CN101587157A - Bus differential protection polarity test method - Google Patents
Bus differential protection polarity test method Download PDFInfo
- Publication number
- CN101587157A CN101587157A CNA2009100652818A CN200910065281A CN101587157A CN 101587157 A CN101587157 A CN 101587157A CN A2009100652818 A CNA2009100652818 A CN A2009100652818A CN 200910065281 A CN200910065281 A CN 200910065281A CN 101587157 A CN101587157 A CN 101587157A
- Authority
- CN
- China
- Prior art keywords
- branch road
- tested
- current
- bus
- isolating switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000002633 protecting effect Effects 0.000 claims description 33
- 238000012360 testing method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 238000012795 verification Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a bus differential protection polarity test method. The technical key point of the method is as follows: a current transformer of a random tested branch line on the I segment bus of a transformer substation is used as a reference point, a large current which flows into a tested branch line on the II segment of the transformer substation through a bus coupling current transformer is exerted from a primary non-polar end of the branch current transformer; and then the bus differential protection polarities of other branch lines of the transformer substations are sequentially checked while the connection modes of the tested branch line I and the bus coupling branch line are kept unchanged. The method of the invention can check out the miswiring or error wiring of the secondary connection of each branch line current transformer with a same voltage level in the transformer substation for preventing the error wiring of the bus differential protection polarity of the newly-built transformer substation. The protection checking time when the newly-built transformer substation is put into operation is reduced, and each user is supplied with electricity safely and quickly. The reliability of bus differential protection operation in the transformer is increased, and the stable operation of the electrical power system is guaranteed.
Description
Technical field
The present invention relates to the method for testing of substation bus bar differential protection polarity in a kind of electric system, belong to relay protection of power system and automatic safety device check field.
Background technology
Transformer station is the power supply hinge of electric system, and it is powered to the user by each branch breaker on the bus in the transformer station.Bus differential protecting is the protective relaying device of protection substation bus bar.Bus differential protecting is that all current transformers that connect branch roads on the bus are connected to differential circuit by same famous prime minister, same polarity; its major function is to disconnect all branch breakers that link to each other with fault bus when protected bus breaks down rapidly, bus differential protecting device miss operation when breaking down in addition as if bus ranges.Because the bus differential protecting action can cause on the bus all branch breakers tripping operations, causes large-area power outage,, be the problem that electric system is paid close attention to for a long time always so can bus differential protecting correct operation.Influencing the main factor that can bus differential protecting correct operation is the polarity of bus differential protecting; the polarity of bus differential protecting is made up of the polarity of the current transformer of all branch roads on the bus, and the incorrect polarity of arbitrary branch current mutual inductor all can cause the incorrect polarity of bus differential protecting.If the polarity wiring error of bus differential protecting, bus differential protecting miss operation when protected bus breaks down, the route protection action excision fault by upper level transformer station causes the power failure expanded range; And causing the bus differential protecting malfunction when outlet fault takes place arbitrary branch road when going up beyond the bus ranges, all branch breakers on the mistake excision bus also cause the power failure expanded range.Therefore the polarity of verification bus differential protecting is the most important thing of all work before bus differential protecting puts into operation.
Present stage; the polarity of verification bus differential protecting generally all is before bus differential protecting puts into operation; at each branch road of bus all under the situation of charging operation, withdraw from bus differential protecting and carry out on-load and measure, whether the polarity of checking bus differential protecting according to measurement result is correct.This way has the defective of following three aspects: 1) withdraw from bus differential protecting and carry out on-load when measuring; because institute's band branch road is more on the bus, checking time is longer, if bus breaks down during this period; the bus differential protecting miss operation causes pernicious power grid accident.2) the bus differential protection polarity verification is subjected to the influence of load current bigger, in the situation that the polarity check errors hour may occur of load current.The electric current of particularly female connection branch road is less under normal situation, and a lot of female connection current transformer polarity wrong accidents once took place in electric system difficult discovery during polarity wrong.When 3) finding bus differential protecting branch current mutual inductor polarity wiring error according to measurement result, because each branch road charging operation all, difficulty is bigger when rectifying and improving this branch current mutual inductor polarity.If can be at the construction field (site); if particularly can be according to transformer station's mode of connection in newly-built transformer station; before each branch road charging operation of substation bus bar, when doing experiment for each branch current mutual inductor, the polarity of check bus differential protecting is a kind of test method of novel science.
Summary of the invention
For fear of above various shortcoming, the present invention proposes a kind of method of testing of substation bus bar differential protection polarity, this method is simple to operate, check comprehensively, can avoid bus differential protecting out of service, can when finding the bus differential protection polarity mistake, in time rectify and improve again, accomplish the pre-control that accident is preceding; Can guarantee the safe and stable operation of electrical network.
Solving the technical scheme that problem of the present invention adopted is: the current transformer with arbitrary tested branch road I on the I of the transformer station section bus is a reference point, feed big electric current from a non-polar end P2 of this branch current mutual inductor, this electric current is by a tested branch road II on the female connection current transformer inflow II of transformer station section bus; This direction of current flows into the I of transformer station section bus from the current transformer non-polar end P2 of tested branch road I, and the polar end P1 that joins current transformer by mother flows into behind the II of the transformer station section bus and the current transformer polar end P1 by tested branch road II flows into tested branch road II; The mode of connection of tested then branch road I and female connection branch road keeps motionless, checks the polarity of other branch current mutual inductor bus differential protectings of transformer station successively.
According to the bus differential protecting principle as can be known, if the polarity of substation bus bar differential protection is correct, then this moment bus differential protecting big spill current be that the electric current I 2 that the electric current I 1 of tested branch road I deducts tested branch road II equals zero; The little spill current of I section bus is that the electric current I 1 of tested branch road I deducts female connection branch current Im and equals zero.The little spill current of II section bus is that the electric current I 2 of tested branch road II deducts female connection electric current I m and equals zero.
Good effect of the present invention is: (1) can be checked through missing or misconnection of each branch current mutual inductor secondary connection of same electric pressure in the transformer station, has avoided the mistake of newly-built substation bus bar differential protection polarity to insert; Protection checking time when (2) the newly-built transformer station of minimizing puts into operation, safety quick send electricity to each user, increases economic efficiency; (3) improve bus differential protecting reliability of operation in the transformer station, ensured the stable operation of electric system.
Description of drawings
Fig. 1 is a wiring schematic diagram of the present invention.
Embodiment
Accompanying drawing is a kind of specific embodiment of the present invention, and this embodiment is the primary connection figure of transformer station, and tested branch road is a same electric pressure branch road in the transformer station simultaneously.
(1) at first the polar end K1 of current transformer current lifting device 1 is connected on the A phase current mutual inductor 14 non-polar end P2 of tested branch road I2; (2) it is online that the non-polar end K2 of current transformer current lifting device 1 terminates at the ground of transformer station; (3) isolating switch 3 on the tested branch road I2, I section bus isolating switch 4, and closing the position all the time, the isolating switch 9 on the tested branch road II8 that closes simultaneously, II section bus isolating switch 10 in I section bus isolating switch 5, II section bus isolating switch 6 and isolating switch 7 processs of the test on tested female connection branch road 13; (4) it is online that the non-polar end P2 of the current transformer 16 of tested branch road II8 is connected on the ground of transformer station; (5) add electric current 600A from current transformer current lifting device 1; (6) isolating switch 3 on tested branch road I2, isolating switch 7 on tested female connection branch road 13, measure the numerical value of all A phase current mutual inductor Secondary Winding in the terminal box of the isolating switch 9 on the tested branch road II8 with clamp on amperemeter, carry out record, and after bus differential protecting screen place sets correlation parameter in accordance with regulations, check the bus differential protecting difference current, if this moment, the big spill current of bus differential protecting equalled zero, the little spill current of I section bus equals zero, the little spill current of II section bus equals zero, then this moment three branch roads A phase current mutual inductor 14,15,16 polarity wiring are correct, otherwise incorrect polarity; (6) after the A phase current mutual inductor off-test of tested branch road I (2), branch road II (8), female connection branch road (13), check tested branch road I (2), branch road II (8), female connection branch road (13) B, C biphase current mutual inductor wiring polarity again by same test method; (7) after these three branch road off-tests; current transformer current lifting device 1; isolating switch 3 on the test branch road I2; I section bus isolating switch 4; and the I section bus isolating switch 5 on tested female connection branch road 13; it is motionless that the II section bus isolating switch 6 and isolating switch 7 modes of connection keep; isolating switch 9 with tested branch road II8; II section bus isolating switch 10; the non-polar end P2 of current transformer 16 and the grounded screen of transformer station disconnect respectively; if this electric pressure of transformer station also has other branch roads; operate other branch roads successively by the mode of connection of tested branch road II8 so, check the polarity of the bus differential protecting of whole transformer station by that analogy.
Claims (2)
1, a kind of bus differential protection polarity test method, it is characterized in that: the current transformer (14) with last arbitrary the tested branch road I of I section bus (11) (2) of transformer station is a reference point, feed big electric current from non-polar end P2 of current transformer of this circuit, this electric current is by the tested branch road II (8) on the II section bus (12) of the inflow of the current transformer (15) on tested female connection branch road (13) transformer station; This direction of current flows into the I of transformer station section bus (11) from current transformer (14) the non-polar end P2 of tested branch road I (2), and the polar end P1 inflow II of transformer station section bus (12) back of going up current transformer (15) by tested mother's connection branch road (13) also flows into tested branch road II (8) by current transformer (16) the polar end P1 of tested branch road II (8); It is motionless that the mode of connection of tested then branch road I (2) and tested female connection branch road (13) keeps, and according to the mode of connection of tested branch road II 8, checks other branch current mutual inductor bus differential protection polarities of transformer station successively.
2, bus differential protection polarity test method according to claim 1 is characterized in that: concrete implementation step is:
(1), at first the polar end K1 of a current transformer current lifting device (1) is connected on A phase current mutual inductor (14) the non-polar end P2 of tested branch road I (2);
(2), it is online that the non-polar end K2 of current transformer current lifting device (1) terminates at the ground of transformer station;
(3), the isolating switch (3) on the tested branch road I (2), I section bus isolating switch (4), and closing the position all the time in I section bus isolating switch (5), II section bus isolating switch (6) and isolating switch (7) process of the test on tested female connection branch road (13), the isolating switch (9) on the tested branch road II (8) that closes simultaneously, II section bus isolating switch (10) and that the non-polar end P2 of current transformer 16 is connected on the ground of transformer station is online;
(4), add electric current 600A from current transformer current lifting device (1);
(5), measure the numerical value of all A phase current mutual inductor Secondary Winding in the isolating switch (7) on the isolating switch (3) on tested branch road I (2), the tested female connection branch road (13), isolating switch (9) terminal box on the tested branch road II (8) with clamp on amperemeter, carry out record, and after bus differential protecting screen place sets correlation parameter, check the bus differential protecting difference current;
(6), after the A phase current mutual inductor off-test of tested branch road I (2), branch road II (8), female connection branch road (13), check B, the C biphase current mutual inductor wiring polarity of tested branch road I (2), branch road II (8), female connection branch road (13) again by same test method;
(7), after these three branch road off-tests, isolating switch (3) on current transformer current lifting device (1), the tested branch road I (2), I section bus isolating switch (4), and the I section bus isolating switch (5) on tested female connection branch road (13), II section bus isolating switch (6) and the maintenance of isolating switch (7) mode of connection are motionless, and isolating switch (9), II section bus isolating switch (10), the non-polar end P2 of current transformer (16) and the grounded screen of transformer station of tested branch road II (8) is disconnected respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100652818A CN101587157B (en) | 2009-06-26 | 2009-06-26 | Bus differential protection polarity test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100652818A CN101587157B (en) | 2009-06-26 | 2009-06-26 | Bus differential protection polarity test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101587157A true CN101587157A (en) | 2009-11-25 |
| CN101587157B CN101587157B (en) | 2011-05-11 |
Family
