CN203617679U - Novel electric arc light protecting system - Google Patents
Novel electric arc light protecting system Download PDFInfo
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- CN203617679U CN203617679U CN201320462235.3U CN201320462235U CN203617679U CN 203617679 U CN203617679 U CN 203617679U CN 201320462235 U CN201320462235 U CN 201320462235U CN 203617679 U CN203617679 U CN 203617679U
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Abstract
The utility model relates to a novel electric arc light protecting system, which is characterized in that the protecting system comprises a dedicated controller (1), an arc light signal conversion module (2), an electric arc light probe (3), an electric current transducer (4), a speed-sensitive switch (5), a connection optical fiber (6) and a conventional switch group (7). The apparatus uses a special controller to analyze and process an arc light signal and an electric current signal, recognizes effective electric arc light fault and makes response so as to output a separating brake trigger signal that has an effect on the conventional switch group and/or the speed-sensitive switch according to a predetermined logic. The positive effects of the utility model are as follows: 1. simplify the electronic controlling system of the electric arc light protecting system with the premise of guaranteeing reliable functions fully; 2. adopt special algorithm to realize fast and precise recognition of the electric arc light fault; and 3. use the speed-sensitive switch device to cut-off fault current within 10 ms so as to guarantee the security of the power distribution system, the power distribution devices, the surroundings and the persons, and provide favorable conditions to recover power supply quickly.
Description
Technical field
The present invention relates to a kind of Novel electric arc light protection system, belong to power transformation, distribution and with electrical domain, be mainly used in arclight monitoring and the protection fast of 40.5kV and following Medium Voltage Switchgear or other distribution equipment inside.
Background technology
In distribution system, a large amount of common faults of Medium Voltage Switchgear that adopt have four classes at present: operating mechanism fault, and insulating element is aging, conduction bad connection and part quality defect, these faults finally all will develop into arc fault, cause system short-circuit.In transformation and distribution system, the typical response time of transformer standby overcurrent protection is 1.2s-1.4s; Adopting the transformer standby overcurrent protection typical response time of feeder line fast tripping protection locking is 300ms-400ms; High impedance protection typical response time 35ms-60ms, but protection range is limited by CT installation site, and expensive.At medium voltage network, due to the general not bus rapid protecting device of configure dedicated, once occur arc fault, the response time that traditional protection device is grown causes lead-in circuit breaker not trip in time, has deepened severity of injuries, has expanded breakdown loss.In addition, arc fault directly threatens the safety of substation equipment and the person.There is hundreds of people in the whole world because switchgear arc fault is injured even dead every day, and this type of accident not only occurs in the country of the strict safety standard of shortcoming, even if obtain the country of strict implement in safety standard, also often occurs arc fault casualty accident.In middle low-pressure system, the very large probability of arc fault can cause bus three-phase arc short-circuit, and causes serious consequence.In arc fault, fault electric arc can discharge surprising energy, and the adjacent switchgear of fault or the operations staff that closes on are caused serious injury.
For these reasons; in power test chamber or transformation and distribution system usually need that the important area of the electric arc that may break down is carried out to fault current and arc light and survey; carry out judgment device running status or noly need to carry out emergency processing with this, so arc light protection system arises at the historic moment.
The operation principle of existing arc light protection system is mainly; utilize arc photosensor, current transformer to obtain the fault characteristic signals of monitoring target; designing special control device analyzes characteristic signal; if be judged as device interior arc fault; export the sub-gate circuit that executive signal acts on ordinary tap group, guarantee that fault is cut in 100ms.For large current failure electric arc, the service restoration time longer after the destruction that the duration of 100ms causes equipment and accident still can not be accepted.So there is company to make the executive signal of dedicated control device output not only act on ordinary tap group abroad, and act on a special high speed grounding switch, make distribution system bus short circuit metal carry out the fault current of transferred arc passage by this high speed grounding switch, make the elimination time shorten of fault electric arc in 10ms, greatly alleviate the destructiveness that fault electric arc causes.The shortcoming of doing is like this: although distribution bus metallic short circuit has been eliminated electric arc fast, but not fast shut-off fault current, manufacture on the contrary a larger short circuit current, distribution system and relevant main equipment have been caused to dangerous impact, the safety of distribution system has been brought to new negative effect.
The present invention is directed to the above-mentioned shortcoming that current arc light protection system exists, adopt speed-sensitive switch fast shut-off arc fault in 10ms, guaranteed to greatest extent the safety of distribution system, for electric arc protection has found desirable technical solution.
Summary of the invention
The object of the present invention is to provide a kind of new effective technology means of electric arc protection; can not only identify fast and accurately arc fault; and can eliminate fast fault, make electric arc drop to minimum to the threat of distribution system, controller switching equipment, surrounding environment and personal safety.
The object of the invention is to realize by following approach: technical scheme comprises nonshared control unit, arc optical signal modular converter, arclight probe, current sensor, speed-sensitive switch, connection optical fiber and ordinary tap group.The photosensitive module LX1972 of the highly sensitive wide region of said arclight probe employing or ON9658 are as core component, within the scope of 0-50kLux, visible light illumination is made to linear response, the setting that has facilitated arc light to adjust threshold, arclight probe can be used to detect arclight signal, and this signal is input to arc optical signal modular converter by shielded type cable.Said arc optical signal modular converter, the signal of multichannel arc probe is concentrated in together, carrying out exclusive disjunction by its internal logic circuit can gather Multi-path electricity arc probe signal, signal after gathering is connected to an optical fiber interface by light signal output circuit, transfers signals to arc light passage corresponding on nonshared control unit by this interface by connecting optical fiber.Said current sensor, can be traditional current transformer, can be also Luo-coil, and its signal is input to the analog channel of nonshared control unit.Said nonshared control unit, comprise single-chip microcomputer or DSP intelligent chip, can complete the analyzing and processing of arc optical signal and current signal, the effective arclight fault of logic identification that foundation is predetermined also responds, and exports separating brake triggering signal and acts on ordinary tap group and/or speed-sensitive switch.Said speed-sensitive switch refers to short circuit current limiter or Fast Speed Vacuum Circuit Breaker; they can be controlled by nonshared control unit; as the high end configuration of novel arc light protecting system; there is arc fault judgment device inside; simultaneous faults electric current exceedes set point; nonshared control unit output sub-gate signal acts on short circuit current limiter or Fast Speed Vacuum Circuit Breaker, and fault current can be by fast shut-off in 10ms, and fault electric arc also disappears immediately.
