CN106253207A - A kind of ground-fault protection system of orbit traffic direct current trailer system - Google Patents
A kind of ground-fault protection system of orbit traffic direct current trailer system Download PDFInfo
- Publication number
- CN106253207A CN106253207A CN201610724883.XA CN201610724883A CN106253207A CN 106253207 A CN106253207 A CN 106253207A CN 201610724883 A CN201610724883 A CN 201610724883A CN 106253207 A CN106253207 A CN 106253207A
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- voltage
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- protection device
- ground
- diode
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/14—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to occurrence of voltage on parts normally at earth potential
Abstract
The invention discloses the ground-fault protection system of a kind of orbit traffic direct current trailer system, including earth resistance, partial pressure potential device, voltage measurement amplifier, current sensor, voltage sensor, the first diode, the first resistance, the first electric capacity, voltage relay and PLC protection device.DC traction system negative pole is accessed in earth resistance one end, its other end connects the first diode cathode, first diode anode is connected with ground wire through current sensor, first electric capacity one end connects the first diode cathode, its other end is connected through the first resistance and the first diode anode, two fixing ends of partial pressure potential device are respectively connected to negative pole and ground wire, voltage measurement amplifier output voltage signal is to PLC protection device and voltage relay, current sensor and voltage sensor output signal to PLC protection device respectively, voltage relay and PLC protection device carry out protection act according to the signal received.The present invention provides multiple protection measure, and reliability is high.
Description
Technical field
The invention belongs to orbit traffic direct current trailer system field, particularly to a kind of orbit traffic direct current trailer system
Ground-fault protection system.
Background technology
Ground protection present situation according to urban rail transit in China trailer system, China's major part urban track traffic is all adopted
With positive contact net power, negative pole rail reflux type, and had fairly perfect protection system to earth (DC cabinet
Frame leakage protection device+side rail wear).
But also have some cities use special negative pole as current return circuit (vehicle is orbited by rubber tyre,
Rail is not as current return circuit) cross-saddle single-track traffic DC traction system, owing to the vehicle insulated with ground is in operation
With voltage, if vehicle generation insulation fault, the voltage between vehicle and ground is danger close to people, exists in order to ensure passenger
Vehicle arrives at a station the safety of passenger when getting off, it is necessary to arrange earth protective device at traction substation negative pole.
Prior art detects between negative ground voltage only by the voltage on detection earth resistance and by divider resistance with
Voltage relay regulates protection act magnitude of voltage, there is detection error relatively big, and Operation and Maintenance is inconvenient, and protects for substance measure
Protect, be susceptible to fault.
Summary of the invention
In order to solve the technical problem that above-mentioned background technology proposes, it is desirable to provide a kind of orbit traffic direct current traction
The ground-fault protection system of system, it is provided that multiple protection measure, reliability is higher.
In order to realize above-mentioned technical purpose, the technical scheme is that
The ground-fault protection system of a kind of orbit traffic direct current trailer system, surveys including earth resistance, partial pressure potential device, voltage
Amount amplifier, current sensor, voltage sensor, the first diode, the first resistance, the first electric capacity, voltage relay and PLC protect
Protection unit, the negative pole of one end access DC traction system of described earth resistance, the other end of earth resistance connects the one or two pole
The negative electrode of pipe, the anode of the first diode is connected with ground wire through current sensor, and one end of described first electric capacity connects the one or two
The negative electrode of pole pipe, the other end of the first electric capacity is connected through the anode of the first resistance and the first diode, described partial pressure potential device
Two fixing ends are respectively connected to negative pole and the ground wire of DC traction system, and two inputs of described voltage sensor connect respectively
The sliding end of partial pressure potential device and ground wire, two inputs of described voltage measurement amplifier are respectively connected to the two of earth resistance
End, described voltage measurement amplifier output earth resistance both end voltage signal passes to voltage relay and PLC protection device, electric current
Sensor and voltage sensor export main circuit current signal and voltage division signal respectively to PLC protection device, voltage relay and PLC
Protection device carries out protection act according to the signal received.
Preferred version based on technique scheme, ground-fault protection system also includes human-computer interaction module, described people
Machine interactive module is connected with PLC protection device, when human-computer interaction module is for arranging operation condition and the action of PLC protection device
Between, and show electric current, the voltage signal that PLC protection device receives.
Preferred version based on technique scheme, described human-computer interaction module uses touch screen.
Preferred version based on technique scheme, is more than the movement time setting PLC protection device and voltage relay
The movement time of DC cabinet frame leakage protection device.
Preferred version based on technique scheme, described PLC protection device uses s7-300 system constructing to form.
