CN108761231A - A kind of the intelligent checking method and instrument of automatic arc-suppressing device and line-selected earthing device - Google Patents
A kind of the intelligent checking method and instrument of automatic arc-suppressing device and line-selected earthing device Download PDFInfo
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- CN108761231A CN108761231A CN201810492203.5A CN201810492203A CN108761231A CN 108761231 A CN108761231 A CN 108761231A CN 201810492203 A CN201810492203 A CN 201810492203A CN 108761231 A CN108761231 A CN 108761231A
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- automatic arc
- capacitance
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- suppressing device
- current
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Abstract
A kind of the intelligent checking method and instrument of automatic arc-suppressing device and line-selected earthing device, two second part of automatic arc-suppressing device or line-selected earthing device and electric characteristic amount output end are connected, it is different capacitances by adjusting capacitance module, checks automatic arc-suppressing device and the measurement accuracy of electric network capacitance and current, the output of compensation electric current are controlled with residual flow；It by adjusting the dynamic change of capacitance module, is allowed to be equivalent to the variation of power system operating mode, changes simultaneously the variation of corresponding neutral point displacement voltage, check automatic tracking function of the automatic arc-suppressing device to power system operating mode；It is different current values by adjusting electrical quantity conversion module, the high resistance earthing fault of simulating grid, low-impedance earthed system failure, change the throughput time of electric current, the instantaneity earth fault and permanent earth fault of simulating grid check the handling result of automatic arc-suppressing device and line-selected earthing device to failure.
Description
Technical field
The present invention is the on-site calibrating method and instrument of power network neutral point earthing or grounding means, is mainly used for power distribution network and disappears automatically
The live function check of arc device and line-selected earthing device.
Background technology
Power distribution network automatic arc-suppressing device and line-selected earthing device are using very more products, and this kind of product exists.To this kind of
The experiment of product be usually some functional trials can be done in plant laboratory, once but these products be installed to scene,
Functional trial cannot be done to this kind of product due to lacking due research technique, some insulation and spy only are done to the component of product
Property pilot project, and to the measurement accuracy of automatic arc-suppressing device, the adjustment of compensation electric current, residual flow control, automatic tracking function and connect
Whether ground line selection apparatus route selection correctly lacks necessary verification experimental verification.And power distribution network automatic arc-suppressing device and line-selected earthing device peace
After being attached to scene, or after running to some cycles due to transporting, install and the original of electronic component operating point drift
The logic function of cause, device can change, and What is more, and secondary circuit can cause power network neutral point to connect due to wrong line
Ground device can not work.These be all be directed at automatic arc-suppressing device and line-selected earthing device cannot play a role well it is main
Reason so that causing current automatic arc-suppressing device and line-selected earthing device that cannot play due effect, or even causes the accident,
Thus develop it is a kind of be suitable for automatic arc-suppressing device and line-selected earthing device carry out on-site calibrating method and instrument application in
Field-checking is very important.
Invention content
In view of the above-mentioned problems, having invented a kind of the intelligent checking method and instrument of automatic arc-suppressing device and line-selected earthing device
Device, instrument is by electrical quantity conversion module（1）, capacitance adjust module（2）, computer processing module（3）With feeder line zero-sequence current, three
The electric characteristic amounts output end such as phase voltage and neutral point voltage（4）It constitutes, it is characterised in that：By automatic arc-suppressing device or ground connection choosing
Two second part of line apparatus and electric characteristic amount output end（4）It is connected, by adjusting capacitance module（2）For different capacitances
Value is allowed to be equivalent to the capacitance current value of power grid primary side, checks measurement accuracy of the automatic arc-suppressing device to electric network capacitance and current,
And the compensation electric current output for checking automatic arc-suppressing device is controlled with residual flow；By adjusting capacitance module（2）In certain capacitance current value
When dynamic change, be allowed to cause the capacitance current of power grid to change when being equivalent to power grid primary side throwing, retreating circuit, while according to electricity
The variation of neutral point of electric network displacement voltage adjusts corresponding neutral point displacement voltage caused by the capacitance current variation of net, checks certainly
Automatic tracking function of the dynamic arc-extinction device to power system operating mode；By adjusting electrical quantity conversion module（1）It is injected in certain feeder line
Different current values, the high resistance earthing fault of simulating grid, low-impedance earthed system failure, the earthing wire-selecting for checking line-selected earthing device are accurate
True property；By adjusting electrical quantity conversion module（1）In certain feeder line Injection Current, change the throughput time of electric current, simulating grid
The handling result of instantaneity earth fault and permanent earth fault, automatic arc-suppressing device and line-selected earthing device to failure.
