CN106199310A - A kind of power distribution network intermittent arc grounding fault simulating test equipment and method - Google Patents

A kind of power distribution network intermittent arc grounding fault simulating test equipment and method Download PDF

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Publication number
CN106199310A
CN106199310A CN201610543564.9A CN201610543564A CN106199310A CN 106199310 A CN106199310 A CN 106199310A CN 201610543564 A CN201610543564 A CN 201610543564A CN 106199310 A CN106199310 A CN 106199310A
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CN
China
Prior art keywords
electrode
discharge
motor
arc
power distribution
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Pending
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CN201610543564.9A
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Chinese (zh)
Inventor
刘健
张小庆
权立
申巍
张志华
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ELECTRIC POWER RESEARCH INSTITUTE STATE GRID SHAANXI ELECTRIC POWER Co
State Grid Corp of China SGCC
Original Assignee
ELECTRIC POWER RESEARCH INSTITUTE STATE GRID SHAANXI ELECTRIC POWER Co
State Grid Corp of China SGCC
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Application filed by ELECTRIC POWER RESEARCH INSTITUTE STATE GRID SHAANXI ELECTRIC POWER Co, State Grid Corp of China SGCC filed Critical ELECTRIC POWER RESEARCH INSTITUTE STATE GRID SHAANXI ELECTRIC POWER Co
Priority to CN201610543564.9A priority Critical patent/CN106199310A/en
Publication of CN106199310A publication Critical patent/CN106199310A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

Abstract

The open a kind of power distribution network intermittent arc grounding fault simulating test equipment of the present invention and method, testing equipment includes fuse, chopper, high-capacity resistor, arc discharge model and voltage transformer;One end of fuse is by insulated conductor and a phase of overlap joint gold utensil connection line, the other end of fuse connects one end of chopper, the other end of chopper connects high-capacity resistor, and the other end of high-capacity resistor connects the high-field electrode of arc discharge model, the ground electrode of arc discharge model passes through insulated conductor ground connection;The controller of arc discharge model gathers the electric voltage frequency of test line, phase place, is controlled rotating speed and the position of the motor of arc discharge model by pulse signal, it is achieved the discharge frequency of the intermittent arc light discharge is controlled, discharge phase is controlled.The present invention passes through chopper, high-capacity resistor, arc discharge model, it is achieved the simulation to distribution line intermittent arc grounding phenomenon.

Description

A kind of power distribution network intermittent arc grounding fault simulating test equipment and method
[technical field]
The invention belongs to power test technical field, be specifically related to a kind of power distribution network intermittent arc grounding fault simulation examination Test equipment and method.
[background technology]
The power distribution network of China 3~66kV typically uses isolated neutral or the working method through grounding through arc.? Under this working method, when there is singlephase earth fault, the electric current flowing through earth point is the least, so being commonly referred to as small current neutral grounding System.The probability of small current neutral grounding system generation singlephase earth fault is the highest, can account for the 80% of total failare.Along with power distribution network scale Expansion and city net, a large amount of uses of the further in-depth of the upgrading of rural power grids, especially cable run, cause system capacitive current to increase Greatly, when the earthing capacitance current of electrical network reaches a certain marginal value, ground arc is difficult to moment self-extinguish, the most thus produces Raw intermittent arcing ground over-voltage, action time is the longest, and throughout whole electrical network, easily causes under certain condition Accident.In actual small current neutral grounding system, ground connection process is typically the process of electric arc intermittent earth, and the electric arc of generation is unstable Determining electric arc, this electric arc is difficult to self-extinguish, but is not enough to stable burning, formed half or several cycle time combustion time go out put Electrical phenomena.Electric arc puts out combustion frequently, can produce a lot of high fdrequency component, is easily formed persistent period length, affects wide intermittent arc Light ground connection, induces electric arc overvoltage, and then damage equipment, destroys system safety operation.
At present, the device positioned for one-phase earthing failure in electric distribution network in a large number has been had to install in power distribution network and apply, In order to realize the fault location of power distribution network single-phase earthing, and intermittent arc grounding is common singlephase earth fault phenomenon, because of Can this device needing development test method to position singlephase earth fault realize intermittent arc grounding fault location actually Test and verify, in order to finding single-phase earth fault positioning device and the defect of system in time, and enter targetedly Row is perfect.
The common testing methods of single-phase earth fault positioning device for electrical power distribution network is secondary singal injection method.Secondary singal is injected The genealogy of law by being modeled at power system simulation software, simulation calculation to singlephase earth fault waveform, put by signal source The device that big output positions to singlephase earth fault, simulation singlephase earth fault phenomenon carries out test to the performance of tested device and tests Card.The electric arc that during intermittent arc grounding, earth point is formed is actually the impedance of a nonlinearity, when having the strongest Becoming characteristic, the electric arc of formation is more than inductance and the capacitive component also having equivalence containing resistive component, and the form of reality The different conditions such as the length that along with the size of arc current, can form electric arc again and surrounding change a lot.Cause This, built phantom accurately and be described electric arc relatively difficult, tested by secondary singal injection method, test knot Really credibility is relatively low.
In sum, there is presently no one to connect for the intermittent arc light of single-phase earth fault positioning device process reliably The performance test methods on ground and testing equipment.
[summary of the invention]
It is an object of the invention to provide a kind of power distribution network intermittent arc grounding fault simulating test equipment and method, with Realize single-phase earth fault positioning device is processed the performance test of intermittent arc grounding.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of power distribution network intermittent arc grounding fault simulating test equipment, including fuse, chopper, Large Copacity resistance Device, arc discharge model and voltage transformer;Insulated conductor and a phase of overlap joint gold utensil connection line are passed through in one end of fuse, The other end of fuse connects one end of chopper, and the other end of chopper connects high-capacity resistor, high-capacity resistor The other end connects the high-field electrode of arc discharge model, the ground electrode of arc discharge model passes through insulated conductor ground connection;For Between collection fuse and chopper, on circuit, the outfan of the voltage transformer of voltage-to-ground is connected the control of arc discharge model The input of device processed.
Further, described arc discharge model includes high-field electrode, ground electrode, electrode disk, motor, controller And insulating support;Wherein insulating support is made up of the support pillar of upper and lower two horizontal plates and two horizontal plates of connection;High-tension electricity Extremely brass material bar electrode, is fixed on the upper horizontal plate of insulating support, and ground electrode is brass material bar electrode, is fixed on On the lower horizontal board of insulating support, high-field electrode is in the surface of ground electrode;Electrode disk is insulant disk, and edge is uniform Some conductive poles are installed;The output shaft of motor connects the center of electrode disk;Electrode disk arranges the edge of conductive pole and is positioned at height Between piezoelectricity pole and ground electrode;The signal output part of controller is connected with motor signal input part.
Further, electrode disk is connected by shaft joint with motor, and motor drags electrode disk and rotates, electrode disk On arbitrary conductive pole by arcing during gap between high-field electrode, ground electrode, blow-out when conductive pole leaves gap.
Further, controller gathers the electric voltage frequency of test line, phase place, controls motor by pulse signal Rotating speed and position, it is achieved the discharge frequency of the intermittent arc light discharge is controlled, discharge phase is controlled.
Further, a diameter of 55cm of electrode disk, 10 conductive poles are uniformly installed at edge.
Further, the electric voltage frequency of test line is f, and the rotating speed of motor is n, and controller passes through pulse signal control The rotating speed n=6f of motor processed, unit r/min;Control the arbitrary conductive pole in the electrode disk that motor drags at voltage By the gap between high-field electrode, ground electrode when phase place is 90 °, it is achieved wave-wave peak discharge weekly;Or, controller passes through Pulse signal controls the rotating speed n=12f of motor, unit r/min;Control arbitrary leading in the electrode disk that motor drags Electricity post by gap between high-field electrode, ground electrode, then realizes weekly wave-wave peak, trough each when voltage-phase is 90 ° Electric discharge is once.
A kind of power distribution network intermittent arc grounding fault simulation test method, comprises the following steps: start controller collection Voltage signal, controls motor by controller after 5 minutes and drags electrode disk rotation, control breaker closing, through excessive appearance Amount resistor arc discharge modeling the intermittent arc light discharge, controls breaker open operation after time delay, terminate intermittent arc light and put Electricity.
Compared with prior art, the method have the advantages that
The invention provides a kind of power distribution network intermittent arc grounding fault simulating test equipment and method, can join actual The intermittent arc grounding phenomenon that on power network line, true generation is common, to realize processing for single-phase earth fault positioning device The performance test of intermittent arc grounding;
Further, the present invention provide testing equipment and method be applicable to all principles singlephase earth fault location dress Putting, compared with conventional single-phase earthing secondary singal injection method, the scope of application is wider;
Further, the test method that the present invention provides can truly occur intermittent arc grounding phenomenon, with conventional list Phase ground connection secondary singal injection method is compared, and test result credibility is higher;
Further, controller gathers the electric voltage frequency of test line, phase place, is controlled the rotating speed of motor by pulse signal And position, it is achieved the discharge frequency of the intermittent arc light discharge is controlled, discharge phase is controlled.
[accompanying drawing explanation]
Fig. 1 is principle and the wiring signal of the present invention a kind of power distribution network intermittent arc grounding fault simulating test equipment Figure.
Fig. 2 is the structural representation of arc discharge model.
Fig. 3 is the structural scheme of mechanism of electrode disk.
Fig. 4 is the voltage recorder data of embodiment of the present invention earth point.
[detailed description of the invention]
It is described further below with reference to accompanying drawing with to the content of invention:
Refer to shown in Fig. 1, one power distribution network intermittent arc grounding fault simulating test equipment of the present invention, including: molten Disconnected device 1, chopper 2, high-capacity resistor 3, arc discharge model 4 and voltage transformer 5.
One end of fuse is by insulated conductor and overlap joint gold utensil connection line, and the other end of fuse connects chopper One end, the other end of chopper connects high-capacity resistor, and the other end of high-capacity resistor connects the height of arc discharge model 4 Piezoelectricity pole 41, the ground electrode 42 of arc discharge model pass through insulated conductor ground connection;For gathering between fuse 1 and chopper The outfan of the voltage transformer of the voltage-to-ground on circuit connects the input of the controller 46 of arc discharge model.
Referring to shown in Fig. 2, arc discharge model 4 includes: high-field electrode 41, ground electrode 42, electrode disk 44, stepping electricity Machine 45, controller 46 and insulating support 42;Wherein insulating support 42 by upper and lower two horizontal plates and connects propping up of two horizontal plates Support pillar composition;High-field electrode 41 is brass material bar electrode, is fixed on the upper horizontal plate of insulating support;Ground electrode 42 is Brass material bar electrode, is fixed on the lower horizontal board of insulating support;High-field electrode is in the surface of ground electrode;Electrode disk 44 It is connected by shaft joint with motor 45;Controller 46 signal input part connects voltage transformer signal output part, and controller is believed Number outfan is connected with motor signal input part.
Referring to shown in Fig. 3, electrode disk 44 is the insulant disk of diameter 50cm, and 10 conductive poles are uniformly installed at edge 440.Electrode disk 44 is connected by shaft joint with motor 45, and motor 45 drags electrode disk 44 and rotates, motor 45 Arbitrary conductive pole 440 in the electrode disk 44 dragged passes through arcing during the gap between high-field electrode 41, ground electrode 42, conduction Blow-out when post 440 leaves gap.Controller 46 signal input part connects voltage transformer 5 signal output part, and controller 46 signal is defeated Go out end to be connected with motor 45 signal input part.Controller 46 gathers the electric voltage frequency of test line, phase place, simultaneously to stepping Rotating speed and the position of motor 45 are controlled, if the electric voltage frequency of test line is f, the rotating speed of motor 45 is n, controller 46 control the rotating speed n=6f (r/min) of motor 45 by pulse signal, control in the electrode disk 44 that motor 45 drags Arbitrary conductive pole 440 when voltage-phase is 90 ° by gap between high-field electrode 41, ground electrode 42, then realize every Cycle peak discharge;Or, controller 46 controls the rotating speed n=12f (r/min) of motor 45 by pulse signal, controls The arbitrary conductive pole 440 in electrode disk 44 that motor 45 drags passes through high-field electrode 41, ground connection when voltage-phase is 90 ° Gap between electrode 42, then realize wave-wave peak, trough weekly and respectively discharge once.Realize intermittent arc light according to said method to put The discharge frequency of electricity is controlled, discharge phase is controlled.
One power distribution network intermittent arc grounding fault simulation test method of the present invention, is taken by charged according to shown in Fig. 1 Connect gold utensil and insulated conductor, fuse 1 one end is snapped in a phase of test line, by the ground connection electricity of arc grounding model 4 Pole 42 is by insulated conductor ground connection.Start arc grounding model and after 4,5 minutes, control the 2-in-1 lock of chopper, start simulation intermittence Arc grounding, controls chopper 2 separating brake, end simulation intermittent arc grounding after time delay.
At the scene actual track utilize this device in the protection zone of tested single-phase earth fault positioning device for electrical power distribution network and Simulate intermittent arc grounding outside protection zone respectively, observe the positioning result of tested positioner, thus measurements determination position device Process performance to intermittent arc grounding.Described by Fig. 4 be by power distribution network arc grounding test time, set wave-wave weekly The voltage recorder data of earth point under paddy discharge condition.

Claims (7)

1. a power distribution network intermittent arc grounding fault simulating test equipment, it is characterised in that include fuse, chopper, High-capacity resistor, arc discharge model and voltage transformer;One end of fuse is connected by insulated conductor and overlap joint gold utensil One phase of circuit, the other end of fuse connects one end of chopper, and the other end of chopper connects high-capacity resistor, great Rong The other end of amount resistor connects the high-field electrode of arc discharge model, the ground electrode of arc discharge model passes through insulated conductor Ground connection;It is connected arc discharge for gathering between fuse with chopper the outfan of the voltage transformer of voltage-to-ground on circuit The input of the controller of model.
A kind of power distribution network intermittent arc grounding fault simulating test equipment the most according to claim 1, it is characterised in that: Described arc discharge model includes high-field electrode, ground electrode, electrode disk, motor, controller and insulating support;The most exhausted Edge support is made up of the support pillar of upper and lower two horizontal plates and two horizontal plates of connection;High-field electrode is brass material rod electricity Pole, is fixed on the upper horizontal plate of insulating support, and ground electrode is brass material bar electrode, is fixed on the lower level of insulating support On plate, high-field electrode is in the surface of ground electrode;Electrode disk is insulant disk, and some conductive poles are uniformly installed at edge; The output shaft of motor connects the center of electrode disk;Electrode disk arranges the edge of conductive pole and is positioned at high-field electrode and ground electrode Between;The signal output part of controller is connected with motor signal input part.
A kind of power distribution network intermittent arc grounding fault simulating test equipment the most according to claim 2, it is characterised in that: Electrode disk is connected by shaft joint with motor, and motor drags electrode disk and rotates, and the arbitrary conductive pole in electrode disk leads to Arcing when crossing the gap between high-field electrode, ground electrode, blow-out when conductive pole leaves gap.
A kind of power distribution network intermittent arc grounding fault simulating test equipment the most according to claim 2, it is characterised in that: A diameter of 55cm of electrode disk, 10 conductive poles are uniformly installed at edge.
A kind of power distribution network intermittent arc grounding fault simulating test equipment the most according to claim 2, it is characterised in that: Controller gathers the electric voltage frequency of test line, phase place, is controlled rotating speed and the position of motor by pulse signal, it is achieved The discharge frequency of having a rest property arc discharge is controlled, discharge phase is controlled.
A kind of power distribution network intermittent arc grounding fault simulating test equipment the most according to claim 2, it is characterised in that: The electric voltage frequency of test line is f, and the rotating speed of motor is n, and controller controls the rotating speed n of motor by pulse signal =6f, unit r/min;Control the arbitrary conductive pole in the electrode disk that motor drags when voltage-phase is 90 ° by height Gap between piezoelectricity pole, ground electrode, it is achieved wave-wave peak discharge weekly;Or, controller controls stepping by pulse signal The rotating speed n=12f of motor, unit r/min;The arbitrary conductive pole controlled in the electrode disk that motor drags at voltage-phase is By the gap between high-field electrode, ground electrode when 90 °, then realize wave-wave peak, trough weekly and respectively discharge once.
7. a power distribution network intermittent arc grounding fault simulation test method, it is characterised in that: based in claim 1 to 6 A kind of power distribution network intermittent arc grounding fault simulating test equipment described in any one, comprises the following steps:
Start controller and gather voltage signal, control motor dragging electrode disk by controller after 5 minutes and rotate, control disconnected Road device closes a floodgate, and through high-capacity resistor arc discharge modeling the intermittent arc light discharge, controls breaker open operation after time delay, Terminate the intermittent arc light discharge.
CN201610543564.9A 2016-07-11 2016-07-11 A kind of power distribution network intermittent arc grounding fault simulating test equipment and method Pending CN106199310A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110095695A (en) * 2019-06-11 2019-08-06 云南电网有限责任公司电力科学研究院 A kind of oil clearance arc discharge experimental model
CN110161393A (en) * 2019-07-01 2019-08-23 云南电力技术有限责任公司 Intermittent electric arc test macro
CN110514955A (en) * 2019-07-01 2019-11-29 国网辽宁省电力有限公司电力科学研究院 A kind of low current neutral grounding electric network single phase intermittent arc-earth faults localization method
CN111123040A (en) * 2020-01-02 2020-05-08 国网湖北省电力有限公司电力科学研究院 Equipment and method for simulating intermittent arc grounding fault of power distribution network
CN110514955B (en) * 2019-07-01 2021-06-08 国网辽宁省电力有限公司电力科学研究院 Single-phase intermittent arc grounding fault positioning method for low-current grounding power grid

