CN101662138A - Electric locomotive power supply line comprehensive protection device for mine - Google Patents
Electric locomotive power supply line comprehensive protection device for mine Download PDFInfo
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- CN101662138A CN101662138A CN200910018473A CN200910018473A CN101662138A CN 101662138 A CN101662138 A CN 101662138A CN 200910018473 A CN200910018473 A CN 200910018473A CN 200910018473 A CN200910018473 A CN 200910018473A CN 101662138 A CN101662138 A CN 101662138A
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- 230000003137 locomotive effect Effects 0.000 title claims abstract description 27
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- 230000015572 biosynthetic process Effects 0.000 claims description 3
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- 230000009471 action Effects 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
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- 101100028967 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) PDR5 gene Proteins 0.000 description 1
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Abstract
The invention relates to an electric locomotive power supply line comprehensive protection device for a mine, which comprises a microcomputer main circuit, a direct current chopper circuit, a monitoring power source, a data acquisition circuit, a control pulse circuit, a tripping circuit and a human-machine circuit. The electric locomotive power supply line comprehensive protection device has theadvantages that over-voltage, over-current, short circuit or power leakage fault comprehensive protecting function of a stringing electric fence is realized by a set of microcomputer device which hasaccurate action, setting action constant value, convenient adjustment and high reliability, can realize the self-check of an on-line device, history record query and intelligent functions compared with a conventional protecting device.
Description
Technical field
The present invention relates to the protection unit of electrical measuring devices technology, relate in particular to mining electric locomotive direct current supply line protective device.
Background technology
In China mine, single overhead wire formula dc electric formula electric locomotive is widely used as the important transporting equipment in down-hole.Its DC power supply apparatus generally is made up of with rectifier transformer, three-phase bridge rectifier circuit, relay protection circuit and function circuit traction.DC power supply apparatus is transformed to the direct current of pulsation with the three-phase alternating current of input, powers to electric locomotive by contact wire that is erected at the electric locomotive top and the traction network that utilizes conveying track double as return wire to constitute.This means of transportation advantage is a lot, but because the restriction in underworkings space, exposed contact wire can not lay very high, the tunnel gradient is bigger in addition, traction load often occurs transshipping and the situation of short circuit, and simultaneously because the tunnel is narrow, situations such as illumination deficiency have caused bigger threat to the staff, the bigger mine of some Tunnel Pressure particularly, human body touch the casualty accident that stringing causes and happen occasionally.Therefore, the monitoring stringing electrical network that passes through is realized functions such as overvoltage, overcurrent, short circuit and earth leakage protective, has great importance.The trolley locomotive DC power supply apparatus of current domestic and international employing; generally only adopt current relay, voltage relay and the thermal relay of electromagnetic type to realize voltage, overcurrent, short-circuit protection; these relay settings, adjustment inconvenience; poor reliability, malfunction in the real work, tripping phenomenon happen occasionally.For earth leakage protective, there be a kind of the employing to add the technical scheme that alternating voltage is monitored insulation resistance both at home and abroad, adopt the AC power that is different from working power in essence to make to detect power supply, the insulation resistance of continuous monitoring stringing electrical network in this scheme.When human electric shock or the serious reduction of stringing insulation, can cut off dc power supply at short notice.In this scheme, electrical network parameter must be used distributed constant, in concrete implementation process, and the normal phenomenon that inaccurate misoperation occurs causing monitoring because of the variation of distributed constant, so this scheme does not come into operation at the scene.
Summary of the invention
The purpose of this invention is to provide a kind of electric locomotive power supply line comprehensive protection device for mine; it has functions such as measurement, calculating, storage memory, protection action, warning, and overvoltage, overcurrent, short circuit and the leak current fault of mining electric locomotive supply line are realized integrated protection.
For achieving the above object; technical scheme of the present invention is that electric locomotive power supply line comprehensive protection device for mine mainly is made up of roads such as microcomputer main circuit, DC chopper circuit, monitoring power supply, data acquisition circuit, control impuls circuit, trip circuit, man-machine interfaces.
Microcomputer main circuit: the host CPU chip adopts fully-integrated mixed-signal system level chip C8051F, and other joins flash memory and real time clock circuit.C8051F is the type that a kind of extremely is suitable for TT﹠C system, and it has adopted pipelining, and the execution efficient height of instruction has comprised multiple resources such as house dog, ADC, DAC, voltage reference output, timer in the sheet, and integrated JTAG, supports online programming.Flash memory (Flash) and real time clock circuit are used for storage system parameter preset, accident record and the corresponding moment is provided.
