CN103630831B - The check system of grounding direction protective relay - Google Patents
The check system of grounding direction protective relay Download PDFInfo
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- CN103630831B CN103630831B CN201210310828.8A CN201210310828A CN103630831B CN 103630831 B CN103630831 B CN 103630831B CN 201210310828 A CN201210310828 A CN 201210310828A CN 103630831 B CN103630831 B CN 103630831B
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Abstract
The invention discloses a kind of check system of grounding direction protective relay, the secondary side of zero sequential potential transformer connects the first terminals and the 3rd terminals of plug-in unit i.e. in this check system, the A phases of tester voltage channel, which are held, holds that the second terminals respectively through plug-in unit and the 4th terminals connect some potential windings by school relay and polarity is consistent with N phases, the A phases that voltmeter is parallel to tester voltage channel are held and held with N phases, some zero sequence current mutual inductors and ammeter be sequentially connected in series the A phases in tester current channel hold held with N phases between and polarity is consistent, the output end of some zero sequence current mutual inductors is sequentially connected some current coils by school relay respectively and polarity is consistent.This check system can implement verification simultaneously to all grounding direction protective relays of bus; and zero sequence current mutual inductor and zero sequential potential transformer access the system; the correctness of wiring is demonstrated while verification, and alleviates the labor intensity of verification operation, verification efficiency is improved.
Description
Technical field
The present invention relates to a kind of check system of grounding direction protective relay.
Background technology
Grounding direction protective relay is main protection when singlephase earth fault occurring on motor or cable run.Work as electricity
When occurring single-phase earthing in motivation or cable run, ungrounded phase-to-ground voltage rise, maximum can rise to 1.732 times of phase electricity
Pressure, easily causes phase fault.In addition, although the electric current for flowing through earth point is little, because voltage is high, destructive power is very big, and
With electric arc property, easily burn stator core in motor or make electric cable explosion.
Therefore, when singlephase earth fault occurs on motor or cable run, grounding direction protective relay action
Sensitivity, correctness, selectivity are just particularly important.With the development and application of Microcomputer Protection, direction protection relay is grounded
Device has been upgraded to microcomputer type from electromagnetic type, ic-type, and verification is used by platform monomer method of calibration.
The conventional monomeric method of calibration of grounding direction protective relay, is to stop in power bus-bar under labour situation, pulls down ground connection
Directional relay residual voltage, electric current wiring, carry out mark wrapping.By relay protection check instrument to above-mentioned electric current, voltage
Terminal is passed through simulation zero sequence action current, voltage, to verify each protection definite value and characteristic of grounding direction protective relay.
The method of calibration due to the secondary line of zero sequence current mutual inductor, zero sequential potential transformer is not accessed into test loop,
Just have no way of verifying for its wiring correctness.Particularly in the case of bus is powered, the operation of bus residual voltage transformer is being torn open
When connecing each grounding direction protective relay residual voltage wiring, the probability of zero sequential potential transformer short circuit is increased, causes failure
Occur.The conventional monomeric verification of other grounding direction protective relay, which has, substantial amounts of disconnects line workload and frequently instrument is removed
Fortune process, improves the labor intensity of verification operation, reduces verification efficiency.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of check system of grounding direction protective relay, utilize this
Check system can implement verification, and zero sequence current mutual inductor and zero sequence simultaneously to all grounding direction protective relays of bus
Voltage transformer accesses the system, and the correctness of wiring is demonstrated while verification, and alleviate verification operation labor intensity,
Improve verification efficiency.
In order to solve the above technical problems, the check system of grounding direction protective relay of the present invention includes tester, zero
Sequence voltage transformer, some zero sequence current mutual inductors for being divided into multiple protection equipment storehouses, voltmeter, ammeter and some by school
Relay, this check system also includes the zero sequential potential transformer plug-in unit with first to fourth terminals, the residual voltage
The secondary side of transformer connects the first terminals and the 3rd terminals of the plug-in unit, the A phases of the tester voltage channel
Hold and hold the second terminals and the 4th terminals respectively through the plug-in unit to connect some pressure-wires by school relay with N phases
Enclose and polarity is consistent, the A phases that the voltmeter is parallel to the tester voltage channel are held and held with N phases, some zero sequences
Current transformer and ammeter be sequentially connected in series the A phases in the tester current channel hold held with N phases between and polarity is consistent,
The output end of some zero sequence current mutual inductors is sequentially connected some current coils by school relay and polarity respectively
Unanimously, the first terminals of the zero sequential potential transformer plug-in unit connected with the second terminals, the 3rd terminals and the 4th wiring
During the connection of end, power system normal work, the system input verification operation during disconnection.