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104377683A (en) * 2014-11-28 2015-02-25 哈尔滨朗昇电气股份有限公司 Device and method for single-phase intermittent arc grounding overvoltage protection
CN104914391A (en) * 2015-05-05 2015-09-16 国家电网公司 Distribution network single-phase grounding fault simulation and positioning performance test platform and method
CN105425118A (en) * 2015-10-29 2016-03-23 山东建筑大学 Multi-information fusion fault arc detection method and device
CN105743075A (en) * 2016-04-22 2016-07-06 国家电网公司 Single-phase arc-grounding simulation device for power distribution network

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104377683A (en) * 2014-11-28 2015-02-25 哈尔滨朗昇电气股份有限公司 Device and method for single-phase intermittent arc grounding overvoltage protection
CN104914391A (en) * 2015-05-05 2015-09-16 国家电网公司 Distribution network single-phase grounding fault simulation and positioning performance test platform and method
CN105425118A (en) * 2015-10-29 2016-03-23 山东建筑大学 Multi-information fusion fault arc detection method and device
CN105743075A (en) * 2016-04-22 2016-07-06 国家电网公司 Single-phase arc-grounding simulation device for power distribution network

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110095695A (en) * 2019-06-11 2019-08-06 云南电网有限责任公司电力科学研究院 A kind of oil clearance arc discharge experimental model
CN110161393A (en) * 2019-07-01 2019-08-23 云南电力技术有限责任公司 Intermittent electric arc test macro
CN110514955A (en) * 2019-07-01 2019-11-29 国网辽宁省电力有限公司电力科学研究院 A kind of low current neutral grounding electric network single phase intermittent arc-earth faults localization method
CN110514955B (en) * 2019-07-01 2021-06-08 国网辽宁省电力有限公司电力科学研究院 Single-phase intermittent arc grounding fault positioning method for low-current grounding power grid
CN111123040A (en) * 2020-01-02 2020-05-08 国网湖北省电力有限公司电力科学研究院 Equipment and method for simulating intermittent arc grounding fault of power distribution network

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