CN105137337A - Method for determining power failure and power recovery of scheduling system line timely - Google Patents
Method for determining power failure and power recovery of scheduling system line timely Download PDFInfo
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- CN105137337A CN105137337A CN201510511216.9A CN201510511216A CN105137337A CN 105137337 A CN105137337 A CN 105137337A CN 201510511216 A CN201510511216 A CN 201510511216A CN 105137337 A CN105137337 A CN 105137337A
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a method for determining power failure and power recovery of a scheduling system line timely. The method comprises the following steps: presetting a power-on threshold and a wandering interval; monitoring a remote signal value of a breaker on the line; monitoring electrical parameter pairs of the line; and determining whether at least one electrical parameter pair before hopping of the remote signal value is corresponding to a level value before hopping of the remote signal value, and at least one electrical parameter pair before hopping of the remote signal value is corresponding to a level value after hopping of the remote signal value, and determining power failure or power recovery of the line according to the determination result. By synchronous determination of the remote signal value hopping information of the breaker on the line and the change situation of the electrical parameter pairs on the target line before and after hopping of the remote signal value, the method for determining power failure and power recovery of a scheduling system line timely estimates the power failure and power recovery situation of the line and then verifies the determination situation according to the changes of electrical parameter pairs on the line to make sure that determination of the power failure and power recovery situation of the target line is accurate.
Description
Technical field
The present invention relates to grid monitoring techniques field, particularly relate to a kind of method that timely judgement dispatching system breakage of circuit replies electricity by cable.
Background technology
In timely judgement dispatching system, circuit power-off can reflect the operation of power networks situation in a certain region, gives sufficient support to timely looking up the fault, fault analysis and fault isolation, can improve electric network data quality further.At present, each province, city and ground are adjusted and 220kV electric pressure line status are directly connect people's national grid corporation monitoring platform, but the line status of 110kV electric pressure is not directly accessed, therefore desirably adjust by the power-off of circuit and telegram in reply information initiatively on deliver to state's net.
Before the power-off of adjusting dispatching system automatically can report 110kV electric pressure circuit at present and telegram in reply information, yardman is needed to check data dispatching or phone contact electric power first-aid department scene is confirmed whether the power-off of actual generation circuit or phenomenon of sending a telegram in reply, occur if actual, yardman confirm after, dispatching system after status information is preserved again on deliver to State Grid Corporation of China.If circuit power-off or telegram in reply information do not occur reality, this information just belongs to dispatching system wrong report information, and scheduling reason can be ignored this information.In the process, if yardman does not confirm in time, the time delay sent can be caused, the promptness of data is affected, real-time analysis can not be carried out to a certain moment area power grid state, if human intervention does not deliberately confirm power-off or the telegram in reply information of actual generation simultaneously, the integrality of data is affected, cause power-off or telegram in reply information can not on deliver to State Grid Corporation of China.
Summary of the invention
Based on the technical matters that background technology exists, the present invention proposes a kind of method that timely judgement dispatching system breakage of circuit replies electricity by cable.
A kind of timely judgement dispatching system breakage of circuit that the present invention proposes replies the method for electricity by cable, comprises the following steps:
Preset power on threshold value and wandering interval;
The remote signalling value of isolating switch on Monitoring Line;
The electric parameter pair of Monitoring Line, each electric parameter forms by an electric parameter of circuit first end and an electric parameter of circuit second end;
When the remote signalling value saltus step of isolating switch, then by the electric parameter before the saltus step of remote signalling value to the saltus step of remote signalling value after electric parameter to comparing with power on threshold value and wandering interval respectively, judge whether that the electric parameter before having the saltus step of a remote signalling value at least is pair corresponding with the level value before the saltus step of remote signalling value, and have at least the electric parameter after the saltus step of a remote signalling value pair corresponding with the level value after the saltus step of remote signalling value, and judge circuit power-off or telegram in reply according to judged result.
Preferably, electric parameter can be the voltage at circuit two ends, electric current, meritorious and idle in one or more.
Preferably, each electric parameter forms the similar electric parameter by circuit two ends.
Preferably, electric parameter is to the electric current, meritorious and idle comprising circuit two ends.
