CN110146763A - Arc suppression coil parallel connection low-resistance grounding device test method, equipment and storage medium - Google Patents
Arc suppression coil parallel connection low-resistance grounding device test method, equipment and storage medium Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a kind of arc suppression coil parallel connection low-resistance grounding device test method, equipment and storage mediums, this method comprises: control first switch module, second switch module and third switch module carry out n times switching, to simulate single single phase metal ground fault impedance earth failure and arc-earth faults；Low resistance switching parameter when any of the above-described ground fault is obtained, as the first test parameters；Wherein, low resistance switching parameter includes: the compensation electric current and grounding point electric current that neutral point voltage-to-ground, the arc suppression coil when low resistance earthing resistor is not put into export, the electric current of low resistance earthing resistor when low resistance earthing resistor is put into, the excision moment of low resistance earthing resistor；When the first test parameters meets preset single single phase grounding test condition, determine that arc suppression coil parallel connection low-resistance grounding device passes through single singlephase earth fault test；This method is able to verify that the reliability of arc suppression coil parallel connection low-resistance grounding device.
Description
Technical field
The present invention relates to arc suppression coil parallel connection low resistance earthing technical field more particularly to a kind of arc suppression coil low electricity in parallel
Hinder earthing or grounding means test method, equipment and storage medium.
Background technique
In the power system, neutral grounding mode be according to the size of the dielectric level of grid equipment, capacitance current come
Selection.For the power distribution network based on overhead line, neutral by arc extinction coil grounding mode is generally used；For with cable
Urban power distribution network based on road, singlephase earth fault capacitance current is biggish, mostly uses Neutral Point Through Low Resistance mode.But
It is that neutral by arc extinction coil grounding mode brings certain difficulty to permanent fault route selection, it is difficult to quickly and accurately cut off
Failure；Transient earthing failure and permanent earth fault cannot be distinguished in Neutral Point Through Low Resistance mode, single-phase connects to all
Ground starts line tripping, increases line tripping number, affects power supply reliability.Using arc suppression coil parallel low resistance
The advantages of neutral flexible grounding mode can eliminate transient fault in conjunction with arc suppression coil, small resistance quickly isolates both permanent faults,
It solves the problems, such as to be individually present, greatly improves the Supply Security and reliability of power distribution network.Arc suppression coil parallel low resistance at present
Neutral flexible grounding control device succeeded in developing, generally try out in China, achieve good result.
Currently, there is also certain deficiencies for the working principle of arc suppression coil parallel connection low-resistance grounding device, therefore to arc blowout wire
Low-resistance grounding device in parallel is enclosed to be tested, the reliability of verifying card arc suppression coil parallel connection low-resistance grounding device in extinguishing arc
It is particularly important during coils from parallel connection of coils low-resistance grounding device.But lack currently on the market to arc suppression coil parallel connection
The test method of low-resistance grounding device.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of tests of arc suppression coil parallel connection low-resistance grounding device
Method is able to verify that the reliability of arc suppression coil parallel connection low-resistance grounding device.
In a first aspect, the embodiment of the invention provides a kind of arc suppression coil parallel connection low-resistance grounding device test method, packet
Include following steps:
It successively controls first switch module, second switch module and third switch module and carries out n times switching, successively to simulate
Single single phase metal ground fault, single single phase impedance ground fault and the single-phase arc-earth faults of single；Wherein, described
One switch module, second switch module, the first end of third switch module access three-phase system, and the of the first switch module
Two ends ground connection；The second end of the second switch module passes through a pair of of ground resistance ground connection；The second end of the third switch module
It is grounded by a fuse；In the single single phase metal ground fault, single single phase impedance ground fault, the single-phase electric arc of single
Under any single single-phase fault state in ground fault, the low resistance controlled in arc suppression coil parallel connection low-resistance grounding device is connect
Ground resistance device carries out switching；Low resistance earthing resistor；Wherein, the duration is grounded under single single-phase fault state greater than low
The delay making time of resistance eutral grounding resistor；
Obtain single single phase metal ground fault, single single phase impedance ground fault, the single-phase arc-earth faults of single
When corresponding low resistance switching parameter, as the first test parameters；Wherein, the low resistance switching parameter includes: the low electricity
The compensation electric current and grounding point electric current of neutral point voltage-to-ground, arc suppression coil output when resistance grounding resistor is not put into, it is described
The electric current of low resistance earthing resistor when low resistance earthing resistor is put into, when the excision of low resistance earthing resistor
It carves；
When first test parameters meets preset single single phase grounding test condition, the arc suppression coil is determined simultaneously
Join low-resistance grounding device and passes through single singlephase earth fault test.
Preferably, the method also includes:
It successively controls the first switch module and second switch module carries out n times intermittence switching, between successively simulating
Having a rest property single phase metal ground fault and intermittent single phase impedance ground fault；
It is any intermittent single in the intermittent single phase metal ground fault, intermittent single phase impedance ground fault
Under phase fault state, the low resistance earthing resistor controlled in arc suppression coil parallel connection low-resistance grounding device carries out switching；
Obtain corresponding low resistance switching when intermittent single phase metal ground fault, intermittent single phase impedance ground fault
Parameter, as the second test parameters；
When second test parameters meets preset intermittent single phase grounding test condition, the arc suppression coil is determined
Low-resistance grounding device in parallel passes through intermittent singlephase earth fault test.
