CN101699306B - Method for monitoring current acquisition circuit of electric power secondary system - Google Patents
Method for monitoring current acquisition circuit of electric power secondary system Download PDFInfo
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- CN101699306B CN101699306B CN2009103097794A CN200910309779A CN101699306B CN 101699306 B CN101699306 B CN 101699306B CN 2009103097794 A CN2009103097794 A CN 2009103097794A CN 200910309779 A CN200910309779 A CN 200910309779A CN 101699306 B CN101699306 B CN 101699306B
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Abstract
The invention relates to a method for monitoring the state of a current acquisition circuit of an electric power secondary system. The method adopts a state monitoring center to collect electrical quantities acquired by a relay protective device so as to judge the abnormities of the current acquisition circuit and position the abnormities of a secondary circuit of certain single-phase current by combining the judgment and abnormity alarm signals of a TA circuit. The method accurately reflects the condition of the current acquisition circuit, realizes the circuit state monitoring, greatly reduces the workload of overhaul and fault removal, reduces the power-cut time for overhauling equipment, and improves the working efficiency.
Description
Technical field
The present invention relates to the electric power secondary system Condition Monitoring Technology, be specifically related to a kind of method for monitoring current acquisition circuit of electric power secondary system.
Background technology
System of relay protection is made up of each link such as closing loop of ac circuit, DC loop, protective relaying device itself, isolating switch.In the stage that preventative maintenance is still adopted in the maintenance of relay protection now, run duration adopts the prophylactic repair pattern.Prophylactic repair has played really in guaranteeing the equipment operate as normal and has directly prevented or the effect of delay fault; But it is this not according to the actual state of equipment; The simple maintenance at interval in required time; Unavoidably can produce superfluous maintenance, not only cause loss and the human and material resources of equipment operational use time, the waste of financial resources, even can cause maintenance failure.Optimal pattern is a repair based on condition of component; Condition responsive with equipment is the basis, through continuity observation and comprehensive other factors to equipment, the existing occurent or potential performance degradation phenomenon of identification equipment; Equipment state is made reasonable assessment, confirm the best maintenance of equipment opportunity.Repair based on condition of component must be based upon on the basis that equipment state is effectively monitored.
The AC sampling loop of protective relaying device is extremely important, directly affects the action behavior of protection, realize repair based on condition of component, must carry out effective on-line monitoring to current acquisition circuit.Development along with software and hardware technology; Platform technology is progressively used in the manufacturing and designing of relay protection; Make the application category of protecting suitably to be extended in the loop beyond the device and go that this on-line monitoring for expansion protection system associated loop provides maybe.
For the supervision of current return, mainly in protective relaying device, when the protective relaying device sampling does not have residual voltage zero sequence and negative-sequence current are arranged at present through detecting, it is unusual to judge the TA loop, device alarm locking corresponding protection.But this mode has just realized the unusual back of secondary circuit alarm function, and unusual location is accurate inadequately, investigates the current acquisition circuit that need check electric current secondary loop and protective relaying device in the interval when unusual, and workload is big.
Summary of the invention
The purpose of this invention is to provide a kind of method for monitoring current acquisition circuit of electric power secondary system; To judge whether current acquisition circuit exists unusually; And accurately locate abnormity point and be positioned at the wiring of device external circuit and still install inner acquisition circuit; For the inner acquisition circuit of device, further be positioned to concrete a certain phase.
For realizing above-mentioned purpose, the technical scheme of employing is: a kind of method for monitoring current acquisition circuit of electric power secondary system may further comprise the steps:
(1) protective relaying device is sampled with electric parameters such as three-phase currents with three-phase current, measurement to protection;
Whether unusual, circulate to condition monitoring center transmission sampled data, execution in step (3) according to fixed frequency when the TA loop is no abnormal according to institute's electric parameters of gathering if (2) detecting the TA loop; Locking corresponding protection when the TA loop is unusual, and send TA loop abnormal alarm signal, execution in step (4) to the condition monitoring center immediately;
(3) same the protection constantly electric current and the absolute value of measuring with the difference of electric current gathered of each phase calculated at the condition monitoring center respectively; If the absolute value of the difference of being calculated exists greater than the situation of setting preset value, promptly send corresponding current acquisition circuit abnormal alarm signal;
(4) according to TA loop abnormal alarm signal and current acquisition circuit abnormal alarm signal, with the Acquisition Circuit that accurately is positioned to a certain phase on wiring of protective device external circuit or the protective device unusually.Method is: if TA loop abnormal alarm signal is arranged, then be the outside secondary connection loop fault of protective relaying device; If no TA loop abnormal alarm signal; Further judge each mutually protection with electric current and measurement with the absolute value of the difference of electric current whether greater than preset value; If a certain protection mutually with electric current with measurement with the difference of electric current greater than preset value, then be that this phase current acquisition circuit of protective relaying device is unusual.
