CN202471896U - DC600V trunk on-line insulation monitoring device - Google Patents
DC600V trunk on-line insulation monitoring device Download PDFInfo
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- CN202471896U CN202471896U CN2012200513441U CN201220051344U CN202471896U CN 202471896 U CN202471896 U CN 202471896U CN 2012200513441 U CN2012200513441 U CN 2012200513441U CN 201220051344 U CN201220051344 U CN 201220051344U CN 202471896 U CN202471896 U CN 202471896U
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Abstract
The utility model relates to a DC600V trunk on-line insulation monitoring device. A monitoring system comprises a voltage sensor monitoring the voltage of at least one power supply trunk and an another voltage sensor monitoring the voltage to ground of a positive line of at least one power supply trunk. Voltage signals monitored by the voltage sensors are transmitted to a PLC control system which processes the monitored voltage signals and presents a result on a displayer. The monitoring device can carry out an on-line test over the power supply voltage and the insulation condition of a DC600V line. When a train operates in garage, a ground power supply is used to test the value of an insulation resistance of the trunk so as to guarantee a garage-out state of the train, thereby offering support to ensure traffic safety. That whether or not the train has an insulation problem is judged after a locomotive is additionally attached to the train, and simultaneously the power supply quality of the locomotive can be tested. All data can be viewed and replayed in real time and also can be dumped by a CF card, read and printed by a ground-based computer. The data can be stored for a long time (first-in first-out, 30 days) while frequent downloading is not required.
Description
Technical field
The utility model relates to a kind of earth detector of passenger train, and particularly a kind of being applicable to adopted the technological electric locomotive of neutral earthing or the DC600V main line on-line insulation monitoring device of ground power supply electric power system or vehicle.
Background technology
The DC600V power supply compare with the AC380V that generator car provide have energy-saving and environmental protection, efficient, increase advantage such as capacity; From 2004, newly make 25T, 25G sections road passenger vehicle power supply and all adopt DC600V direct supply basically by electric locomotive or the output of diesel locomotive DC600V supply unit.
Locomotive and passenger vehicle all have DC600V detection of electrical leakage function in the 25 type passenger trains of electric locomotive traction, but the two detection principle and circuit structure are different:
According to the cascade protection principle, passenger vehicle adopts leakage current sensor to use this car of current method test electrical leakage, concrete electric leakage vehicle in decidable train when electric leakage takes place, but test result (unit milliampere) is influenced by high-frequency harmonic, and can be higher than actual value;
Electric locomotive adopts neutral earthing method test electrical leakage, is a kind of voltage method (positive and negative line-to-earth voltage) test mode, test be to be listed as DC600V bus electrical leakage entirely, test result is voltage (a unit volt), just can draw leakage current value after needing to convert.
Therefore, locomotive indication DC600V took place in the utilization had earth fault, and the normal situation of passenger vehicle detection of electrical leakage and influence train and start.
The utility model content
The purpose of the utility model is the defective to prior art; Provide a kind of and can monitor in real time, demonstration, recording storage two-way DC600V bus just/negative busbar between and voltage waveform and the magnitude of voltage between over the ground respectively; Can monitor in real time, demonstration, recording storage two-way DC600V bus just/negative over the ground insulating resistance value respectively; When certain the road DC600V supply main insulation against ground resistance value that is detected is lower than the alarm threshold value of setting, send the DC600V main line on-line insulation monitoring device of warning.
The technical scheme of the utility model is: a kind of DC600V main line on-line insulation monitoring device; Described supervisory system comprises the voltage sensor of monitoring at least one road supply main voltage, the voltage sensor of the positive line-to-earth voltage of at least one road supply main of monitoring; Described voltage sensor transfers to the PLC control system with the voltage signal that monitors; The PLC control system is handled the information that monitors, and the result is shown to display.
