CN1543033A - Far loopback testing technique for circuit longitudinal differential protection - Google Patents
Far loopback testing technique for circuit longitudinal differential protection Download PDFInfo
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- CN1543033A CN1543033A CNA2003101035207A CN200310103520A CN1543033A CN 1543033 A CN1543033 A CN 1543033A CN A2003101035207 A CNA2003101035207 A CN A2003101035207A CN 200310103520 A CN200310103520 A CN 200310103520A CN 1543033 A CN1543033 A CN 1543033A
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- side device
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- loopback
- differential protection
- distant place
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims description 9
- 238000004088 simulation Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
This invented power system circuit pilot differential protection test technology is to design a normal operation mode and a remote circular test mode in a circuit pilot differential protection device. When the differential protection bandpass test is made at site, device can finish the short circuit fault tests of various regions so long as to input the fault current to this device and enter into the remote circular test mode.
Description
Technical field
Present technique belongs to field of relay protection in power, relates in particular to the differential protection tape channel test between the transformer station.
Background technology
At present; the circuit longitudinal differential protection device adopts the both sides protective device to start simultaneously and satisfies the outlet of could tripping when tripping criterion; because two table apparatus are installed in two transformer stations; so when doing the test of differential protection tape channel at the scene; must apply fault current to device simultaneously in two transformer stations, just can finish and distinguish interior, external short-circuit Test to Failure.In the process of doing experiment, the testing crew of two transformer stations must be by telephone contact, the simultaneity of ability guarantee test.This test method is very inconvenient, needs two people, two cover test apparatuses just can carry out, and not only inefficiency, and time precision is not high yet.
Summary of the invention
Do the inconvenience of tape channel test at the scene for solving the circuit longitudinal differential protection device, improving continues protects commissioning staff's operating efficiency, improves test accuracy, has proposed the present invention.
Main contents of the present invention are: be provided with normal operation mode and distant place loopback test model in the circuit longitudinal differential protection device; when doing the test of differential protection tape channel at the scene; enter distant place loopback test model; as long as this side device input fault electric current; just can finish in the various districts, the external short-circuit Test to Failure; whether intact, can also test the offside device and whether whole communication port is intact if not only can test this side device.Offside transformer station can be unmanned, and the offside device need not any operation.
Description of drawings
Fig. 1 example forward distant place loopback test model schematic diagram;
Fig. 2 example reverse distant place loopback test model schematic diagram;
Fig. 3 example forward distant place loopback test model flow chart;
Fig. 4 example reverse distant place loopback test model flow chart.
Specific embodiments
Because the circuit longitudinal differential protection device has communication interface, can utilize on-the-spot communication port (optical-fibre channel or microwave channel) to communicate, not only can the transmission current data between the device of both sides, can also transmission command.Be provided with two function selecting positions in the definite value of circuit longitudinal differential protection device: can select forward distant place loopback test model and reverse distant place loopback test model, respectively interior, the external short-circuit Test to Failure of simulation region.Shown in accompanying drawing 1, accompanying drawing 3, district's build-in test implementation process is as follows:
1, this side device is made as forward distant place loopback test model: (1), this side device send " order of forward loopback " to the offside device.(2) after the offside device receives " order of forward loopback ", enter distant place forward wrapped state automatically.(3), this side device input fault electric current I M.(4), this side device sends fault current IM to the offside device.(5), after the offside device receives electric current I M, again IM is sent to this side device.(6) this side device receives the electric current I M that offside is sent back.(7) this side device calculates differential current 1CD=IM+IM=2IM, because differential current ICD is not equal to zero, is equivalent to troubles inside the sample space, and this side device is judged as troubles inside the sample space.(8) troubles inside the sample space off-test.
Shown in accompanying drawing 2, accompanying drawing 4, it is as follows to distinguish outer test implementation process:
2, this side device is made as reverse distant place loopback test model: (1), this side device send " oppositely loopback order " to the offside device.(2) after the offside device receives " oppositely loopback order ", enter the reverse wrapped state in a distant place automatically.(3), this side device input fault electric current I M.(4), this side device sends fault current IM to the offside device.(5), after the offside device receives electric current I M,, become and (IM), will (IM) send to this side device again the negate of IM phase place.(6) this side device receives electric current that offside sends back (IM).(7) (IM)=0, because differential current ICD equals zero, be equivalent to external area error, this side device is judged as external area error to this side device calculating differential current ICD=IM+.(8) external area error off-test.
Claims (2)
1, is used for the method that the circuit longitudinal differential protection device is tested in the electric power system; has forward distant place loopback test pattern in the definite value of described circuit longitudinal differential protection device; be used for simulation region internal short-circuit fault; described electric power system comprises this survey device and the offside device of testing transformer station at least, and the method comprising the steps of:
This side device enters forward distant place loopback test pattern: (1), this side device send " order of forward loopback " to the offside device.(2) after the offside device receives " order of forward loopback ", enter distant place forward wrapped state automatically.(3), this side device input fault electric current I M.(4), this side device sends fault current IM to the offside device.(5), after the offside device receives electric current I M, again IM is sent to this side device.(6) this side device receives the electric current I M that offside is sent back.(7) this side device calculates differential current ICD=IM+IM=2IM, because differential current ICD is not equal to zero, is equivalent to troubles inside the sample space, and this side device is judged as troubles inside the sample space.(8) troubles inside the sample space off-test.
2, be used for the method that the circuit longitudinal differential protection device is tested; has reverse distant place loopback test pattern in the definite value of described circuit longitudinal differential protection device; be used for simulation region external short circuit fault; described electric power system comprises this survey device and the offside device of testing transformer station at least, and the method comprising the steps of:
This side device enters reverse distant place loopback test model: (1) this side device sends " oppositely loopback order " to the offside device.(2) after the offside device receives " oppositely loopback order ", enter the reverse wrapped state in a distant place automatically.(3), this side device input fault electric current I M.(4), this side device sends fault current IM to the offside device.(5), after the offside device receives electric current I M,, become and (IM), will (IM) send to this side device again the negate of IM phase place.(6) this side device receives electric current that offside sends back (IM).(7) (IM)=0, because differential current ICD equals zero, be equivalent to external area error, this side device is judged as external area error to this side device calculating differential current ICD=IM+.(8) external area error off-test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101035207A CN100379110C (en) | 2003-11-06 | 2003-11-06 | Far loopback testing technique for circuit longitudinal differential protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101035207A CN100379110C (en) | 2003-11-06 | 2003-11-06 | Far loopback testing technique for circuit longitudinal differential protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1543033A true CN1543033A (en) | 2004-11-03 |
| CN100379110C CN100379110C (en) | 2008-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101035207A Expired - Lifetime CN100379110C (en) | 2003-11-06 | 2003-11-06 | Far loopback testing technique for circuit longitudinal differential protection |
Country Status (1)