Preferably, the method also includes:
It controls the first switch module and carries out single switching, to simulate single single phase metal ground fault；
Under the single single phase metal ground fault, the low electricity in arc suppression coil parallel connection low-resistance grounding device is controlled
Resistance grounding resistor is not put into, to simulate low resistance investment failure；Wherein, the ground connection duration of low resistance earthing resistor is big
In the delay making time of investment low resistance earthing resistor；
Low resistance investment failure corresponding low resistance switching parameter when obtaining single single phase metal ground fault, as the
Three test parameters；
When the third test parameters meets preset low resistance investment experimental condition, determine that the arc suppression coil is in parallel
Low-resistance grounding device is unsuccessfully tested by low resistance investment.
Preferably, the method also includes:
It controls the first switch module and carries out single switching, to simulate single single phase metal ground fault；
Under the single single phase metal ground fault, the low electricity in arc suppression coil parallel connection low-resistance grounding device is controlled
Resistance grounding resistor is put into, and controls institute after the making time of the low resistance earthing resistor reaches the preset time
It states low resistance earthing resistor not exit, exits failure to simulate low resistance；Wherein, the ground connection of low resistance earthing resistor continues
Time is greater than the delay making time of investment low resistance earthing resistor；
Low resistance exits unsuccessfully corresponding low resistance switching parameter when obtaining single single phase metal ground fault, as the
Four test parameters；
When the 4th test parameters, which meets preset low resistance, exits experimental condition, determine that the arc suppression coil is in parallel
Low-resistance grounding device is exited by low resistance and is unsuccessfully tested.
Preferably, the preset single single phase grounding test condition includes:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start with arc suppression coil
Duration at the time of correspondence to grounding point electric current less than preset residual flow threshold value at the time of output compensation electric current；
When reaching delay making time section, the low resistance earthing resistor investment；Wherein, the delay making time
Section is the T after the arc suppression coil input compensation momentR-TLPeriod, TRIndicate the investment moment of the low resistance earthing resistor, TL
Indicate the arc suppression coil input compensation moment；
When reaching low resistance working time section, the low resistance earthing resistor excision；Wherein, the low resistance work
Period is that resistance puts into the T after the momentR2-TRPeriod, TR2Indicate the excision moment of the low resistance earthing resistor.
Preferably, the preset intermittent single phase grounding test condition includes:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start with arc suppression coil
Duration at the time of correspondence to grounding point electric current less than preset residual flow threshold value at the time of output compensation electric current；
Low resistance earthing resistor low resistance earthing resistor low resistance earthing resistor is thrown according to intermittence ground connection frequency M
Enter low resistance earthing resistor, and low resistance earthing resistor does not put into low resistance in preceding M-1 ground connection, is grounded at the M times
After generation, low resistance is put into, record low resistance puts into moment TR, when reaching low resistance working time section, the low resistance is connect
The excision of ground resistance device；Wherein, the low resistance working time section is that resistance puts into the T after the momentR2-TRPeriod, TR2Described in expression
The excision moment of low resistance earthing resistor.
Preferably, the preset low resistance investment experimental condition includes:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start with arc suppression coil
Duration at the time of correspondence to grounding point electric current less than preset residual flow threshold value at the time of output compensation electric current.
Preferably, the preset low resistance exits experimental condition and includes:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start with arc suppression coil
Duration at the time of correspondence to grounding point electric current less than preset residual flow threshold value at the time of output compensation electric current.
Second aspect, the embodiment of the invention provides a kind of arc suppression coil parallel connection low-resistance grounding device testing equipment, packets
It includes processor, memory and storage in the memory and is configured as the computer program executed by the processor,
The processor realizes the arc suppression coil low electricity in parallel as described in any one of first aspect when executing the computer program
Hinder earthing or grounding means test method.
The third aspect, the embodiment of the invention provides a kind of computer readable storage medium, the computer-readable storage
Medium includes the computer program of storage, wherein controls the computer-readable storage medium in computer program operation
Equipment executes the arc suppression coil parallel connection low-resistance grounding device test method as described in any one of first aspect where matter.