Because the check system of grounding direction protective relay of the present invention employs above-mentioned technical proposal, i.e. this check system
The secondary side of middle zero sequential potential transformer connects the first terminals and the 3rd terminals of plug-in unit, the A of tester voltage channel
The second terminals and the 4th terminals respectively through plug-in unit are held to connect some potential windings by school relay and pole with N phases in phase end
Property it is consistent, the A phases that voltmeter is parallel to tester voltage channel are held and held with N phases, some zero sequence current mutual inductors and ammeter
The A phases being sequentially connected in series in tester current channel are held held with N phases between and polarity it is consistent, some zero sequence current mutual inductors it is defeated
Go out end be sequentially connected respectively some current coils by school relay and polarity it is consistent.This check system can be all to a bus
Grounding direction protective relay implements verification simultaneously, and zero sequence current mutual inductor and zero sequential potential transformer access the system, school
The correctness of wiring is demonstrated while testing, and alleviates the labor intensity of verification operation, verification efficiency is improved.
Brief description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is the check system schematic diagram of grounding direction protective relay of the present invention.
Embodiment
As shown in figure 1, the check system of grounding direction protective relay of the present invention is mutual including tester 1, residual voltage
Sensor 2, some zero sequence current mutual inductors 6 for being divided into multiple protection equipment storehouses, voltmeter 4, ammeter 5 and some by school relay
Device 7, this check system also includes the zero sequential potential transformer plug-in unit 3 with first to fourth terminals, and the residual voltage is mutual
The secondary side of sensor 2 connects the first terminals and the 3rd terminals of the plug-in unit 3, the A of the voltage channel U of tester 1
The second terminals and the 4th terminals respectively through the plug-in unit 3 are held to connect some electricity by school relay 7 with N phases in phase end
Line ball circle 71 and polarity are consistent, and the A phases that the voltmeter 4 is parallel to the voltage channel U of tester 1 are held and held with N phases, described
The A phases that some zero sequence current mutual inductors 6 and ammeter 5 are sequentially connected in series in the current channel I of tester 1 are held holds it with N phases
Between and polarity is consistent, the output ends of some zero sequence current mutual inductors 6 is sequentially connected described some by school relay 7 respectively
Current coil 72 and polarity are consistent, and the first terminals of the zero sequential potential transformer plug-in unit 3 are connected with the second terminals, the 3rd
When terminals are connected with the 4th terminals, power system normal work, the system input verification operation during disconnection.
Because some grounding direction protective relay residual voltages are from the secondary side joint of power bus-bar zero sequential potential transformer
Enter, therefore this check system distinguishes transition zero sequential potential transformer secondary side and tester using zero sequential potential transformer plug-in unit
Voltage channel, when the terminals of plug-in unit first are connected with the second terminals, the 3rd terminals are connected with the 4th terminals, power train
System can normal work, during disconnection, no matter whether power bus-bar powered can put into verification operation so that all on whole bus to connect
The potential winding of ground direction protective relay can obtain the simulation zero sequence false voltage of tester voltage channel submitting；Simultaneously
The each protection equipment storehouse zero sequence current mutual inductor of power bus-bar is sequentially connected in series the current channel into test apparatus according to polarity, and respectively
Zero sequence current mutual inductor output end is respectively connecting to the current coil of each grounding direction protective relay so that whole piece bus owns
Grounding direction protective relay can obtain the simulation zero sequence fault current sent out by tester current channel.Then supervise respectively
The tripping operation bright sequencing of lamp is alarmed and exported depending on each grounding direction protective relay with regard to that can complete whole piece power bus-bar ground connection side
To the verification of protective relay.
When implementing verification operation, first confirm that power bus-bar has stopped labour, bus hanging earthing conductor, each incoming call side switch is
To maintenance position, control power supply has disconnected.
Power bus-bar zero sequential potential transformer secondary outgoing line side is interrupted using plug-in unit, incoming call side and the relay of plug-in unit is confirmed
Device side, such as bus do not stop labour, are measured with universal meter, powered the first, the 3rd terminals then for incoming call side, i.e. plug-in unit, will verify
The A phases of equipment voltage passage are held, N phases hold be respectively connected to plug-in unit second, the 4th terminals.
Export 10V or so voltages manually by tester, measure each grounding direction protective relay residual voltage terminal,
There should be 10V or so voltages.Process of the test should cut off tester output immediately if any exception, and disconnect tester power supply, examine
Circuit connection is looked into until wiring is correct.
Further, the A phases of tester current channel are held, N phases terminate the power bus-bar verified into needs and are grounded direction
The zero sequence current mutual inductor of protective relay, each zero sequence current mutual inductor wiring is flowed into according to electric current, flowed out, flowing into, flowing out entirely
Portion is concatenated.And noticing that current polarity termination tester A phases are held, nonpolar termination N phases are held.
Confirm the validity and correctness of above-mentioned electric current, voltage circuit.Current loop is ensured without open circuit, and voltage circuit is without short
Road phenomenon.Trial line charging, confirms that tester output, relay are working properly.Process of the test cuts off tester immediately if any exception
Device is exported, and disconnects tester power supply, checks circuit connection.
Minimum zero-sequence fault voltage operation value verification.Manually regulation tester voltage output, to ground connection direction protection after
Electrical equipment grounding surge junction closure, alarm lamp is bright, wherein a magnitude of voltage during junction closure of minimum is minimum
Zero-sequence fault voltage operation value.
