CN202260424U - Mining optical longitudinal override trip protection device - Google Patents
Mining optical longitudinal override trip protection device Download PDFInfo
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- CN202260424U CN202260424U CN201120348704XU CN201120348704U CN202260424U CN 202260424 U CN202260424 U CN 202260424U CN 201120348704X U CN201120348704X U CN 201120348704XU CN 201120348704 U CN201120348704 U CN 201120348704U CN 202260424 U CN202260424 U CN 202260424U
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- optical fiber
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Abstract
A mining optical longitudinal override trip protection device is suitable for relay protection of the electric transmission line of an underground power supply system. The trip protection device is an optical longitudinal protection device which is installed in each substation; and the optical longitudinal protection devices are connected with one another through a system bus. The optical longitudinal protection device adopts the structure that a CPU main board is in both-way communication with a signal processing module, a man-machine interface and an optical communication module; a power module is connected with the CPU main board, the signal processing module, the man-machine interface and the optical communication module; the man-machine interface is composed of an LCD, a keyboard and an infrared remote controller; and the optical communication module consists of a single mode fiber interface and a multimode fiber interface. The optical longitudinal protection device is provided with functions such as emergency instant quick-break protection, timing quick-break protection, and over-current protection, solves the difficult problem of frequent underground override trip, confines the fault to the minimal range, and replaces a traditional simulation protector and a microcomputer protector.
Description
Technical field
The utility model relates to a kind of protective relaying device and method of underground power supply system transmission line, the vertical overstep tripping protective device that joins of particularly a kind of mine optical fiber.
Background technology
Electric power system is the power resources of downhole production, and the transmission line important part that is it.The safety of electric power system not only is related to production, also is related to underground work personnel's safety.Present underground power supply used voltage constantly raises, and part mine 6kV high pressure is directly to the fully mechanized coal face power supply, because fully mechanized coal face works under hard conditions; Environment is abominable, and the safety problem of bringing also becomes increasingly conspicuous, and high-tension cable is easy to impaired; Be prone to electric leakage or short circuit accident take place, and then cause high anti-switch overstep tripping.
Because the particularity of subsurface environment during transmission line malfunction, as can not in time excising or the mistake excision, all can cause bigger influence to whole electric power system, even cause a serious accident.Supply line's protective device is undertaken the vital task that ensures down-hole transmission of electricity safety, and underground power supply system is the same with ground power supply system, and the requirement basic to protective device will possess selectivity, rapidity, sensitivity and reliability.Reliability is not only the reliability of protection, also comprises the reliability of protector self.Collateral security production angle says that selectivity is the most basic requirement of protective device, and selectivity requires protector when action, only excises faulty component, reduces the power failure scope, and searches the position that fault takes place easily.
Because underground power supply used circuit all adopts copper cash; And circuit is very short between the electric substations at different levels, and line impedance is very little, thereby when causing failed because; Each inter-stage short circuit current does not almost have difference; Like this protective relaying device of each grade just accurately failure judgement whether occur in the protection zone of oneself, simultaneously because the specific (special) requirements of colliery supply network such as subordinate's protection should be littler than the time limit of higher level's protection, if the previous stage inlet wire of substation protection time limit is very little; Just can't protecting of next stage protective device adjusted like this, and traditional to pass through the method that the time difference carries out selective protection just unworkable.Protect the time limit too big if adjust, relaying protection system has just been lost rapidity, can not in time excise fault; Protection time limit of adjusting is too little, in case the latter end circuit breaks down, will cause overstep tripping protection, in case overstep tripping takes place, can cause the expansion of down-hole power failure scope, gently then causes stopping production, and is heavy then major accident takes place.Jump to central substation or even ground main transformer if bypass the immediate leadership, whole production system will be paralysed.
Summary of the invention
The purpose of the utility model is the deficiency that overcomes in the prior art; Provide a kind of mine optical fiber the vertical overstep tripping protective device that joins; Solve the problem of the overstep tripping that protective device exists under the existing well, the quick excision fault when guaranteeing normal safety of moving of electric power system and fault.
The purpose of the utility model be achieved in that vertical join the overstep tripping protective device be installed in the electric substation, by the optical fiber pilot protection device that system bus links together, optical fiber pilot protection device comprises power module, signal processing module, cpu motherboard, man-machine interface, optical fiber communication module, LCDs, keyboard, IR remote controller; Two-way communication is connected cpu motherboard with the optical fiber communication module with signal processing module, man-machine interface, and power module is connected with cpu motherboard, signal processing module, man-machine interface and optical fiber communication module; Described man-machine interface comprises LCDs, keyboard and IR remote controller; Described optical fiber communication module comprises monomode fiber interface and the multimode fiber interface that is used to connect different fiber.