Compared with the existing technology, the beneficial effect of the embodiment of the present invention is:
Single singlephase earth fault is carried out to arc suppression coil parallel connection low-resistance grounding device respectively by above-mentioned test method
Test, the intermittent singlephase earth fault test of simulation, unsuccessfully test, low resistance are exited and are unsuccessfully tested low resistance investment, on the one hand
The reliability of arc suppression coil parallel connection low-resistance grounding device can be effectively verified, arc suppression coil parallel connection on the other hand can also be verified
The integrality of low-resistance grounding device, so that the Supply Security and reliability of power distribution network be greatly improved.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is simulation singlephase earth fault test circuit diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of arc suppression coil parallel connection low-resistance grounding device provided in an embodiment of the present invention；
Fig. 3 is the flow chart of arc suppression coil parallel connection low-resistance grounding device test method provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of arc suppression coil parallel connection low-resistance grounding device testing equipment provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, simulation singlephase earth fault test circuit includes three-phase system power supply U, arc suppression coil low electricity in parallel
Earthing or grounding means ASCPLR, the three-phase condenser bank C of the direct-to-ground capacitance for simulating three-phase system are hindered, first switch module k1, the
Two switch module k2 and third switch module k3；The arc suppression coil parallel connection low-resistance grounding device and three-phase system electricity
Source U tri- is connected；The three-phase condenser bank C is connected with the three-phase system power supply U tri-；The first switch module k1,
Second switch module K2, third switch module K3 first end access on a phase line of the three-phase system power supply U, described
The second end of one switch module k1 is grounded；The second end of the second switch module k2 and the first end of direct-to-ground capacitance resistance R1 connect
It connects, the second end ground connection of direct-to-ground capacitance resistance R1；The second end of the third switch module k3 is connect with the first end of fuse D,
The second end of the fuse is grounded.Wherein, the air gap the two poles of the earth are shorted by fuse D, and the two poles of the earth of the air gap are made of metal wire.
In embodiments of the present invention, the three-phase system power supply U is for simulating electric power three-phase system, the three-phase capacitor
Group includes the first capacitor to connect one to one respectively with three-phase system power supply U three-phase line, the second capacitor, third electricity
Hold, for simulating the direct-to-ground capacitance of electric power three-phase system；Single phase metal ground connection event is simulated by closure first switch module K1
Barrier simulates single phase impedance ground fault by closure second switch module K2, is simulated by closure third switch module K3 single-phase
Arc-earth faults.
As shown in Fig. 2, the arc suppression coil parallel connection low-resistance grounding device, comprising: arc suppression coil device L, ground connection transformation
Device 1, low resistance earthing resistor R, low resistance fling-cut switch K and controller 2；The three-phase input end of the grounding transformer 1
For accessing power grid, the output end of the grounding transformer 1 and the input terminal of the arc suppression coil device L, the low resistance are thrown
Cut the first end connection closed；The first end of the second end of the low resistance fling-cut switch and the low resistance earthing resistor R
Connection；The second end ground connection of the output end of the arc suppression coil device L, the low resistance earthing resistor R；The controller 2
It is connect with the control terminal of the low resistance fling-cut switch, fault point transition resistance and transition resistance control, and root for identification
The throwing of the low resistance earthing resistor R is controlled according to the fault point transition resistance and the critical transition resistance, is cut.
The grounding transformer 1 be the wiring of Y type three-winding transformer, wherein the neutral point of the grounding transformer 1 with
The input terminal of the arc suppression coil device L connects.
The arc suppression coil parallel connection low-resistance grounding device further includes the first voltage mutual inductor connecting with the controller 2
(not identified in figure), second voltage mutual inductor (not identified in figure)；The first voltage mutual inductor is used for accessing power grid bus
In the phase voltage of measurement singlephase earth fault phase；The second voltage mutual inductor connect neutral point in the grounding transformer 1 with
Between the input terminal of the arc suppression coil device L, for detecting the neutral point voltage-to-ground of the grounding transformer 1；First electricity
Current transformer, for measuring grounding point electric current.
The arc suppression coil parallel connection low-resistance grounding device further includes the current transformer (figure connecting with the controller 2
In do not identify), the current transformer be connected to the arc suppression coil device L branch road, for detecting the arc suppression coil
Compensation electric current when device L is compensated.
The arc suppression coil parallel connection low-resistance grounding device further includes the display module that connect with the controller 2 (in figure
Do not identify), for showing fault point transition resistance monitoring result.
The present apparatus, if failure is not eliminated after low resistance is put into for the first time, disappears after singlephase earth fault generation subsequent
In arc coil compensation process, device decides whether to put into low resistance again according to fault point transition resistance monitoring result, Jin Ershi
Existing failure Dynamic Recognition be isolated.The working principle of the arc suppression coil parallel connection low-resistance grounding device is as follows:
Neutral point is through grounding through arc state when normal operation；When singlephase earth fault occurs, arc suppression coil is in short-term
Compensation is to eliminate transient fault；If ground fault does not disappear after compensating in short-term or multiple wink occurs to period for system monitoring
When property ground fault puts into low resistance earthing resistor R after certain time-delay to increase grounding point fault current, and enhancing relay is protected
The sensitivity of shield.It puts into after low resistance earthing resistor R after a certain period of time, exits low resistance earthing resistor R；If failure does not disappear
It losing, then arc suppression coil continues to compensate certain time (general < 2h), during this period, the arc suppression coil parallel connection low resistance earthing dress
It sets while startup separator point transition resistance monitors identification function, fault point transition resistance is less than or equal to critical transition if monitoring
Resistance, then investment low resistance earthing resistor R is no to increase the triggering protective relaying device movement of fault point earth current again
Then, continue to keep arc suppression coil compensation state；If failure vanishes, arc suppression coil compensation state is exited.
