CN105576615A - Neutral bus switch failure (NBSF) logic verification method - Google Patents
Neutral bus switch failure (NBSF) logic verification method Download PDFInfo
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- CN105576615A CN105576615A CN201511022509.7A CN201511022509A CN105576615A CN 105576615 A CN105576615 A CN 105576615A CN 201511022509 A CN201511022509 A CN 201511022509A CN 105576615 A CN105576615 A CN 105576615A
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- nbs
- switch
- nbsf
- current transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
Abstract
The invention relates to a neutral bus switch failure (NBSF) logic verification method. The NBSF logic verification method is characterized by comprising the following steps of (1) manually arranging a metallic grounding point between a neutral bus switch (NBS) in abnormal operation and a current transformer T2, and synchronously triggering a metallic grounding fault during fault pole blocking so that current flows to the ground from the grounding point between the NBS and the T2; and (2) additionally arranging a current transformer T1 at a fracture of a neutral bus DC circuit breaker NBS, allowing the current IDNE to flow through the current transformer T2 and the current INBS to flow through the current transformer T1 during the pole isolation process, judging a switch partial phase of the NBS by a neutral bus switch protect (NBSP), and starting an NBSF logic when the current INBS or IDNE is larger than a fixed value. The method disclosed by the invention can be used for a system debugging test stage of a DC commutation station, the fault arcing of a DC switch during the pole isolation process is simulated, the NBS DC circuit breaker cannot be normally pulled, and thus, the NBSF logic is started.
Description
Technical field
The present invention relates to a kind of method of NBSF logic checking.
Background technology
Ultra-high voltage converter station Control protection logic is many and complicated, each logic will carry out detailed functional verification in the system debug stage, such as UHVDC converter station may start NBSF (Neutralbusswitchfailure) logic in the isolation processes of pole, in the isolation processes of pole, pole neutral bus current transformer T2 can flow through electric current I DNE, switch NBS (NeutralBusSwitch) incision position current transformer T1 can flow through high-frequency resonant electric current I NBS, when arbitrary electric current is greater than protection definite value 75A, pole neutral bus switch protection NBSP (NeutralBusSwitchProtect) can take different delayed time to export coincidence NBS switch, start NBSF logic, close station in temporary grounding pole switch NBGS (NeutralBusGroundingSwitch), if now earth electrode switch NBGS switch over-current protection act, then can locking bipolar, namely jump and run pole.So the correctness of checking NBSF action logic, the accuracy of time cooperation is very necessary, also extremely important.
Summary of the invention
The object of this invention is to provide a kind of method of NBSF logic checking, DC switch fault arcing in the isolation processes of pole can be simulated and cause cannot normally pulling open NBS DC circuit breaker, thus start NBSF logic.
A method for NBSF logic checking, its special feature is, comprises the steps:
(1) metallic earthing point is artificially set between abnormal running pole neutral bus switch NBS and the second current transformer, synchronously triggers this metallic earthing fault during the locking of fault pole and make electric current flow into the earth from the earth point between switch NBS and the second current transformer;
(2) first current transformer is increased at neutral bus DC circuit breaker NBS incision position; in the isolation processes of pole, electric current I DNE flows through the second current transformer; electric current I NBS flows through the first current transformer; NBS switch protection NBSP criterion judges that NBS switch divides position and non-co-bit state; and electric current I NBS or IDNE is when being greater than definite value; NBS switch protection takes different delayed time to export, thus starts NBSF logic.
The inventive method by artificially arranging metallic earthing point between abnormal running pole neutral bus switch NBS (NeutralBusSwitch) and the second current transformer, synchronously triggering this metallic earthing fault during the locking of fault pole makes electric current flow into the earth from the earth point between NBS and the second current transformer, this external neutral bus DC circuit breaker NBS incision position increases by first current transformer, in the isolation processes of pole, electric current I DNE flows through the second current transformer, electric current I NBS flows through the first current transformer, NBS switch protection NBSP (NeutralBusSwitchProtect) criterion judges that NBS switch divides position (non-co-bit state), and electric current I NBS or IDNE is when being greater than definite value 75A, NBS switch protection takes different delayed time to export, start NBSF logic, the correctness of checking NBSF logic, can be applicable to DC converter station system debug experimental stage.
Accompanying drawing explanation
Accompanying drawing 1 is principle schematic of the present invention;
Accompanying drawing 2 is principle schematic of the present invention.
Embodiment
Embodiment 1:
Method of the present invention can be applicable to DC converter station system debug experimental stage, and analog DC switch is fault arcing in the isolation processes of pole, normally cannot pull open NBS (NeutralBusSwitch) DC circuit breaker, thus starts NBSF logic.
As Fig. 1, shown in Fig. 2, between pole 1 neutral line second current transformer T2 and neutral bus DC switch NBS, metallic earthing point is set, before fault, bipolar Ground return mode is normally run, synchronously triggering this metallic earthing fault during 1 locking of pole makes electric current flow into the earth from the earth point between NBS and the second current transformer T2, arc is pulled when NBS switch pulls open in the isolation processes of pole in pole 1, residual current INBS flows through NBS (NeutralBusSwitch) switch incision position first current transformer T1, now electric current I DNE is flow through by loop 02001 isolating switch-01001 isolating switch-the second current transformer T2-earth point in pole 2, after electric current I NBS or IDNE is greater than definite value, NBSP protection takes different delayed time action to export, coincidence NBS, start NBSF logic, close the interior temporary grounding pole switch NBGS in station, pull open neutral bus isolating switch 01001 and 01002, isolation earth fault, be successfully completed the isolation of fault pole 1.Success in Experiment demonstrates the correctness of NBSF logical action, also demonstrates in the process that NBGS closes, the correctness of time cooperation, and not overcurrent in NBGS closing course, locking runs pole.
Particular content of the present invention is:
1, the situation cannot simulating the arcing of NBS DC switch fault in experiment is proposed;
2, increase by the first current transformer T1 at NBS switch incision position, gather the electric current I NBS in the isolation processes of pole;
3, as shown in Figure 1 and Figure 2; between neutral bus DC switch NBS and neutral bus second current transformer T2, metallic earthing fault is set; synchronously triggering this metallic earthing fault during the locking of fault pole makes electric current flow into the earth from the earth point between NBS and the second current transformer T2; NBSP switch protection is sentenced NBS switch point position (non-co-bit state) and is had enough big current to flow through the first current transformer T1 or the second current transformer T2; namely think that scene exists the situation of NBS switch fault arcing, thus start NBSF logic.
Claims (1)
1. a method for NBSF logic checking, is characterized in that, comprises the steps:
(1) metallic earthing point is artificially set between abnormal running pole neutral bus switch NBS and the second current transformer (T2), synchronously triggers this metallic earthing fault during the locking of fault pole and make electric current flow into the earth from the earth point between switch NBS and the second current transformer (T2);
(2) first current transformer (T1) is increased at neutral bus DC circuit breaker NBS incision position; in the isolation processes of pole, electric current I DNE flows through the second current transformer (T2); electric current I NBS flows through the first current transformer (T1); NBS switch protection NBSP criterion judges that NBS switch divides position and non-co-bit state; and electric current I NBS or IDNE is when being greater than definite value; NBS switch protection takes different delayed time to export, thus starts NBSF logic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511022509.7A CN105576615B (en) | 2015-12-31 | 2015-12-31 | A kind of method of NBSF logic checkings |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511022509.7A CN105576615B (en) | 2015-12-31 | 2015-12-31 | A kind of method of NBSF logic checkings |
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| CN105576615A true CN105576615A (en) | 2016-05-11 |
| CN105576615B CN105576615B (en) | 2018-08-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1877948A (en) * | 2006-06-28 | 2006-12-13 | 南京南瑞继保电气有限公司 | Method for implementing electrode isolation of super-high voltage DC system under the condition of dipolar operation and monopolar fault by using phase shifting |
| CN103022988A (en) * | 2011-09-22 | 2013-04-03 | 国网运行有限公司上海超高压管理处 | High-voltage direct-current power transmission system |
| US20130114314A1 (en) * | 2011-11-03 | 2013-05-09 | Abb Technology Ag | Converter system and power electronic system comprising such converter systems |
| CN103257582A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Direct-current control protection simulation device based on RTDS |
| CN103872657A (en) * | 2014-03-19 | 2014-06-18 | 许继集团有限公司 | Metal loop wire longitudinal differential protection method in parallel-connection ice melting mode |
-
2015
- 2015-12-31 CN CN201511022509.7A patent/CN105576615B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1877948A (en) * | 2006-06-28 | 2006-12-13 | 南京南瑞继保电气有限公司 | Method for implementing electrode isolation of super-high voltage DC system under the condition of dipolar operation and monopolar fault by using phase shifting |
| CN103022988A (en) * | 2011-09-22 | 2013-04-03 | 国网运行有限公司上海超高压管理处 | High-voltage direct-current power transmission system |
| US20130114314A1 (en) * | 2011-11-03 | 2013-05-09 | Abb Technology Ag | Converter system and power electronic system comprising such converter systems |
| CN103257582A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Direct-current control protection simulation device based on RTDS |
| CN103872657A (en) * | 2014-03-19 | 2014-06-18 | 许继集团有限公司 | Metal loop wire longitudinal differential protection method in parallel-connection ice melting mode |
Non-Patent Citations (1)
| Title |
|---|
| 刘博等: "哈密南-郑州±800kV特高压直流输电工程接地极线路参数测量及分析", 《高压电器》 * |
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| CN105576615B (en) | 2018-08-03 |
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