CN107748304A - A kind of multifunctional ligand power network neutral earthing devices on-site calibrating method and instrument - Google Patents
A kind of multifunctional ligand power network neutral earthing devices on-site calibrating method and instrument Download PDFInfo
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- CN107748304A CN107748304A CN201710870057.0A CN201710870057A CN107748304A CN 107748304 A CN107748304 A CN 107748304A CN 201710870057 A CN201710870057 A CN 201710870057A CN 107748304 A CN107748304 A CN 107748304A
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- fault
- earthing
- distribution network
- neutral point
- power distribution
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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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- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
A kind of multifunctional ligand power network neutral earthing devices method of calibration and instrument, three-phase voltage value, neutral point voltage value and loop zero-sequence current value are adjusted by electrical quantity modular converter to simulate the fault characteristic value of power distribution network high resistance earthing fault and low-impedance earthed system failure；The fault characteristic value of power distribution network permanent earth fault, instantaneity earth fault and the complex grounding fault with interruption is simulated by adjusting three-phase voltage value, neutral point voltage value and the duration of each loop zero-sequence current value and loop zero-sequence current；By size and its capacitance current of change modeling power distribution network and the state characteristic quantity of change that capacitance is adjusted to tunable capacitor module；For the power network neutral point earthing or grounding means of different types, the logic function and wiring correctness of verification power network neutral point earthing or grounding means after the secondary circuit of power network neutral point earthing or grounding means inputs power distribution network analogue ground fault characteristic value or emulation mode characteristic quantity.
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 in power network neutral point
Function check when the live function check and preventive trial of earthing or grounding means.
Background technology
Power network neutral point earthing or grounding means is widely used in the product of one-phase earthing failure in electric distribution network processing, and this kind of product has
Automatic Following-up Compensation Arc-decreasing Wires, failure phase transfer earthing or grounding means, electric resistance earthing device and dynamic earth fault device etc..To this kind of production
Product can do some functional trials in distribution simulation laboratory under lab, once but these products be installed to scene,
Functional trial can not be done to this kind of product due to lacking due research technique, some Insulation Tests only are done to the part of product
Project, so that lacking supervision to the function of product.And after power network neutral point earthing or grounding means is installed to scene, or running to
After some cycles due to transporting, install, and the reason for electronic component operating point drift, the logic function of device can occur
Change, What is more, and secondary circuit be able to can not work because wrong line can be directed at power network neutral point earthing or grounding means.These are all
The main reason for power network neutral point earthing or grounding means can not play a role well is directed at, thus is developed a kind of suitable for a variety of
Pattern power network neutral point earthing or grounding means on-site calibrating method or instrument application are in various types power network neutral point earthing or grounding means
Field-checking is very important.
The content of the invention
In view of the above-mentioned problems, a kind of multifunctional ligand power network neutral earthing devices method of calibration and instrument are invented, by electricity
Tolerance modular converter（1）, tunable capacitor module（2）, computer processing module（3）With electric characteristic amount output end（4）Form.Its
Working method is：Computer processing module（3）Pass through electrical quantity modular converter（1）Adjust three-phase voltage value, neutral point voltage value
And loop zero-sequence current value simulates the fault characteristic value of power distribution network high resistance earthing fault and low-impedance earthed system failure；Pass through adjustment three
Phase voltage value, neutral point voltage value and the duration of each loop zero-sequence current value and loop zero-sequence current simulate power distribution network forever
The fault characteristic value of long property earth fault, instantaneity earth fault and the complex grounding fault with interruption；Pass through tunable capacitor module（2）Adjustment
The size of capacitance and its capacitance current of change modeling power distribution network and the state characteristic quantity of changes of operating modes；For different shaped
The power network neutral point earthing or grounding means of formula, by electric characteristic amount output end（4）In the secondary returning of power network neutral point earthing or grounding means
Road verifies patrolling for power network neutral point earthing or grounding means after inputting power distribution network analogue ground fault characteristic value or emulation mode characteristic quantity
Collect function and wiring correctness.