Protection is sent to condition monitoring center with current sampling data with telemetry intelligence (TELINT) with measuring with electric current, and TA loop abnormal alarm signal is sent to the condition monitoring center with the mode of remote signalling information.
The protective relaying device end detects the TA loop in real time according to the collection electric parameters, and whether unusual determination methods is: calculate residual voltage, zero-sequence current and negative-sequence current in real time; When satisfying in continuous a period of time when zero sequence and negative-sequence current being arranged when not having residual voltage, it is unusual to alarm the TA loop.
The electric parameters that the present invention adopts the condition monitoring center to collect the protective relaying device collection is carried out current acquisition circuit and is judged unusually; And combine TA loop abnormal alarm signal to carry out the unusual location of secondary circuit of a certain phase current with this criterion; The situation that has accurately reflected current acquisition circuit has realized the loop state monitoring, has significantly reduced the workload that maintenance is fixed a breakdown; The maintenance power off time of reduction equipment has improved work efficiency.
Description of drawings
Fig. 1 is a method for monitoring current acquisition circuit of electric power secondary system process flow diagram of the present invention.
Embodiment
The current acquisition circuit monitoring system that adopts in the present embodiment is made up of protective relaying device, condition monitoring center.Protective relaying device can be gathered protection and use current value with current value with measuring; And each phase current collection value reached the condition monitoring center; Judge comprehensively at the condition monitoring center whether whole current acquisition circuit exists unusually, if having unusually, the current acquisition circuit of locating a certain phase is unusual.
The interchange acquisition circuit of protective relaying device itself possesses self-checking function, and with self check direct information condition monitoring center, the Rule of judgment when this testing result conduct is located unusually.Exchange acquisition circuit and comprise current acquisition circuit and voltage acquisition circuit.
As shown in Figure 1, method for monitoring current acquisition circuit of electric power secondary system specifically may further comprise the steps in the present embodiment:
(1) protective relaying device carries out real-time sampling with three-phase current, measurement with electric parameters such as three-phase currents to protection;
(2) whether the protective relaying device end to detect the TA loop in real time according to the collection electric parameters unusual; Determination methods is: calculate residual voltage, zero-sequence current and negative-sequence current in real time; When satisfying in continuous a period of time when zero sequence and negative-sequence current being arranged when not having residual voltage, it is unusual to alarm the TA loop; Send sampled data, execution in step (3) according to the fixed frequency circulation to the condition monitoring center when TA loop is no abnormal; Locking corresponding protection when the TA loop is unusual, and TA loop abnormal alarm signal is delivered to the condition monitoring center with the mode of remote signalling information, execution in step (4) immediately;
(3) same the protection constantly electric current and the absolute value of measuring with the difference of electric current gathered of each phase calculated at the condition monitoring center respectively; If the absolute value of the difference of being calculated exists greater than the situation of setting preset value, promptly send corresponding current acquisition circuit abnormal alarm signal;
(4) according to TA loop abnormal alarm signal and current acquisition circuit abnormal alarm signal; Locate the Acquisition Circuit that unusual circuit is an a certain phase on wiring of protective device external circuit or the protective device; For the latter; Can accurately be positioned to a certain current acquisition circuit and the protective current acquisition circuit measured mutually, realize navigating to unusually the acquisition circuit of a certain phase.Method is: if TA loop abnormal alarm signal is arranged, then be the outside secondary connection loop fault of protective relaying device, please the wiring of operation maintenance personnel inspection current return whether have problems such as phase sequence mistake, broken string.If no TA loop abnormal alarm signal; Further judge each mutually protection with electric current and measurement with the absolute value of the difference of electric current whether greater than preset value; If a certain protection mutually with electric current with measurement with the difference of electric current greater than preset value; Then be that this phase current acquisition circuit of protective relaying device is unusual, whether this cross streams input that please operation maintenance personnel inspection protective relaying device, filtering, sampling maintenance, AD etc. are intact, and whether the analog quantity channel coefficient of verifying attachment is suitable.
Protection is sent to condition monitoring center with current sampling data with telemetry intelligence (TELINT) with measuring with electric current, and TA loop abnormal alarm signal is sent to the condition monitoring center with the mode of remote signalling information.
For the unattended operation transformer station of remote districts, the condition monitoring center can be in the distance, and each tunnels analogy value that protective relaying device collects and detection information adopt the telemechanical stipulations to deliver to the relay protection condition monitoring center in a distant place, realize remote condition monitoring.
Claims (2)
1. a method for monitoring current acquisition circuit of electric power secondary system is characterized in that, this method step is following:
The protective relaying device end is sampled with the three-phase current electric parameters with three-phase current, measurement to protection;
Whether unusual, circulate to condition monitoring center transmission sampled data, execution in step (3) according to fixed frequency when the TA loop is no abnormal according to institute's electric parameters of gathering if detecting the TA loop; Locking corresponding protection when the TA loop is unusual, and send TA loop abnormal alarm signal, execution in step (4) to the condition monitoring center immediately;
The condition monitoring center is calculated the same of each phase respectively and is gathered protection constantly with electric current and the absolute value of measuring with the difference of electric current, if the absolute value of the difference of being calculated promptly sends corresponding current acquisition circuit abnormal alarm signal greater than setting preset value;
According to TA loop abnormal alarm signal and current acquisition circuit abnormal alarm signal, unusual circuit is positioned;
The method of the unusual circuit in location is in the said step (4): if TA loop abnormal alarm signal is arranged, then be the outside secondary connection loop fault of protective relaying device; If no TA loop abnormal alarm signal; Whether further judgement respectively protects the absolute value of the difference of using electric current and measurement to use electric current greater than preset value mutually; Greater than preset value, then is that this phase current acquisition circuit of protective relaying device is unusual as if a certain difference of using electric current with electric current and measurement of protecting mutually; The protective relaying device end detects the TA loop in real time according to the collection electric parameters, and whether unusual determination methods is: calculate residual voltage, zero-sequence current and negative-sequence current in real time; Do not have residual voltage and when zero sequence and negative-sequence current are arranged when satisfying in continuous a period of time, it is unusual to alarm the TA loop.
2. method for monitoring current acquisition circuit of electric power secondary system as claimed in claim 1; It is characterized in that; Protection is delivered to condition monitoring center with current sampling data with the telemetry intelligence (TELINT) mode with measuring with electric current, and TA loop abnormal alarm signal is sent to the condition monitoring center with the mode of remote signalling information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009103097794A CN101699306B (en) | 2009-11-16 | 2009-11-16 | Method for monitoring current acquisition circuit of electric power secondary system |
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| CN2009103097794A CN101699306B (en) | 2009-11-16 | 2009-11-16 | Method for monitoring current acquisition circuit of electric power secondary system |
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| CN101699306A CN101699306A (en) | 2010-04-28 |
| CN101699306B true CN101699306B (en) | 2012-07-04 |
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| CN2009103097794A Expired - Fee Related CN101699306B (en) | 2009-11-16 | 2009-11-16 | Method for monitoring current acquisition circuit of electric power secondary system |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684145B (en) * | 2012-04-28 | 2014-04-23 | 辽宁省电力有限公司朝阳供电公司 | Sampling data exception detecting method and relay protection method based on redundant CT windings |
| CN102830264B (en) * | 2012-09-04 | 2015-05-13 | 国电南瑞科技股份有限公司 | Sampling value switching method applicable to safe stable control device under intelligent substation environment |
| CN103118097A (en) * | 2013-01-25 | 2013-05-22 | 电子科技大学 | Data transmission method in wireless sensor network |
| CN105044554A (en) * | 2015-06-30 | 2015-11-11 | 安徽博诺思信息科技有限公司 | Power grid fault detection and diagnosis method |
| CN105049282A (en) * | 2015-07-07 | 2015-11-11 | 中国南方电网有限责任公司 | Intelligent relay protection device control overhauling method based on on-line monitoring information |
| CN105807162A (en) * | 2016-03-25 | 2016-07-27 | 神华集团有限责任公司 | Action monitoring circuit for secondary circuits in electrical system and terminal strip |
| CN108845225B (en) * | 2018-06-28 | 2020-11-06 | 云南电网有限责任公司昆明供电局 | Method for analyzing wiring correctness of secondary current loop of power capacitor and reactor |
| CN110658377B (en) * | 2019-10-23 | 2021-11-09 | 国网山西省电力公司阳泉供电公司 | Voltage secondary opening triangular loop monitoring device |
| CN110927436A (en) * | 2019-11-05 | 2020-03-27 | 成都智达电力自动控制有限公司 | Current channel sampling abnormity detection method of transformer substation relay protection device |
| CN110988515A (en) * | 2019-11-06 | 2020-04-10 | 汪祺航 | Voltage channel sampling abnormity detection method of transformer substation relay protection device |
| CN112415435B (en) * | 2020-10-29 | 2024-01-19 | 云南电网有限责任公司 | Detection method for secondary loop of parallel reactor protection device |
| CN112415436A (en) * | 2020-10-29 | 2021-02-26 | 云南电网有限责任公司 | Secondary loop detection method of line protection device |
| CN114825646A (en) * | 2022-06-29 | 2022-07-29 | 四川明星电力股份有限公司 | Remote monitoring system and method for protection current of transformer substation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251569A (en) * | 2008-04-01 | 2008-08-27 | 山东电力研究院 | Method for testing electric secondary AC loop |
| CN101286635A (en) * | 2007-04-11 | 2008-10-15 | 黄沛昕 | Synthetic monitoring method and device in medium-voltage power supply system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101286635A (en) * | 2007-04-11 | 2008-10-15 | 黄沛昕 | Synthetic monitoring method and device in medium-voltage power supply system |
| CN101251569A (en) * | 2008-04-01 | 2008-08-27 | 山东电力研究院 | Method for testing electric secondary AC loop |
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