Beneficial effect is whole device power supply owing to adopted such scheme, optical fiber pilot protection device power module, takes from the voltage transformer secondary; Signal processing module becomes voltage signal and current signal and send, changes, transmits, and the signal strength signal intensity of voltage signal and current signal is transformed in the level of signal scope of microprocessor processes; The data that cpu motherboard is sent here signal processing module are handled; Whether fault is judged to supply line according to result; Protect fast when carrying out communication and fault, and give the LCDs in the man-machine interface data of gathering with other optical fiber pilot protection devices; Described man-machine interface mainly comprises LCDs, keyboard and IR remote controller; LCDs shows the system parameters of measurements and calculations and the fault that is taken place; Keyboard sends instruction to cpu motherboard; Retrieve for examination current system parameters, failure logging, operation note, setup parameter, IR remote controller carries out remote operation; The optical fiber communication module is the interface that carries out communication between the optical fiber pilot protection device, and the information that microprocessor on the cpu motherboard sends is carried out the electric light conversion, carries out opto-electronic conversion for the information that receives; Described optical fiber communication module comprises two kinds of interfaces, is respectively monomode fiber interface and multimode fiber interface, is used to connect different fibers; Solved the problem of the overstep tripping that protective device exists under the existing well, the quick excision fault when guaranteeing normal safety of moving of electric power system and fault.Can be good at solving electric power system overstep tripping problem; Possess urgent instantaneous fast tripping protection, in limited time fast tripping protection, overcurrent protection (overload protection) function simultaneously; Wherein urgent instantaneous fast tripping protection can come into operation under the situation that optical cable is destroyed, and fast tripping protection, reserve overcurrent protection (overload protection) in limited time can be come into operation always.Be applicable to the underground power supply system of 10kV and following electric pressure, solve the common overstep tripping difficult problem in down-hole, be limited in minimum zone to fault.Various faults for electric power system also can in time detect, report to the police and protect.Can substitute conventional analogue protector and Microcomputer Protection device.
Description of drawings
Fig. 1 is an optical fiber pilot protection device connection layout.
Fig. 2 is a light pilot protection configuration schematic diagram.
Among the figure, 1, power module; 2, signal processing module; 3, cpu motherboard; 4, man-machine interface; 5, optical fiber communication module; 6, crystal display screen; 7, keyboard; 8, IR remote controller; 9, monomode fiber interface; 10, multimode fiber interface; 11, optical fiber pilot protection device.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done further description:
The device of the trip protection of the utility model is an optical fiber pilot protection device, and optical fiber pilot protection device is installed in each electric substation, connects through system bus between each optical fiber pilot protection device; Optical fiber pilot protection device comprises power module 1, signal processing module 2, cpu motherboard 3, man-machine interface 4, optical fiber communication module 5, LCDs 6, keyboard 7, IR remote controller 8, monomode fiber interface 9 and multimode fiber interface 10; 5 two-way communications are connected cpu motherboard 3 with the optical fiber communication module with signal processing module 2, man-machine interface 4, and power module is connected with cpu motherboard 3, signal processing module 2, man-machine interface 4 and optical fiber communication module 5; Described man-machine interface 4 comprises LCDs 6, keyboard 7 and IR remote controller 8; Described optical fiber communication module 5 comprises monomode fiber interface 9 and multimode fiber interface 10.Power module 1 is whole device power supply, takes from the voltage transformer secondary; 2 pairs of voltage signals of signal processing module and current signal become and send, change, transmit, and the signal strength signal intensity of voltage signal and current signal is transformed in the level of signal scope of microprocessor processes; The data that 3 pairs of signal processing modules 2 of cpu motherboard are sent here are handled; Whether fault is judged to supply line according to result; Protect fast when carrying out communication and fault, and give the LCDs in the man-machine interface 4 data of gathering with other optical fiber pilot protection devices; Described man-machine interface 4 mainly comprises LCDs 6, keyboard 7 and IR remote controller 8; LCDs 6 shows the system parameters of measurements and calculations and the fault that is taken place; Keyboard 7 sends instruction to cpu motherboard 3; Retrieve for examination current system parameters, failure logging, operation note, setup parameter, IR remote controller 8 carries out remote operation; Optical fiber communication module 5 is the interfaces that carry out communication between the optical fiber pilot protection device, and the information that microprocessor on the cpu motherboard 3 sends is carried out the electric light conversion, carries out opto-electronic conversion for the information that receives; Described optical fiber communication module 5 comprises two kinds of interfaces, is respectively monomode fiber interface 9 and multimode fiber interface 10, is used to connect different fibers; Described cpu motherboard 3 adopts dual processor; Can accomplish protection, realize remote measurement, remote signalling, distant control function, cpu motherboard 3 has various communication interfaces; Also have power down simultaneously and keep battery, guarantee that optical fiber pilot protection device works on a period of time behind system's power supply trouble; High-precision A on the cpu motherboard 3/D sampling module is gathered three-phase voltage and current parameters in real time; The electric power system parameter information of the phase voltage of real-time demonstration electric power system, line voltage, residual voltage, line current, phase current, zero-sequence current, frequency, power factor, active power, reactive power.
The operation principle and the course of work: overstep tripping protection direction of passage comparison expression pilot protection; Utilize the Optical Fiber Transmission block signal, comprehensively relatively the fault direction of each end protection of this circuit is differentiated thin information to confirm fault section, and fault section is divided into this line-internal and external fault; During this line-internal fault; The pilot protection action, during external fault, pilot protection is failure to actuate; Configuration optical fiber pilot protection device constitutes a zone between each grade electric substation in electric substations at different levels, and optical fiber pilot protection device reliably is failure to actuate to error protection outside the zone to the zero time limit tripping operation of regional internal short-circuit fault; Load side configuration quick-break/overcurrent protection realizes the excision of zero time limit to short trouble in the line terminal; For electric motor protecting, definite time-lag overload protection, inverse-time overcurrent protection, electric motor starting definite value switch protecting, under-voltage protection, overvoltage protection, negative phase-sequence protection.
Fig. 2 is a power supply branch road in colliery; Optical fiber pilot protection device at all loaded termination circuits is all set no time limit fast tripping protection and 8S overload, and the optical fiber pilot protection device of one-level circuit up to the electric power system end of incoming cables is all set no time limit optical fiber pilot protection, 0.2S prescribe a time limit fast tripping protection and 8S overload protection above that.When central electric substation 2 inlet wire optical fiber pilot protection devices detect when breaking down; Optical fiber pilot protection device converts block signal to light signal and is delivered to higher level electric substation; The optical fiber pilot protection device of higher level electric substation receives block signal, thus the protection in the locking respective switch; When central electric substation 2 outlet optical fiber pilot protection devices detect fault, send block signal equally, give upper level optical fiber pilot protection device, the locking corresponding protection after block signal is synthetic; When central substation 2 outlet optical fiber pilot protection devices detect fault; Send block signal, also sent the protection trip signal, but when tripping appears in switch; Upper level optical fiber pilot protection device is not elimination of fault behind the 150ms after detecting block signal, then quickens tripping operation; When central substation 2 outlet optical fiber pilot protection devices detected fault, optical fiber pilot protection device broke down and does not send block signal, directly by the quick-break would trip in the upper level optical fiber pilot protection device control respective switch; When breaking down on central electric substation 2 inlet wires and the bus; At first by central substation 2 inlet wire optical fiber pilot protection devices control respective switch action excision fault; When the switch tripping of central electric substation 2 inlet wire optical fiber pilot protection devices control, its switch of upper level optical fiber pilot protection device control of this optical fiber pilot protection device quickens tripping operation.Each grade circuit for electric power system has all had corresponding protection like this; When breaking down, the corresponding protection action is all arranged, in the fault zone if one's respective area protection tripping; Upper level has the corresponding protection action; Guarantee that faulty line reliably excises, prevent overstep tripping, the power failure scope is controlled at minimum.
Claims (2)
1. a mine optical fiber is indulged and is joined the overstep tripping protective device; It is characterized in that: vertical join the overstep tripping protective device be installed in the electric substation, by the optical fiber pilot protection device that system bus links together, optical fiber pilot protection device comprises power module, signal processing module, cpu motherboard, man-machine interface, optical fiber communication module, LCDs, keyboard, IR remote controller; Two-way communication is connected cpu motherboard with the optical fiber communication module with signal processing module, man-machine interface, and power module is connected with cpu motherboard, signal processing module, man-machine interface and optical fiber communication module; Described man-machine interface comprises LCDs, keyboard and IR remote controller.
2. the vertical overstep tripping protective device that joins of mine optical fiber according to claim 1, it is characterized in that: described optical fiber communication module comprises monomode fiber interface and the multimode fiber interface that is used to connect different fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120348704XU CN202260424U (en) | 2011-09-19 | 2011-09-19 | Mining optical longitudinal override trip protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120348704XU CN202260424U (en) | 2011-09-19 | 2011-09-19 | Mining optical longitudinal override trip protection device |
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| Publication Number | Publication Date |
|---|---|
| CN202260424U true CN202260424U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120348704XU Expired - Fee Related CN202260424U (en) | 2011-09-19 | 2011-09-19 | Mining optical longitudinal override trip protection device |
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| CN (1) | CN202260424U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306928A (en) * | 2011-09-19 | 2012-01-04 | 中国矿业大学 | Mining fiber longitudinal override trip protection device and method thereof |
-
2011
- 2011-09-19 CN CN201120348704XU patent/CN202260424U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306928A (en) * | 2011-09-19 | 2012-01-04 | 中国矿业大学 | Mining fiber longitudinal override trip protection device and method thereof |
| CN102306928B (en) * | 2011-09-19 | 2014-07-16 | 中国矿业大学 | Mining fiber longitudinal override trip protection device and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20150919 |
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| EXPY | Termination of patent right or utility model |