CN107064733A - Power distribution network flexible ground device single-phase earth fault line selection and arc extinguishing method - Google Patents
Power distribution network flexible ground device single-phase earth fault line selection and arc extinguishing method Download PDFInfo
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- CN107064733A CN107064733A CN201710154375.7A CN201710154375A CN107064733A CN 107064733 A CN107064733 A CN 107064733A CN 201710154375 A CN201710154375 A CN 201710154375A CN 107064733 A CN107064733 A CN 107064733A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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Abstract
The invention discloses a kind of power distribution network flexible ground device single-phase earth fault line selection and arc extinguishing method, mainly include：When singlephase earth fault occurs for power distribution network; using virtual resistance control mode; flexible ground device is controlled to inject the controllable current in resistance property of an amplitude to neutral point; make system operation in low resistance grounding pattern; by measuring and comparing the zero-sequence current of each bar feeder line, failure judgement feeder line simultaneously feeds back to protective relaying device；Then virtual inductor control mode is used, control flexible ground device injects arc extinction compensation electric current to neutral point, makes system operation in Resonant-grounded mode, reach the purpose of singlephase earth fault extinguishing arc.This method passes through control mode switching; resonant earthed system can be avoided to be difficult to accurate failure judgement feeder line simultaneously; small resistance grounding system fault trip rate is higher; and conventional flex earthing or grounding means control method failure in high resistance ground be mutually difficult to detection the problems such as; false protection rate can be reduced; failure extinguishing arc success rate is improved, so as to improve distribution network reliability.
Description
Technical field
Application field is handled the present invention relates to one-phase earthing failure in electric distribution network, in particular it relates to which a kind of power distribution network flexibility connects
Ground device single-phase earth fault line selection and arc extinguishing method.
Background technology
Power distribution network is in the terminal of power system, complicated changeable, and is contacted closely with user, is easily caused all kinds of events
The generation of barrier.Singlephase earth fault is the failure occurred most frequently in power distribution network, and arc light, electric arc combustion can be produced when fault current is excessive
Burning will bring the significant damages such as fire, equipment damage；To solve the above mentioned problem of power distribution network, domestic and international power distribution network, which is generally used, to be changed
Become neutral grounding mode to limit earth-fault current, experienced isolated neutral --- connect through arc suppression coil
Ground --- through development courses such as low resistance groundings.Isolated neutral system remains to tape jam fortune after occurring singlephase earth fault
Row 1~2 hour, power supply reliability is high, but each mutually insulate need to be by phase voltageDesign again, it is higher to insulating requirements；Neutral point
Compensated distribution network can effectively reduce earth-fault current, but the access of arc suppression coil can cause failure line selection to be stranded
It is difficult；Through small resistance grounding system when occurring earth fault, short circuit current flow is very big, and protective relaying device can be dynamic in instant of failure
Make, cut off faulty line, but also reduce the power supply reliability of which simultaneously.
To meet the service requirement of the various states of power distribution network comprehensively, the defect of different earthing modes is made up, comprehensive utilization is each
The advantage of earthing mode is planted, and earthing mode is flexibly selected according to the running status of power network, it is proposed that a kind of power distribution network flexibility connects
Ground mode, by the switching of control mode, makes system be separately operable in low resistance grounding and Resonant-grounded mode, reaches and accurately distinguish
Know fault feeder and eliminate the purpose of ground-fault arc, improve the reliability of power supply.
The content of the invention
It is an object of the present invention to make up the defect of different earthing modes, the advantage of various earthing modes is comprehensively utilized, and
Earthing mode is flexibly selected according to the running status of power network, it is proposed that a kind of power distribution network flexible ground device singlephase earth fault choosing
Line and arc extinguishing method, with accurate recognition fault feeder and elimination ground-fault arc, improve the advantage of power supply reliability.