DC chopper circuit: adopting by IGBT is the Buck converter that master chip constitutes, and the output of stringing electrical locomotive DC power supply is controlled, and provided working power for electric locomotive.
The monitoring power supply: adopting DC-DC isolated variable power supply, is the earth leakage protective power supply in stringing loop.
Data acquisition circuit: comprise the circuit such as voltage formation, low-pass filtering protective circuit, signal measurement amplification of direct current, voltage signal, be used for the electric current and the voltage of measurement bay line loop, and signal is delivered in the A/D converter in the microcomputer main circuit.
Control impuls circuit: by sending the operating state of pulse control DC chopper circuit and monitoring power supply.
Tripping operation output loop: when when microcomputer main circuit is judged fault such as supply network generation overvoltage, overcurrent, short circuit and electric leakage through program, sending trip signal,, make the circuit breaker trip of DC power supply through the tripping operation output circuit.
Man-machine interface circuit: form by circuit such as warning circuit, Chinese fonts lcd module, keyboards.
After electric locomotive power supply line comprehensive protection device for mine entered operating state, microcomputer main circuit control DC chopper circuit and monitoring power supply took turns to operate.DC power supply output to stringing electrical locomotive during IGBT conducting in DC chopper circuit work is controlled, and provides working power for electric locomotive.The trigger impulse of IGBT when the monitoring power supply drops in the microcomputer main circuit blockade DC chopper circuit makes its shutoff.Electric current and the instantaneous voltage of microcomputer main circuit by the real-time measurement bay line loop of data acquisition circuit, and carry out digital Filtering Processing, then be kept at flash memory in setting value compare.When any fault such as overvoltage, overcurrent, short circuit and electric leakage occurring when electrical network, the relation of instantaneous value and setting value satisfies operation equation, by the tripping operation output loop, cuts off the DC power supply of stringing electrical locomotive.Advantage of the present invention is to utilize a cover microcomputer device to realize overvoltage, overcurrent, short circuit or the leak current fault integrated protection function of stringing electrical network;, action fixed value adjusting, easy to adjust more accurate than traditional protective device action; the reliability height; and can be implemented in intelligent functions such as self-check of device, historical record inquiry.
Description of drawings
The system block diagram of Fig. 1 apparatus of the present invention;
Fig. 2 schematic block circuit diagram of the present invention;
Embodiment
Embodiment
The present invention is a kind of electric locomotive power supply line comprehensive protection device for mine, and it has functions such as measurement, calculating, storage memory, protection action, warning.As shown in Figure 1, it mainly is made up of roads such as microcomputer main circuit, DC chopper circuit, monitoring power supply, data acquisition circuit, control impuls circuit, trip circuit, man-machine interfaces.In the drawings, M is the DC motor of mining electric locomotive, and diode D10 is a fly-wheel diode, and D8, D11 are used for working power and the isolation of monitoring power supply.
The host CPU chip adopts fully-integrated mixed-signal system level chip C8051F020 as shown in Figure 2, comprised in its sheet that house dog, sampling rate are multiple resources such as 12 ADC of 100ksps, 12 DAC, voltage reference output, timer, and integrated JTAG, support online programming.After electric locomotive power supply line comprehensive protection device for mine entered operating state, microcomputer main circuit control DC chopper circuit and monitoring power supply took turns to operate.DC power supply output to stringing electrical locomotive during IGBT conducting in DC chopper circuit work is controlled, and provides working power for electric locomotive.The trigger impulse of IGBT when the monitoring power supply drops in the microcomputer main circuit blockade DC chopper circuit makes its shutoff.The electric current in stringing loop and voltage; insert by Hall element LEM1 through binding post; LEM2, operational amplifier LM324 are data acquisition circuits such as the main voltage formation that makes up, low-pass filtering protective circuit, signal measurement amplification, through becoming 0～2.5V voltage signal that ADC can handle in the C8051F020 sheet after the forward path conditioning.The conversion of CPU timing acquiring ADC output in the C8051F sheet; through behind the digital filtering; carry out numerical computations and judgement; when any faults such as overvoltage, overcurrent, short circuit and electric leakage occurring when electrical network; the relation of instantaneous value and setting value satisfies operation equation, by the tripping operation output loop, cuts off the DC power supply of stringing electrical locomotive; and send alarm signal, realize the integrated protection function.
Each numerical value of stringing electrical network that microcomputer main circuit calculates is kept at and forms historical record among the flash memory 24C256 and send Chinese fonts lcd module to show in real time.Keyboard circuit is total to be shifted, to adjust, confirms, withdraws from four keys, and the keyboard multiplexing function that adopts during programming cooperates menu in Chinese can realize work such as parameter setting, historical record inquiry, clock alignment easily.
Claims (1)
1, a kind of electric locomotive power supply line comprehensive protection device for mine, it comprises microcomputer main circuit, DC chopper circuit, monitoring power supply, data acquisition circuit, control impuls circuit, trip circuit and man-machine interface, it is characterized in that described microcomputer main circuit host CPU chip adopts fully-integrated mixed-signal system level chip C8051F, other joins flash memory and real time clock circuit; It is the Buck converter that master chip constitutes that described DC chopper circuit adopts by IGBT, the output of stringing electrical locomotive DC power supply is controlled, and provided working power for electric locomotive; Described monitoring power supply adopts DC-DC isolated variable power supply, is the earth leakage protective power supply in stringing loop; Described data acquisition circuit comprises voltage formation, low-pass filtering protective circuit, the signal measurement amplifying circuit of direct current, voltage signal, is used for the electric current and the voltage of measurement bay line loop, and signal is delivered in the A/D converter in the microcomputer main circuit; Described man-machine interface circuit is made up of warning circuit, Chinese fonts lcd module, keyboard circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910018473A CN101662138A (en) | 2009-09-29 | 2009-09-29 | Electric locomotive power supply line comprehensive protection device for mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910018473A CN101662138A (en) | 2009-09-29 | 2009-09-29 | Electric locomotive power supply line comprehensive protection device for mine |
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| Publication Number | Publication Date |
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| CN101662138A true CN101662138A (en) | 2010-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910018473A Pending CN101662138A (en) | 2009-09-29 | 2009-09-29 | Electric locomotive power supply line comprehensive protection device for mine |
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| CN (1) | CN101662138A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103612595A (en) * | 2013-11-22 | 2014-03-05 | 青岛海尔软件有限公司 | C8051F single chip microcomputer based ultrasonic distance measuring backup reminder |
| CN104237603A (en) * | 2014-08-28 | 2014-12-24 | 深圳供电局有限公司 | Relay protection multi-outlet pressing plate pulse voltage detection device |
| CN106684845A (en) * | 2015-11-09 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Train main circuit protection method and device |
| CN111372203A (en) * | 2020-03-17 | 2020-07-03 | 青岛中加特电气股份有限公司 | Mining wireless system of striking a little to propaganda directed along line |
| CN115173374A (en) * | 2022-06-14 | 2022-10-11 | 中铁建电气化局集团第三工程有限公司 | Relay protection method, device, medium and equipment for traction power supply system |
-
2009
- 2009-09-29 CN CN200910018473A patent/CN101662138A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103612595A (en) * | 2013-11-22 | 2014-03-05 | 青岛海尔软件有限公司 | C8051F single chip microcomputer based ultrasonic distance measuring backup reminder |
| CN104237603A (en) * | 2014-08-28 | 2014-12-24 | 深圳供电局有限公司 | Relay protection multi-outlet pressing plate pulse voltage detection device |
| CN106684845A (en) * | 2015-11-09 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Train main circuit protection method and device |
| CN106684845B (en) * | 2015-11-09 | 2019-01-08 | 中车大连电力牵引研发中心有限公司 | Train main-circuit protection method and device |
| CN111372203A (en) * | 2020-03-17 | 2020-07-03 | 青岛中加特电气股份有限公司 | Mining wireless system of striking a little to propaganda directed along line |
| CN115173374A (en) * | 2022-06-14 | 2022-10-11 | 中铁建电气化局集团第三工程有限公司 | Relay protection method, device, medium and equipment for traction power supply system |
| CN115173374B (en) * | 2022-06-14 | 2023-11-21 | 中铁建电气化局集团第三工程有限公司 | Relay protection method, device, medium and equipment for traction power supply system |
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Open date: 20100303 |