Good effect of the present invention is: fully guaranteeing, under the prerequisite of reliable function, to have simplified the electronic control system of arc light protection system 1..Adopt particular algorithm, realized arclight fault fast, accurately identification.3. adopt speed-sensitive switch equipment, in 10ms, cut-off fault current, guarantee the equivalent energy ∫ i of fault electric arc
2dt drops to minimum, thereby guarantees distribution system to greatest extent, controller switching equipment, surrounding environment and personal safety, for fast recovery of power supply provides advantage.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Fig. 1 is that the principle of the invention forms schematic diagram
Fig. 2 is the schematic diagram of the present invention in distribution system application
Embodiment
Fig. 2 is the schematic diagram of the present invention in distribution system application; all arc probe 3 are connected to arc optical signal modular converter M1-Mn; M1-Mn is connected with nonshared control unit 1 by connection optical fiber separately; the current sensor signal input nonshared control unit 1 of transformer inlet wire and mother position carries out analyzing and processing; the executive signal Trip1-Trip4 that nonshared control unit 1 is exported acts on respectively three ordinary tap groups (Trip1-Trip3) and a speed-sensitive switch (Trip4), and a set of arc light protecting device covers one section of bus.Once there is large arc fault within the scope of this cover arc light protecting device, speed-sensitive switch can guarantee that the loss that fault is caused drops to minimum at 10ms internal cutting off fault current.
According to specific exemplary embodiment, invention has been described herein, and to one skilled in the art, it will be apparent under not departing from the scope of the present invention, carrying out suitable replacement or revise.Exemplary embodiment is only illustrative, rather than restriction to scope of the present invention, and scope of the present invention is defined by appending claims.
Claims (4)
1. a Novel electric arc light protection system, is characterized in that it is made up of nonshared control unit (1), arc optical signal modular converter (2), arclight probe (3), current sensor (4), speed-sensitive switch (5), connection optical fiber (6) and ordinary tap group (7).All arc probe (3) are connected to the M1-Mn of arc optical signal modular converter (2); M1-Mn is connected with nonshared control unit (1) by connection optical fiber (6) separately; current sensor (4) the signal input nonshared control unit (1) of transformer inlet wire and mother position carries out analyzing and processing; the executive signal Trip1-Trip4 of nonshared control unit (1) output act on respectively three ordinary tap groups (7) (Trip1-Trip3) and a speed-sensitive switch (5) (Trip4), a set of arc light protecting device covers one section of bus.
2. Novel electric arc light protection system as claimed in claim 1; it is characterized in that described arc optical signal modular converter (2); adopting logical circuit to carry out exclusive disjunction therein can gather Multi-path electricity arc probe signal, and be converted to light signal by connect optical fiber (6) transmit to a distant place.
3. Novel electric arc light protection system as claimed in claim 1, is characterized in that arclight probe (3) adopts LX1972 or the photosensitive module of ON9658 within the scope of 0-50kLux, to make linear response to visible light illumination.
4. Novel electric arc light protection system as claimed in claim 1, is characterized in that described speed-sensitive switch (5) is for short circuit current limiter or Fast Speed Vacuum Circuit Breaker, and they can be controlled by nonshared control unit (1), cut-off fault current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320462235.3U CN203617679U (en) | 2012-11-08 | 2013-07-27 | Novel electric arc light protecting system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220600458 | 2012-11-08 | ||
| CN201220600458.7 | 2012-11-08 | ||
| CN201320462235.3U CN203617679U (en) | 2012-11-08 | 2013-07-27 | Novel electric arc light protecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617679U true CN203617679U (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320462235.3U Expired - Fee Related CN203617679U (en) | 2012-11-08 | 2013-07-27 | Novel electric arc light protecting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052158A (en) * | 2014-06-23 | 2014-09-17 | 南京南瑞继保电气有限公司 | Relay protection method and device for dead zone faults in switch cabinet |
| CN106849026A (en) * | 2017-03-30 | 2017-06-13 | 安徽徽电科技股份有限公司 | A kind of arc light protecting device and its guard method based on fast vacuum switch |
| CN108270205A (en) * | 2018-01-25 | 2018-07-10 | 北京海智元科技有限公司 | Arc light monitoring protection system based on pressure protection |
-
2013
- 2013-07-27 CN CN201320462235.3U patent/CN203617679U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052158A (en) * | 2014-06-23 | 2014-09-17 | 南京南瑞继保电气有限公司 | Relay protection method and device for dead zone faults in switch cabinet |
| CN106849026A (en) * | 2017-03-30 | 2017-06-13 | 安徽徽电科技股份有限公司 | A kind of arc light protecting device and its guard method based on fast vacuum switch |
| CN108270205A (en) * | 2018-01-25 | 2018-07-10 | 北京海智元科技有限公司 | Arc light monitoring protection system based on pressure protection |
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| 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: 20140528 |
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| CF01 | Termination of patent right due to non-payment of annual fee |