Referring to Fig. 3, first embodiment of the invention provides a kind of arc suppression coil parallel connection low-resistance grounding device test side
Method, comprising the following steps:
S11: first switch module, second switch module and third switch module are successively controlled and carries out n times switching, with successively
Simulate single single phase metal ground fault, single single phase impedance ground fault and the single-phase arc-earth faults of single；Wherein, institute
State first switch module, second switch module, the first end of third switch module access three-phase system, the first switch module
Second end ground connection；The second end of the second switch module passes through a pair of of ground resistance ground connection；The of the third switch module
Two ends are grounded by a fuse；It is single-phase in the single single phase metal ground fault, single single phase impedance ground fault, single
Under any single single-phase fault state in arc-earth faults, the low electricity in arc suppression coil parallel connection low-resistance grounding device is controlled
It hinders grounding resistor and carries out switching；Wherein, the ground connection duration should be greater than low resistance earthing electricity under single single-phase fault state
Hinder the delay making time of device.
S12: single single phase metal ground fault, single single phase impedance ground fault, the single-phase arcing ground of single are obtained
Corresponding low resistance switching parameter when failure, as the first test parameters；Wherein, the low resistance switching parameter includes: described
The compensation electric current and grounding point electric current of neutral point voltage-to-ground, arc suppression coil output when low resistance earthing resistor is not put into,
The electric current of the low resistance earthing resistor when low resistance earthing resistor is put into, the excision of low resistance earthing resistor
Moment；
S13: when first test parameters meets preset single single phase grounding test condition, the arc blowout wire is determined
It encloses low-resistance grounding device in parallel and passes through single singlephase earth fault test.
Further, the preset single single phase grounding test condition includes:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start with arc suppression coil
Duration at the time of correspondence to grounding point electric current less than preset residual flow threshold value at the time of output compensation electric current；
When reaching in delay making time section, the low resistance earthing resistor investment；Wherein, when the delay is put into
Between section be the arc suppression coil input compensation moment after TR-TLPeriod, TRIndicate the investment moment of the low resistance earthing resistor,
TLIndicate the arc suppression coil input compensation moment；
When reaching low resistance mute time section, the low resistance earthing resistor excision；Wherein, the low resistance excision
Period is that resistance cuts off the T after the momentR2-TRPeriod, TR2Indicate the excision moment of the low resistance earthing resistor.
In embodiments of the present invention, N is not less than 5.It is equal to nominal voltage of a system, system capacitive current equal to arc blowout wire in U
Enclose nominal current conditions under using switching K1, K2, K3 carry out single phase grounding test and by arc suppression coil device set tuning-off degree (or
Compensating coefficient and maximum residual flow), every kind of condition test is repeated 5 times.When low resistance earthing resistor is not put into, during investment,
When excision, compensation electric current and grounding point that record neutral point voltage-to-ground (i.e. arc suppression coil both end voltage), arc suppression coil export
The parameters such as electric current and the corresponding waveform diagram of generation determine that residual flow is steady according to the waveform of the waveform diagram of compensation electric current and grounding point electric current
It fixes time, residual flow size (taking maximum value in each secondary test for ground) and arc suppression coil input compensation moment.
It is required that 1: neutral point voltage-to-ground (i.e. arc suppression coil both end voltage) is device starting voltage, which can be according to being
System requires setting.Under normal conditions, generally 20%~35%Un (Un be nominal voltage of a system divided by).Every time when test,
By the waveform diagram of the neutral point voltage-to-ground of test record, whether judgment means normally start when reaching starting voltage.
It is required that 2: residual flow stablize the time be system occur single-phase earthing start time to residual flow less than device setting value when
Between be spaced, compensation performance of the parameter for arc suppression coil in checking device.Statistical method when test every time are as follows: record ground connection
Device detects time interval Δ T1 needed for being grounded and being adjusted to the compensating coefficient of arc suppression coil setting after generation；Secondly, note
Recording device starts transit time Δ T2 needed for output compensation electric current is less than setting value to residual flow under the compensating coefficient of setting.Then
Δ T1 and Δ T2's and stablize the time for residual flow.Every time when test, the residual flow stable time should be less than preset time threshold.It is preferred that
Ground, preset time threshold are 200ms.
It is required that 3: grounding point size of current when the big little finger of toe arc suppression coil of residual flow stablizes compensation, the parameter is in checking device
The compensation performance of arc suppression coil.Every time when test, residual flow size should be less than preset residual flow threshold value (being traditionally arranged to be 10A),
If testing obtained residual flow determines residual flow threshold value greater than preset, judge that test does not pass through, otherwise test passes through.
It is required that 4: according to the waveform diagram of the electric current of low resistance earthing resistor, it may be determined that low resistance puts into moment TR。TR-TL
For low resistance delay making time, which can be set by device, generally between 3~10 seconds.It is put into arc suppression coil
Compensate (the T after the momentR-TL) moment, low resistance earthing resistor should be put into, if reaching (TR-TL) do not put into, then it tests not
Pass through, otherwise test passes through.Wherein, at the time of the arc suppression coil input compensation moment is that arc suppression coil starts output compensation electric current
TL passes through the waveform diagram for the compensation electric current that arc suppression coil exports, it may be determined that the moment.
It is required that 5: after the excision of low resistance earthing resistor, low resistance time of devoting oneself to work is generally 2~3 seconds, the parameter
It is settable.According to the waveform diagram of the electric current of low resistance earthing resistor, it may be determined that low resistance cuts off moment TR2, then low electricity can be obtained
Hindering mute time section is TR2-TR.When low resistance is cut off after reaching low resistance mute time section, then test passes through, otherwise obstructed
It crosses.
When the single single phase metal ground fault in step S11-13, single single phase impedance ground fault, single are single-phase
Arc-earth faults test is when being all satisfied above-mentioned requirements 1-5, then it is assumed that device has passed through test, can be with by above-mentioned test method
Effectively verifying arc suppression coil parallel connection low-resistance grounding device reliability, thus be greatly improved power distribution network Supply Security and can
By property.
In an alternative embodiment, the method also includes:
It successively controls the first switch module and second switch module carries out n times intermittence switching, between successively simulating
Having a rest property single phase metal ground fault and intermittent single phase impedance ground fault；
It is any intermittent single in the intermittent single phase metal ground fault, intermittent single phase impedance ground fault
Under phase fault state, the low resistance earthing resistor controlled in arc suppression coil parallel connection low-resistance grounding device carries out switching；
Obtain corresponding low resistance switching when intermittent single phase metal ground fault, intermittent single phase impedance ground fault
Parameter, as the second test parameters；
When second test parameters meets preset intermittent single phase grounding test condition, the arc suppression coil is determined
Low-resistance grounding device in parallel passes through intermittent singlephase earth fault test.
Further, the preset intermittent single phase grounding test condition includes:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start with arc suppression coil
Duration at the time of correspondence to grounding point electric current less than preset residual flow threshold value at the time of output compensation electric current；
Low resistance earthing resistor low resistance earthing resistor low resistance earthing resistor is thrown according to intermittence ground connection frequency M
Enter low resistance earthing resistor, and low resistance earthing resistor does not put into low resistance in preceding M-1 ground connection, is grounded at the M times
After generation, low resistance is put into, record low resistance puts into moment TR, when reaching low resistance working time section, the low resistance is connect
The excision of ground resistance device；Wherein, the low resistance working time section is that resistance puts into the T after the momentR2-TRPeriod, TR2Described in expression
The excision moment of low resistance earthing resistor.
It is required that 6: low resistance earthing resistor puts into low resistance earthing resistor, and low electricity according to intermittence ground connection frequency M
Grounding resistor is hindered in preceding M-1 ground connection, does not put into low resistance, after the M times ground connection occurs, puts into low resistance.
In embodiments of the present invention, low resistance earthing resistor should put into low resistance earthing according to intermittence ground connection frequency M
Resistor (rather than according to require 5 investments), low resistance earthing resistor should not be acted in preceding M-1 ground connection at this time, in M
After secondary ground connection occurs, device should act immediately, put into low resistance
Preset intermittent the illustrating for single phase grounding test condition refers to above-mentioned requirements 1-3,5 and 6, again
No longer it is described in detail.
In embodiments of the present invention, intermittent single phase grounding test is carried out with the method for quickly throwing, cutting earthing switch k1, K2
(carrying out under metallic earthing, impedance earth two states respectively) should be grounded (N >=3) and every two at least N+2 times in the process
1s is not to be exceeded in secondary interval, and the single ground connection duration should be less than the delay making time of low resistance earthing resistor.Test
Loop damping rate answers≤3%；Test voltage U be not lower than 20%Un (Un be system line voltage divided byAnd it can guarantee at this
When voltage Imitating is grounded, device can normally start.Neutral point voltage-to-ground (i.e. arc suppression coil both ends in record test overall process
Voltage), arc suppression coil output electric current, grounding point electric current, low resistance electric current, low resistance investment moment and investment duration etc. number
According to.Determine whether device exports compensation electric current, ground fault interim device when ground fault occurs by the waveform recorded
Whether exit compensation and series resonance phenomenon whether occurs.Arc suppression coil should be able to continuously in each ground connection, output compensation be electric
Stream, and compensation can exited per ground connection interim twice, series resonance phenomenon does not occur.
In an alternative embodiment, the method also includes:
It controls the first switch module and carries out single switching, with single single phase metal ground fault；
Under the single single phase metal ground fault, the low electricity in arc suppression coil parallel connection low-resistance grounding device is controlled
Resistance grounding resistor is not put into, to simulate low resistance investment failure；Wherein, the ground connection duration is greater than investment low resistance earthing electricity
Hinder the setting time of device；
Low resistance investment loses corresponding low resistance switching parameter when obtaining single single phase metal ground fault, as third
Test parameters；
When the third test parameters meets preset low resistance investment experimental condition, determine that the arc suppression coil is in parallel
Low-resistance grounding device is unsuccessfully tested by low resistance investment.
Further, the preset low resistance investment experimental condition includes:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start with arc suppression coil
Duration at the time of correspondence to grounding point electric current less than preset residual flow threshold value at the time of output compensation electric current.
Preset the illustrating for experimental condition of low resistance investment refers to above-mentioned requirements 1-3, again no longer in detail
Explanation.
