CN102496913B - Circuit test system and circuit test and protection method for direct-current traction power supply feeder unit - Google Patents
Circuit test system and circuit test and protection method for direct-current traction power supply feeder unit Download PDFInfo
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- CN102496913B CN102496913B CN201110416678.4A CN201110416678A CN102496913B CN 102496913 B CN102496913 B CN 102496913B CN 201110416678 A CN201110416678 A CN 201110416678A CN 102496913 B CN102496913 B CN 102496913B
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Abstract
The invention relates to a circuit test system and a circuit test and protection method for a direct-current (DC) traction power supply feeder unit, which are used for a city rail transit DC traction power supply system. The system comprises a quick circuit breaker Q00 and a microcomputer measurement and control protection device, wherein the quick circuit breaker Q00 is connected between a power supply network bus and a feeder and used for supplying power to a contact network or a contact rail; a circuit test contactor K05 is connected in parallel with the quick circuit breaker Q00 and connected in series with a circuit test resistor R05; and the microcomputer measurement and control protection device can receive and process bus voltage signals and feeder voltage signals from the bus side and the feeder side of the quick circuit breaker Q00. The system and the method have the advantages of simple circuit structure, high detection accuracy and low influence on equipment of a power supply network.
Description
Technical field
The present invention relates to a kind of for the direct-current traction power supply feeder unit circuit test system in urban track traffic DC traction power-supply system and line test and guard method.
Background technology
In the urban transportation, the big current etc. produced when line fault, vehicle start and stop is the key factor threatening safe operation all the time.Preventing direct current quick breaker from directly closing a floodgate in fault loop is the key factor run that ensures safety, and therefore the line test of direct-current traction power supply feeder unit has a wide range of applications in DC traction power-supply system.
The implementation of direct-current traction power supply feeder unit line test in prior art, is divided into two large classes: 1. small area analysis line test, 2. high-current test substantially.
Small area analysis line test can reduce the impact to traction power supply network to a certain extent, but is subject to external disturbance; Heavy current circuit test accuracy is high, but corresponding line test current-limiting resistance caloric value is large, and the reliability of equipment is affected.
Summary of the invention
The present invention want technical solution problem to be, provide that a kind of line construction is simple, accuracy in detection is high, power supply network equipment affected to little direct-current traction power supply feeder line single line test macro and line test and guard method.
Direct-current traction power supply feeder unit circuit test system of the present invention includes the high speed circuit breaker Q00 be connected between power supply network bus and feeder line, powers for giving contact line or conductor rail; High speed circuit breaker Q00 is other is parallel with a line test contactor K05, and line test contactor K05 connects with a line test resistance R05; This system also includes a microcomputer measuring and controlling protective device, and this device can receive and process bus voltage signal from high speed circuit breaker Q00 bus bar side and feeder line side and feeder voltage signal.
Direct-current traction power supply feeder unit of the present invention line test and guard method are: in said system, obtained busbar voltage Ur and the feeder voltage Uf of circuit, carry out treatment and analysis, specifically to it by microcomputer measuring and controlling protective device
(1) if busbar voltage Ur is not more than the circuit residual voltage Uf residue of setting, and feeder voltage Uf is not less than feeder line minimum Uf low, and illustrate that circuit powered by neighbour, circuit breaker can directly close a floodgate;
(2) if busbar voltage Ur is not less than feeder line minimum Uf low, and feeder voltage Uf is not less than feeder line minimum Uf low, illustrate that line side and bus bar side have normal voltage, now can check both voltage differences, if voltage difference is in normal allowed band, then circuit breaker can directly close a floodgate;
(3) if busbar voltage Ur is not more than the circuit residual voltage Uf residue of setting, and feeder voltage Uf is not more than feeder line minimum Uf low, illustrates without busbar voltage, and without feeder voltage, this situation circuit breaker can not close a floodgate;
(4) if busbar voltage Ur is not less than feeder line minimum Uf low, and feeder voltage Uf is not more than the circuit residual voltage Uf residue of setting, busbar voltage is normal, and feeder line side line road no-voltage, now needs start line road test contactor measurement circuitry resistance to judge that whether circuit is normal; Concrete method of testing is: line test contactor K05 is connected 1S, makes busbar voltage be applied to feeder line side by line test resistance R05, calculates feeder line side loop resistance Rre; Its computational methods are: Rre=900*Uf/ ((Ur-Uf) Rcalibration); In formula, Rcal ibration is circuit calibrating resistance, for the trueness error of compensated line test resistance itself;
If measure feeder line side loop resistance Rre to be not less than protection set point Rmin, then think feeder assembly fault-free, direct current quick breaker can directly close a floodgate; If measure feeder line side loop resistance Rre to be less than protection set point Rmin, be considered as line short, send locking high speed circuit breaker switching signal;
(5) except above situation, the combined floodgate of equal locking circuit breaker.