| Country | Link |
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| CN (1) | CN100379110C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375357C (en) * | 2005-10-26 | 2008-03-12 | 许继集团有限公司 | Double end testing method in power transmission line longitudinal difference protection |
| CN100388694C (en) * | 2005-11-08 | 2008-05-14 | 杭州华三通信技术有限公司 | Loopback testing method |
| CN101867170A (en) * | 2010-06-09 | 2010-10-20 | 江苏省电力试验研究院有限公司 | Fibre channel protector test method for simulating system failure and channel abnormal simultaneously |
| CN103389422A (en) * | 2013-07-19 | 2013-11-13 | 国家电网公司 | Method for detecting non-fault phase busbar differential protection maloperation cause during circuit reclosing period |
| CN104267276A (en) * | 2014-09-23 | 2015-01-07 | 中冶天工上海十三冶建设有限公司 | Method for inspecting high-voltage motor longitudinal differential protection by means of low-voltage locked-rotor currents |
| CN104730381A (en) * | 2015-03-02 | 2015-06-24 | 国家电网公司 | Line longitudinal current differential protection self-healing channel usability test method |
| CN107505563A (en) * | 2017-09-14 | 2017-12-22 | 青海送变电工程公司 | A kind of test method of optical difference protection joint debugging |
| CN114264996A (en) * | 2021-11-30 | 2022-04-01 | 上海御渡半导体科技有限公司 | Method for detecting DC calibration effectiveness of ATE equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2583930B1 (en) * | 1985-06-25 | 1994-02-25 | Enertec | METHOD AND DEVICE FOR CONTROLLING THE TRANSMISSION OF DIFFERENTIAL PROTECTION SIGNALS |
| SE469735B (en) * | 1992-02-12 | 1993-08-30 | Asea Brown Boveri | PROCEDURE TO PREVENT OVERSTABILIZATION OF LONG DIFFERENTIAL PROTECTION BY INTERNAL FAILURE ON POWER LINES AND DEVICE FOR IMPLEMENTATION OF THE PROCEDURE |
| US6501631B1 (en) * | 2000-04-14 | 2002-12-31 | Abb Ab | Method and device for power system protection |
-
2003
- 2003-11-06 CN CNB2003101035207A patent/CN100379110C/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375357C (en) * | 2005-10-26 | 2008-03-12 | 许继集团有限公司 | Double end testing method in power transmission line longitudinal difference protection |
| CN100388694C (en) * | 2005-11-08 | 2008-05-14 | 杭州华三通信技术有限公司 | Loopback testing method |
| CN101867170A (en) * | 2010-06-09 | 2010-10-20 | 江苏省电力试验研究院有限公司 | Fibre channel protector test method for simulating system failure and channel abnormal simultaneously |
| CN101867170B (en) * | 2010-06-09 | 2012-11-21 | 江苏省电力试验研究院有限公司 | Fibre channel protector test method for simulating system failure and channel abnormal simultaneously |
| CN103389422A (en) * | 2013-07-19 | 2013-11-13 | 国家电网公司 | Method for detecting non-fault phase busbar differential protection maloperation cause during circuit reclosing period |
| CN103389422B (en) * | 2013-07-19 | 2016-06-29 | 国家电网公司 | The detection method of healthy phases bus differential protection reason of false action during circuit re-switching |
| CN104267276B (en) * | 2014-09-23 | 2017-03-29 | 中冶天工上海十三冶建设有限公司 | Method high-tension motor longitudinal differential protection checked with low pressure locked rotor current |
| CN104267276A (en) * | 2014-09-23 | 2015-01-07 | 中冶天工上海十三冶建设有限公司 | Method for inspecting high-voltage motor longitudinal differential protection by means of low-voltage locked-rotor currents |
| CN104730381A (en) * | 2015-03-02 | 2015-06-24 | 国家电网公司 | Line longitudinal current differential protection self-healing channel usability test method |
| CN104730381B (en) * | 2015-03-02 | 2017-08-01 | 国家电网公司 | The circuit longitudinal current differential protection self-healing channel availabity method of inspection |
| CN107505563A (en) * | 2017-09-14 | 2017-12-22 | 青海送变电工程公司 | A kind of test method of optical difference protection joint debugging |
| CN107505563B (en) * | 2017-09-14 | 2020-01-07 | 青海送变电工程公司 | Testing method for optical difference protection joint debugging |
| CN114264996A (en) * | 2021-11-30 | 2022-04-01 | 上海御渡半导体科技有限公司 | Method for detecting DC calibration effectiveness of ATE equipment |
| CN114264996B (en) * | 2021-11-30 | 2024-05-03 | 上海御渡半导体科技有限公司 | ATE equipment DC calibration effectiveness detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100379110C (en) | 2008-04-02 |
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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: 20190322 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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