CN103323716A - DC 48V insulation monitoring device - Google Patents
DC 48V insulation monitoring device Download PDFInfo
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- CN103323716A CN103323716A CN2013102591247A CN201310259124A CN103323716A CN 103323716 A CN103323716 A CN 103323716A CN 2013102591247 A CN2013102591247 A CN 2013102591247A CN 201310259124 A CN201310259124 A CN 201310259124A CN 103323716 A CN103323716 A CN 103323716A
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Abstract
The invention discloses a power line insulation device, and particularly relates to a DC 48V insulation on-line monitoring device of a train system. The DC 48V insulation monitoring system comprises a PLC system, a voltage sensor, an alarming circuit, a sampling circuit, a power module and a touch screen, the input end of the voltage sensor is connected with a direct current bus, the output end of the voltage sensor is connected with the PLC system, the PLC system processes received voltage signals, and the received voltage signals are displayed through the touch screen. The alarming circuit and the sampling circuit are respectively connected with the PLC system. The DC 48V insulation monitoring device has the advantages that due to the fact that a neutral-point circuit is adopted, the defect of unbalance of ground insulation of the direct circuit of a bridge circuit is avoided, and the fact that the monitoring device can correctly reflect the insulation situation of the train system is ensured. The touch screen carries out monitoring on an occurred train fault event, the running state of a train during electric leakage can be analyzed conveniently, and personal safety is ensured.
Description
Technical field
The present invention relates to a kind of line of electric force seal, specifically, relate to a kind of power supply system of train DC48V insulation line monitoring device.
Background technology
During power supply system of train insulation decline fault, cause that power supply lines short circuit sparking normally causes the first cause of train accident, it is very important therefore the feed circuit system being carried out insulating monitoring.
Existing power system insulation monitoring technology is generally taked two kinds of off-line monitoring and on-line monitorings, and off-line monitoring requires equipment state out of service, and the normally operation of periodic breaks, so off-line monitoring experiment is difficult for accuracy of judgement and real-time judge; On-line monitoring is that tested device is under the condition of charging operation, the insulation status of equipment carried out continuously or monitoring regularly, and timely reactive system fault, thereby mostly adopt the on-line monitoring mode.In the on-line monitoring mode, more employing direct current bridge method when a certain bus insulation of straight-flow system descends, has been destroyed the balance of electric bridge, reflects the insulation situation of straight-flow system by the uneven degree that detects electric bridge.
Summary of the invention
The objective of the invention is for the deficiencies in the prior art, a kind of power supply system of train DC48V on-line insulation monitoring device is provided, Real-Time Monitoring train operation median generatrix voltage signal guarantees train operational safety and reliability.
Technical scheme of the present invention is: a kind of DC48V insulation monitoring and warning device, it is characterized in that: described monitoring device comprises the PLC(Programmable Logic Controller) system, voltage sensor, warning circuit, sample circuit, power module and touch-screen, described voltage sensor input end links to each other with dc bus, output terminal links to each other with the PLC system, the PLC system processes the voltage signal that receives, and shows by touch-screen; Described warning circuit links to each other with the PLC system respectively with sample circuit.
Preferably, described sample circuit comprises the first sampling resistor R1, the second sampling resistor R2 and stake resistance R4, and take circuit of neutral point to connect, the resistance of the first sampling resistor R1 and the second sampling resistor R2 equates, enters observation circuit by the automatic control linkage of PLC system.
Preferably, described monitoring device also comprises self check resistance R 3, and self check resistance R 3 links to each other with the PLC system, during the monitoring device self check, and PLC system control self check resistance R 3 access observation circuits.
Preferably, described voltage sensor comprises the voltage sensor JK1 of monitoring main track busbar voltage and the voltage sensor JK2 of monitoring negative wire busbar voltage, and voltage sensor JK1 and voltage sensor JK1 all export the voltage signal that monitors to the analog voltage input of PLC system.
Preferably, described power module is the DC48V/DC24V power transfer module, and the power module input end accesses dc bus by fuse, and output terminal is respectively voltage sensor, touch-screen and PLC system electric energy is provided.
Preferably, described touch-screen has setting parameter, current record, logout and fault logging function, shows in real time magnitude of voltage and voltage waveform that monitoring system monitors, and magnitude of voltage can be stored in the storage card of touch-screen immediately, is convenient to download analyze; Also be provided with monitoring device self check button and mute button on the touch-screen.
The present invention's beneficial effect compared with prior art is:
(1) control core adopts Programmable Logic Controller PLC system, and antijamming capability is strong, and travelling speed is fast, the voltage signal that monitors can be processed fast, and is presented on the touch-screen;
(2) sample circuit comprises the first sampling resistor R1, the second sampling resistor R2 and stake resistance R4, and takes circuit of neutral point to connect.Can realize carrying out the monitoring device process of self-test before the train operation by self check button on access self check resistance R 3 and the control touch-screen, guarantee the reliability of monitoring device; By the prerequisite that the access circuit of neutral point is judged as the PLC system, avoided because the erroneous judgement that the imbalance of dc bus insulation against ground causes guarantees that monitoring device correctly reflects the insulation situation of power supply system of train;
(3) monitoring device is provided with warning circuit, when the input voltage of Programmable Logic Controller PLC system monitoring surpasses predetermined magnitude of voltage, device sends warning immediately, the failure messages such as magnitude of voltage and electric leakage time when touch-screen records electric leakage simultaneously, be convenient to the train fault event that occurs is carried out data analysis and monitoring, guarantee personal safety.
Description of drawings
Fig. 1 is the structural representation of monitoring system of the present invention;
Fig. 2 is monitoring system circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention:
Referring to Fig. 1, Fig. 2, a kind of DC48V insulation monitoring and warning device, described monitoring device comprises the PLC(Programmable Logic Controller) system, voltage sensor, warning circuit, sample circuit, power module and touch-screen, described voltage sensor input end links to each other with dc bus, output terminal links to each other with the PLC system, the PLC system processes the voltage signal that receives, and shows by touch-screen; Described warning circuit links to each other with the PLC system respectively with sample circuit.
The sample circuit of supervising device comprises the first sampling resistor R1, the second sampling resistor R2 and stake resistance R4, and take circuit of neutral point to connect, the resistance of the first sampling resistor R1 and the second sampling resistor R2 equates, enters observation circuit by the automatic control linkage of PLC system.
Supervising device also comprises self check resistance R 3, and self check resistance R 3 links to each other with the PLC system, during the monitoring device self check, and PLC system control self check resistance R 3 access observation circuits; After the monitoring device self check was finished, PLC system control self check resistance R 3 disconnected with observation circuit.
The voltage sensor input end links to each other with dc bus, voltage sensor comprises the voltage sensor JK1 of monitoring main track busbar voltage and the voltage sensor JK2 of monitoring negative wire busbar voltage, and voltage sensor JK1 and voltage sensor JK1 all export the voltage signal that monitors to the analog voltage input of PLC system.
The power supply of each module of supervisory system adopts straight conversion module, adopt the DC48V/DC24V power transfer module, the power module input end accesses dc bus by fuse, and output terminal is respectively voltage sensor, touch-screen and Programmable Logic Controller PLC system electric energy is provided.
Programmable Logic Controller PLC output voltage information exchange is crossed touch-screen and is shown, touch-screen has setting parameter, current record, logout and fault logging function, show in real time magnitude of voltage and the voltage waveform that monitoring system monitors, magnitude of voltage can be stored in the storage card of touch-screen immediately, is convenient to download analyze; Also be provided with monitoring device self check button and mute button on the touch-screen.
The course of work:
(1) setting parameter
Monitoring device normally powers on, and touch-screen enters the setting parameter picture.Setting parameter comprises over the ground that actuation of an alarm value, car body number are set, overvoltage setting and recovery value are set, set desired parameters successfully after, return monitoring system touch-screen key frame.
(2) power-on self-test process
The key frame of monitoring device touch-screen shows real-time voltage information, comprise voltage between voltage and main track are over the ground between positive and negative voltage between lines, negative wire are over the ground, take 48.0V voltage as example, touch-screen shows voltage 24.0V between voltage 24.0V and main track are over the ground between positive and negative voltage between lines 48.0V, negative wire are over the ground.Press the self check button of touch-screen, the power-on self-test function on, the PLC system sends control command with self check resistance R 3 access bus main tracks, if all normally then warning circuit warnings of process of self-test, simultaneously touch-screen shows voltage 24.0V between voltage 24.0V and main track are over the ground between positive and negative voltage between lines 48.0V, negative wire are over the ground, namely stop self check by a self check button again, recover normal; If self check is not reported to the police by warning circuit then, illustrate that monitoring device has fault to check.
(3) insulating monitoring process
After monitoring device powers on, voltage sensor JK1 and voltage sensor JK1 all export the voltage signal that monitors to the voltage input end of PLC system, the PLC system processes the voltage signal that receives, and export touch-screen to and show, comprise real-time voltage value and voltage waveform, wherein magnitude of voltage comprise current dc bus positive and negative voltage between lines, negative wire over the ground between voltage and main track over the ground between voltage, the information of voltage per second refreshes once; When the d-c bus voltage value that monitors surpasses predetermined magnitude of voltage, monitoring device sends warning immediately, monitoring device can record time and the electrical leakage voltage value that electric leakage occurs automatically simultaneously, the content of record comprises voltage between voltage and main track are over the ground between electric leakage time of origin, the positive and negative voltage between lines when electric leakage occurs, negative wire are over the ground, the information of voltage per second refreshes once, and can be stored in the RAM (random access memory) card of touch-screen simultaneously, the DC48V insulation monitoring and warning device is intelligent, hommization, guarantee safe and reliable to operation, for train overhaul facilitates.
Claims (6)
1. DC48V insulation monitoring and warning device, it is characterized in that: described monitoring device comprises the PLC(Programmable Logic Controller) system, voltage sensor, warning circuit, sample circuit, power module and touch-screen, described voltage sensor input end links to each other with dc bus, output terminal links to each other with the PLC system, the PLC system processes the voltage signal that receives, and shows by touch-screen; Described warning circuit links to each other with the PLC system respectively with sample circuit.
2. DC48V insulation monitoring and warning device according to claim 1, it is characterized in that: described sample circuit comprises the first sampling resistor R1, the second sampling resistor R2 and stake resistance R4, and take circuit of neutral point to connect, the resistance of the first sampling resistor R1 and the second sampling resistor R2 equates, enters observation circuit by the automatic control linkage of PLC system.
3. DC48V insulation monitoring and warning device according to claim 1, it is characterized in that: also comprise self check resistance R 3, self check resistance R 3 links to each other with the PLC system, during the monitoring device self check, PLC system control self check resistance R 3 access observation circuits.
4. DC48V insulation monitoring and warning device according to claim 1, it is characterized in that: described voltage sensor comprises the voltage sensor JK1 of monitoring main track busbar voltage and the voltage sensor JK2 of monitoring negative wire busbar voltage, and voltage sensor JK1 and voltage sensor JK1 all export the voltage signal that monitors to the analog voltage input of PLC system.
5. DC48V insulation monitoring and warning device according to claim 1, it is characterized in that: described power module is the DC48V/DC24V power transfer module, the power module input end accesses dc bus by fuse, and output terminal is respectively voltage sensor, touch-screen and PLC system electric energy is provided.
6. DC48V insulation monitoring and warning device according to claim 1, it is characterized in that: described touch-screen has setting parameter, current record, logout and fault logging function, show in real time magnitude of voltage and the voltage waveform that monitoring system monitors, magnitude of voltage can be stored in the storage card of touch-screen immediately, is convenient to download analyze; Also be provided with monitoring device self check button and mute button on the touch-screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259124.7A CN103323716B (en) | 2013-06-26 | 2013-06-26 | DC48V insulation monitoring and warning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259124.7A CN103323716B (en) | 2013-06-26 | 2013-06-26 | DC48V insulation monitoring and warning device |
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| CN103323716A true CN103323716A (en) | 2013-09-25 |
| CN103323716B CN103323716B (en) | 2016-06-15 |
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| CN201310259124.7A Active CN103323716B (en) | 2013-06-26 | 2013-06-26 | DC48V insulation monitoring and warning device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831425A (en) * | 2017-12-15 | 2018-03-23 | 株洲中车电气科技有限公司 | A kind of train comprehensive intelligent insulation detecting method and system and device |
| CN111463799A (en) * | 2020-04-09 | 2020-07-28 | 云南电网有限责任公司电力科学研究院 | Power supply device and power supply method of voltage monitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831425A (en) * | 2017-12-15 | 2018-03-23 | 株洲中车电气科技有限公司 | A kind of train comprehensive intelligent insulation detecting method and system and device |
| CN111463799A (en) * | 2020-04-09 | 2020-07-28 | 云南电网有限责任公司电力科学研究院 | Power supply device and power supply method of voltage monitor |
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| CN103323716B (en) | 2016-06-15 |
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Address after: 266000 Shandong province Qingdao City, Ruichang Road No. 231 Applicant after: CRRC QINGDAO SIFANG VEHICLE RESEARCH INSTITUTE CO., LTD. Address before: 266000 Shandong province Qingdao City, Ruichang Road No. 231 Applicant before: Qingdao Sifang Rolling Stock Research Institute Co., Ltd. |
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