Preferably, when the remote signalling value of isolating switch is low level from high level saltus step, then judge whether to have an electric parameter at least to being greater than the corresponding threshold value that powers on before the saltus step of remote signalling value, and have an electric parameter at least to being positioned at corresponding wandering interval after the saltus step of remote signalling value, if so, then circuit power-off is judged; If not, then the electric parameter pair of remote signalling value and circuit is again monitored;
When the remote signalling value of isolating switch is high level from low transition, then judge whether to have at least an electric parameter in remote signalling value saltus step anteposition in the wandering interval of correspondence, and have an electric parameter at least to being greater than the corresponding threshold value that powers on after the saltus step of remote signalling value, if so, then judge that circuit is sent a telegram in reply; If not, then the electric parameter pair of remote signalling value and circuit is again monitored.
Preferably, circuit two ends are respectively arranged with isolating switch, when being no less than the remote signalling value saltus step of an isolating switch, then judge the current level value of two isolating switch remote signalling values, if be no less than, isolating switch is current is in low level, then judge the remote signalling value of isolating switch from high level saltus step as low level; If the remote signalling value of two isolating switchs is all in high level, then judge the remote signalling value of isolating switch from low transition as high level.
Preferably, ekV, eA, eMW and eMVar is respectively, 3≤e≤7 with the voltage at circuit two ends, electric current, the meritorious and idle threshold value that powers on corresponding respectively.
Preferably, be [-a, a] with the voltage at circuit two ends, electric current, meritorious and idle wandering interval corresponding respectively, 0≤a≤1, and a and voltage, electric current, gain merit and idle corresponding standard unit is respectively 1kV, 1A, 1MW and 1MVar.
The present invention is by synchronously judging that the mode of the isolating switch remote signalling value saltus step information on circuit and the electric parameter situation of change before and after the saltus step of remote signalling value in target line judges the power-off telegram in reply situation of circuit.First isolating switch remote signalling value saltus step information is judged, electric situation is replied by cable to breakage of circuit and estimates, then by the change of the electric parameter of circuit, estimate of situation is verified, can guarantee to target line power-off telegram in reply situation judge accurate.
Replied by cable the method for electricity by timely judgement dispatching system breakage of circuit provided by the invention, can automatically realize judging circuit power-off and telegram in reply information in dispatching system in time, province's tune is first uploaded to the power-off judged or telegram in reply information programme automatically generated data file and uploads to state's tune again, avoid human intervention, be conducive to the promptness of guarantee data upload, correctness and integrality, providing strong guarantee to setting up sturdy power grid, being conducive to improving operation of power networks efficiency.And the present invention is suitable for the dispatching system of different manufacturers.
Accompanying drawing explanation
Fig. 1 is that a kind of timely judgement dispatching system breakage of circuit that the present invention proposes replies electric method flow diagram by cable.
Embodiment
With reference to Fig. 1, a kind of timely judgement dispatching system breakage of circuit that the present invention proposes replies the method for electricity by cable, comprises the following steps:
The first step, default power on threshold value and wandering interval.
The remote signalling value of isolating switch on second step, Monitoring Line.
The electric parameter pair of the 3rd step, Monitoring Line, each electric parameter forms by an electric parameter of circuit first end and an electric parameter of circuit second end.Electric parameter can be the voltage at circuit two ends, electric current, meritorious and idle in one or more, and each electric parameter has corresponding power on threshold value and a wandering interval.During concrete enforcement, replying the accuracy of electricity judgement in order to improve breakage of circuit by cable, can limit further: each electric parameter forms the similar electric parameter by circuit two ends.Such as, in present embodiment, electric parameter is to comprising the voltage at circuit two ends, electric current, meritorious and idle, 5kV, 5A, 5MW and 5MVar is respectively with the voltage at circuit two ends, electric current, the meritorious and idle threshold value that powers on corresponding respectively, the numerical value of the threshold value that powers on of visible voltage, electric current, meritorious and idle correspondence is 5, just according to data type, corresponding standard unit is different.During concrete enforcement, be respectively ekV, eA, eMW and eMVar, 3≤e≤7 with the voltage at circuit two ends, electric current, the meritorious and idle threshold value that powers on corresponding respectively.In like manner, be [-a, a] with the voltage at circuit two ends, electric current, meritorious and idle wandering interval corresponding respectively, 0≤a≤1, and a and voltage, electric current, gain merit and idle corresponding standard unit is respectively 1kV, 1A, 1MW and 1MVar; A value is not more than 1, can avoid, because a value is comparatively large, judging by accident the wandering value of electric parameter.
In present embodiment, voltage, electric current, meritoriously and idle all refer to absolute value, so wandering interval reality is [0, a].
4th step, remote signalling value saltus step when isolating switch, then by the electric parameter before the saltus step of remote signalling value to the saltus step of remote signalling value after electric parameter to comparing with power on threshold value and wandering interval respectively, judge whether that the electric parameter before having the saltus step of a remote signalling value at least is pair corresponding with the level value before the saltus step of remote signalling value, and have at least the electric parameter after the saltus step of a remote signalling value pair corresponding with the level value after the saltus step of remote signalling value, and judge circuit power-off or telegram in reply according to judged result.
On circuit isolating switch arrange this be exactly in order to detection line power-off send a telegram in reply situation, but be difficult to ensure that isolating switch does not break down all the time, so, while the remote signalling value of monitoring breaker, the also electric parameter at Monitoring Line two ends, infer further according to the power-off telegram in reply situation of electric parameter to circuit, be conducive to the accuracy ensureing breakage of circuit to be replied by cable to electricity judgement.In order to improve the accuracy of path monitoring, circuit generally arranges an isolating switch respectively at relative two ends, in online rood electricity situation, the remote signalling value of two isolating switchs all should be in high level, and the electric parameter on circuit should be greater than the threshold value that powers on; When circuit dead electricity, have at least the remote signalling value of an isolating switch to be in low level, and the electric parameter on circuit should be positioned at wandering interval.
In present embodiment, first the remote signalling value saltus step direction of isolating switch is judged according to the remote signalling value of two isolating switchs, and anticipation is carried out to the power-off telegram in reply state of circuit, to select to power on threshold value or wandering interval as reference standard according to anticipation result to the change of the electric parameter on circuit, judge that whether electric parameter change direction is consistent with remote signalling value saltus step direction.When obtaining the remote signalling value saltus step information of isolating switch, then judge the current level value of two isolating switch remote signalling values, if be no less than, isolating switch is current is in low level, then judge the remote signalling value of isolating switch from high level saltus step as low level; If the remote signalling value of two isolating switchs is all in high level, then judge the remote signalling value of isolating switch from low transition as high level.
Concrete, when the remote signalling value of isolating switch is low level from high level saltus step, then judge whether to have an electric parameter at least to being greater than the corresponding threshold value that powers on before the saltus step of remote signalling value, and have an electric parameter at least to being positioned at corresponding wandering interval after the saltus step of remote signalling value.
In present embodiment, by the voltage of circuit first end, electric current, meritoriously and idle be expressed as Ui, Ii, Pi and Qi, the voltage of circuit second end, electric current, meritoriously and idle be expressed as Uj, Ij, Pj and Qj.Then have an electric parameter at least to being greater than the corresponding threshold value that powers on before the saltus step of remote signalling value, and have an electric parameter at least to being positioned at corresponding wandering interval after the saltus step of remote signalling value, above condition can following mathematical expression represent:
Before the saltus step of remote signalling value: (Ii > 5 & Ij > 5) || (Pi > 5 & Pj > 5) || (Qi > 5 & Qj > 5)
After the saltus step of remote signalling value: (| Ii| < a & | Ij| < a) || (| Pi| < a & | Pj| < is a)
When remote signalling value is low level from high level saltus step, if before and after the saltus step of remote signalling value, the electric current on circuit, meritoriously, idle meet above two formula respectively, then judge circuit power-off; Be enough to two formula if discontented, then again monitor the electric parameter pair of remote signalling value and circuit.
In present embodiment, limit each electric parameter and form the similar electric parameter by circuit two ends, be the accuracy of replying electricity judgement in order to improve breakage of circuit by cable, when specifically implementing, above two parameters also can replace with:
Before the saltus step of remote signalling value: (Ii > 5||Pi > 5||Qi > 5) & (Ij > 5||Pj > 5||Qj > 5)
After the saltus step of remote signalling value: (| Ii| < a & | Pi| < a) || (| Ij| < a & | Pj| < is a)
Because voltage and current value have relevance, so, in present embodiment, voltage is not judged, to avoid redundant operation, reduce judging efficiency.In like manner, due in circuit dead electricity situation, idle data are meaningless, so when remote signalling value is low level, what do not judge on circuit is idle.
When the remote signalling value of isolating switch is high level from low transition, then judge whether to have at least an electric parameter in remote signalling value saltus step anteposition in the wandering interval of correspondence, and have an electric parameter at least to being greater than the corresponding threshold value that powers on after the saltus step of remote signalling value.Above condition can following mathematical expression represent:
Before the saltus step of remote signalling value: (| Ii| < a & | Ij| < a) || (| Pi| < a & | Pj| < is a)
After the saltus step of remote signalling value: (Ii > 5 & Ij > 5) || (Pi > 5 & Pj > 5) || (Qi > 5 & Qj > 5)
When remote signalling value is high level from low transition, if before and after the saltus step of remote signalling value, the electric current on circuit, meritoriously, idle meet above two formula respectively, then judge that circuit is sent a telegram in reply; If do not met, then again monitor the electric parameter pair of remote signalling value and circuit.During concrete enforcement, above two parameters also can replace with:
Before the saltus step of remote signalling value: (| Ii| < a & | Pi| < a) || (| Ij| < a & | Pj| < is a)
After the saltus step of remote signalling value: (Ii > 5||Pi > 5||Qi > 5) & (Ij > 5||Pj > 5||Qj > 5)
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (8)
1. judge that dispatching system breakage of circuit replies a method for electricity by cable, is characterized in that, comprises the following steps in time:
Preset power on threshold value and wandering interval;
The remote signalling value of isolating switch on Monitoring Line;
The electric parameter pair of Monitoring Line, each electric parameter forms by an electric parameter of circuit first end and an electric parameter of circuit second end;
When the remote signalling value generation saltus step of line-breaker, then by the electric parameter before the saltus step of remote signalling value to the saltus step of remote signalling value after electric parameter to comparing with power on threshold value and wandering interval respectively, judge whether that the electric parameter before having the saltus step of a remote signalling value at least is pair corresponding with the level value before the saltus step of remote signalling value, and have at least the electric parameter after the saltus step of a remote signalling value pair corresponding with the level value after the saltus step of remote signalling value, and judge circuit power-off or telegram in reply according to judged result.
2. as claimed in claim 1 judge that dispatching system breakage of circuit replies the method for electricity by cable, is characterized in that in time, electric parameter can be the voltage at circuit two ends, electric current, gain merit and idle in one or more.
3. the timely method that dispatching system breakage of circuit replies electricity by cable that judges as claimed in claim 2, it is characterized in that, each electric parameter forms the similar electric parameter by circuit two ends.
4. as claimed in claim 3 judge that dispatching system breakage of circuit replies the method for electricity by cable, is characterized in that in time, electric parameter to comprise circuit two ends electric current, to gain merit and idle.
5. the timely method that dispatching system breakage of circuit replies electricity by cable that judges as claimed in claim 1, it is characterized in that, when the remote signalling value of isolating switch is low level from high level saltus step, then judge whether to have an electric parameter at least to being greater than the corresponding threshold value that powers on before the saltus step of remote signalling value, and have an electric parameter at least to being positioned at corresponding wandering interval after the saltus step of remote signalling value, if so, then circuit power-off is judged; If not, then the electric parameter pair of remote signalling value and circuit is again monitored;
When the remote signalling value of isolating switch is high level from low transition, then judge whether to have at least an electric parameter in remote signalling value saltus step anteposition in the wandering interval of correspondence, and have an electric parameter at least to being greater than the corresponding threshold value that powers on after the saltus step of remote signalling value, if so, then judge that circuit is sent a telegram in reply; If not, then the electric parameter pair of remote signalling value and circuit is again monitored.
6. the timely method that dispatching system breakage of circuit replies electricity by cable that judges as claimed in claim 5, it is characterized in that, circuit two ends are respectively arranged with isolating switch, when being no less than the remote signalling value saltus step of an isolating switch, then judge the current level value of two isolating switch remote signalling values, if be no less than, isolating switch is current is in low level, then judge the remote signalling value of isolating switch from high level saltus step as low level; If the remote signalling value of two isolating switchs is all in high level, then judge the remote signalling value of isolating switch from low transition as high level.
7. as claimed in claim 5 judge that dispatching system breakage of circuit replies the method for electricity by cable, is characterized in that in time, with voltage, the electric current at circuit two ends, to gain merit and the idle threshold value that powers on corresponding is respectively respectively ekV, eA, eMW and eMVar, 3≤e≤7.
8. the timely method that dispatching system breakage of circuit replies electricity by cable that judges as claimed in claim 5, it is characterized in that, [-a is with the voltage at circuit two ends, electric current, meritorious and idle wandering interval corresponding respectively, a], 0≤a≤1, and a and voltage, electric current, meritorious and idle corresponding standard unit are respectively 1kV, 1A, 1MW and 1MVar.
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| CN201510511216.9A CN105137337B (en) | 2015-08-18 | 2015-08-18 | A kind of method for judging scheduling system line power-off telegram in reply in time |
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Cited By (1)
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| CN109767108A (en) * | 2018-12-31 | 2019-05-17 | 国网安徽省电力有限公司 | A kind of accurate analysis method of electric power dispatching system line status |
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