In embodiments of the present invention, by quickly throw, cut earthing switch k1 method carry out single single phase grounding test (
It is carried out under metallic earthing state).The ground connection duration should be greater than putting into low-resistance setting time, to guarantee that triggering investment is low
The condition of resistance.It controls low resistance by controller when test not put into, low resistance investment is lost when simulating singlephase earth fault
It loses.At this point, arc suppression coil parallel connection low-resistance grounding device should meet the requirements 1~3, in addition, device should also be according to fault condition control
Arc suppression coil operating status processed simultaneously issues alarm.
In an alternative embodiment, the method also includes:
It controls the first switch module and carries out single switching, to simulate single single phase metal ground fault；
Under the single single phase metal ground fault, the low electricity in arc suppression coil parallel connection low-resistance grounding device is controlled
Resistance grounding resistor is put into, and controls institute after the making time of the low resistance earthing resistor reaches the preset time
It states low resistance earthing resistor not exit, exits failure to simulate low resistance；Wherein, the ground connection of low resistance earthing resistor continues
Time is greater than the delay making time of investment low resistance earthing resistor；；
Low resistance exits unsuccessfully corresponding low resistance switching parameter when obtaining single single phase metal ground fault, as the
Four test parameters；
When the 4th test parameters, which meets preset low resistance, exits experimental condition, determine that the arc suppression coil is in parallel
Low-resistance grounding device is exited by low resistance and is unsuccessfully tested.
Further, the preset low resistance exits experimental condition and includes:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start with arc suppression coil
Duration at the time of correspondence to grounding point electric current less than preset residual flow threshold value at the time of output compensation electric current.
The preset low resistance exits illustrating for experimental condition and refers to above-mentioned requirements 1-3, again no longer in detail
Explanation.
In embodiments of the present invention, by quickly throw, cut earthing switch k1 method carry out single single phase grounding test (
It is carried out under metallic earthing state).The ground connection duration should be greater than putting into low-resistance setting time, to guarantee that triggering investment is low
The condition of resistance.After low resistance puts into and is more than setting time, low resistance is controlled by controller and is not exited, to simulate single-phase connect
Low resistance exits failure when earth fault.At this point, arc suppression coil parallel connection low-resistance grounding device should meet the requirements 1~3, in addition, dress
Arc suppression coil operating status should also be controlled according to fault condition and issue alarm by setting.
Compared with the existing technology, the embodiment of the present invention has beneficial effect to be:
Single singlephase earth fault is carried out to arc suppression coil parallel connection low-resistance grounding device respectively by above-mentioned test method
Test, the intermittent singlephase earth fault test of simulation, unsuccessfully test, low resistance are exited and are unsuccessfully tested low resistance investment, on the one hand
The reliability of arc suppression coil parallel connection low-resistance grounding device can be effectively verified, arc suppression coil parallel connection on the other hand can also be verified
The integrality of low-resistance grounding device, so that the Supply Security and reliability of power distribution network be greatly improved.
It referring to fig. 4, is the arc suppression coil parallel connection low-resistance grounding device testing equipment of second embodiment of the invention offer
Schematic diagram.As shown in figure 4, the arc suppression coil parallel connection low-resistance grounding device testing equipment includes: at least one processor 11, example
Such as CPU, at least one network interface 14 or other users interface 13, memory 15, at least one communication bus 12, communication is always
Line 12 is for realizing the connection communication between these components.Wherein, user interface 13 optionally may include USB interface and its
His standard interface, wireline interface.Network interface 14 optionally may include Wi-Fi interface and other wireless interfaces.Memory
15 may include high speed RAM memory, it is also possible to and it further include non-labile memory (non-volatilememory), such as
At least one magnetic disk storage.Memory 15 optionally may include at least one storage dress for being located remotely from aforementioned processor 11
It sets.
In some embodiments, memory 15 stores following element, executable modules or data structures, or
Their subset or their superset:
Operating system 151 includes various system programs, for realizing various basic businesses and hardware based of processing
Business；
Program 152.
Specifically, processor 11 executes and disappears described in above-described embodiment for calling the program 152 stored in memory 15
Arc coil parallel connection low-resistance grounding device test method, such as step S11 shown in FIG. 1.Alternatively, described in the processor execution
Step in above-mentioned each method embodiment is realized when computer program.
Illustratively, the computer program can be divided into one or more module/units, one or more
A module/unit is stored in the memory, and is executed by the processor, to complete the present invention.It is one or more
A module/unit can be the series of computation machine program instruction section that can complete specific function, and the instruction segment is for describing institute
State implementation procedure of the computer program in the arc suppression coil parallel connection low-resistance grounding device testing equipment.
The arc suppression coil parallel connection low-resistance grounding device testing equipment can be desktop PC, notebook, palm
Computer and cloud server etc. calculate equipment.The arc suppression coil parallel connection low-resistance grounding device testing equipment may include, but not
It is only limitted to, processor, memory.It will be understood by those skilled in the art that the schematic diagram is only arc suppression coil low electricity in parallel
The example for hindering earthing or grounding means testing equipment, does not constitute the restriction to arc suppression coil parallel connection low-resistance grounding device testing equipment,
It may include perhaps combining certain components or different components than illustrating more or fewer components.
Alleged processor 11 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng the processor 11 is the control centre of the arc suppression coil parallel connection low-resistance grounding device testing equipment, is connect using various
The various pieces of mouth and the entire arc suppression coil parallel connection low-resistance grounding device testing equipment of connection.
The memory 15 can be used for storing the computer program and/or module, the processor 11 by operation or
Computer program and/or the module stored in the memory is executed, and calls the data being stored in memory, is realized
The various functions of the arc suppression coil parallel connection low-resistance grounding device testing equipment.The memory 15 can mainly include storage journey
Sequence area and storage data area, wherein storing program area can the (ratio of application program needed for storage program area, at least one function
Such as sound-playing function, image player function) etc.；Storage data area, which can be stored, uses created data according to mobile phone
(such as audio data, phone directory etc.) etc..In addition, memory 15 may include high-speed random access memory, can also include
Nonvolatile memory, such as hard disk, memory, plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), safety
Digital (Secure Digital, SD) card, flash card (Flash Card), at least one disk memory, flush memory device or
Other volatile solid-state parts.
Wherein, if the integrated module/unit of the arc suppression coil parallel connection low-resistance grounding device testing equipment is with software
The form of functional unit is realized and when sold or used as an independent product, can store in a computer-readable storage
In medium.Based on this understanding, the present invention realizes all or part of the process in above-described embodiment method, can also pass through meter
Calculation machine program is completed to instruct relevant hardware, and the computer program can be stored in a computer readable storage medium
In, the computer program is when being executed by processor, it can be achieved that the step of above-mentioned each embodiment of the method.Wherein, the calculating
Machine program includes computer program code, and the computer program code can be source code form, object identification code form, can hold
Style of writing part or certain intermediate forms etc..The computer-readable medium may include: that can carry the computer program code
Any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic disk, CD, computer storage, read-only memory (ROM,
Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunications letter
Number and software distribution medium etc..It should be noted that the content that the computer-readable medium includes can be managed according to the administration of justice
Local legislation and the requirement of patent practice carry out increase and decrease appropriate, such as in certain jurisdictions, according to legislation and patent
Practice, computer-readable medium does not include electric carrier signal and telecommunication signal.
Third implementation of the present invention additionally provides a kind of computer readable storage medium, the computer readable storage medium packet
Include the computer program of storage, wherein where controlling the computer readable storage medium in computer program operation
Equipment executes the arc suppression coil parallel connection low-resistance grounding device test method as described in any one of above-mentioned.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of arc suppression coil parallel connection low-resistance grounding device test method, which comprises the following steps:
It successively controls first switch module, second switch module and third switch module and carries out n times switching, successively to simulate single
Single phase metal ground fault, single single phase impedance ground fault and the single-phase arc-earth faults of single；Wherein, it described first opens
It closes module, second switch module, the first end of third switch module and accesses three-phase system, the second end of the first switch module
Ground connection；The second end of the second switch module passes through a pair of of ground resistance ground connection；The second end of the third switch module passes through
One fuse ground connection；In the single single phase metal ground fault, single single phase impedance ground fault, the single-phase arcing ground of single
Under any single single-phase fault state in failure, the low resistance earthing electricity in arc suppression coil parallel connection low-resistance grounding device is controlled
It hinders device and carries out switching；Low resistance earthing resistor；Wherein, the duration is grounded under single single-phase fault state greater than low resistance
The delay making time of grounding resistor；
When obtaining the single-phase arc-earth faults of single single phase metal ground fault, single single phase impedance ground fault, single pair
The low resistance switching parameter answered, as the first test parameters；Wherein, the low resistance switching parameter includes: that the low resistance connects
The compensation electric current and grounding point electric current of neutral point voltage-to-ground, arc suppression coil output when ground resistance device is not put into, the low electricity
Hinder the electric current of low resistance earthing resistor when grounding resistor is put into, the excision moment of low resistance earthing resistor；
When first test parameters meets preset single single phase grounding test condition, determine that the arc suppression coil parallel connection is low
Electric resistance earthing device passes through single singlephase earth fault test.
2. arc suppression coil parallel connection low-resistance grounding device test method as described in claim 1, which is characterized in that the method
Further include:
It successively controls the first switch module and second switch module carries out n times intermittence switching, successively to simulate intermittence
Single phase metal ground fault and intermittent single phase impedance ground fault；
The single-phase event of any intermittence in the intermittent single phase metal ground fault, intermittent single phase impedance ground fault
Under barrier state, the low resistance earthing resistor controlled in arc suppression coil parallel connection low-resistance grounding device carries out switching；
Obtain corresponding low resistance switching ginseng when intermittent single phase metal ground fault, intermittent single phase impedance ground fault
Number, as the second test parameters；
When second test parameters meets preset intermittent single phase grounding test condition, determine that the arc suppression coil is in parallel
Low-resistance grounding device passes through intermittent singlephase earth fault test.
3. arc suppression coil parallel connection low-resistance grounding device test method as claimed in claim 2, which is characterized in that the method
Further include:
It controls the first switch module and carries out single switching, to simulate single single phase metal ground fault；
Under the single single phase metal ground fault, the low resistance controlled in arc suppression coil parallel connection low-resistance grounding device is connect
Ground resistance device is not put into, to simulate low resistance investment failure；Wherein, the ground connection duration of low resistance earthing resistor, which is greater than, throws
Enter the delay making time of low resistance earthing resistor；
The corresponding low resistance switching parameter of low resistance investment failure, is tried as third when obtaining single single phase metal ground fault
Test parameter；
When the third test parameters meets preset low resistance investment experimental condition, the arc suppression coil low electricity in parallel is determined
Resistance earthing or grounding means is unsuccessfully tested by low resistance investment.
4. arc suppression coil parallel connection low-resistance grounding device test method as claimed in claim 3, which is characterized in that the method
Further include:
It controls the first switch module and carries out single switching, to simulate single single phase metal ground fault；
Under the single single phase metal ground fault, the low resistance controlled in arc suppression coil parallel connection low-resistance grounding device is connect
Ground resistance device is put into, and is controlled after the making time of the low resistance earthing resistor reaches the preset time described low
Resistance eutral grounding resistor does not exit, and exits failure to simulate low resistance；Wherein, the ground connection duration of low resistance earthing resistor
Greater than the delay making time of investment low resistance earthing resistor；
Low resistance exits unsuccessfully corresponding low resistance switching parameter when obtaining single single phase metal ground fault, as the 4th examination
Test parameter；
When the 4th test parameters, which meets preset low resistance, exits experimental condition, the arc suppression coil low electricity in parallel is determined
Resistance earthing or grounding means is exited by low resistance unsuccessfully to be tested.
5. arc suppression coil parallel connection low-resistance grounding device test method as described in claim 1, which is characterized in that described default
Single single phase grounding test condition include:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start to export with arc suppression coil
It is less than duration at the time of preset residual flow threshold value corresponds to grounding point electric current at the time of compensating electric current；
When reaching delay making time section, the low resistance earthing resistor investment；Wherein, the delay making time section is
T after the arc suppression coil input compensation momentR-TLPeriod, TRIndicate the investment moment of the low resistance earthing resistor, TLIt indicates
The arc suppression coil input compensation moment；
When reaching low resistance working time section, the low resistance earthing resistor excision；Wherein, the low resistance working time
Section is that resistance puts into the T after the momentR2-TRPeriod, TR2Indicate the excision moment of the low resistance earthing resistor.
6. arc suppression coil parallel connection low-resistance grounding device test method as claimed in claim 2, which is characterized in that described default
Intermittent single phase grounding test condition include:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start to export with arc suppression coil
It is less than duration at the time of preset residual flow threshold value corresponds to grounding point electric current at the time of compensating electric current；
Low resistance earthing resistor low resistance earthing resistor low resistance earthing resistor is low according to intermittence ground connection frequency M investment
Resistance eutral grounding resistor, and low resistance earthing resistor does not put into low resistance in preceding M-1 ground connection, occurs in the M times ground connection
Afterwards, low resistance is put into, record low resistance puts into moment TR, when reaching low resistance working time section, the low resistance earthing electricity
Hinder device excision；Wherein, the low resistance working time section is that resistance puts into the T after the momentR2-TRPeriod, TR2Indicate the low electricity
Hinder the excision moment of grounding resistor.
7. arc suppression coil parallel connection low-resistance grounding device test method as claimed in claim 3, which is characterized in that described default
Low resistance investment experimental condition include:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start to export with arc suppression coil
It is less than duration at the time of preset residual flow threshold value corresponds to grounding point electric current at the time of compensating electric current.
8. arc suppression coil parallel connection low-resistance grounding device test method as claimed in claim 4, which is characterized in that described default
Low resistance exit experimental condition and include:
Neutral point voltage-to-ground is greater than preset starting voltage；
Grounding point electric current after arc suppression coil compensation is less than preset residual flow threshold value；
Residual flow stablizes the time less than preset time threshold；Wherein, the residual flow stablizes the time to start to export with arc suppression coil
It is less than duration at the time of preset residual flow threshold value corresponds to grounding point electric current at the time of compensating electric current.
9. a kind of arc suppression coil parallel connection low-resistance grounding device testing equipment, which is characterized in that including processor, memory and
The computer program executed by the processor is stored in the memory and is configured as, the processor executes the meter
Arc suppression coil parallel connection low-resistance grounding device test side as claimed in any of claims 1 to 8 in one of claims is realized when calculation machine program
Method.
10. a kind of computer readable storage medium, which is characterized in that the computer readable storage medium includes the calculating of storage
Machine program, wherein equipment where controlling the computer readable storage medium in computer program operation is executed as weighed
Benefit require any one of 1 to 8 described in arc suppression coil parallel connection low-resistance grounding device test method.
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| CN113848521A (en) * | 2020-06-28 | 2021-12-28 | 李景禄 | Automatic tracking arc suppression coil field checking and fault handling test method |
| CN114156855A (en) * | 2021-12-08 | 2022-03-08 | 国网辽宁省电力有限公司朝阳供电公司 | Dynamic full-compensation arc suppression coil for power distribution network grounding residual current and input and exit method thereof |
| CN114280415A (en) * | 2021-12-14 | 2022-04-05 | 国网江苏省电力有限公司常州供电分公司 | Power distribution network ground fault processing method based on parallel resistors of arc suppression coils |
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