To achieve the above object, the technical solution adopted by the present invention is：A kind of power distribution network flexible ground device single-phase earthing
Failure line selection and arc extinguishing method, it is characterised in that mainly include：
1) when singlephase earth fault occurs for power distribution network, flexible ground device is made to work in virtual resistance pattern, to neutrality
The controllable current in resistance property of one amplitude of point injection, being equivalent to makes power distribution network run on low resistance grounding pattern；
2) zero-sequence current of each bar feeder line is measured, the amplitude size of the zero-sequence current of relatively more each bar feeder line judges zero sequence electricity
The feeder line for flowing amplitude maximum is earth fault feeder line, and fault feeder judged result is fed back into protective relaying device；
3) flexible ground device is worked in virtual inductor pattern, arc extinction compensation electric current is injected to neutral point, be fully compensated
Capacitance current of distribution network, realizes the purpose of failure extinguishing arc；
4) after certain time-delay, using specific extinguishing arc post-processing approach, flexible ground plant running state is determined, with true
Transient fault rapid arc extinction is protected, permanent fault is quickly isolated, distribution system continued power.
Further, the step 1) in virtual resistance pattern, specifically include：Pass through Second Order Generalized Integrator first
(Second Order Generalized Integrator, SOGI) obtains the power frequency component phase and amplitude of neutral point voltage,
Then Injection Current is calculated according to neutral resistance value set in advance, finally made using output current closed loop control method
Flexible ground device injects the electric current to power network neutral point.The step 3) in virtual inductor pattern, specifically include：First
The power frequency component phase and amplitude of neutral point voltage are obtained by SOGI, then according to neutral ground inductance value set in advance
Injection Current amplitude is calculated, it is finally electric using output further according to injected value of current is obtained after 90 degree of neutral point voltage Phase delay
Stream closed loop control method makes flexible ground device inject the electric current to power network neutral point.The step 4) in extinguishing arc post processing
Method, is specifically included：Injecting compensating current amplitude is reduced, power distribution network residual voltage is measured, judges it whether with compensation electric current
Reduce and proportional reduction.If so, then making flexible ground device out of service；If it is not, then sending dynamic to protective relaying device
Make signal, isolated fault feeder line；If protection device tripping, continue to inject arc extinction compensation electric current, in compensation electric current injection length
Reach after 2 hours, make flexible ground device out of service.
Power distribution network flexible ground device single-phase earth fault line selection and arc extinguishing method proposed by the present invention, due to main bag
Include：When singlephase earth fault occurs for power distribution network, using virtual resistance control mode, control flexible ground device is noted to neutral point
Enter the controllable current in resistance property of an amplitude, make system operation in low resistance grounding pattern, by measure and compare each bar feeder line zero
Sequence electric current, failure judgement feeder line simultaneously feeds back to protective relaying device；Then virtual inductor control mode is used, flexible ground is controlled
Device injects arc extinction compensation electric current to neutral point, makes system operation in Resonant-grounded mode, reaches singlephase earth fault extinguishing arc
Purpose.This method can avoid resonant earthed system to be difficult to accurate failure judgement feeder line, small electricity simultaneously by control mode switching
Hinder grounding system fault trip-out rate higher, and conventional flex earthing or grounding means control method failure in high resistance ground is mutually difficult to examine
The problems such as survey, false protection rate can be reduced, failure extinguishing arc success rate be improved, so as to improve distribution network reliability.
The present invention is further illustrated below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is power distribution network flexible ground system topological figure.
Fig. 2 is power distribution network flexible ground system equivalent circuit diagram.
Fig. 3 is Second Order Generalized Integrator (SOGI) structure chart.
Fig. 4 is power distribution network flexible ground System control structures schematic diagram.
Fig. 5 is distribution network ground fault arc extinction and route selection flow chart.
Embodiment
The present invention proposes a kind of power distribution network flexible ground device single-phase earth fault line selection and arc extinguishing method, shown in Fig. 1
For power distribution network flexible ground system schematic.EX(X=A, B, C) represents A, B, C three-phase mains voltages respectively；RSIt is every for power distribution network
Bleeder resistance relatively, CSFor per relatively electric capacity；Assuming that singlephase earth fault, R occur for C phasesFFor ground fault resistance；Match somebody with somebody
Neutral point of electric network is grounded by flexible ground device, as shown in dotted line frame in Fig. 1, comprising a dc source, single-phase inverter,
LC wave filters and isolating transformer Ti；Inverter is by dc source vdPower supply, produces amplitude by PWM inversions and phase is controllable
Injection Current IiInject neutral point.