System and method line construction of the present invention is simple, accuracy in detection is high, affect little on power supply network equipment.
Accompanying drawing explanation
Fig. 1 is systematic schematic diagram of the present invention.
Embodiment
Direct-current traction power supply feeder unit circuit test system includes the high speed circuit breaker Q00 be connected between power supply network bus and feeder line as shown in the figure, powers for giving contact line or conductor rail; High speed circuit breaker Q00 is other is parallel with a line test contactor K05, and line test contactor K05 connects with a line test resistance R05; This system also includes a microcomputer measuring and controlling protective device, and this device can receive and process bus voltage signal from high speed circuit breaker Q00 bus bar side and feeder line side and feeder voltage signal.
Direct-current traction power supply feeder unit of the present invention line test and guard method are: in said system, obtained busbar voltage Ur and the feeder voltage Uf of circuit, carry out treatment and analysis, specifically to it by microcomputer measuring and controlling protective device
(1) if busbar voltage Ur is not more than the circuit residual voltage Uf residue of setting, and feeder voltage Uf is not less than feeder line minimum Uf low, and illustrate that circuit powered by neighbour, circuit breaker can directly close a floodgate;
(2) if busbar voltage Ur is not less than feeder line minimum Uf low, and feeder voltage Uf is not less than feeder line minimum Uf low, illustrate that line side and bus bar side have normal voltage, now can check both voltage differences, if voltage difference is in normal allowed band, then circuit breaker can directly close a floodgate;
(3) if busbar voltage Ur is not more than the circuit residual voltage Uf residue of setting, and feeder voltage Uf is not more than feeder line minimum Uf low, illustrates without busbar voltage, and without feeder voltage, this situation circuit breaker can not close a floodgate;
(4) if busbar voltage Ur is not less than feeder line minimum Uf low, and feeder voltage Uf is not more than the circuit residual voltage Uf residue of setting, busbar voltage is normal, and feeder line side line road no-voltage, now needs start line road test contactor measurement circuitry resistance to judge that whether circuit is normal; Concrete method of testing is: line test contactor K05 is connected 1S, makes busbar voltage be applied to feeder line side by line test resistance R05, calculates feeder line side loop resistance Rre; Its computational methods are: Rre=900*Uf/ ((Ur-Uf) Rcalibration); In formula, Rcal ibration is circuit calibrating resistance, for the trueness error of compensated line test resistance itself;
If measure feeder line side loop resistance Rre to be not less than protection set point Rmin, then think feeder assembly fault-free, direct current quick breaker can directly close a floodgate; If measure feeder line side loop resistance Rre to be less than protection set point Rmin, be considered as line short, send locking high speed circuit breaker switching signal;
(5) except above situation, the combined floodgate of equal locking circuit breaker.
Be applied in different electric pressure according to circuit test system of the present invention, corresponding component parameters is listed as follows:
Claims (1)
1. direct-current traction power supply feeder unit line test and guard method, it is characterized in that: comprise direct-current traction power supply feeder unit circuit test system, described direct-current traction power supply feeder unit circuit test system includes the high speed circuit breaker (Q00) be connected between power supply network bus and feeder line; It is characterized in that: high speed circuit breaker (Q00) is other is parallel with a line test contactor (K05), and line test contactor (K05) is connected with a line test resistance (R05); This system also includes a microcomputer measuring and controlling protective device, this device receives and processes the bus voltage signal from high speed circuit breaker (Q00) bus bar side, and this device also receives and process the feeder voltage signal from high speed circuit breaker (Q00) feeder line side;
In described direct-current traction power supply feeder unit circuit test system, obtained busbar voltage Ur and the feeder voltage Uf of circuit by microcomputer measuring and controlling protective device, treatment and analysis is carried out to it, specifically
(1) if busbar voltage Ur is not more than the circuit residual voltage Ufresidue of setting, and feeder voltage Uf is not less than feeder line minimum Uflow, and illustrate that circuit powered by neighbour, high speed circuit breaker (Q00) directly closes a floodgate;
(2) if busbar voltage Ur is not less than feeder line minimum Uflow, and feeder voltage Uf is not less than feeder line minimum Uflow, illustrate that line side and bus bar side have normal voltage, voltage difference both now checking, if voltage difference is in normal allowed band, then high speed circuit breaker (Q00) can directly close a floodgate;
(3) if busbar voltage Ur is not more than the circuit residual voltage Ufresidue of setting, and feeder voltage Uf is not more than feeder line minimum Uflow, illustrate without busbar voltage, without feeder voltage, this situation high speed circuit breaker (Q00) can not be closed a floodgate;
(4) if busbar voltage Ur is not less than feeder line minimum Uflow, and feeder voltage Uf is not more than the circuit residual voltage Uf residue of setting, busbar voltage is normal, and feeder line side line road no-voltage, now needs start line road test contactor measurement circuitry resistance to judge that whether circuit is normal; Concrete method of testing is: line test contactor (K05) is connected 1 second, makes busbar voltage be applied to feeder line side by line test resistance (R05), calculates feeder line side loop resistance Rre; Its computational methods are: Rre=900*Uf/ ((Ur-Uf) Rcalibration); In formula, Rcalibration is circuit calibrating resistance, for the trueness error of compensated line test resistance (R05) itself;
If measure feeder line side loop resistance Rre to be not less than protection set point Rmin, then think feeder assembly fault-free, high speed circuit breaker (Q00) directly closes a floodgate; If measure feeder line side loop resistance Rre to be less than protection set point Rmin, be considered as line short, send locking high speed circuit breaker (Q00) switching signal;
(5) except above situation, the combined floodgate of equal locking high speed circuit breaker (Q00).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110416678.4A CN102496913B (en) | 2011-12-14 | 2011-12-14 | Circuit test system and circuit test and protection method for direct-current traction power supply feeder unit |
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| CN201110416678.4A CN102496913B (en) | 2011-12-14 | 2011-12-14 | Circuit test system and circuit test and protection method for direct-current traction power supply feeder unit |
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| CN102496913A CN102496913A (en) | 2012-06-13 |
| CN102496913B true CN102496913B (en) | 2015-05-27 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311910B (en) * | 2013-05-29 | 2015-08-19 | 西南交通大学 | A kind of DC traction power-supply system and guard method |
| CN105004909A (en) * | 2015-07-16 | 2015-10-28 | 上海电机学院 | Monitoring system for auxiliary AC and DC power supply system for Multiple Units |
| CN109449049B (en) * | 2018-10-30 | 2020-03-31 | 中车南京浦镇车辆有限公司 | Feeder contactor control circuit based on subway vehicle |
| CN109286171B (en) * | 2018-11-14 | 2020-02-07 | 南京国电南自轨道交通工程有限公司 | Repeated tripping and closing method of locking circuit breaker for direct-current traction feeder protection device |
| CN109765423B (en) * | 2019-02-14 | 2024-04-02 | 南京工业职业技术学院 | Digital measuring method and measuring device for voltage of overhead line system with compensation |
| CN110380399A (en) * | 2019-08-02 | 2019-10-25 | 镇江大全赛雪龙牵引电气有限公司 | A kind of DC traction power-supply system for eliminating residual voltage |
| CN111579916A (en) * | 2019-09-23 | 2020-08-25 | 浙江得玛斯科技有限公司 | Direct current feeder cabinet line testing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01207670A (en) * | 1988-02-16 | 1989-08-21 | Mitsubishi Kasei Corp | Circuit testing device |
| CN201435600Y (en) * | 2009-03-31 | 2010-03-31 | 上海致达智利达系统控制有限责任公司 | Urban railway traffic DC traction power supply system microcomputer protection and measurement and control unit |
| CN101794986A (en) * | 2010-03-12 | 2010-08-04 | 镇江大全赛雪龙牵引电气有限公司 | Line test device and test method of direct-current traction power supply switch cabinet |
| CN101794980A (en) * | 2010-04-02 | 2010-08-04 | 镇江大全赛雪龙牵引电气有限公司 | Quick detection and protection device for electric potential of direct-current traction power supply return current rail |
| CN202696127U (en) * | 2011-12-14 | 2013-01-23 | 镇江大全赛雪龙牵引电气有限公司 | Direct current dragging power supply feeder line unit line testing system |
-
2011
- 2011-12-14 CN CN201110416678.4A patent/CN102496913B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01207670A (en) * | 1988-02-16 | 1989-08-21 | Mitsubishi Kasei Corp | Circuit testing device |
| CN201435600Y (en) * | 2009-03-31 | 2010-03-31 | 上海致达智利达系统控制有限责任公司 | Urban railway traffic DC traction power supply system microcomputer protection and measurement and control unit |
| CN101794986A (en) * | 2010-03-12 | 2010-08-04 | 镇江大全赛雪龙牵引电气有限公司 | Line test device and test method of direct-current traction power supply switch cabinet |
| CN101794980A (en) * | 2010-04-02 | 2010-08-04 | 镇江大全赛雪龙牵引电气有限公司 | Quick detection and protection device for electric potential of direct-current traction power supply return current rail |
| CN202696127U (en) * | 2011-12-14 | 2013-01-23 | 镇江大全赛雪龙牵引电气有限公司 | Direct current dragging power supply feeder line unit line testing system |
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