CN104898018A - Automatic pull trial detection and control device for single-phase earth fault of power distribution network - Google Patents

Automatic pull trial detection and control device for single-phase earth fault of power distribution network Download PDF

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Publication number
CN104898018A
CN104898018A CN201510224940.3A CN201510224940A CN104898018A CN 104898018 A CN104898018 A CN 104898018A CN 201510224940 A CN201510224940 A CN 201510224940A CN 104898018 A CN104898018 A CN 104898018A
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China
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module
bus
signal
fault
acquisition module
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CN201510224940.3A
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CN104898018B (en
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刘仲
董丽金
丁志强
苏磊
许小兵
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State Grid Corp of China SGCC
Wuxi Power Supply Co of Jiangsu Electric Power Co
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State Grid Corp of China SGCC
Wuxi Power Supply Co of Jiangsu Electric Power Co
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    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

Abstract

The invention provides an automatic pull trial detection and control device for a single-phase earth fault of a power distribution network. The device comprises a telemetry acquisition module, a remote signal acquisition module, a fault signal acquisition module, a logic judgment module, a policy control module and a policy execution module, which are connected with a central processing unit; when a bus has a single-phase earth fault, the fault signal acquisition module receives a signal, the central processing unit judges the fault, and the telemetry acquisition module and the remote signal acquisition module automatically acquire a voltage value of the monitored bus, an action signal of an arc suppression coil and a single-phase earth signal of the bus, and compare the data with the criteria set by the logic judgment module, to determine the property of the fault; the policy control module makes a control policy, and the policy execution module forms a remote control operation sequence according to the control policy, and pushes the remote control operation sequence to an automatic grid scheduling system for executing via a communication interface. The device adopting a technical support system for judging can be more accurate, and can shorten the fault line searching time, reduce the probability of misoperation and improve the fault processing efficiency.

Description

One-phase earthing failure in electric distribution network tries to draw Detection & Controling device automatically
Technical field
The present invention relates to a kind of one-phase earthing failure in electric distribution network automatically to try to draw Detection & Controling device, belong to power system automatic field.
Background technology
China's power distribution network based on through grounding through arc mode, after there is singlephase earth fault, due to cannot short-circuit loop be formed, fault current is less, grid line voltage symmetry is sustainable power supply still, but needs to draw Timeliness coverage and isolated fault point by circuit examination in time, and recovers power transmission as early as possible.
Whether existing faulty line arrange distinguish method is issued an order by yardman to carry out manually trying to draw, and recovered by artificial judgment voltage, determines fault coverage with this.Not high according to present practice yardman artificial treatment single-line ground fault efficiency.Because each operation of yardman all needs through flow processs such as operation, monitoring, an operation of issuing an order probably needs 2 minutes, if run into the situation that circuit on bus is more, the time of looking up the fault circuit can be longer, and need to carry out artificial judgment, comparatively large to the dependence of personnel's technical capability, there is unsafe factors such as drawing road order is unreasonable, manual operation error, signal misjudgment.
At present in field of distribution network, how quick and precisely localizing faults section, realize faulty line and automatically accurately judge, be the long-term difficult problem paid close attention to both at home and abroad.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of one-phase earthing failure in electric distribution network is provided automatically to try to draw Detection & Controling device, by this device handling failure, all carry out judgement by technology support system to process, can be more accurate, and greatly shorten yardman's looking up the fault wire time, reduce maloperation probability, improve fault handling efficiency.
According to technical scheme provided by the invention, described one-phase earthing failure in electric distribution network tries to draw Detection & Controling device automatically, comprise the telemetry-acquisition module, state-signal collection module, Collection module, logic judgment module, strategic control module, the policy enforcement module that are connected with central processing unit, described telemetry-acquisition module, state-signal collection module, Collection module and policy enforcement module are connected to information interactive bus by communication interface, then are connected to automation system for the power network dispatching;
The phase voltage value of described telemetry-acquisition module, each substation bus bar of state-signal collection module Real-Time Monitoring, arc suppression coil actuating signal, bus single-phase earthing signal; When bus generation singlephase earth fault, Collection module receives signal, central processing unit starts breakdown judge, bus voltage value, arc suppression coil actuating signal, the bus single-phase earthing signal of being monitored by telemetry-acquisition module, state-signal collection module automatic acquisition, and compare with the criterion that logic judgment module sets, to determine nature of trouble; Provide control strategy by strategic control module according to bus networks topology situation, policy enforcement module forms straighforward operation sequence according to control strategy, pushes to automation system for the power network dispatching perform by communication interface.
When monitoring bus three-phase voltage value wherein one is less than 10% of phase voltage mutually, other two phase voltages are greater than 80% of line voltage, and arc suppression coil actuating signal transmits, busbar grounding signal transmits, when above condition meets simultaneously, described logic judgment module judges bus generation earth fault, starts strategic control module.
Described strategic control module will draw road order to send to policy enforcement module to form straighforward operation sequence, be tried one by one to draw, find out ground path by automation system for the power network dispatching.
Advantage of the present invention is: apparatus structure is simple, is convenient to install; Device and automation system for the power network dispatching separate, only need by communication interface interactive information; Device action pattern is flexible, and all kinds of logic criterion, strategy can be self-defined, (20kV, 10kV power distribution network) applied widely.This device decreases manual intervention, realizes full-automatic intelligent, significantly increases work efficiency and power supply reliability.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is apparatus function principle flow chart.
Fig. 3 is the judgement schematic diagram of logic judgment module.
Fig. 4 is the fault scenes schematic diagram in embodiment.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes: the telemetry-acquisition module 2 be connected with central processing unit 1, state-signal collection module 3, Collection module 4, logic judgment module 5, strategic control module 6, policy enforcement module 7, described telemetry-acquisition module 2, state-signal collection module 3, Collection module 4 and policy enforcement module 7 are connected to information interactive bus by communication interface, then are connected to automation system for the power network dispatching (EMS).
Under normal operation, the magnitude of voltage (as 10kV bus A, B, C three-phase voltage) of telemetry-acquisition module 2, state-signal collection module 3 Real-Time Monitoring each transformer station designated components (10kV bus), arc suppression coil actuating signal, bus single-phase earthing signal.When bus generation singlephase earth fault, a phase voltage reduction is close to 0, and other two-phases raise as line voltage, and arc suppression coil motion compensation capacitance current, in automation system for the power network dispatching, " bus single-phase earthing " signal transmits.After ground path switch pulls open, ground connection disappears, and voltage is normal again, " bus single-phase earthing " signal return.When bus generation singlephase earth fault, after Collection module 4 receives " bus single-phase earthing " signal, central processing unit 1 starts breakdown judge, bus voltage value, arc suppression coil actuating signal, the bus single-phase earthing signal of being monitored by telemetry-acquisition module 2, state-signal collection module 3 automatic acquisition, and compare with the criterion that logic judgment module 5 sets, to determine the nature of trouble of bus single-phase earthing.Provide control strategy by strategic control module 6 according to bus networks topology situation, policy enforcement module 7 forms straighforward operation sequence according to control strategy, pushes to automation system for the power network dispatching perform by communication interface.
As shown in Figure 2, each substation bus bar voltage of this device real time monitoring and signal, analyzed by electrical wiring, judges whether singlephase earth fault occurs.Device sends a signal to yardman and carries out manual confirmation, after yardman confirms fault, return mechanism carries out fault handling, strategic control module 6 will draw road order to send to policy enforcement module 7 to try one by one to draw (finally being performed by automation system for the power network dispatching), find out ground path.
As shown in Figure 3, the Logic judgment principle of this device is: when (1) monitoring bus three-phase voltage value wherein one be less than mutually phase voltage 10%, other two phase voltages are greater than 80% of line voltage, (2) arc suppression coil actuating signal transmits, (3) busbar grounding signal transmits, when above condition meets simultaneously, logic judgment module 5 judges bus generation earth fault, starts strategic control module 6.
Establish totally 4, A station 10kV circuit in embodiment, draw road order to be 111,112,113,114.As shown in Figure 4, show main transformer high side switch 301 and main transformer low-side switch 101 in figure, horizontal line represents 10kV bus in wiring.
When after generation singlephase earth fault, this device monitoring A stand 10kV bus three-phase voltage value wherein B phase be less than phase voltage 10%, other two-phase A, C phase voltage be greater than 80% of line voltage, arc suppression coil actuating signal, busbar grounding signal.Logic judgment module 5 is judged as singlephase earth fault, sends to yardman to carry out manual confirmation, after yardman's manual confirmation, sends confirmation to strategic control module 6, and device tries to draw according to drawing road order 111,112,113,114 one by one.First pull open 111 switches, because 111 circuits are not earth fault line, busbar voltage does not change, and ground signalling still transmits, and device failure judgement circuit is not 111, then 111 switches that close.Device pulls open 112 switches again, and after pulling open 112 switches, bus voltage resume is normal, and three-phase voltage balances, and ground signalling involution, then device judges that earth fault line is 112, and 112 circuits are fed back to yardman, then 112 switches that close, and fault handling completes.
Automatically try to draw Detection & Controling device by one-phase earthing failure in electric distribution network of the present invention, faulty line examination is drawn and is risen to " full-automatic intelligent " by current " manual remote control analytic type ", this device is by technical support means such as computer technologies, faulty line, fast isolated fault point, Rapid Implementation breakdown repair, fast quick-recovery customer power supply can be judged fast, significantly improve power supply reliability.

Claims (3)

1. one-phase earthing failure in electric distribution network tries to draw Detection & Controling device automatically, it is characterized in that, comprise the telemetry-acquisition module (2), state-signal collection module (3), Collection module (4), logic judgment module (5), strategic control module (6), the policy enforcement module (7) that are connected with central processing unit (1), described telemetry-acquisition module (2), state-signal collection module (3), Collection module (4) and policy enforcement module (7) are connected to information interactive bus by communication interface, then are connected to automation system for the power network dispatching;
Described telemetry-acquisition module (2), the phase voltage value of each substation bus bar of state-signal collection module (3) Real-Time Monitoring, arc suppression coil actuating signal, bus single-phase earthing signal; When bus generation singlephase earth fault, Collection module (4) receives signal, central processing unit (1) starts breakdown judge, bus voltage value, arc suppression coil actuating signal, the bus single-phase earthing signal of being monitored by telemetry-acquisition module (2), state-signal collection module (3) automatic acquisition, and compare with the criterion that logic judgment module (5) sets, to determine nature of trouble; Provide control strategy by strategic control module (6) according to bus networks topology situation, policy enforcement module (7) forms straighforward operation sequence according to control strategy, pushes to automation system for the power network dispatching perform by communication interface.
2. one-phase earthing failure in electric distribution network as claimed in claim 1 tries to draw Detection & Controling device automatically, it is characterized in that, when monitoring bus three-phase voltage value wherein one is less than 10% of phase voltage mutually, other two phase voltages are greater than 80% of line voltage, and arc suppression coil actuating signal transmits, busbar grounding signal transmits, when above condition meets simultaneously, described logic judgment module (5) judges bus generation earth fault, starts strategic control module (6).
3. one-phase earthing failure in electric distribution network as claimed in claim 1 tries to draw Detection & Controling device automatically, it is characterized in that, described strategic control module (6) will draw road order to send to policy enforcement module (7) to form straighforward operation sequence, tried one by one to draw by automation system for the power network dispatching, find out ground path.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105871645A (en) * 2016-06-16 2016-08-17 国网江苏省电力公司无锡供电公司 Automatic collecting and publishing device for grid fault information
CN107167701A (en) * 2017-03-06 2017-09-15 国网浙江义乌市供电公司 Automatically method is sentenced in choosing to distribution singlephase earth fault circuit
CN110888015A (en) * 2019-10-16 2020-03-17 国电南瑞科技股份有限公司 Single-phase earth fault positioning method for power distribution automation system
CN110927621A (en) * 2019-11-12 2020-03-27 上海宝钢工业技术服务有限公司 Grounding detection positioning system for closed friction electric track of conveying chain
CN111585340A (en) * 2019-02-15 2020-08-25 南京南瑞继保电气有限公司 Main power distribution network single-phase grounding pull-out auxiliary decision-making method based on multi-source data
CN112688436A (en) * 2021-03-15 2021-04-20 国网四川省电力公司电力科学研究院 Arc suppression coil online sensing system and method based on power distribution internet of things

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CN102611080A (en) * 2012-03-16 2012-07-25 国电南瑞科技股份有限公司 Main station type small current grounding control method
CN203014487U (en) * 2012-11-13 2013-06-19 江苏省电力公司滨海县供电公司 Low-current grounding exploration apparatus
CN203932988U (en) * 2014-01-28 2014-11-05 济南置真电气有限公司 A kind of low current grounding tripping operation and self-healing system

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CN101872999A (en) * 2010-07-07 2010-10-27 宁夏电力公司吴忠供电局 Low-voltage alternating current power supply programmable switching system of substation
CN102611080A (en) * 2012-03-16 2012-07-25 国电南瑞科技股份有限公司 Main station type small current grounding control method
CN203014487U (en) * 2012-11-13 2013-06-19 江苏省电力公司滨海县供电公司 Low-current grounding exploration apparatus
CN203932988U (en) * 2014-01-28 2014-11-05 济南置真电气有限公司 A kind of low current grounding tripping operation and self-healing system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105871645A (en) * 2016-06-16 2016-08-17 国网江苏省电力公司无锡供电公司 Automatic collecting and publishing device for grid fault information
CN105871645B (en) * 2016-06-16 2019-01-01 国网江苏省电力公司无锡供电公司 Electric network fault automatic information collecting and distributing device
CN107167701A (en) * 2017-03-06 2017-09-15 国网浙江义乌市供电公司 Automatically method is sentenced in choosing to distribution singlephase earth fault circuit
CN111585340A (en) * 2019-02-15 2020-08-25 南京南瑞继保电气有限公司 Main power distribution network single-phase grounding pull-out auxiliary decision-making method based on multi-source data
CN110888015A (en) * 2019-10-16 2020-03-17 国电南瑞科技股份有限公司 Single-phase earth fault positioning method for power distribution automation system
CN110927621A (en) * 2019-11-12 2020-03-27 上海宝钢工业技术服务有限公司 Grounding detection positioning system for closed friction electric track of conveying chain
CN112688436A (en) * 2021-03-15 2021-04-20 国网四川省电力公司电力科学研究院 Arc suppression coil online sensing system and method based on power distribution internet of things
CN112688436B (en) * 2021-03-15 2021-06-29 国网四川省电力公司电力科学研究院 Arc suppression coil online sensing system and method based on power distribution internet of things

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