CN1543032A - Circuit longitudinal differential protection braking curve and closed locking angle testing method - Google Patents
Circuit longitudinal differential protection braking curve and closed locking angle testing method Download PDFInfo
- Publication number
- CN1543032A CN1543032A CNA2003101035194A CN200310103519A CN1543032A CN 1543032 A CN1543032 A CN 1543032A CN A2003101035194 A CNA2003101035194 A CN A2003101035194A CN 200310103519 A CN200310103519 A CN 200310103519A CN 1543032 A CN1543032 A CN 1543032A
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- Prior art keywords
- differential protection
- braking curve
- locking angle
- phase
- longitudinal differential
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- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 230000001681 protective effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
This invention relates to a test technology for the brake curve and locking angle in a circuit pilot differential protection of the power system. The circuit pilot differential protection device is set with a brake curve and a locking angle test mode, only one device is needed for inputting current to finish the test when the test begins and enters into the said mode.
Description
Technical field
Present technique belongs to field of relay protection in power, relates in particular to braking curve and the examination of locking angular measurement that the differential protection between the transformer station is done.
Background technology
In transformer station's design of electric power system, for the correctness of verifying software design, the permission amplitude error nargin and the permission phase error nargin of check differential criterion, differential protection need be done braking curve and the test of locking angle usually.At present, circuit longitudinal differential protection must use two table apparatus (three end systems must use three table apparatus) when doing this test, as shown in Figure 1, be example with two end systems, and way is as follows:
1, braking curve test: the electric current of table apparatus input is IM, and the electric current of another table apparatus input is IN, gets IM=IN, phase difference α=180 °, and fixedly IM is constant, progressively increases IN, until till protection moves,
Restraint coefficient K=|IM-IN|/| IM+IN|
2, locking angle test: the electric current of table apparatus input is IM, and the electric current of another table apparatus input is IN, gets IM=IN; phase difference α=180 °, fixedly the amplitude of IM and IN is constant, progressively reduces phase difference α; until till the protection action, locking angle β=180 °-α.
Can see from above process of the test, must use the differential protection of two same types, not have reserve arrangement in the general transformer station, so braking curve and the experiment of locking angle can't be carried out.
Summary of the invention
When doing braking curve and the test of locking angle at the scene, must use the limitation of the differential protection of two same types, propose the present invention for solving the circuit longitudinal differential protection device.
Main contents of the present invention are: the circuit longitudinal differential protection device is provided with braking curve and locking angle test model; when doing the test of the braking curve of differential protection and locking angle at the scene; enter this pattern; an as long as table apparatus input current; just can finish the experiment of braking curve and locking angle, very convenient.
Description of drawings
Fig. 1 example conventional braking curve and locking angle experiment schematic diagram, wherein (a) is two end systems, (b) is three end systems;
Fig. 2 example braking curve of the present invention and locking angle experiment model schematic diagram, wherein (a) is two end systems, (b) is three end systems;
Fig. 3 example braking curve experiment model flow chart of the present invention;
Fig. 4 example locking of the present invention angle experiment model flow chart.
Specific embodiments
Be provided with a function selecting position in the definite value of circuit longitudinal differential protection device, can select whether to enter braking curve and locking angle test model.Because electric power system is a three-phase system; so protective device has A, B, C three-phase current input port; the present invention with the A phase current IA of this side device as this side electric current I M; with the B phase current IB of this side device as offside electric current I N; with the C phase current IC of this side device as the 3rd side electric current I T; by changing amplitude and the phase place of IA, IB, IC, just can on this side one table apparatus, do the braking curve and the test of locking angle of three end systems like this.For two end systems, only need to use A phase current IA as this side electric current I M, as offside electric current I N, the C phase current can not insert, and as shown in Figure 2, is example with two end systems with B phase current IB, and implementation process is as follows:
1, braking curve test: (1) this side device input A phase current IA is as this side electric current, and input B phase current IB is as the offside electric current.(2) get IA=IB, phase difference α=180 °, fixedly IA and α are constant.(3) increase IB.(4) if protective device is failure to actuate, repeated for (3) step; If the protective device action entered for (5) step.(5) calculate restraint coefficient K=|IA-IB|/| IA+IB|.(6) braking curve off-test.
2, locking angle test: (1) this side device input A phase current IA is as this side electric current, and input B phase current IB is as the offside electric current.(2) get IA=IB, phase difference α=180 °, fixedly IA and IB are constant.(3) reduce α.(4) if protective device is failure to actuate, repeated for (3) step; If the protective device action entered for (5) step.(5) calculate locking angle β=180 °-α.(6) locking angle off-test.
Claims (2)
1, the method for testing that is used for the braking curve of circuit longitudinal differential protection device in a kind of electric power system; has the braking curve test pattern in the definite value of described circuit longitudinal differential protection device; described electric power system is a three-phase system; A, B, C three-phase current input port corresponding to protective device; at least comprise this survey device of testing transformer station, the method comprising the steps of:
This survey device enters the braking curve test pattern: (1) this side device input A phase current IA is as this side electric current, and input B phase current IB is as the offside electric current.(2) get IA=IB, phase difference α=180 °, fixedly IA and α are constant.(3) increase IB.(4) if protective device is failure to actuate, repeated for (3) step; If the protective device action entered for (5) step.(5) calculate restraint coefficient K=|IA-IB|/| IA+IB|.(6) braking curve off-test.
2, the method for testing that is used for the locking angle of circuit longitudinal differential protection device in a kind of electric power system; has locking angular measurement die trial formula in the definite value of described circuit longitudinal differential protection device; described electric power system is a three-phase system; A, B, C three-phase current input port corresponding to protective device; at least comprise this survey device of testing transformer station, the method comprising the steps of:
This survey device enters locking angular measurement die trial formula: (1) this side device input A phase current IA is as this side electric current, and input B phase current IB is as the offside electric current.(2) get IA=IB, phase difference α=180 °, fixedly IA and IB are constant.(3) reduce α.(4) if protective device is failure to actuate, repeated for (3) step; If the protective device action entered for (5) step.(5) calculate locking angle β=180 °-α.(6) locking angle off-test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101035194A CN100353630C (en) | 2003-11-06 | 2003-11-06 | Circuit longitudinal differential protection braking curve and closed locking angle testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101035194A CN100353630C (en) | 2003-11-06 | 2003-11-06 | Circuit longitudinal differential protection braking curve and closed locking angle testing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1543032A true CN1543032A (en) | 2004-11-03 |
| CN100353630C CN100353630C (en) | 2007-12-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101035194A Expired - Lifetime CN100353630C (en) | 2003-11-06 | 2003-11-06 | Circuit longitudinal differential protection braking curve and closed locking angle testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100353630C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459356C (en) * | 2006-06-16 | 2009-02-04 | 天津大学 | Split-phase current phase differential protecting method for extra-high voltage transmission line |
| CN114221307A (en) * | 2021-12-09 | 2022-03-22 | 南京南瑞继保电气有限公司 | Line differential protection braking coefficient adjusting method and device and electronic equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3575171B2 (en) * | 1996-06-19 | 2004-10-13 | 株式会社明電舎 | Testing method of optical PCM current differential relay with representative end judgment method |
| FR2774822B1 (en) * | 1998-02-11 | 2000-03-17 | Schneider Electric Ind Sa | DIFFERENTIAL PROTECTION DEVICE |
| US6518767B1 (en) * | 2000-10-19 | 2003-02-11 | Schweitzer Engineering Laboratories, Inc. | Line differential protection system for a power transmission line |
-
2003
- 2003-11-06 CN CNB2003101035194A patent/CN100353630C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459356C (en) * | 2006-06-16 | 2009-02-04 | 天津大学 | Split-phase current phase differential protecting method for extra-high voltage transmission line |
| CN114221307A (en) * | 2021-12-09 | 2022-03-22 | 南京南瑞继保电气有限公司 | Line differential protection braking coefficient adjusting method and device and electronic equipment |
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| Publication number | Publication date |
|---|---|
| CN100353630C (en) | 2007-12-05 |
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Owner name: BEIJING SIFANG JIBAO AUTOMATION CO., LTD. Free format text: FORMER NAME OR ADDRESS: SIFANG JIBAO AUTOMATION CO., LTD., BEIJING |
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Address after: No. four, 9 street, information industry base, Haidian District, Beijing Patentee after: BEIJING SIFANG AUTOMATION Co.,Ltd. Address before: No. four, 9 street, information industry base, Haidian District, Beijing Patentee before: Beijing Sifang Automation Co.,Ltd. |
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Effective date of registration: 20190321 Address after: 100085 9, four street, Shang Di information industry base, Haidian District, Beijing. Co-patentee after: BEIJING SIFANG ENGINEERING Co.,Ltd. Patentee after: BEIJING SIFANG AUTOMATION Co.,Ltd. Address before: 100085 9, four street, Shang Di information industry base, Haidian District, Beijing. Patentee before: BEIJING SIFANG AUTOMATION Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
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Granted publication date: 20071205 |