Present invention tool has the advantage that：
1st, the present invention takes the mode of the integrated processing of low pressure, by electrical quantity modular converter, tunable capacitor module, computer disposal mould
Block and electric characteristic amount output end, which are formed, is integrated in an instrument internal, easy to operate, easy to remove, can conveniently be applied to scene
Debugging, accurate quick.
2nd, the analogue ground fault characteristic value or emulation mode characteristic quantity of the instrument output end output that the present invention develops with it is true
The state characteristic quantity of real one-phase earthing failure in electric distribution network characteristic quantity or power distribution network has preferable equivalence.
3rd, the present invention using different power network neutral point earthing or grounding means are inputted different analogue ground fault characteristic value or
Emulation mode characteristic quantity has larger use range.
4th, the present invention is using special to power network neutral point earthing or grounding means input analogue ground fault characteristic value or emulation mode
The method of sign amount verification solves the problem that power network neutral point earthing or grounding means lacks live function check always.
Brief description of the drawings
Fig. 1 is the function structure chart of instrument of the present invention.
Embodiment
A kind of multifunctional ligand power network neutral earthing devices method of calibration and instrument, by electrical quantity modular converter（1）, it is adjustable
Capacitance module（2）, computer processing module（3）With electric characteristic amount output end（4）Form, its working method is：At computer
Manage module（3）Pass through electrical quantity modular converter（1）Adjustment three-phase voltage value, neutral point voltage value and loop zero-sequence current value carry out mould
Intend power distribution network high resistance earthing fault and the fault characteristic value of low-impedance earthed system failure；By adjusting three-phase voltage value, neutral point voltage
Value and the duration of each loop zero-sequence current value and loop zero-sequence current simulate power distribution network permanent earth fault, instantaneity
The fault characteristic value of earth fault and the complex grounding fault with interruption；Pass through tunable capacitor module（2）Adjust size and its change of capacitance
Change the capacitance current of simulation power distribution network and the state characteristic quantity of changes of operating modes；Connect for the power network neutral point of different types
Ground device, by electric characteristic amount output end（4）Connect in the secondary circuit input power distribution network simulation of power network neutral point earthing or grounding means
The logic function and wiring correctness of power network neutral point earthing or grounding means are verified after earth fault characteristic quantity or emulation mode characteristic quantity.
The simulated failure that high resistance earthing fault and low-impedance earthed system failure are inputted to distribution network failure phase transfer earthing or grounding means is special
Sign amount, the simulated failure characteristic quantity of permanent earth fault, instantaneity earth fault and the complex grounding fault with interruption verify power distribution network
The logic function and wiring correctness of failure phase transfer earthing or grounding means.
Emulation mode characteristic quantity and its change to power distribution network automatic blowout coil input power distribution network, 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；Input permanent earth fault, the simulated failure characteristic quantity of instantaneity earth fault and the complex grounding fault with interruption verify
The logic function and wiring correctness of power distribution network automatic blowout coil.
High resistance earthing fault and the simulated failure characteristic quantity of low-impedance earthed system failure are inputted to power distribution network electric resistance earthing device, forever
Long property earth fault and the simulated failure characteristic quantity of instantaneity earth fault and the complex grounding fault with interruption connect to verify power distribution network resistance
The function and wiring correctness of ground device.
The simulated failure that high resistance earthing fault and low-impedance earthed system failure are inputted to power network neutral point dynamic earth fault device is special
The simulated failure characteristic quantity of sign amount, permanent earth fault and instantaneity earth fault and the complex grounding fault with interruption verifies power distribution network
The function and wiring correctness of neutral point dynamic earth fault device.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention also should be regarded as the guarantor of the present invention
Protect scope.
Claims (5)
1. a kind of multifunctional ligand power network neutral earthing devices method of calibration and instrument, by electrical quantity modular converter（1）, adjustable electric
Molar block（2）, computer processing module（3）With electric characteristic amount output end（4）Form, it is characterised in that：Computer disposal mould
Block（3）Pass through electrical quantity modular converter（1）Adjustment three-phase voltage value, neutral point voltage value and loop zero-sequence current value are matched somebody with somebody to simulate
The fault characteristic value of power network high resistance earthing fault and low-impedance earthed system failure；By adjust three-phase voltage value, neutral point voltage value and
The duration of each loop zero-sequence current value and loop zero-sequence current simulates power distribution network permanent earth fault, instantaneity ground connection
The fault characteristic value of failure and the complex grounding fault with interruption；Pass through tunable capacitor module（2）Adjust the size and its changing pattern of capacitance
Intend the capacitance current of power distribution network and the state characteristic quantity of changes of operating modes；Dress is grounded for the power network neutral point of different types
Put, by electric characteristic amount output end（4）In the secondary circuit input power distribution network analogue ground event of power network neutral point earthing or grounding means
Barrier characteristic quantity or emulation mode characteristic quantity are used for the logic function and wiring correctness for verifying power network neutral point earthing or grounding means.
2. a kind of multifunctional ligand power network neutral earthing devices method of calibration according to claim 1 and instrument, its feature
It is：The simulated failure feature of high resistance earthing fault and low-impedance earthed system failure is inputted to distribution network failure phase transfer earthing or grounding means
Amount, the simulated failure characteristic quantity of permanent earth fault, instantaneity earth fault and the complex grounding fault with interruption are former to verify power distribution network
Hinder the logic function and wiring correctness of phase transfer earthing or grounding means.
3. a kind of multifunctional ligand power network neutral earthing devices method of calibration according to claim 1 and instrument, its feature
It is：Emulation mode characteristic quantity and its change to power distribution network automatic blowout coil input power distribution network, examine automatic blowout coil
To capacitance current of distribution network measurement accuracy, tune sense correctness, correctness and residual flow control are being tracked to power system operating mode just
True property；The simulated failure characteristic quantity of input permanent earth fault, instantaneity earth fault and the complex grounding fault with interruption is matched somebody with somebody to verify
The logic function and wiring correctness of power network automatic blowout coil.
4. a kind of multifunctional ligand power network neutral earthing devices method of calibration according to claim 1 and instrument, its feature
It is：High resistance earthing fault and the simulated failure characteristic quantity of low-impedance earthed system failure are inputted to power distribution network electric resistance earthing device, forever
Property earth fault, instantaneity earth fault and the complex grounding fault with interruption simulated failure characteristic quantity come verify power distribution network resistance eutral grounding dress
The function and wiring correctness put.
5. a kind of multifunctional ligand power network neutral earthing devices method of calibration according to claim 1 and instrument, its feature
It is：The simulated failure feature of high resistance earthing fault and low-impedance earthed system failure is inputted to power network neutral point dynamic earth fault device
Amount, the simulated failure characteristic quantity of permanent earth fault, instantaneity earth fault and the complex grounding fault with interruption are verified in power distribution network
The function and wiring correctness of property point dynamic earthing or grounding means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710870057.0A CN107748304B (en) | 2017-09-23 | 2017-09-23 | Multifunctional distribution network neutral point grounding device field calibration method and instrument |
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|---|---|---|---|
| CN201710870057.0A CN107748304B (en) | 2017-09-23 | 2017-09-23 | Multifunctional distribution network neutral point grounding device field calibration method and instrument |
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| CN107748304B CN107748304B (en) | 2021-04-20 |
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Cited By (2)
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| CN108761231A (en) * | 2018-05-22 | 2018-11-06 | 李景禄 | A kind of the intelligent checking method and instrument of automatic arc-suppressing device and line-selected earthing device |
| CN109375056A (en) * | 2018-10-19 | 2019-02-22 | 国网浙江省电力有限公司电力科学研究院 | Distribution broken string is grounded live test loop and fault simulation platform and test method |
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| CN109375056B (en) * | 2018-10-19 | 2023-11-07 | 国网浙江省电力有限公司电力科学研究院 | Distribution network broken line grounding live test loop, fault simulation platform and test method |
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| CN107748304B (en) | 2021-04-20 |
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