compensation method of direct current (DC) voltage fluctuation of photovoltaic grid-connected inverter |
| AU2011218467A1 (en) * | 2010-02-22 | 2012-08-30 | Petra Solar Inc. | Method and system for controlling resonant converters used in solar inverters |
| KR101090263B1 (en) * | 2010-03-08 | 2011-12-07 | 헥스파워시스템(주) | Ground fault detection device and method with direct current wire for system of photovoltaic power generation |
| JP5045772B2 (en) * | 2010-03-11 | 2012-10-10 | オムロン株式会社 | Capacitor capacity missing detection method in power conditioner, power conditioner for implementing the same, and photovoltaic power generation system including the same |
| KR101089906B1 (en) * | 2010-04-02 | 2011-12-05 | 성균관대학교산학협력단 | Maximum power point tracker, power conversion controller, power inverter of insulating structure, and method for maximum power point tracking of power inverter |
| WO2011163437A2 (en) * | 2010-06-25 | 2011-12-29 | Massachusetts Institute Of Technology | Power processing methods and apparatus for photovoltaic systems |
| CN101950976B (en) * | 2010-08-25 | 2012-11-28 | 常熟开关制造有限公司(原常熟开关厂） | Grid-connected operation method of grid-connected type photovoltaic inverter |
| CN101950985B (en) * | 2010-11-01 | 2013-07-03 | 上海兆能电力电子技术有限公司 | Method for suppressing output harmonic wave and direct current component of single-phase grid-combined photovoltaic inverter |
| TWM408678U (en) * | 2010-11-16 | 2011-08-01 | Allis Electric Co Ltd | Photovoltaic powered system |
| US8531123B2 (en) * | 2010-12-20 | 2013-09-10 | O2Micro, Inc. | DC/DC converter with multiple outputs |
| CN102025291A (en) * | 2010-12-20 | 2011-04-20 | 东南大学 | Photovoltaic assembly with MPPT (Maximum Power Point Tracking) module |
| CN102118028B (en) * | 2011-01-27 | 2013-01-23 | 华中科技大学 | Method for suppressing and controlling current harmonics of three-phase LCL (Lower Control Limit) type grid-connected inverter |
| CN102130610B (en) * | 2011-01-31 | 2013-02-27 | 天津大学 | Method for controlling constant-voltage discharging of energy storage system of flywheel |
| JP2012173773A (en) * | 2011-02-17 | 2012-09-10 | Toshiba Corp | Power conversion device |
| TW201250429A (en) * | 2011-06-15 | 2012-12-16 | Solarrich Applied Energy & Technology Co Ltd | Method for optimizing output power of solar cell |
| CN102223100A (en) * | 2011-06-17 | 2011-10-19 | 北京中能清源科技有限公司 | Control method of three-phase grid-connected inverter based on modified proportional resonant regulator |
| CN102244497B (en) * | 2011-07-08 | 2013-05-08 | 大禹电气科技股份有限公司 | Frequency conversion control method and device |
| CN102904273B (en) * | 2011-07-29 | 2015-05-20 | 通用电气公司 | Maximum power point tracking (MPPT) control of energy conversion system and relevant method |
| TWI444807B (en) * | 2011-08-23 | 2014-07-11 | Univ Nat Cheng Kung | Analog control apparatus of inverter |
| CN102307007B (en) * | 2011-09-13 | 2013-11-06 | 矽力杰半导体技术(杭州)有限公司 | PFC (power factor correction) control circuit based on master-slave interlaced critical conduction mode and control method thereof |
| CN202372616U (en) * | 2011-11-25 | 2012-08-08 | 比亚迪股份有限公司 | Signal fault detection circuit |
| TWI481146B (en) * | 2011-12-02 | 2015-04-11 | Darfon Electronics Corp | Off-grid solar inverter system without a battery and control method thereof |
| TWM426948U (en) * | 2011-12-09 | 2012-04-11 | Topper Sun Energy Technology | Improvement of solar power generation system inverter |
| US9653923B2 (en) * | 2011-12-12 | 2017-05-16 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Resonant power management architectures |
| US9143056B2 (en) * | 2011-12-16 | 2015-09-22 | Empower Micro Systems, Inc. | Stacked voltage source inverter with separate DC sources |
| CN102496960A (en) * | 2011-12-24 | 2012-06-13 | 朱建国 | Photovoltaic grid-connected inverter and method for reducing working loss of photovoltaic grid-connected inverter |
| CN102611341B (en) * | 2012-03-12 | 2014-07-30 | 深圳市英威腾电气股份有限公司 | Photovoltaic inverter and method for tracking maximum power of same |
| CN102611141A (en) * | 2012-03-30 | 2012-07-25 | 南京大学 | MPPT (maximum power point tracking) control device and method of photovoltaic inverter based on perturbation method |
| TW201349724A (en) * | 2012-05-25 | 2013-12-01 | Delta Electronics Inc | Power converter and method for controlling the same |
| CN202872384U (en) * | 2012-07-24 | 2013-04-10 | 华南理工大学 | Three-ring control device of single-stage photovoltaic grid-connected inversion system |
| CN102882401A (en) * | 2012-09-19 | 2013-01-16 | 华为技术有限公司 | Inverter with wide voltage input range and input-stage circuit thereof |
| CN102880223A (en) * | 2012-09-27 | 2013-01-16 | 易霸科技(威海)股份有限公司 | Analog circuit implementation method for MPPT (maximum power point tracking) of low-power photovoltaic inverter system |
| CN202880967U (en) * | 2012-10-19 | 2013-04-17 | 深圳市天源新能源有限公司 | Photovoltaic seawater desalination system and photovoltaic seawater desalination inverter |
| CN202888934U (en) * | 2012-11-13 | 2013-04-17 | 国家电网公司 | Soft start circuit and charger |
| CN203135741U (en) * | 2013-01-05 | 2013-08-14 | 苏州泽众新能源科技有限公司 | Multifunctional power converter |
| TWI466403B (en) * | 2013-01-30 | 2014-12-21 | Chicony Power Tech Co Ltd | Solar energy conversion apparatus |
| CN203243242U (en) * | 2013-03-19 | 2013-10-16 | 广东工业大学 | Single-phase photovoltaic grid-connected inverter |
| CN103337901B (en) * | 2013-06-28 | 2016-03-30 | 华为技术有限公司 | The method of uninterrupted power supply and uninterrupted power supply |
| CN203387430U (en) * | 2013-07-25 | 2014-01-08 | 天津大学 | Micro photovoltaic grid connected inverter for optimization of direct current bus capacitor |
| CN103501555B (en) * | 2013-09-25 | 2015-02-18 | 电子科技大学 | Digital phase locking and frequency tracking electromagnetic induction heating power controller |
| CN103558496B (en) * | 2013-11-14 | 2016-08-17 | 阳光电源股份有限公司 | A kind of one pole earthed system and failure detector, method |
-
2015
- 2015-01-22 CN CN201510031553.8A patent/CN104868764B/en active Active
- 2015-01-23 CN CN201510034255.4A patent/CN104868770B/en active Active
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- 2015-02-16 CN CN201510083338.2A patent/CN104917413B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6172889B1 (en) * | 1996-05-29 | 2001-01-09 | Sharp Kabushiki Kaisha | Inverter apparatus islanding operation detecting method and inverter apparatus capable of surely detecting an islanding operation with a simple construction |
| US6646898B2 (en) * | 2001-07-02 | 2003-11-11 | Honda Giken Kogyo Kabushiki Kaisha | Resonant inverter apparatus |
| US20050057950A1 (en) * | 2003-09-11 | 2005-03-17 | Colby Roy Stephen | Power regulator for power inverter |
| US7945413B2 (en) * | 2007-09-04 | 2011-05-17 | Solarbridge Technologies, Inc. | Voltage-sensed system and method for anti-islanding protection of grid-connected inverters |
| US20130039106A1 (en) * | 2011-01-15 | 2013-02-14 | Converteam Technology Ltd. | Controllers for Static Energy Supply Units |
| TW201339790A (en) * | 2012-03-22 | 2013-10-01 | 聯昌電子企業股份有限公司 | Photovoltaic system having power-increment-aided incremental-conductance maximum power point tracking controller using constant-frequency variable-duty control and method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850325A (en) * | 2018-08-01 | 2020-02-28 | 株式会社捷太格特 | Power supply monitoring device and power supply monitoring method |
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