Present invention tool has the advantage that：
1, the method that the present invention takes low-voltage simulation, by the capacitance current of power grid, three-phase voltage, residual voltage and feeder line zero sequence electricity
The high-voltage electrical apparatus amounts such as stream are converted to low-voltage electrical amount by the no-load voltage ratio of voltage, current sensor and are integrated in an instrument internal, operate
It is convenient, easy to remove, it can conveniently be applied to field adjustable, accurate quick.
2, the instrument of research and development that the present invention develops is by the capacitance current of power grid, three-phase voltage, residual voltage and feeder line zero sequence
The high-voltage electrical apparatus such as electric current amount is converted to the electric characteristic of low tension tolerance and true power distribution network by the no-load voltage ratio of voltage, current sensor
Measurer has preferable equivalence.
3, the present invention solves power distribution network automatic arc-suppressing device and line-selected earthing device always using the method for low-voltage simulation
Lack the problem of live function check.
Description of the drawings
Fig. 1 is the function structure chart of instrument of the present invention.
Specific implementation mode
A kind of the intelligent checking method and instrument of automatic arc-suppressing device and line-selected earthing device, instrument is by electrical quantity modulus of conversion
Block（1）, capacitance adjust module（2）, computer processing module（3）With feeder line zero-sequence current, three-phase voltage and neutral point voltage etc.
Electric characteristic amount output end（4）It constitutes, it is characterised in that：By two second part of automatic arc-suppressing device or line-selected earthing device and electricity
Gas characteristic quantity output end（4）It is connected, by adjusting capacitance module（2）For different capacitances, it is allowed to be equivalent to power grid primary
The capacitance current value of side checks measurement accuracy of the automatic arc-suppressing device to electric network capacitance and current, and checks automatic arc-suppressing device
Electric current output is compensated to control with residual flow；By adjusting capacitance module（2）Dynamic change in certain capacitance current value, is allowed to equivalent
Cause the capacitance current of power grid to change when power grid primary side throwing, retreating circuit, while being caused according to the variation of the capacitance current of power grid
The variation of neutral point of electric network displacement voltage adjust corresponding neutral point displacement voltage, check automatic arc-suppressing device to operation of power networks
The automatic tracking function of mode；By adjusting electrical quantity conversion module（1）Different current values, simulating grid are injected in certain feeder line
High resistance earthing fault, low-impedance earthed system failure, he checks the earthing wire-selecting accuracy of line-selected earthing device；By adjusting electrical quantitative change
Change the mold block（1）In certain feeder line Injection Current, change the throughput time of electric current, the instantaneity earth fault of simulating grid and permanent
The handling result of earth fault, automatic arc-suppressing device and line-selected earthing device to failure.
Electrical quantity conversion module（1）Method by changing each loop current value simulates high resistance earthing fault and low-impedance earthed system
Failure；Method by changing the throughput time of each loop current simulates instantaneity earth fault and permanent earth fault.
Emulation mode characteristic quantity and its variation that power distribution network is inputted to power distribution network automatic blowout coil, examine automatic arc extinguishing line
Enclose to capacitance current of distribution network measurement accuracy, adjust sense correctness, to power system operating mode limit track correctness and residual flow control
Correctness；The simulated failure characteristic quantity of permanent earth fault, instantaneity earth fault and the complex grounding fault with interruption is inputted to verify
The logic function and wiring correctness of power distribution network automatic blowout coil.
Capacitance adjusts module（2）For adjustable equal with automatic arc-suppressing device voltage transformer secondary side voltage of voltage class
Capacitor forms, and capacitance is equivalent to value when power-to-ground capacitance is converted to secondary side voltage.
When checking automatic tracking function of the automatic arc-suppressing device to power system operating mode, in adjustment capacitance module（2）Electricity
When the capacitance current of power grid being caused to change when dynamic change simulating grid primary side throwing, retreating circuit when capacitance current value, while root
The variation of neutral point of electric network displacement voltage is caused to adjust neutral point displacement voltage value according to the change of capacitance current.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention also should be regarded as the guarantor of the present invention
Protect range.
Claims (3)
1. the intelligent checking method and instrument of a kind of automatic arc-suppressing device and line-selected earthing device, by electrical quantity conversion module（1）,
Capacitance adjusts module（2）, computer processing module（3）It is electrical special with feeder line zero-sequence current, three-phase voltage and neutral point voltage etc.
Sign amount output end（4）It constitutes, it is characterised in that：By two second part and electric characteristic of automatic arc-suppressing device or line-selected earthing device
Measure output end（4）It is connected, by adjusting capacitance module（2）For different capacitances, it is allowed to be equivalent to the electricity of power grid primary side
Capacitance current value checks measurement accuracy of the automatic arc-suppressing device to electric network capacitance and current, and checks the compensation electricity of automatic arc-suppressing device
Stream output is controlled with residual flow；By adjusting capacitance module（2）Dynamic change in certain capacitance current value, is allowed to be equivalent to power grid
The capacitance current of power grid is caused to change when primary side throwing, retreating circuit, while according to power grid caused by the variation of the capacitance current of power grid
The variation of neutral point displacement voltage adjusts corresponding neutral point displacement voltage, checks automatic arc-suppressing device to power system operating mode
Automatic tracking function；By adjusting electrical quantity conversion module（1）Different current values, the high resistant of simulating grid are injected in certain feeder line
Earth fault, low-impedance earthed system failure check the earthing wire-selecting accuracy of line-selected earthing device；By adjusting electrical quantity conversion module
（1）In certain feeder line Injection Current, change the throughput time of electric current, instantaneity earth fault and the permanent earth event of simulating grid
The handling result of barrier, automatic arc-suppressing device and line-selected earthing device to failure.
2. the intelligent checking method and instrument of a kind of automatic arc-suppressing device according to claim 1 and line-selected earthing device,
It is characterized in that：Electrical quantity conversion module（1）Method by changing each loop current value simulates high resistance earthing fault and low-resistance
Earth fault；Method by changing the throughput time of each loop current simulates instantaneity earth fault and permanent earth event
Barrier.
3. the intelligent checking method and instrument of a kind of automatic arc-suppressing device according to claim 1 and line-selected earthing device,
It is characterized in that：When checking automatic tracking function of the automatic arc-suppressing device to power system operating mode, in adjustment capacitance module（2）'s
When the capacitance current of power grid being caused to change when dynamic change simulating grid primary side throwing, retreating circuit when capacitance current value, simultaneously
The variation of neutral point of electric network displacement voltage is caused to adjust neutral point displacement voltage value according to the change of capacitance current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810492203.5A CN108761231A (en) | 2018-05-22 | 2018-05-22 | A kind of the intelligent checking method and instrument of automatic arc-suppressing device and line-selected earthing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810492203.5A CN108761231A (en) | 2018-05-22 | 2018-05-22 | A kind of the intelligent checking method and instrument of automatic arc-suppressing device and line-selected earthing device |
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| CN108761231A true CN108761231A (en) | 2018-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810492203.5A Pending CN108761231A (en) | 2018-05-22 | 2018-05-22 | A kind of the intelligent checking method and instrument of automatic arc-suppressing device and line-selected earthing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341202A (en) * | 2021-06-09 | 2021-09-03 | 国网陕西省电力公司电力科学研究院 | Method and system for detecting measurement precision of arc suppression coil capacitance current |
Citations (5)
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| JPH1123639A (en) * | 1997-07-03 | 1999-01-29 | Toko Electric Co Ltd | Single pole intermittent spark ground fault tester |
| CN203324463U (en) * | 2013-06-27 | 2013-12-04 | 国家电网公司 | Performance test and evaluation platform for small-current grounding line selection device |
| CN104267365A (en) * | 2014-10-08 | 2015-01-07 | 国家电网公司 | Portable small current earth-fault line selection closed loop performance tester |
| CN105403810A (en) * | 2015-12-03 | 2016-03-16 | 国网山东省电力公司电力科学研究院 | Universal testing system and method of line selection apparatus of low-current grounding system |
| CN107748304A (en) * | 2017-09-23 | 2018-03-02 | 李景禄 | A kind of multifunctional ligand power network neutral earthing devices on-site calibrating method and instrument |
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2018
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Patent Citations (5)
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| JPH1123639A (en) * | 1997-07-03 | 1999-01-29 | Toko Electric Co Ltd | Single pole intermittent spark ground fault tester |
| CN203324463U (en) * | 2013-06-27 | 2013-12-04 | 国家电网公司 | Performance test and evaluation platform for small-current grounding line selection device |
| CN104267365A (en) * | 2014-10-08 | 2015-01-07 | 国家电网公司 | Portable small current earth-fault line selection closed loop performance tester |
| CN105403810A (en) * | 2015-12-03 | 2016-03-16 | 国网山东省电力公司电力科学研究院 | Universal testing system and method of line selection apparatus of low-current grounding system |
| CN107748304A (en) * | 2017-09-23 | 2018-03-02 | 李景禄 | A kind of multifunctional ligand power network neutral earthing devices on-site calibrating method and instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341202A (en) * | 2021-06-09 | 2021-09-03 | 国网陕西省电力公司电力科学研究院 | Method and system for detecting measurement precision of arc suppression coil capacitance current |
| CN113341202B (en) * | 2021-06-09 | 2023-09-26 | 国网陕西省电力公司电力科学研究院 | Method and system for detecting capacitance current measurement precision of arc suppression coil |
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Application publication date: 20181106 |
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