The beneficial effect that employing technique scheme is brought:
(1) present invention change employing divider resistance making alive relay detect and judge the traditional method of earth resistance, pass through
The voltage measurement amplifier of the highest pressure grade carries out accurately measuring earth resistance magnitude of voltage, and is inputted by measured value simultaneously
To PLC protection device and voltage relay, and the real-time current detecting major loop inputs to PLC protection device, by input
The operation voltage tripartite arranged to the real-time voltage of PLC protection device, electric current and voltage relay is arranged simultaneously as device merit
Can basis for estimation, can serve as basis for estimation carry out the output of actuating signal, triple protection as long as there being a condition to meet
Arranging, a weight fault does not also interfere with the realization of defencive function；
(2) present invention can protect all positive pole loops of below commutator short trouble over the ground, including direct-current switch cabinet just
The extremely short trouble to cabinet, and the current element of frame leakage protection device can only protect direct-current switch cabinet positive pole to cabinet
Short trouble；
(3) present invention uses touching display screen, and except the intrinsic setting of voltage relay, other defencive function parameters are arranged all can touched
Directly arrange on control display screen, it is achieved that human-computer interaction more easily；
(4) movement time more than DC cabinet frame leakage protection device movement time of the present invention is set, so can effective district
Divide positive pole to touch shell fault and contact line conducting wire earth fault, reach to improve the purpose of ground protection.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Label declaration: 1, partial pressure potential device；2, voltage sensor；3, voltage measurement amplifier；4, current sensor；R: connect
Earth resistance；VD: the first diode；R1: the first resistance；C: the first electric capacity.
Detailed description of the invention
Below with reference to accompanying drawing, technical scheme is described in detail.
As it is shown in figure 1, the ground-fault protection system of a kind of orbit traffic direct current trailer system, including earth resistance R, divide
Piezoelectric position device 1, voltage measurement amplifier 3, current sensor 4, voltage sensor the 2, first diode VD, the first resistance R1,
One electric capacity C, voltage relay and PLC protection device, one end of described earth resistance R is accessed the negative pole of DC traction system, is connect
The other end of earth resistance R connects the negative electrode of the first diode VD, and the anode of the first diode VD is through current sensor and ground wire phase
Even, one end of described first electric capacity C connects the negative electrode of the first diode VD, the other end of the first electric capacity C through the first resistance R1 with
The anode of the first diode VD is connected, and the fixing end of two of described partial pressure potential device 1 is respectively connected to the negative pole of DC traction system
And ground wire, two inputs of described voltage sensor 2 connect sliding end and the ground wire of partial pressure potential device 1, described voltage respectively
Two inputs of measuring amplifier 3 are respectively connected to the two ends of earth resistance, and described voltage measurement amplifier 3 exports earth resistance
R both end voltage signal exports major loop respectively to voltage relay and PLC protection device, current sensor 4 and voltage sensor 2
Current signal and voltage division signal are to PLC protection device.
The voltage measurement amplifier using the high pressure grade of high accuracy carries out accurately measuring earth resistance magnitude of voltage, and simultaneously
Measured value is inputed to PLC protection device and voltage relay, and the real-time current detecting major loop inputs to PLC protection dress
Put, by inputing to the operation voltage of the real-time voltage of PLC protection device, electric current and voltage relay setting simultaneously as judgement
Foundation, can serve as basis for estimation carry out the output of actuating signal as long as there being a condition to meet.
In the present embodiment, ground-fault protection system also includes human-computer interaction module, described human-computer interaction module and PLC
Protection device is connected, and human-computer interaction module is for arranging operation condition and the movement time of PLC protection device, and shows that PLC protects
Electric current that protection unit receives, voltage signal.Human-computer interaction module can use touching display screen.PLC protection device uses s7-
300 system constructings form.
The movement time setting PLC protection device and voltage relay in the present embodiment protects more than the leakage of DC cabinet framework
The movement time of protection unit.Existing protective measure is generally provided with DC cabinet frame leakage protection device, frame leakage protection
The current element protection direct-current switch cabinet positive pole short trouble to cabinet of device, therefore sets PLC protection device and voltage continues
The movement time of electrical equipment, more than the movement time of DC cabinet frame leakage protection device, can effectively be distinguished positive pole and touches shell fault and connect
Net-fault wired earth fault, conveniently allows staff according to quick failure judgement reason movement time.
Above example is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, every
The technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within scope
Within.
Claims (5)
1. the ground-fault protection system of an orbit traffic direct current trailer system, it is characterised in that: include earth resistance, dividing potential drop
Potentiometer, voltage measurement amplifier, current sensor, voltage sensor, the first diode, the first resistance, the first electric capacity, voltage
Relay and PLC protection device, the negative pole of DC traction system, the other end of earth resistance are accessed in one end of described earth resistance
Connecting the negative electrode of the first diode, the anode of the first diode is connected with ground wire through current sensor, the one of described first electric capacity
End connects the negative electrode of the first diode, and the other end of the first electric capacity is connected through the anode of the first resistance and the first diode, described
The fixing end of two of partial pressure potential device is respectively connected to negative pole and the ground wire of DC traction system, and two of described voltage sensor defeated
Entering end and connect sliding end and the ground wire of partial pressure potential device respectively, two inputs of described voltage measurement amplifier are respectively connected to connect
The two ends of earth resistance, described voltage measurement amplifier output earth resistance both end voltage signal is protected to voltage relay and PLC
Device, current sensor and voltage sensor export main circuit current signal and voltage division signal respectively to PLC protection device, voltage
Relay and PLC protection device carry out protection act according to the signal received.
A kind of ground-fault protection system of orbit traffic direct current trailer system, it is characterised in that:
Ground-fault protection system also includes that human-computer interaction module, described human-computer interaction module are connected with PLC protection device, man-machine interaction
Module is for arranging operation condition and the movement time of PLC protection device, and shows electric current, the electricity that PLC protection device receives
Pressure signal.
A kind of ground-fault protection system of orbit traffic direct current trailer system, it is characterised in that:
Described human-computer interaction module uses touch screen.
A kind of ground-fault protection system of orbit traffic direct current trailer system, it is characterised in that:
Set the movement time more than the DC cabinet frame leakage protection device movement time of PLC protection device and voltage relay.
A kind of ground-fault protection system of orbit traffic direct current trailer system, it is characterised in that:
Described PLC protection device uses s7-300 system constructing to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610724883.XA CN106253207A (en) | 2016-08-25 | 2016-08-25 | A kind of ground-fault protection system of orbit traffic direct current trailer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610724883.XA CN106253207A (en) | 2016-08-25 | 2016-08-25 | A kind of ground-fault protection system of orbit traffic direct current trailer system |
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| CN106253207A true CN106253207A (en) | 2016-12-21 |
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| CN201610724883.XA Pending CN106253207A (en) | 2016-08-25 | 2016-08-25 | A kind of ground-fault protection system of orbit traffic direct current trailer system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| CN110783886A (en) * | 2019-11-07 | 2020-02-11 | 湖南恒创开拓电气有限公司 | Leakage protection method of rail transit power supply system |
| CN113625021A (en) * | 2020-05-06 | 2021-11-09 | 比亚迪股份有限公司 | Protection device, method and equipment for electric leakage detection resistor |
| CN114167307A (en) * | 2021-12-09 | 2022-03-11 | 重庆中车长客轨道车辆有限公司 | Ground fault detection system and method for straddle type monorail vehicle |
| CN114167307B (en) * | 2021-12-09 | 2024-04-30 | 重庆中车长客轨道车辆有限公司 | Ground fault detection system and method for straddle type monorail vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204101950U (en) * | 2014-08-04 | 2015-01-14 | 镇江大全赛雪龙牵引电气有限公司 | Based on the control system of PLC orbit traffic direct current traction rectifier |
| CN204719166U (en) * | 2015-06-01 | 2015-10-21 | 镇江大全赛雪龙牵引电气有限公司 | DC traction power-supply system framework leakage monitoring device |
| CN205283088U (en) * | 2015-12-31 | 2016-06-01 | 中铁第四勘察设计院集团有限公司 | A direct current ground protecting device for magnetic levitation track traffic |
| CN205986095U (en) * | 2016-08-25 | 2017-02-22 | 镇江大全赛雪龙牵引电气有限公司 | Earth fault protection system of track traffic DC traction system |
-
2016
- 2016-08-25 CN CN201610724883.XA patent/CN106253207A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204101950U (en) * | 2014-08-04 | 2015-01-14 | 镇江大全赛雪龙牵引电气有限公司 | Based on the control system of PLC orbit traffic direct current traction rectifier |
| CN204719166U (en) * | 2015-06-01 | 2015-10-21 | 镇江大全赛雪龙牵引电气有限公司 | DC traction power-supply system framework leakage monitoring device |
| CN205283088U (en) * | 2015-12-31 | 2016-06-01 | 中铁第四勘察设计院集团有限公司 | A direct current ground protecting device for magnetic levitation track traffic |
| CN205986095U (en) * | 2016-08-25 | 2017-02-22 | 镇江大全赛雪龙牵引电气有限公司 | Earth fault protection system of track traffic DC traction system |
Non-Patent Citations (3)
| Title |
|---|
| 于松伟: "《城市轨道交通供电系统设计原理与应用》", 30 June 2008 * |
| 王荣伟: "接触网不同安装方式下接地保护的动作分析", 《电气化铁道》 * |
| 顾培琳: "DIS实验在高中物理教学中的优化应用及有效性研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| CN110783886A (en) * | 2019-11-07 | 2020-02-11 | 湖南恒创开拓电气有限公司 | Leakage protection method of rail transit power supply system |
| CN110783886B (en) * | 2019-11-07 | 2021-03-02 | 湖南恒创开拓电气有限公司 | Leakage protection method of rail transit power supply system |
| CN113625021A (en) * | 2020-05-06 | 2021-11-09 | 比亚迪股份有限公司 | Protection device, method and equipment for electric leakage detection resistor |
| CN114167307A (en) * | 2021-12-09 | 2022-03-11 | 重庆中车长客轨道车辆有限公司 | Ground fault detection system and method for straddle type monorail vehicle |
| CN114167307B (en) * | 2021-12-09 | 2024-04-30 | 重庆中车长客轨道车辆有限公司 | Ground fault detection system and method for straddle type monorail vehicle |
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Application publication date: 20161221 |