CN202978218U - Intelligent earth leakage protection device for urban rail transit - Google Patents
Intelligent earth leakage protection device for urban rail transit Download PDFInfo
- Publication number
- CN202978218U CN202978218U CN 201220733939 CN201220733939U CN202978218U CN 202978218 U CN202978218 U CN 202978218U CN 201220733939 CN201220733939 CN 201220733939 CN 201220733939 U CN201220733939 U CN 201220733939U CN 202978218 U CN202978218 U CN 202978218U
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- circuit
- relay
- main circuit
- earth leakage
- microcomputerized controller
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Abstract
The utility model discloses an intelligent earth leakage protection device for urban rail transit, which comprises a main circuit, a current sensor, a voltage sensor, a setting value setting circuit, a relay KA, a microcomputer controller, an alarming pre-warning circuit and a protection circuit, wherein the main circuit is connected with one end of the relay KA, and the other end of the relay KA is connected onto the main circuit via the setting value setting circuit; the output end of the relay KA is respectively connected with the microcomputer controller and the alarming pre-warning circuit; the microcomputer controller is respectively connected with the alarming pre-warning circuit and the protection circuit; one end of the current sensor is connected with the main circuit, and the other end of the current sensor is connected with the microcomputer controller; and one end of the voltage sensor is connected with the main circuit, and the other end of the voltage sensor is connected with the microcomputer controller. According to the intelligent earth leakage protection device for urban rail transit, relay protection and intelligent microcomputer detection are combined, and the intelligent earth leakage protection device provided by the utility model is high in accuracy and good in reliability.
Description
Technical field
The utility model relates to a kind of intelligent earth leakage trip, particularly the intelligent earth leakage trip of a kind of urban track traffic.
Background technology
Along with developing rapidly of urban rail transit in China, system's control and protection of track traffic is also more perfect.Particularly protection system is related to the safe operation of power supply and vehicle, more and more attracts great attention.Earth leakage trip is mainly as the earth leakage protection of electric power system and vehicle control system, and it and the quick protection of electric power system and the earth leakage protective in vehicle are complementary, and consist of short circuit, system's electric leakage, single motor-car electric leakage three-level protective link.
For the vehicle that operates in ground, due to accumulated snow, drench with rain and the impact of other reasons, can cause vehicle pantagraph current collector or line insulation SI semi-insulation resistance to reduce and form the leakage current that affects security of operation.
The utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of intelligent earth leakage trip that adapts to supply line.
For realizing above-mentioned purpose; the technical solution of the utility model is: the intelligent earth leakage trip of a kind of urban track traffic comprises main circuit, current sensor, voltage sensor, setting value initialization circuit, relay K A, microcomputerized controller, warning early warning circuit and protective circuit.Main circuit is connected with the end of relay K A; the other end of described auxiliary relay KA is connected to main circuit through the setting value initialization circuit; the output of affiliated auxiliary relay KA is connected with the warning early warning circuit with microcomputerized controller respectively; described microcomputerized controller is connected with warning early warning circuit, protective circuit respectively; one end of current sensor is connected with main circuit; the other end of described current sensor is connected with microcomputerized controller; one end and the main circuit of voltage sensor join, and the other end of described voltage sensor is connected with microcomputerized controller.
Effect of the present utility model is: the utility model has adopted relaying protection to detect with microcomputer-based intelligent the technology that matches, and has greatly improved accuracy and the reliability of protection, thereby has effectively determined the foundation that earth leakage trip drops into the protection workpiece.
Below in conjunction with accompanying drawing, the utility model is further described.
Description of drawings
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Referring to Fig. 1, Fig. 1 is structured flowchart of the present utility model, and the utility model comprises main circuit, current sensor, voltage sensor, setting value initialization circuit, relay K A, microcomputerized controller, warning early warning circuit and protective circuit.Main circuit is connected with the end of relay K A; the other end of described auxiliary relay KA is connected to main circuit through the setting value initialization circuit; the output of described relay K A is connected with the warning early warning circuit with microcomputerized controller respectively; described microcomputerized controller is connected with warning early warning circuit, protective circuit respectively; one end of current sensor is connected with main circuit; the other end of described current sensor is connected with microcomputerized controller; one end and the main circuit of voltage sensor join, and the other end of described voltage sensor is connected with microcomputerized controller.The magnitude of voltage of adjustment setting value initialization circuit just can change the on off operating mode of auxiliary relay KA, and then affect the running of Control System of Microcomputer, thereby realizes warning, early warning and the defencive function of circuit.
referring to Fig. 2, Fig. 2 is circuit theory diagrams of the present utility model, in main circuit 1, the negative electrode of backward diode VD1 respectively with the first resistance, capacitor C, relay K A is connected, the other end of described capacitor C is connected with the second resistance afterwards and the anode of backward diode VD1 joins, in setting value initialization circuit 2, relay is the Primary Component of earth leakage trip, the quality of its work has determined protection reliability, because the earth resistance resistance is interval different at each, corresponding earth-leakage protection voltage setting value is also different, if parameter is mated bad, to affect equipment protection lost efficacy.For the ease of the adjustment of protection value, added some damping resistances in the setting value initialization circuit, protect the voltage setting value to be set to five grades of 100V, 150V, 200V, 250V, 300V.In microcomputerized controller 3, the SA1 of microcomputerized controller 3, SV1 connection jaws respectively with main circuit in current sensor SA1 be connected with voltage sensor SV1, described microcomputerized controller is reported and submitted by port the signal and the state that detect to the upper level complex automatic system.In warning early warning circuit 4, when KA3 connected, warning circuit started; When KA4 started, early warning circuit started; KA1 is the time relay.
Under normal running (operation) conditions, the pressure drop that leakage current produces on the first resistance is much smaller than the setting value of relay, and the first resistance is equivalent to move the negative pole current potential to closely current potential.Only have the insulation of power supply gauze or vehicle electrically controlling system to sustain damage, and the pressure drop of leakage current on the first resistance that forms be when reaching the leakage pre-alarm value, microsystem is sent alarm signal, notes for operating personnel; When the first ohmically pressure drop reaches the setting value of relay; the concurrent warning of being out of order of earth protective device action; to show the parameters such as fault current, false voltage, time on display; and above-mentioned parameter is delivered to power station integrated automation system; operating personnel can according to fault time, fault section, fault current and vehicle operating figure, can judge disabled vehicle.
Claims (2)
1. intelligent earth leakage trip of urban track traffic, comprise main circuit, current sensor, voltage sensor, the setting value initialization circuit, relay (KA), microcomputerized controller, warning early warning circuit and protective circuit, it is characterized in that, main circuit is connected with an end of relay (KA), the other end of described relay (KA) is connected to main circuit through the setting value initialization circuit, the output of described relay (KA) is connected with the warning early warning circuit with microcomputerized controller respectively, described microcomputerized controller respectively with the warning early warning circuit, protective circuit is connected, one end of current sensor is connected with main circuit, the other end of described current sensor is connected with microcomputerized controller, one end and the main circuit of voltage sensor join, the other end of described voltage sensor is connected with microcomputerized controller.
2. the intelligent earth leakage trip of urban track traffic according to claim 1; it is characterized in that; wherein said main circuit comprises the first resistance, backward diode (VD1), electric capacity (C), the second resistance; the negative electrode of backward diode VD1 is connected with the first resistance, capacitor C respectively, and the other end of described capacitor C is connected with the second resistance afterwards and the anode of backward diode VD1 joins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220733939 CN202978218U (en) | 2012-12-27 | 2012-12-27 | Intelligent earth leakage protection device for urban rail transit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220733939 CN202978218U (en) | 2012-12-27 | 2012-12-27 | Intelligent earth leakage protection device for urban rail transit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202978218U true CN202978218U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220733939 Expired - Lifetime CN202978218U (en) | 2012-12-27 | 2012-12-27 | Intelligent earth leakage protection device for urban rail transit |
Country Status (1)
| Country | Link |
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| CN (1) | CN202978218U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867387A (en) * | 2015-06-23 | 2015-08-26 | 上海工程技术大学 | Experiment teaching device used for simulating relaying principles of rail transit power supply system |
| CN106992496A (en) * | 2017-05-26 | 2017-07-28 | 湘潭市恒创电气设备有限公司 | Earth leakage protecting method for Feeding System of Urban Rail Transit |
| CN107645152A (en) * | 2017-10-30 | 2018-01-30 | 镇江大全赛雪龙牵引电气有限公司 | Triple negative ground voltage protections |
| CN109245035A (en) * | 2017-07-10 | 2019-01-18 | 比亚迪股份有限公司 | Power supply system of train and its earth leakage protective device, method |
| CN109245028A (en) * | 2017-07-10 | 2019-01-18 | 比亚迪股份有限公司 | Train and power supply system of train and its earth leakage protective device |
| CN109245027A (en) * | 2017-07-10 | 2019-01-18 | 比亚迪股份有限公司 | Train, power supply system of train and its detection of electrical leakage recovery device, method |
-
2012
- 2012-12-27 CN CN 201220733939 patent/CN202978218U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867387A (en) * | 2015-06-23 | 2015-08-26 | 上海工程技术大学 | Experiment teaching device used for simulating relaying principles of rail transit power supply system |
| CN104867387B (en) * | 2015-06-23 | 2017-08-25 | 上海工程技术大学 | A kind of experimental teaching unit for being used to simulate the Principles of Relay Protection that rail hands over electric power system |
| CN106992496A (en) * | 2017-05-26 | 2017-07-28 | 湘潭市恒创电气设备有限公司 | Earth leakage protecting method for Feeding System of Urban Rail Transit |
| CN106992496B (en) * | 2017-05-26 | 2018-07-31 | 湘潭市恒创电气设备有限公司 | Earth leakage protecting method for Feeding System of Urban Rail Transit |
| CN109245035A (en) * | 2017-07-10 | 2019-01-18 | 比亚迪股份有限公司 | Power supply system of train and its earth leakage protective device, method |
| CN109245028A (en) * | 2017-07-10 | 2019-01-18 | 比亚迪股份有限公司 | Train and power supply system of train and its earth leakage protective device |
| CN109245027A (en) * | 2017-07-10 | 2019-01-18 | 比亚迪股份有限公司 | Train, power supply system of train and its detection of electrical leakage recovery device, method |
| CN109245027B (en) * | 2017-07-10 | 2020-02-21 | 比亚迪股份有限公司 | Train, train power supply system and electric leakage detection and recovery device and method thereof |
| CN109245028B (en) * | 2017-07-10 | 2020-03-31 | 比亚迪股份有限公司 | Train and train power supply system and earth leakage protection device thereof |
| CN109245035B (en) * | 2017-07-10 | 2020-03-31 | 比亚迪股份有限公司 | Train power supply system and leakage protection device and method thereof |
| CN107645152A (en) * | 2017-10-30 | 2018-01-30 | 镇江大全赛雪龙牵引电气有限公司 | Triple negative ground voltage protections |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |