CN202678928U - Device for arc extinction, resonance elimination, wire selection and overvoltage protection - Google Patents
Device for arc extinction, resonance elimination, wire selection and overvoltage protection Download PDFInfo
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- CN202678928U CN202678928U CN 201220361317 CN201220361317U CN202678928U CN 202678928 U CN202678928 U CN 202678928U CN 201220361317 CN201220361317 CN 201220361317 CN 201220361317 U CN201220361317 U CN 201220361317U CN 202678928 U CN202678928 U CN 202678928U
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Abstract
The utility model relates to a device for arc extinction, resonance elimination, wire selection and overvoltage protection, relating to the technical fields of arc extinction, resonance elimination and wire selection for three-phase non-direct-grounding power systems. The device is composed of a high-voltage isolation switch, a high-voltage current-limiting fuse protector, a voltage transformer, a three-phase overvoltage protector, a split-phase control high-voltage vacuum contactor and a microcomputer arc extinction controller, wherein the microcomputer arc extinction controller is used as a core control part to judge fault phases and fault types according to signals Ua, Ub, Uc and Udelta provided by the voltage transformer, and control the split-phase control high-voltage vacuum contactor, and when Udelta becomes high level from low level, a low-current wire selection module in the microcomputer arc extinction controller selects a fault line according to the principle that an abrupt change value of the fault line is maximal before and after extinction of ground arc by carrying out data collection on zero-sequence current of all lines, and simultaneously outputs passive switching value contact signals. The device disclosed by the utility model is high in action speed and high in wire selection accuracy.
Description
Technical field
The utility model relates to three-phase non_direct ground electric power system extinguishing arc, harmonic elimination, route selection technical field.
Background technology
In the at present 3-35KV three-phase non_direct ground electric power system; because all kinds of overvoltage protection devices are without extinguishing arc, harmonic elimination and route selection function; or function singleness; thereby the accidents such as Explosion of on Arrester that can not effectively avoid the phase fault that causes because of single-phase earthing and cause because of the arc grounding overvoltage; and line selection apparatus route selection speed is slow and during arc grounding low, the long resonance overvoltage of route selection accuracy rate to the reasons such as accelerated ageing of power system insulation structure, all to life-span and the certain threat of security of operation formation of power system device.
The utility model content
The purpose of this utility model provides a kind of quick action, the route selection accuracy rate is high, the extinguishing arc that cost is low, harmonic elimination, route selection and overvoltage protection.
In order to solve existing problem in the background technology, the utility model is by the following technical solutions: it comprises high voltage isolator GN, high-voltage and current-limitation fuse FU, voltage transformer pt, three-phase overvoltage protection device HK, minute phase control high pressure vacuum contactor JZ, microcomputer arc extinguishing controller ZK;
Described microcomputer arc extinguishing controller ZK comprises voltage transformer control end, minute phase control high pressure vacuum contactor control end;
The three-phase port of described three-phase overvoltage protection device HK meets respectively three-phase high-voltage isolating switch GN; three-phase overvoltage protection device HK earth terminal ground connection; the three-phase port of voltage transformer pt meets respectively three-phase high-voltage isolating switch GN; another termination voltage transformer control end; the three-phase port of high-voltage and current-limitation fuse FU meets respectively three-phase high-voltage isolating switch GN; another termination phase-splitting control high pressure vacuum contactor JZ; divide another termination phase-splitting control high pressure vacuum contactor control end of phase control high pressure vacuum contactor JZ, minute phase control high pressure vacuum contactor JZ earth terminal ground connection.
When system normally moves, the open delta both end voltage U of voltage transformer pt
ΔVery little, microcomputer arc extinguishing controller ZK does not work, when system breaks down, and U
ΔCan become high level by low level, this moment, microcomputer arc extinguishing controller ZK started interruption immediately, carried out fault type and separate judgement according to voltage transformer pt secondary output signal U a, Ub, Uc:
If the single-phase wire break fault is then installed the separate and disconnection signal of demonstration fault on the panel, and output passive switch amount contact point signal;
If single phase ground fault then sends the order of closing a floodgate to the fault phase vacuum contactor, and output passive switch amount contact point signal;
If be used for take overhead transmission line as main electrical network, fault phase vacuum contactor automatic brake separating behind the 5s after then microcomputer arc extinguishing controller ZK moves, if be instantaneity earth fault, then system recovers normal, if be permanent earth fault, then microcomputer arc extinguishing controller ZK moves rear fault phase vacuum contactor again not at separating brake;
U
ΔWhen becoming high level by low level, small current line selection module among the microcomputer arc extinguishing controller ZK is carried out data acquisition to the zero-sequence current of each bar circuit immediately, if without single phase ground fault, then recover normal operation, if generation single phase ground fault, then close a floodgate at the fault phase vacuum contactor and also again the circuit zero-sequence current is carried out Data Collection after the extinguish arcs, principle according to faulty line Sudden Changing Rate maximum before and after ground arc extinguishes, select faulty line and show the fault wire size at panel, export simultaneously passive switch amount contact point signal.
Extinguishing arc of the present utility model, harmonic elimination, route selection and overvoltage protection, take the microcomputer arc extinguishing controller as core control part, Ua, the Ub, Uc, the U that provide according to voltage transformer
ΔSignal judge the separate and fault type of fault, control a minute phase control high pressure vacuum contactor according to the mode of setting, work as U
ΔWhen becoming high level by low level, small current line selection module in the microcomputer arc extinguishing controller is carried out Data Collection by the zero-sequence current to each bar circuit, according to the principle of faulty line maximum of Sudden Changing Rate before and after ground arc extinguishes, select faulty line and export simultaneously passive switch amount contact point signal.Thereby the utility model quick action, route selection accuracy rate height have effectively solved the problems such as extinguishing arc in the overvoltage protection, harmonic elimination, route selection.
Description of drawings
Fig. 1 is electrical schematic diagram of the present utility model
Embodiment
Referring to Fig. 1, a kind of extinguishing arc, harmonic elimination, route selection and overvoltage protection, it comprises high voltage isolator GN, high-voltage and current-limitation fuse FU, voltage transformer pt, three-phase overvoltage protection device HK, minute phase control high pressure vacuum contactor JZ, microcomputer arc extinguishing controller ZK;
Described microcomputer arc extinguishing controller ZK comprises voltage transformer control end, minute phase control high pressure vacuum contactor control end;
The three-phase port of described three-phase overvoltage protection device HK meets respectively three-phase high-voltage isolating switch GN; three-phase overvoltage protection device HK earth terminal ground connection; the three-phase port of voltage transformer pt meets respectively three-phase high-voltage isolating switch GN; another termination voltage transformer control end; the three-phase port of high-voltage and current-limitation fuse FU meets respectively three-phase high-voltage isolating switch GN; another termination phase-splitting control high pressure vacuum contactor JZ; divide another termination phase-splitting control high pressure vacuum contactor control end of phase control high pressure vacuum contactor JZ, minute phase control high pressure vacuum contactor JZ earth terminal ground connection.
When system normally moves, the open delta both end voltage U of voltage transformer pt
ΔVery little, microcomputer arc extinguishing controller ZK does not work, when system breaks down, and U
ΔCan become high level by low level, this moment, microcomputer arc extinguishing controller ZK started interruption immediately, carried out fault type and separate judgement according to voltage transformer pt secondary output signal U a, Ub, Uc:
If the single-phase wire break fault is then installed the separate and disconnection signal of demonstration fault on the panel, and output passive switch amount contact point signal;
If single phase ground fault then sends the order of closing a floodgate to the fault phase vacuum contactor, and output passive switch amount contact point signal;
If be used for take overhead transmission line as main electrical network, fault phase vacuum contactor automatic brake separating behind the 5s after then microcomputer arc extinguishing controller ZK moves, if be instantaneity earth fault, then system recovers normal, if be permanent earth fault, then microcomputer arc extinguishing controller ZK moves rear fault phase vacuum contactor again not at separating brake;
U
ΔWhen becoming high level by low level, small current line selection module among the microcomputer arc extinguishing controller ZK is carried out data acquisition to the zero-sequence current of each bar circuit immediately, if without single phase ground fault, then recover normal operation, if generation single phase ground fault, then close a floodgate at the fault phase vacuum contactor and also again the circuit zero-sequence current is carried out Data Collection after the extinguish arcs, principle according to faulty line Sudden Changing Rate maximum before and after ground arc extinguishes, select faulty line and show the fault wire size at panel, export simultaneously passive switch amount contact point signal.
Extinguishing arc of the present utility model, harmonic elimination, route selection and overvoltage protection, take the microcomputer arc extinguishing controller as core control part, Ua, the Ub, Uc, the U that provide according to voltage transformer
ΔSignal judge the separate and fault type of fault, control a minute phase control high pressure vacuum contactor according to the mode of setting, work as U
ΔWhen becoming high level by low level, small current line selection module in the microcomputer arc extinguishing controller is carried out Data Collection by the zero-sequence current to each bar circuit, according to the principle of faulty line maximum of Sudden Changing Rate before and after ground arc extinguishes, select faulty line and export simultaneously passive switch amount contact point signal.Thereby the utility model quick action, route selection accuracy rate height have effectively solved the problems such as extinguishing arc in the overvoltage protection, harmonic elimination, route selection.
Claims (1)
1. an extinguishing arc, harmonic elimination, route selection and overvoltage protection, it is characterized in that it comprises high voltage isolator (GN), high-voltage and current-limitation fuse (FU), voltage transformer (PT), three-phase overvoltage protection device (HK), minute phase control high pressure vacuum contactor (JZ), microcomputer arc extinguishing controller (ZK);
Described microcomputer arc extinguishing controller (ZK) comprises voltage transformer control end, minute phase control high pressure vacuum contactor control end;
The three-phase port of described three-phase overvoltage protection device (HK) connects respectively three-phase high-voltage isolating switch (GN); three-phase overvoltage protection device (HK) earth terminal ground connection; the three-phase port of voltage transformer (PT) connects respectively three-phase high-voltage isolating switch (GN); another termination voltage transformer control end; the three-phase port of high-voltage and current-limitation fuse (FU) connects respectively three-phase high-voltage isolating switch (GN); another termination phase-splitting control high pressure vacuum contactor (JZ); divide phase control high pressure vacuum contactor (JZ) another termination phase-splitting control high pressure vacuum contactor control end, minute phase control high pressure vacuum contactor (JZ) earth terminal ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220361317 CN202678928U (en) | 2012-07-19 | 2012-07-19 | Device for arc extinction, resonance elimination, wire selection and overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220361317 CN202678928U (en) | 2012-07-19 | 2012-07-19 | Device for arc extinction, resonance elimination, wire selection and overvoltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678928U true CN202678928U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220361317 Expired - Fee Related CN202678928U (en) | 2012-07-19 | 2012-07-19 | Device for arc extinction, resonance elimination, wire selection and overvoltage protection |
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| CN (1) | CN202678928U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023462A (en) * | 2013-02-22 | 2014-09-03 | 通用电气公司 | System and apparatus for arc elimination |
| CN104078967A (en) * | 2014-06-11 | 2014-10-01 | 安徽三和电力技术有限公司 | Arc extinction, resonance elimination, line selection and over voltage protection system |
| WO2015035913A1 (en) * | 2013-09-16 | 2015-03-19 | 国家电网公司 | Single-phase grounding fault handling apparatus and method for power distribution network with non-effectively grounding neutral point |
| CN106786521A (en) * | 2016-12-13 | 2017-05-31 | 国网江苏省电力公司淮安供电公司 | A kind of power distribution network weakness branch road determination methods of meter and single-phase wire break resonance overvoltage |
| CN107247218A (en) * | 2017-07-20 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | A kind of distribution line fault type recognition method |
| CN111327033A (en) * | 2018-12-17 | 2020-06-23 | 安徽伟创电力科技有限公司 | Three-phase overvoltage protection device of arc extinction cabinet |
-
2012
- 2012-07-19 CN CN 201220361317 patent/CN202678928U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023462A (en) * | 2013-02-22 | 2014-09-03 | 通用电气公司 | System and apparatus for arc elimination |
| US9697992B2 (en) | 2013-02-22 | 2017-07-04 | General Electric Company | System and apparatus for arc elimination |
| CN104023462B (en) * | 2013-02-22 | 2017-09-12 | 通用电气公司 | System and device for extinguishing arc |
| WO2015035913A1 (en) * | 2013-09-16 | 2015-03-19 | 国家电网公司 | Single-phase grounding fault handling apparatus and method for power distribution network with non-effectively grounding neutral point |
| CN104078967A (en) * | 2014-06-11 | 2014-10-01 | 安徽三和电力技术有限公司 | Arc extinction, resonance elimination, line selection and over voltage protection system |
| CN106786521A (en) * | 2016-12-13 | 2017-05-31 | 国网江苏省电力公司淮安供电公司 | A kind of power distribution network weakness branch road determination methods of meter and single-phase wire break resonance overvoltage |
| CN106786521B (en) * | 2016-12-13 | 2019-03-26 | 国网江苏省电力公司淮安供电公司 | It is a kind of meter and single-phase wire break resonance overvoltage power distribution network weakness branch judgment method |
| CN107247218A (en) * | 2017-07-20 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | A kind of distribution line fault type recognition method |
| CN111327033A (en) * | 2018-12-17 | 2020-06-23 | 安徽伟创电力科技有限公司 | Three-phase overvoltage protection device of arc extinction cabinet |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20140719 |
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| EXPY | Termination of patent right or utility model |