ID=41371486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100652818A Expired - Fee Related CN101587157B (en) | 2009-06-26 | 2009-06-26 | Bus differential protection polarity test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101587157B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565592A (en) * | 2012-01-18 | 2012-07-11 | 绍兴电力局 | Technology-systematization verification short-circuit test method for intelligent substation |
| CN102636726A (en) * | 2012-04-16 | 2012-08-15 | 许继集团有限公司 | Method for carrying out adaptive discriminating on polarity of CT (current transformer) of new line in distribution network |
| CN102879708A (en) * | 2012-09-21 | 2013-01-16 | 西安供电局 | Quick polarity testing method of 110kV gas insulated switchgear (GIS) of transformer substation |
| CN105388385A (en) * | 2015-12-16 | 2016-03-09 | 国家电网公司 | Bus differential protection vector concentrated test method |
| CN106569075A (en) * | 2015-10-10 | 2017-04-19 | 宝山钢铁股份有限公司 | Main transformer and high voltage side cable zero-sequence differential protection polarity test circuit and method |
| CN109946561A (en) * | 2019-05-13 | 2019-06-28 | 上海思源弘瑞自动化有限公司 | A kind of current transformer polarity testing method, apparatus, equipment and storage medium |
| CN111060771A (en) * | 2019-12-31 | 2020-04-24 | 中国能源建设集团华东电力试验研究院有限公司 | Relay protection and automatic calibration system with analog load |
| CN111123172A (en) * | 2019-12-26 | 2020-05-08 | 深圳供电局有限公司 | Consistency checking method for polarity of each interval CT secondary winding of bus differential protection |
| CN111624523A (en) * | 2020-06-02 | 2020-09-04 | 西安热工研究院有限公司 | System and method for verifying differential protection polarity of line of generator-transformer unit wiring mode system |
| CN113625644A (en) * | 2021-08-19 | 2021-11-09 | 国网四川省电力公司电力科学研究院 | Auxiliary system for debugging alternating current system |
| CN117031171A (en) * | 2023-08-26 | 2023-11-10 | 国家电网有限公司 | Method for simulating polarity test of relay protection equipment without actual load |
| CN117169640A (en) * | 2023-11-02 | 2023-12-05 | 云南电力试验研究院(集团)有限公司 | Multiple ratio differential verification method and device under multi-distributed new energy access feeder line |
| CN119064850A (en) * | 2024-11-06 | 2024-12-03 | 国网山东省电力公司淄博供电公司 | A CT polarity determination method, system, terminal and storage medium |
-
2009
- 2009-06-26 CN CN2009100652818A patent/CN101587157B/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565592A (en) * | 2012-01-18 | 2012-07-11 | 绍兴电力局 | Technology-systematization verification short-circuit test method for intelligent substation |
| CN102565592B (en) * | 2012-01-18 | 2015-09-30 | 绍兴电力局 | A kind of technology-systematization verification short-circuit test method for intelligent substation |
| CN102636726A (en) * | 2012-04-16 | 2012-08-15 | 许继集团有限公司 | Method for carrying out adaptive discriminating on polarity of CT (current transformer) of new line in distribution network |
| CN102879708A (en) * | 2012-09-21 | 2013-01-16 | 西安供电局 | Quick polarity testing method of 110kV gas insulated switchgear (GIS) of transformer substation |
| CN102879708B (en) * | 2012-09-21 | 2015-06-24 | 西安供电局 | Quick polarity testing method of 110kV gas insulated switchgear (GIS) of transformer substation |
| CN106569075A (en) * | 2015-10-10 | 2017-04-19 | 宝山钢铁股份有限公司 | Main transformer and high voltage side cable zero-sequence differential protection polarity test circuit and method |
| CN106569075B (en) * | 2015-10-10 | 2019-02-05 | 宝山钢铁股份有限公司 | Main transformer and high-pressure side cable zero sequence differential protection polarity hookup and method |
| CN105388385A (en) * | 2015-12-16 | 2016-03-09 | 国家电网公司 | Bus differential protection vector concentrated test method |
| CN109946561A (en) * | 2019-05-13 | 2019-06-28 | 上海思源弘瑞自动化有限公司 | A kind of current transformer polarity testing method, apparatus, equipment and storage medium |
| CN109946561B (en) * | 2019-05-13 | 2022-02-18 | 上海思源弘瑞自动化有限公司 | Current transformer polarity testing method, device, equipment and storage medium |
| CN111123172A (en) * | 2019-12-26 | 2020-05-08 | 深圳供电局有限公司 | Consistency checking method for polarity of each interval CT secondary winding of bus differential protection |
| CN111123172B (en) * | 2019-12-26 | 2022-01-25 | 深圳供电局有限公司 | Consistency checking method for polarity of each interval CT secondary winding of bus differential protection |
| CN111060771A (en) * | 2019-12-31 | 2020-04-24 | 中国能源建设集团华东电力试验研究院有限公司 | Relay protection and automatic calibration system with analog load |
| CN111624523A (en) * | 2020-06-02 | 2020-09-04 | 西安热工研究院有限公司 | System and method for verifying differential protection polarity of line of generator-transformer unit wiring mode system |
| CN113625644A (en) * | 2021-08-19 | 2021-11-09 | 国网四川省电力公司电力科学研究院 | Auxiliary system for debugging alternating current system |
| CN113625644B (en) * | 2021-08-19 | 2022-04-15 | 国网四川省电力公司电力科学研究院 | Auxiliary system for debugging alternating current system |
| CN117031171A (en) * | 2023-08-26 | 2023-11-10 | 国家电网有限公司 | Method for simulating polarity test of relay protection equipment without actual load |
| CN117031171B (en) * | 2023-08-26 | 2024-04-19 | 国家电网有限公司 | A method for testing relay protection equipment polarity without actual load simulation |
| CN117169640A (en) * | 2023-11-02 | 2023-12-05 | 云南电力试验研究院(集团)有限公司 | Multiple ratio differential verification method and device under multi-distributed new energy access feeder line |
| CN117169640B (en) * | 2023-11-02 | 2024-02-20 | 云南电力试验研究院(集团)有限公司 | Multiple ratio differential verification method and device under multi-distributed new energy access feeder line |
| CN119064850A (en) * | 2024-11-06 | 2024-12-03 | 国网山东省电力公司淄博供电公司 | A CT polarity determination method, system, terminal and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101587157B (en) | 2011-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101587157B (en) | Bus differential protection polarity test method | |
| Mulhausen et al. | Anti-islanding today, successful islanding in the future | |
| CN102694369B (en) | Method for preventing low-voltage protection misoperation of motor caused by PT disconnection | |
| CN112262511A (en) | Universal power distribution system for detecting and repairing electrical faults and construction method thereof | |
| CN102621417B (en) | Method for testing automatic throw-in equipment of emergency power supply | |
| CN106571688B (en) | DC system operation mode and method for monitoring operation state of isolating switch | |
| CN104090208B (en) | Voltage-type distribution network failure method of disposal | |
| CN104198832B (en) | A kind of high pressure transformer and distribution power station Integrated Checkout test method | |
| CN105655879B (en) | The voltage arrangement of 110 kilovolts of system busbar combining unit duplicate system retrofits of intelligent substation double bus scheme mode | |
| KR101505176B1 (en) | Apparatus and method for detecting failure of bus | |
| CN104319871B (en) | Transformer station domain island protection and backup automatic switching integrated method | |
| CN105807174A (en) | Current transformer broken line detection method in power transmission and distribution system protection | |
| CN103412239B (en) | Detecting and positioning method of bus coupler flashover fault in subway alternating current power system | |
| CN104466943B (en) | Safety equipment and method for electric facility | |
| CN105006810A (en) | Fault processing method of neutral-point non-effective grounding system and corresponding processing system | |
| CN103354352A (en) | Distributed intelligence based power distribution network safety protection method | |
| CN105514948A (en) | Backup automatic switching (BZT) apparatus breaker breakdown detection method and BZT apparatus | |
| CN105529681B (en) | The earth leakage protective implementation method of low voltage ungrounded system | |
| CN107884665A (en) | Prevent the device and method of generator outlet voltage transformer turn-to-turn short circuit false tripping machine | |
| CN201789272U (en) | Relay protection circuit preventing transformer differential protection malfunction | |
| CN108459230A (en) | Electric high-voltage equipment fault detection method | |
| CN101556319A (en) | Ground fault detection and calibration method and device for direct current system | |
| CN102928722A (en) | Detection method for the cause of jumping blocking relay misoperation caused by power frequency AC interference in substation | |
| CN206235698U (en) | A kind of electric network single-phase earth fault differentiates, isolates and resultant fault anticipation device | |
| CN117741338A (en) | Fault detection system and method for high-voltage circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20110626 |