Further, minimum zero-sequence fault electric current working value verification.Regulation tester electric current output manually, operating angle is set
In maximum 45 ° of fineness angle（Electric current leading voltage）, to each grounding direction protective relay outlet action connection point closure, tripping operation is indicated
Lamp is bright, wherein a current value during junction closure of minimum is minimum zero sequence working value.
Further operating angle range check.False voltage takes minimum zero-sequence fault voltage operation value, and fault current takes most
Small zero-sequence fault electric current working value, adjusts tester, changes phase between electric current, voltage, to each ground connection direction protection relay
Device outlet action connection point closure, tripping operation indicator lamp is bright, is action in the maximum of first, second, fourth quadrant, minimum limit value
Angular area thresholding.
Further, actuation time determines.Voltage takes minimum 1.5 times of zero-sequence fault voltage operation value, and electric current takes minimum zero sequence
2 times of fault current working value, operating angle takes 45 °（Electric current leading voltage）, while output voltage and electric current, survey each ground connection direction
Protective relay exports three average values of action connection point closing time.
Zero sequence current mutual inductor and zero sequential potential transformer secondary side are introduced test loop by this check system, can be verified
Its wiring correctness；Especially under power bus-bar zero sequential potential transformer running situation, it is only necessary to use zero sequential potential transformer
Plug-in unit interrupts zero sequential potential transformer secondary side, and no longer needs to disconnect each grounding direction protective relay residual voltage wiring,
Significantly reduce the probability of zero sequential potential transformer short circuit；It is a large amount of when reducing original monomer verification to disconnect line work and tester
The frequent carrying of device, alleviates the labor intensity of verification, improves the efficiency of verification.
This check system can be substantially reduced to tester current channel in simulation zero sequence fault current test loop
Low current, high-precision requirement.Because the test current added by monomer method of calibration is the secondary current of zero sequence current mutual inductor, and
The no-load voltage ratio of zero sequence current mutual inductor is generally 200ma/1.5ma, and secondary current is milliampere level electric current and very little, conventional tester
This required precision can not be met.And the electric current of this check system zero sequence current mutual inductor added in test loop is once
Electric current, is more than 130 times of secondary current, this just substantially reduces the requirement to tester current channel.
Claims (1)
1. a kind of check system of grounding direction protective relay, including tester, zero sequential potential transformer, be divided into it is multiple
Some zero sequence current mutual inductors in protection equipment storehouse, voltmeter, ammeter and some by school relay, it is characterised in that：Also wrap
The zero sequential potential transformer plug-in unit with first to fourth terminals is included, the secondary side connection of the zero sequential potential transformer is described
The first terminals and the 3rd terminals of plug-in unit, the A phases of the tester voltage channel are held holds respectively through the plug-in unit with N phases
The second terminals and the 4th terminals connect some potential windings by school relay and polarity is consistent, the voltmeter
The A phases for being parallel to the tester voltage channel are held and held with N phases, and some zero sequence current mutual inductors and ammeter are gone here and there successively
Be connected to the A phases of the tester current channel hold held with N phases between and polarity it is consistent, some zero sequence current mutual inductors
Output end is sequentially connected some current coils by school relay respectively and polarity is consistent, and the zero sequential potential transformer is inserted
When first terminals of part are connected with the second terminals, the 3rd terminals are connected with the 4th terminals, power system normal work,
The system input verification operation during disconnection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210310828.8A CN103630831B (en) | 2012-08-29 | 2012-08-29 | The check system of grounding direction protective relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210310828.8A CN103630831B (en) | 2012-08-29 | 2012-08-29 | The check system of grounding direction protective relay |
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| CN103630831A CN103630831A (en) | 2014-03-12 |
| CN103630831B true CN103630831B (en) | 2017-08-25 |
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| CN201210310828.8A Active CN103630831B (en) | 2012-08-29 | 2012-08-29 | The check system of grounding direction protective relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106740993B (en) * | 2016-12-14 | 2018-10-16 | 太原科技大学 | It is a kind of with the railway signaling dynamic driving device of defencive function and its guard method |
| CN108414960A (en) * | 2018-04-13 | 2018-08-17 | 南京丹迪克电力仪表有限公司 | A kind of multichannel directly measures formula mutual-inductor tester and method of calibration |
| CN111092000A (en) * | 2019-12-19 | 2020-05-01 | 国家电网有限公司 | Terminal assembly without dismounting and relay provided with terminal assembly without dismounting |
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| CN103630831A (en) | 2014-03-12 |
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Address after: No. 3520 Tongji Road, Baoshan District, Shanghai, 201900 Patentee after: Baowu equipment Intelligent Technology Co., Ltd Address before: 201900, 335, Pu Pu Road, Shanghai, Baoshan District Patentee before: SHANGHAI BAOSTEEL INDUSTRY TECHNOLOGICAL SERVICE Co.,Ltd. |
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