When flexible ground device works in virtual resistance control model, pass through Second Order Generalized Integrator (Second Order
Generalized Integrator, SOGI) obtain neutral point voltage UNPower frequency component phase and amplitude, according to default
Neutral resistance value calculates Injection Current when making virtual resistance control.In view of the capacity of flexible ground device, with reference to
Traditional neutral point accesses the requirement of resistance value through centering point in small resistance grounding system, and default neutral resistance value is
Rn, then the current in resistance property expression formula injected is：
When flexible ground device works in virtual inductor control model, flexible ground device is equivalent to a controllable electric current
Source, uses controllable current source IiInstead of neutral point voltage-to-ground is UN, failure phase-to-ground voltage is UF, power distribution network flexible ground system
Equivalent circuit diagram is as shown in Figure 2.The expression formula that can obtain Injection Current by kirchhoffs law is：
When only considering the influence of direct-to-ground capacitance parameter, the expression formula of Injection Current can be reduced to:
In order to be zero by fault current limitation, i.e.,The expression formula for obtaining Injection Current is：
When power distribution network is by grounding through arc, capacitance current of distribution network is compensated by parallel resonance principle, suppresses ground connection
Fault electric arc.The present invention is based on the principle, and power network neutral point passes through virtual inductor control by being connected with flexible ground device
System, makes system operation in Resonant-grounded mode；When occurring earth fault, the controllable compensation electric current of one amplitude, phase of injection,
Earthing capacitance current when compensating failure, reaches the purpose for eliminating fault electric arc.Therefore, by the control method of virtual inductor, it is
When system runs on Resonant-grounded mode, equivalent virtual inductor is expressed as Lv, can obtain injecting the expression formula of arc extinction compensation electric current
For：
Second Order Generalized Integrator (SOGI) structure chart is as shown in Figure 3.Give an input signal uNs, pass through second order Generalized Product
Being divided to device to obtain, two amplitudes are identical, and phase differs 90 degree of output signal uN1And uN2；Wherein uN1With input signal uNsFundamental wave
ComponentIt is identical, uN2Amplitude withIt is identical, but delayed phase90 degree.I.e.：
Power distribution network flexible ground System control structures schematic diagram is as shown in figure 4, when occurring singlephase earth fault, flexibility connects
Ground device works in virtual resistance control model first, i.e., switch is connected with port 1, is obtained by Second Order Generalized Integrator (SOGI)
Obtain neutral point voltage uNsPhase and the amplitude of fundamental signal be u shown in Fig. 3N1, then according to neutral ground set in advance
Resistance value calculates the current in resistance property value of injectionI.e.：
, finally flexible ground device is injected the electric current to power network neutral point using output current closed loop control method,
Failure judgement feeder line simultaneously feeds back to protective relaying device；Then virtual inductor control model is switched to open in flexible ground device
Pass is connected with port 2, and the power frequency component phase and amplitude of neutral point voltage are obtained by SOGI, then by after neutral point voltage phase
Move 90 degree i.e. u shown in Fig. 3N2, the compensation current then injected according to neutral ground inductance value calculation set in advance
I.e.：
, finally flexible ground device is injected the extinguishing arc to power network neutral point using output current closed loop control method and mend
Electric current is repaid, the purpose for eliminating fault electric arc is reached.