Preferably: described supervisory system comprises the voltage sensor JK1 of monitoring I road supply main voltage, the voltage sensor JK2 of monitoring II road supply main voltage, the voltage sensor JK22 of the positive line-to-earth voltage of monitoring I road supply main and the voltage sensor JK23 of the positive line-to-earth voltage of monitoring II road supply main; Described voltage sensor JK1, JK2, JK22, JK23 transfer to the PLC control system with the voltage signal that monitors; The PLC control system is handled the information that monitors, and the result is shown to display.
Preferably: described display screen is a touch-screen.
The beneficial effect of the utility model is: but the utility model on-line testing DC600V line powering voltage and insulation situation; In the train storehouse during operation; Be that ground power supply capable of using detects main line insulation resistance numerical value, to guarantee train outbound state, for guarantee driving safety provides support.Can judge in view of the above whether train exists Insulation Problems, also can detect the locomotive power supply quality simultaneously after carrying additionally locomotive.All data have watches and playback function in real time, also can be by the dump of CF card, through ground-based computer read, print processing.Data can realize standing storage (first in first out, 30 days), do not need frequent download.
The megger test relative error is less than 5%.Insulation against ground resistance alarm threshold value setting range is 500 Ω-1.5k Ω; The preset insulation resistance alarm threshold value of dispatching from the factory is 800 Ω; Can realize when insulation against ground resistance during greater than 2k Ω; The alarm and protection function guarantees to be failure to actuate, when insulation against ground resistance during smaller or equal to the alarm threshold value, and alarm and protection function safety action.
On June 3rd, 2011 is the existing car test of section Qingdao-Shanghai YZ 25G 350601 cars in Qingdao.Adopt ground DC600V power supply power supply, by the earthing mode ground connection identical with locomotive DC 600V power supply device.Open inverter, after air-conditioning is waited for bus and gone up load, between DC600V main track or negative wire and ground, insert resistance simulation main line insulation against ground resistance, record following data:
| Sequence number | Insert resistance value (Ω) over the ground | Screen displaying measured value (Ω) | Relative error (%) |
| 1 | 791 | 756 | 4.4 |
| 2 | 881 | 861 | 2.3 |
| 3 | 2018 | 2037 | 0.94 |
Description of drawings
Fig. 1 is the schematic diagram of the utility model
Embodiment
Embodiment below in conjunction with description of drawings the utility model:
A kind of DC600V main line on-line insulation monitoring device; Described supervisory system comprises the voltage sensor of monitoring at least one road supply main voltage, the voltage sensor of the positive line-to-earth voltage of at least one road supply main of monitoring; Described voltage sensor transfers to the PLC control system with the voltage signal that monitors; The PLC control system is handled the information that monitors, and the result is shown to display.
Described supervisory system comprises the voltage sensor JK1 of monitoring I road supply main voltage, the voltage sensor JK2 of monitoring II road supply main voltage, the voltage sensor JK22 of the positive line-to-earth voltage of monitoring I road supply main and the voltage sensor JK23 of the positive line-to-earth voltage of monitoring II road supply main; Described voltage sensor JK1, JK2, JK22, JK23 transfer to the PLC control system with the voltage signal that monitors; The PLC control system is handled the information that monitors, and the result is shown to display.Described display screen is a touch-screen.
DC600V main line on-line insulation monitoring device is installed in the integrated control cabinet, close circuit breaker, and PLC, touch-screen, sensor are established beginning work by cable.This moment the I road, electricity is not all sent on the II road, JK1, JK2, JK22, JK23 become and send voltage to be zero.Main line negative wire voltage-to-ground is that PLC calculates: deduct positive line-to-earth voltage by rail voltage and draw.
Before the train outbound, supply power by ground power supply.
Work as need of work, after DC600V sent electricity for I and II road, closed Q1 or Q2 main circuit breaker, JK1, JK2, JK22, JK23 all had voltage output, and deliver to PLC and screen displaying.Promptly begin insulating monitoring this moment.JK1 just often, JK2 is about 600V, JK22, JK23 are about 300V.
For example: when train main line insulation in a certain road descended, corresponding rail voltage will change.Suppose that the insulation against ground of I road supply main main track drops to and has only 800 Ohmages, this moment, the I road rail voltage of JK1 showed that the demonstration of JK22 main line voltage-to-ground can become about 129V about 600V.129V records by voltage sensor is actual, but simultaneously the formula preserved of PLC according to inside to calculate insulation resistance be 800 Europe, and show and be recorded on the touch-screen.Because of calculating is real-time, so show insulating resistance value, parameters such as voltage are time dependent curves.
Just often, for saving datarams, touch-screen is according to setting-up time interval record data, general interval 2 minutes.(like the power supply overvoltage, insulation resistance descends) transfers 1 second record at interval automatically to when fault, can write down 30 days.
Other three road main lines insulation against ground electrical resistance monitorings in like manner.
After the normal outbound of train, change by locomotive (headstock) power supply, the inspection of power supply back is reported to the police as finding insulation, can judge the locomotive power supply insulation fault.Setting out on a journey also can be to main line insulation monitoring in real time after the operation.
Claims (3)
1. DC600V main line on-line insulation monitoring device; It is characterized in that: described supervisory system comprises the voltage sensor of monitoring at least one road supply main voltage, the voltage sensor of the positive line-to-earth voltage of at least one road supply main of monitoring; Described voltage sensor transfers to the PLC control system with the voltage signal that monitors; The PLC control system is handled the information that monitors, and the result is shown to display.
2. DC600V main line on-line insulation monitoring device as claimed in claim 1; It is characterized in that: described supervisory system comprises the voltage sensor JK1 of monitoring I road supply main voltage, the voltage sensor JK2 of monitoring II road supply main voltage, the voltage sensor JK22 of the positive line-to-earth voltage of monitoring I road supply main and the voltage sensor JK23 of the positive line-to-earth voltage of monitoring II road supply main; Described voltage sensor JK1, JK2, JK22, JK23 transfer to the PLC control system with the voltage signal that monitors; The PLC control system is handled the information that monitors, and the result is shown to display.
3. DC600V main line on-line insulation monitoring device as claimed in claim 1, it is characterized in that: described display screen is a touch-screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200513441U CN202471896U (en) | 2012-02-17 | 2012-02-17 | DC600V trunk on-line insulation monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200513441U CN202471896U (en) | 2012-02-17 | 2012-02-17 | DC600V trunk on-line insulation monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202471896U true CN202471896U (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200513441U Expired - Fee Related CN202471896U (en) | 2012-02-17 | 2012-02-17 | DC600V trunk on-line insulation monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202471896U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565648A (en) * | 2012-02-17 | 2012-07-11 | 青岛四方车辆研究所有限公司 | DC600V main line on-line insulation monitoring device |
| CN109212373A (en) * | 2017-06-29 | 2019-01-15 | 株洲中车时代电气股份有限公司 | The grounding fault diagnosis and insulation detecting method and device of power supply system of train |
-
2012
- 2012-02-17 CN CN2012200513441U patent/CN202471896U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565648A (en) * | 2012-02-17 | 2012-07-11 | 青岛四方车辆研究所有限公司 | DC600V main line on-line insulation monitoring device |
| CN109212373A (en) * | 2017-06-29 | 2019-01-15 | 株洲中车时代电气股份有限公司 | The grounding fault diagnosis and insulation detecting method and device of power supply system of train |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266000 No. 231, Ruichang Road, Sifang District, Shandong, Qingdao Patentee after: CRRC QINGDAO SIFANG VEHICLE RESEARCH INSTITUTE CO., LTD. Address before: 266000 No. 231, Ruichang Road, Sifang District, Shandong, Qingdao Patentee before: Qingdao Sifang Rolling Stock Research Institute Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20210217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |