CN104614651A - Insulation detection system for motor train unit roof - Google Patents
Insulation detection system for motor train unit roof Download PDFInfo
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- CN104614651A CN104614651A CN201510066481.0A CN201510066481A CN104614651A CN 104614651 A CN104614651 A CN 104614651A CN 201510066481 A CN201510066481 A CN 201510066481A CN 104614651 A CN104614651 A CN 104614651A
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Abstract
The invention discloses an insulation detection system for a motor train unit roof. The system includes three parts as follows: (1) high voltage train roof equipment: generating high voltage during detection and isolating a high voltage train roof insulation system under operation of the motor train unit; (2) a train interior control part: mainly achieving inversion, voltage regulation, measurement and display of direct current sources output by a battery pack, data storage and control of the overall system; (3) a connection cable: achieving data transmission and system power supply. The system is installed at the motor train unit roof and can steadily operate for a long time under various complex outdoor environment and quick high-strength vibration; meanwhile the system and other high voltage equipment installed on the motor train unit roof cannot interact with each other; the system is high in reliability, convenient to operate and accurate in result.
Description
Technical field
The present invention relates to power locomotive top Insulation Inspection System, especially motor train unit top insulation pick-up unit.
Background technology
China is vast in territory, populous, and extensive movement of population problems demand solves, and high-speed railway is the safest, the most quick, most economical, most environmental protection, the most reliable mode of transportation.Development passenger traffic is that Chinese Railway realizes a modern Main way at a high speed.While EMU fast development, also exposed day by day goes out some problems, how to guarantee to ensure in the transportation environment become increasingly complex that the high-speed secure of motor train unit runs the focus having become railway main office, each Railway Bureau, locomotive depot and Railway Car Plant further.
Motor train unit roof high-tension apparatus is chronically exposed to outdoor environment, suffers the invasion and attack of the weather extremes such as sleet, dust storm, dense fog, icing, easily causes the insulating property between high voltage electric equipment and roof to reduce, make it that fault such as flashover, short circuit may occur.Because driver and conductor accurately cannot judge the reason of roof high-tension apparatus fault and formation thereof, if now blindness rising bow, may cause short circuit between roof and high-tension apparatus, result gently then can cause that roof high-tension apparatus is impaired, contact net and pantograph pan bonding, heavy then blow contact net, cause whole piece circuit to be paralysed.
Each Railway Bureau, locomotive depot are in annual autumn and winter arcing fault season occurred frequently for this reason, drop into a large amount of human and material resources, improve insulator cleanliness standard, increase wiping frequency.Anti-flashover insulating material is sprayed to porcelain insulator and roof respective regions, insulating protection is carried out to positions such as roof projection, wedge angles.However, the fault caused due to roof high voltage equipment insulation problem still happens occasionally.In order to comprehensively ensure motor train unit security of operation, maintain railway operation order, promptly and accurately find motor train unit roof high voltage equipment insulation fault and defect, need to carry out exploratory development for the insulation fault mechanism of motor train unit roof high-tension apparatus, propose practicable detection method, develop a set of insulation detection device being applicable to motor train unit roof high-tension apparatus.This device should run in movement environment for a long time out of doors, detects timely and effectively and records the insulating property of roof high-tension apparatus, can not affect again the normal work of other high-tension apparatuses of roof.The research and development of this device not only will ensure motor train unit security of operation, also improve for improving roof high-tension apparatus self insulating property the foundation that maintenance program provides qualitative analysis.
It is utilize roof voltage transformer (VT) as high-pressure generation source that motor train unit top insulation detects present situation, carries out power frequency withstand test to top insulation system.The advantage of this device is that device is simple, and without the need to installing independently high-tension testing apparatus additional at roof, but there are the following problems:
1) finite capacity of voltage transformer (VT): general 300VA ~ 400VA.The maximum current that the former limit of voltage transformer (VT) provides is 16mA (capacity is: 400VA).The result measured in the controlled environment chamber: under the filth of I level, Leakage Current can reach 40mA; Under the filth of IV level, Leakage Current can reach 100mA, can reach 250mA in short-term.2) detect voltage and be only rated voltage 25kV.According to high-voltage test techniques, just must may find potential insulation defect with the detection voltage being greater than rated voltage, the obvious defect of potential ratio has harmfulness more.3) only do the test of power frequency rated insulation voltage, can not find because of pantograph and contact net Contact and mainly disconnectedly close insulation flashover that the switching overvoltage that produces instantaneously causes or puncture.Test confirms, switching overvoltage can reach the rated voltage of 4 times.Therefore, even if non-flashover under power-frequency voltage, may flashover be there is when rising bow or puncture.5) voltage transformer (VT) is used as HT testing transformer to use, runs counter to the designed use of itself.Result is difficult to find potential insulation defect.
In view of above-mentioned deficiency, need to design a set of roof High-Voltage Insulation detection system that independently also can meet measurement capacity, ensure that the validity and reliability of testing result becomes the task of top priority.
Summary of the invention
The object of this invention is to provide a kind of motor train unit top insulation detection system, this system is arranged on motor train unit roof, can for a long time outdoor environment complicated and changeable and rapid high intensity vibration under stable operation; Can not influence each other with other high-tension apparatuses be arranged on motor train unit roof simultaneously; The features such as it is high that system has reliability, simple operation, and result is accurate.
Technical scheme of the present invention is: a kind of motor train unit top insulation detection system, and whole system is made up of following three parts,
1) roof high-tension apparatus: mainly complete the generation of high pressure during detection and get off with motor train unit running status and push up the isolation of high voltage insulation system.Comprise casing and epoxy casting cylinder, be wherein provided with HT testing transformer and permanent magnet mechanism in casing; The upper cover plate of casing adopts insulation cover plate; Be connected by high-voltage conducting wires between the high voltage leading-out terminal of HT testing transformer and the moving contact of vacuum interrupter, moving contact is connected with permanent-magnet operating mechanism by epoxy insulation pull bar.High-voltage conducting wires and vacuum interrupter are cast in epoxy casting cylinder, and permanent-magnet operating mechanism is fixed on bottom epoxy casting cylinder, and epoxy casting cylinder is fixed on insulation cover plate; Control line in casing and slotted line are connected on socket, and high pressure exit is connected with roof high-voltage conducting wires.
2) control section in car: mainly complete the inversion to the DC source that electric battery exports, pressure regulation, measurement, display, the storage of data and the control to whole system.This part comprises single-chip microcomputer, storer, pressure regulator, inverter, display screen, USB interface, keyboard interface and pilot lamp.Wherein single-chip microcomputer is responsible for response user instruction, verification pantograph and main disconnected state, controls pressure regulator and permanent magnet mechanism, is automatically completed Insulation monitoring, display and storage testing result and warning.
3) stube cable: complete data transmission and system power supply, stube cable one end is connected on socket, and the other end is connected with control box in car.
Motor train unit top insulation detection method is as follows: first system receives detection instruction, obtain pantograph, main disconnected current state, judge whether pantograph is in and fall bow, whether main circuit breaker disconnects, obtain pressure regulator, the vacuum and permanent magnet position of the switch again, whether judge pressure regulator back to zero, whether divide-shut brake position is correct, just starts to detect; Now closed vacuum and permanent magnet switch, engage relay, driving stepper motor pressure regulator stops 10s when boosting to 30kV, the state of insulation of roof high-tension apparatus is tested, if there is not flashover in this process, and leakage current does not exceed safe threshold, then show ceiling voltage and maximum leakage electric current and " detection is passed through " printed words in test, otherwise display " detects and does not pass through "; Pressure regulator playback afterwards, output voltage reduces to zero gradually, system separating brake, and under gate-dividing state, when again boosting to 30kV by pressure regulator, system is closed a floodgate, test the state of insulation of roof high-tension apparatus, if flashover does not occur this process, pressure regulator makes zero, vacuum and permanent magnet switch disconnects, relay disconnects, display detection is passed through, and by detection time, detect the writing data into memory such as voltage, leakage current, later analysis, to consult.
Function of the present invention
1) motor train unit top insulation performance is detected, and can report to the police
2) there is automatic storing data function
3) to the high voltage equipment insulation hydraulic performance decline caused because of filthy and haze, there is repair function, and then reduce the flashover fault because filthy and haze cause.
4) device includes the withstand voltage test of High-Voltage Experimentation source side just other high-tension apparatus, and the maintenance for locomotive provides conveniently.
Feature of the present invention
1) adopt independently high pressure generator to provide and can meet capacity and the voltage that roof high-tension apparatus carries out filthy experiment.
2) insulating property are high, safe and reliable.
3) metering system adopts the test of power frequency withstand test, switching overvoltage and Leakage Current detection comprehensive method to assess top insulation state.
The feature of metering system: comprehensive descision
Withstand voltage test+Leakage Current detection+switching overvoltage test
Accompanying drawing explanation
Fig. 1 is scheme of installation of the present invention.
Fig. 2 is the composition diagram of present system.
Fig. 3 is roof high pressure generator structural drawing.
Fig. 4 is the schematic diagram of present system.
Fig. 5 is present system workflow diagram.
Fig. 6 is present system Single-chip Controlling figure.
Fig. 7 is the overhaul flow chart of present system.
Embodiment
The installation of the present invention's " motor train unit top insulation detection system " and System's composition are respectively by shown in Fig. 1 and Fig. 2, and it is formed primarily of following three parts:
1) roof high-tension apparatus 11: mainly complete the generation of high pressure during detection and get off with motor train unit running status and push up the isolation of high voltage insulation system.The hardware configuration of this part as shown in Figure 3, forms primarily of with lower member:
Casing 10 and epoxy casting cylinder 3, be wherein provided with HT testing transformer 7 and permanent magnet mechanism 9 in casing 10; The upper cover plate of casing 10 adopts insulation cover plate 6; Be connected by high-voltage conducting wires 5 between the high voltage leading-out terminal of HT testing transformer 7 and the moving contact of vacuum interrupter 2, moving contact is connected with permanent-magnet operating mechanism 9 by epoxy insulation pull bar 4.High-voltage conducting wires 5 and vacuum interrupter 2 are cast in epoxy casting cylinder 3.Permanent-magnet operating mechanism 9 is fixed on bottom epoxy casting cylinder 3, and epoxy casting cylinder 3 is fixed on insulation cover plate 6; Control line in casing 10 and slotted line are connected on socket 8, and high pressure exit 1 is connected with roof high-voltage conducting wires, and high pressure exit 1 is connected with roof high-voltage conducting wires.
2) control section 13 in car: mainly complete the inversion to the DC source that electric battery exports, pressure regulation, measurement, display, the storage of data and the control to whole system.This part comprises single-chip microcomputer, storer, pressure regulator and inverter, and this portion profile as shown in Figure 2, comprises display screen 14, usb 15, keyboard interface 16 and pilot lamp 17.
3) stube cable 12: complete data transmission and system power supply, stube cable 12 one end is connected on socket 8, and the other end is connected with control box in car 13.
Fig. 4 is the fundamental diagram of present system
Principle of work of the present invention is according to Railway Electric, the relevant criterion of Power Electronic Technique and the actual conditions of motor train unit electrical principle and running environment, under motor train unit off-line state, the insulating property of roof high-tension apparatus are detected, namely system is when bow, main circuit breaker disconnection fall in pantograph, obtain electric power inversion boosting is delivered to roof high voltage bus from Vehicular accumulator cell, then AC voltage withstand test carried out to roof high-tension apparatus 11, leakage current detect and switching overvoltage test with the insulating property weighing roof high-tension apparatus 11.
Present system workflow as shown in Figure 5, after pantograph is fallen, Vehicular accumulator cell is the unique power source of full car, therefore, system need obtain direct current from accumulator, form low pressure industrial-frequency alternating current through inversion, pressure regulation, then flow to the power frequency high voltage that HT testing transformer 7 rises to testing requirements.Need between system and roof high-tension apparatus 11 to arrange vacuum and permanent magnet switch, for the simulation in the non-detection period by the isolation of the roof high-pressure system of device with to pantograph and contact net Contact when detecting.Trial voltage value and boosting curve will be controlled by dedicated control system; This system is also real-time to pantograph and main circuit breaker state, vacuum and permanent magnet switch and pressure regulator monitoring state, prevents out of control or unexpected; Control system gathers trial voltage and leakage current values, processes, and demonstrates current insulation status, and testing result is write daily record.Fig. 7 is overhaul flow chart of the present invention:
1, Insulation monitoring
Use for the ease of user and ensure that testing process is safe and reliable, the embedded control system of motor train unit insulation detection device can carry out self-inspection, calibration automatically, realize " key detects " and show detection procedure in real time, automatically preserving testing result to storer, facilitate later reference, research.
Operative installations first, need first close mainframe box air switch below.Then press the self-lock switch of control panel, now " main inversion 220V " lamp, " main+5V " lamp, " main+12V " lamp light, and represent that invertor operation, system power supply are normal.Control system starts subsequently, lights display screen 14, shows " top insulation test macro " word, the time of current system and the state of test preparation successively.
Press " test " button, system starts to check pantograph, main disconnected current state, and fall bow when detecting that pantograph is in, main circuit breaker disconnects, and on control panel, " bow falls in pantograph ", " master opens absolutely " green indicating lamp light.Reexamine voltage regulator brush position, permanent-magnet operating mechanism 9 driving stem position, determine pressure regulator back to zero, divide-shut brake position is correct, just meets testing conditions.
Pick-up unit is accessed bus by system automatic closing, starts the trial voltage exporting 0 to 30kV.10s is stopped in time boosting to 30kV, the state of insulation of roof high-tension apparatus 11 is tested, if there is not flashover in this process, and leakage current does not exceed safe threshold, then show ceiling voltage and maximum leakage electric current and " detection is passed through " printed words in test, otherwise display " detects and does not pass through ".Pressure regulator playback afterwards, output voltage reduces to zero gradually, system separating brake.And under gate-dividing state, when again boosting to 30kV by pressure regulator, system is closed a floodgate, that weighs roof high-tension apparatus with this bears switching overvoltage performance.
2, clock adjustment
Press " time adjustment " button, can adjust the system time of roof high-tension apparatus 11.Can select adjusting respectively year, month, day, hour, min, second by up-down arrow, pressing "+" key can numerically add 1 (if former numeral is 9, presses "+" key, be adjusted to 0) original.At the end of press " confirmation " button.
3, manual brake separating
Manual brake separating is when system program can not carry out automatic brake separating or emergency condition, presses " manual brake separating " key and can force system high pressure switch sub-switching operation.
4, data conversion storage
The USB flash disk or other storage mediums that are formatted as FAT32 are inserted panel usb 15, after display screen 14 is pointed out " detecting that USB flash disk inserts ", data conversion storage is selected by upper and lower key, select the month wanting unloading data, press " determination " key, can the detection daily record in selected month stored in USB flash disk, file name formats is " yyyy-mm.dat ".
Fig. 6 is the Single-chip Controlling block diagram that in car, control section 13 adopts, and wherein single-chip microcomputer is responsible for response user instruction, verification pantograph and main disconnected state, controls pressure regulator and permanent-magnet operating mechanism 9, is automatically completed Insulation monitoring, display and storage testing result and warning etc.
Under its control principle: by Vehicular accumulator cell 24V direct current access pick-up unit, voltage reduction module of leading up to exports DC+5V, DC+12V and is used for driving single-chip microcomputer and stepper motor, and another road then converts 220V/50Hz alternating current to by inverter and gives pressure regulator former limit.Single-chip Controlling stepper motor drives the angle that pressure regulator main axis is suitable, the 0 ~ 190V alternating current needed for exporting at pressure regulator secondary more by experiment transformer rise to 0 ~ 30kV and be used for testing top insulation system.Test voltage and leakage current are given Chip Microcomputer A/D passage by electric current, voltage acquisition circuit after isolation, dividing potential drop, rectification, carry out A/D conversion.Data after conversion show testing result on display screen 14 through single-chip microcomputer analysis, and by detection time, detect the writing data into memory such as voltage, leakage current, later analysis, to consult.
This device has carried out type approval test according to BL-GYJC-35-I type top insulation pick-up unit type approval test outline at locomotive Vehicle inspection station, Ministry of Railways's product quality supervision and inspection center, and indices reaches requirement.
Claims (2)
1. a motor train unit top insulation detection system, is characterized in that whole system is made up of following three parts,
1) roof high-tension apparatus (11): complete the generation of high pressure during detection and get off with motor train unit running status and push up the isolation of high voltage insulation system; Comprise casing (10) and epoxy casting cylinder (3), be wherein provided with HT testing transformer (7) and permanent magnet mechanism (9) in casing (10); The upper cover plate of casing (10) adopts insulation cover plate (6); Be connected by high-voltage conducting wires (5) between the high voltage leading-out terminal of HT testing transformer (7) and the moving contact of vacuum interrupter (2), moving contact is connected with permanent-magnet operating mechanism (9) by epoxy insulation pull bar (4), high-voltage conducting wires (5) and vacuum interrupter (2) are cast in epoxy casting cylinder (3), permanent-magnet operating mechanism (9) is fixed on epoxy casting cylinder (3) bottom, and epoxy casting cylinder (3) is fixed on insulation cover plate (6); Control line in casing (10) and slotted line are connected on socket (8), and high pressure exit (1) is connected with roof high-voltage conducting wires;
2) control section (13) in car: complete the inversion to the DC source that electric battery exports, pressure regulation, measurement, display, the storage of data and the control to whole system; This part comprises single-chip microcomputer, storer, pressure regulator, inverter, display screen (14), USB interface (15), keyboard interface (16) and pilot lamp (17), and wherein single-chip microcomputer is responsible for response user instruction, verification pantograph and main disconnected state, controls pressure regulator and permanent magnet mechanism, is automatically completed Insulation monitoring, display and storage testing result and warning;
3) stube cable (12): complete data transmission and system power supply, stube cable (12) one end is connected on socket (8), and the other end is connected with control box in car (13).
2. motor train unit top insulation detection system as claimed in claim 1, it is characterized in that described motor train unit top insulation detection method is as follows: first system receives detection instruction, obtain pantograph, main disconnected current state, judge whether pantograph is in and fall bow, whether whether main circuit breaker disconnects, then obtains pressure regulator, vacuum switch position, judge pressure regulator back to zero, whether divide-shut brake position is correct, just starts to detect; Now closed vacuum switch, engage relay, driving stepper motor pressure regulator stops 10s when boosting to 30kV, the state of insulation of roof high-tension apparatus is tested, if there is not flashover in this process, and leakage current does not exceed safe threshold, then show ceiling voltage and maximum leakage electric current and " detection is passed through " printed words in test, otherwise display " detects and does not pass through "; Pressure regulator playback afterwards, output voltage reduces to zero gradually, system separating brake, and under gate-dividing state, when again boosting to 30kV by pressure regulator, system is closed a floodgate, test the state of insulation of roof high-tension apparatus, if flashover does not occur this process, pressure regulator makes zero, vacuum switch disconnects, relay disconnects, display detection is passed through, and by detection time, detect the writing data into memory such as voltage, leakage current, later analysis, to consult.
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| CN201510066481.0A CN104614651A (en) | 2015-02-09 | 2015-02-09 | Insulation detection system for motor train unit roof |
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| CN201510066481.0A CN104614651A (en) | 2015-02-09 | 2015-02-09 | Insulation detection system for motor train unit roof |
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Cited By (9)
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| CN106526393A (en) * | 2016-12-30 | 2017-03-22 | 西南交通大学 | Bow net electric contact simulation experiment apparatus |
| CN107526013A (en) * | 2017-10-17 | 2017-12-29 | 中车株洲电力机车有限公司 | Control method, device and the medium of a kind of high-voltage isulation detection of locomotive |
| CN108400557A (en) * | 2018-02-12 | 2018-08-14 | 方晓妹 | A kind of locomotive roof electric appliance pressure test high-voltage line mounting device |
| CN108427052A (en) * | 2018-05-11 | 2018-08-21 | 珠海银隆电器有限公司 | A kind of connecting detection device, charging measurement system and charging-discharge tester system |
| CN109839578A (en) * | 2018-05-07 | 2019-06-04 | 广东电网有限责任公司 | A kind of portable insulating rod insulation performance test instrument |
| CN110542836A (en) * | 2018-06-25 | 2019-12-06 | 中车长春轨道客车股份有限公司 | EMUs roof insulation detection device |
| CN111308297A (en) * | 2018-12-12 | 2020-06-19 | 中车唐山机车车辆有限公司 | Insulation detection device |
| CN111487558A (en) * | 2020-04-02 | 2020-08-04 | 中车青岛四方机车车辆股份有限公司 | Fault positioning device and method for high-voltage system of train |
| CN112731084A (en) * | 2020-12-28 | 2021-04-30 | 北京深思数盾科技股份有限公司 | Transformer testing device and testing method |
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| CN111308297A (en) * | 2018-12-12 | 2020-06-19 | 中车唐山机车车辆有限公司 | Insulation detection device |
| CN111487558A (en) * | 2020-04-02 | 2020-08-04 | 中车青岛四方机车车辆股份有限公司 | Fault positioning device and method for high-voltage system of train |
| CN112731084A (en) * | 2020-12-28 | 2021-04-30 | 北京深思数盾科技股份有限公司 | Transformer testing device and testing method |
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