Fig. 5 show distribution network ground fault arc extinction and route selection flow chart.When occurring singlephase earth fault, first continuously
Power distribution network phase voltage and residual voltage are measured, is respectivelyUNn(n=1,2,3 ... ...), compares phase voltage and residual voltage
Size；When residual voltage is more than the 15% of phase voltage, judgement there occurs earth fault；Earth fault occur it is initial when
Carve, flexible ground device works in virtual resistance control model, passes through Second Order Generalized Integrator as shown in Figure 3 first
(Second Order Generalized Integrator, SOGI) obtains the power frequency component phase and amplitude of neutral point voltage,
Then according to neutral resistance value R set in advancenInjection Current is calculated, finally using output current closed loop control method
Flexible ground device is injected the electric current to power network neutral point, so as to increase the zero-sequence current in circuit in short-term, pass through electricity
Flow sensor detects and compares the zero-sequence current of each bar feeder line respectively, and the feeder line of amplitude maximum is earth fault feeder line, and will
Fault feeder judged result feeds back to protective relaying device；Then flexible ground device switches to virtual inductor control model, leads to
Power frequency component phase and amplitude that SOGI obtains neutral point voltage are crossed, then according to neutral ground inductance value meter set in advance
Injection Current amplitude is calculated, further according to injected value of current is obtained after 90 degree of neutral point voltage Phase delay, finally using output current
Closed loop control method makes flexible ground device inject the electric current to power network neutral point, suppresses ground-fault arc；By certain
After delay, using specific extinguishing arc post-processing approach, specifically include：Injecting compensating current amplitude is reduced, power distribution network zero sequence is measured
Voltage, judge its whether with compensation electric current reduction and proportional reduction.If so, then making flexible ground device out of service；If
It is not, then to protective relaying device sending action signal, isolated fault feeder line；If protection device tripping, continue to inject extinguishing arc
Electric current is compensated, after compensation electric current injection length reaches 2 hours, makes flexible ground device out of service.
Claims (4)
1. power distribution network flexible ground device single-phase earth fault line selection and arc extinguishing method, comprise the following steps：
1) when singlephase earth fault occurs for power distribution network, flexible ground device is worked in virtual resistance pattern, noted to neutral point
Enter the controllable current in resistance property of an amplitude, being equivalent to makes power distribution network run on low resistance grounding pattern；
2) zero-sequence current of each bar feeder line is measured, the amplitude size of the zero-sequence current of relatively more each bar feeder line judges zero-sequence current width
The maximum feeder line of value is earth fault feeder line, and fault feeder judged result is fed back into protective relaying device；
3) flexible ground device is worked in virtual inductor pattern, arc extinction compensation electric current is injected to neutral point, distribution is fully compensated
Net capacitance current, realizes the purpose of failure extinguishing arc；
4) after certain time-delay, using specific extinguishing arc post-processing approach, flexible ground plant running state is determined, to ensure wink
When failure rapid arc extinction, permanent fault quickly isolates, distribution system continued power.
2. according to step 1 described in claim 1) in virtual resistance pattern, it is characterised in that pass through Second Order Generalized Integrator first
（Second Order Generalized Integrator, SOGI）Obtain the power frequency component phase and width of neutral point voltage
Value, then calculates Injection Current, finally using output current closed-loop control side according to neutral resistance value set in advance
Method makes flexible ground device inject the electric current to power network neutral point.
3. step 3 according to claim 1) in virtual inductor pattern, it is characterised in that pass through SOGI first and obtain neutral
The power frequency component phase and amplitude of point voltage, then according to neutral ground inductance value calculation Injection Current width set in advance
Value, further according to injected value of current is obtained after 90 degree of neutral point voltage Phase delay, finally using output current closed loop control method
Flexible ground device is set to inject the electric current to power network neutral point.
4. step 4 according to claim 1) in extinguishing arc post-processing approach, it is characterised in that reduction injecting compensating electric current width
Value, measure power distribution network residual voltage, judge its whether with compensation electric current reduction and proportional reduction.If so, then connecing flexibility
Ground device is out of service；If it is not, then to protective relaying device sending action signal, isolated fault feeder line；If protection device is refused
It is dynamic, then continue to inject arc extinction compensation electric current, after compensation electric current injection length reaches 2 hours, flexible ground device is exited fortune
OK.
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| CN110389276A (en) * | 2019-08-06 | 2019-10-29 | 安徽凯川电力保护设备有限公司 | A kind of singlephase earth fault management system and method |
| WO2020087811A1 (en) * | 2018-11-01 | 2020-05-07 | 杭州求创电力科技有限公司 | Method for suppressing fault phase residual voltage of resonant grounding system based on precise tuning control on active adjustable complex impedance |
| WO2020140583A1 (en) * | 2019-01-04 | 2020-07-09 | 中国南方电网有限责任公司超高压输电公司梧州局 | Detection device and method for distinguishing branches having capacitive or resistive instantaneous ground faults |
| CN111398732A (en) * | 2020-03-14 | 2020-07-10 | 华中科技大学 | Power distribution network system based on active control of ground potential fluctuation and fault identification method thereof |
| CN111505440A (en) * | 2020-04-27 | 2020-08-07 | 云南拓普特种电源科技有限公司 | Ground fault detection and protection system and method based on class D power amplifier |
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| CN114660505A (en) * | 2022-05-07 | 2022-06-24 | 云南电网有限责任公司电力科学研究院 | Power distribution system ground fault disappearance detection method and device and computer equipment |
| EP3923434B1 (en) * | 2019-03-26 | 2023-10-25 | Huawei Digital Power Technologies Co., Ltd. | Energy storage system electric arc detection and protection method and related device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397807A (en) * | 2002-08-16 | 2003-02-19 | 华中科技大学 | Method for positioning grounding failure region of feed line in low-current grounding system |
| RU2254586C1 (en) * | 2003-12-24 | 2005-06-20 | Новосибирский государственный технический университет | Method of finding feeder with single-phase arc fault to ground in radial distribution cable circuits |
| EP1693679A1 (en) * | 2005-02-21 | 2006-08-23 | Adaptive Regelsysteme GmbH | Method for the determination of a parameter of an electric power supply network |
| CN101261304A (en) * | 2008-04-25 | 2008-09-10 | 山东大学 | Low current grounding system distribution circuit single-phase earth fault automatic position setting method |
| CN101368998A (en) * | 2008-10-15 | 2009-02-18 | 中国矿业大学 | Route selection method suitable for arc suppression coil earthing electric network |
| CN102074950A (en) * | 2011-01-13 | 2011-05-25 | 长沙理工大学 | Distribution network ground fault arc extinction and protection method |
| CN102288872A (en) * | 2011-06-30 | 2011-12-21 | 山东省电力学校 | Small-current grounding system single-phase grounding fault distance measurement method based on signal injection method |
| CN105990841A (en) * | 2015-04-17 | 2016-10-05 | 长沙理工大学 | Resonant injection type power distribution line three-phase unbalance overvoltage suppression device |
-
2017
- 2017-03-15 CN CN201710154375.7A patent/CN107064733B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397807A (en) * | 2002-08-16 | 2003-02-19 | 华中科技大学 | Method for positioning grounding failure region of feed line in low-current grounding system |
| RU2254586C1 (en) * | 2003-12-24 | 2005-06-20 | Новосибирский государственный технический университет | Method of finding feeder with single-phase arc fault to ground in radial distribution cable circuits |
| EP1693679A1 (en) * | 2005-02-21 | 2006-08-23 | Adaptive Regelsysteme GmbH | Method for the determination of a parameter of an electric power supply network |
| CN101261304A (en) * | 2008-04-25 | 2008-09-10 | 山东大学 | Low current grounding system distribution circuit single-phase earth fault automatic position setting method |
| CN101368998A (en) * | 2008-10-15 | 2009-02-18 | 中国矿业大学 | Route selection method suitable for arc suppression coil earthing electric network |
| CN102074950A (en) * | 2011-01-13 | 2011-05-25 | 长沙理工大学 | Distribution network ground fault arc extinction and protection method |
| CN102288872A (en) * | 2011-06-30 | 2011-12-21 | 山东省电力学校 | Small-current grounding system single-phase grounding fault distance measurement method based on signal injection method |
| CN105990841A (en) * | 2015-04-17 | 2016-10-05 | 长沙理工大学 | Resonant injection type power distribution line three-phase unbalance overvoltage suppression device |
Non-Patent Citations (3)
| Title |
|---|
| WEN WANG ET AL.: "Principle and Design of a Single-Phase Inverter-Based Grounding System for Neutral-to-Ground Voltage Compensation in Distribution Networks", 《IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS》 * |
| 曾祥君 等: "基于配电网柔性接地控制的故障消弧与馈线保护新原理", 《中国电机工程学报》 * |
| 陈锐 等: "基于双闭环控制的配电网单相接地故障有源消弧方法", 《电力系统自动化》 * |
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