CN202167840U - Arclight integrated protection system in middle and low voltage switch cabinet - Google Patents
Arclight integrated protection system in middle and low voltage switch cabinet Download PDFInfo
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- CN202167840U CN202167840U CN2011202876271U CN201120287627U CN202167840U CN 202167840 U CN202167840 U CN 202167840U CN 2011202876271 U CN2011202876271 U CN 2011202876271U CN 201120287627 U CN201120287627 U CN 201120287627U CN 202167840 U CN202167840 U CN 202167840U
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- arclight
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- master controller
- protection system
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Abstract
The utility model discloses an arclight integrated protection system in a middle and low voltage switch cabinet, which is used in the 6-35kV power grid, and comprises a master controller and a plurality of slave controller, wherein the main controller is arranged inside an incoming line cabinet, the salve controller are respectively arranged in respective outgoing line cabinet, the master controller and the slave controllers form a master-slave structure, the master controller is communicated with the slave controllers by using fibers, the master controller is provided with a 485 communication serial port for communicating with a remote computer, and the master controller and the slave controllers are respectively provided with a current transducer CT, an arc light transducer OT and a sound wave transducer ST, which are connected with the master controller and the salve controllers. The arclight integrated protection system in a middle and low voltage switch cabinet can rapidly analyze and determine the fault types, and can trip out and cut off the power grid power supply of the breaker, thereby preventing arclight from generation.
Description
Technical field
The utility model relates to the protective device in a kind of electrical network, is specifically related to arclight Integrated Protection System in a kind of mesolow switch cubicle.
Background technology
In the 6-35KV electric power system, various types of switch cubicles are aging because of the insulation of electrical installation layer, and a variety of causes such as bad weather cause air generation ionization in the switch cubicle, and temperature sharply rises, and produce arclight then and cause busbar fault such as line to line fault.As long as system do not cut off the power supply, arc light exists always and with the speed outburst of 300 meters of per seconds, destroys any material in the way.Can cause switch cubicle blast when the arclight energy is enough, thereby and produce chain reaction and cause whole electric power system paralysis.
Existing electric arc light protection method is taked the fastest speed disengagement failure power supply exactly.But how accurately fast judge arclight, cut off the electricity supply that this all is to be badly in need of the technical problem that solves how to protect arclight produces in a whole set of electric power system prevention switch cubicle harm like how the fastest speed.The existing protection of arclight on the market product is many; But the analysis and judgement to arclight is inaccurate; Only depend on overcurrent and light intensity analysis to judge arclight, this method is easy to cause local the power failure because of reasons such as human factor cause the control device erroneous judgement, and for example the switch cubicle door opens; The irradiation of light, switch combined floodgate etc. can both cause the erroneous judgement of arclight.Adopt luminous intensity and electric current for example to judge arclight: Chinese patent: CN200920295015.X; And Chinese patent: CN201020111046.8 etc., all more single problem that can not solve the accuracy of judgement of arclight of above-mentioned judgement to arclight.And a lot of products and patent are (for example: Chinese patent: CN201020213776.9) can only protect single switch cubicle, can not effectively protect whole electric power system.Present many arclight protective devices also are furnished with quick 1MS trip signal output, but switch is of a great variety in the electric power system, and effective control switch interface can not be provided.
Summary of the invention
To the problem that exists in the above-mentioned prior art; The purpose of the utility model is to provide arclight Integrated Protection System in a kind of mesolow switch cubicle; It can take comprehensive analysis and judgement to arclight; And be equipped with multiple output trip signal interface, thereby power equipment and operating personnel's personal safety have been protected better.
The utility model is the technical scheme that its purpose of realization is taked; Arclight Integrated Protection System in the mesolow switch cubicle comprises master controller and several slave controllers, and said master controller places in the incoming line cabinet, and said slave controller places separately in the outlet cabinet, and master controller is put the formation primary and secondary structure with each slave controller; The communication interface of establishing master and slave controller realizes communication therebetween; Said master controller is established 485 communication serial ports, communicates by letter with remote computer terminal; Master and slave controller is equipped with current sensor CT, arc photosensor OT and the sonic sensor ST that is attached thereto.
It is the arc photosensor of PN11528 that said arc photosensor OT adopts model.
Said master and slave controller is respectively equipped with optical fiber interface, electric pulse interface and relay interface.
The operation principle of the utility model: when having arclight to produce in the switch cubicle; The signal that controller collects current sensor CT surpasses setting value; The signal of arc photosensor OT surpasses setting value; The signal of sonic sensor ST also surpasses setting value, three kinds of signals be with relation when promptly satisfying condition simultaneously, controller is taked corresponding actions.The high-order electric brake action of master controller may command, the action of slave controller control low level electric brake.
The beneficial effect of the utility model:The harm that the arclight that can effectively prevent to produce in the switch cubicle in the 6-35kv electric power system causes power equipment and operating personnel, safe operation plays a good protection to power system stability.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the sonic sensor ST electrical block diagram of the utility model;
Fig. 3 a-c is the utility model controller output principle figure.
Embodiment
Referring to Fig. 1, the utility model is useful in the 6-36KV electric power system, and the utility model comprises that master controller 2, the first slave controller 4-1 and the second slave controller 4-2 (also can establish the 3rd, the 4th slave controller according to actual needs ...).Master controller 2 places in the incoming line cabinet 3, and slave controller places separately in the outlet cabinet 5-1, and master controller 2 is put the formation primary and secondary structure with each slave controller.The communication interface of establishing master and slave controller realizes communication therebetween, as adopting optical fiber 7 communications between the master and slave controller; Also can establish the electric pulse interface, by Q1, the metal-oxide-semiconductor output circuit that Q2 constitutes can insert behind the pulse transformer the directly switch of control SCR.Master controller 2 is established 485 communication serial ports 8 and is communicated by letter with remote computer terminal 1, realizes remote monitoring.Master and slave controller is equipped with current sensor CT, arc photosensor OT and the sonic sensor ST that is attached thereto.Wherein current sensor CT is built among the bus-bar room 6-1; Arc photosensor OT is built among the breaker chamber 6-2; Sonic sensor ST is built among the 6-3 of cable vault (only represented being connected of one of them slave controller and three kinds of transducers among Fig. 1, all the other are because of the identical omission of structure).It is the arc photosensor of PN11528 that arc photosensor OT adopts model.Master and slave controller is respectively equipped with optical fiber interface, electric pulse interface and relay interface.
The arclight analysis and judgement is main, and arc photosensor OT captures forceful electric power light according to being the signal overcurrent of current sensor CT, and sonic sensor ST captures ultrasonic wave.Take comprehensive judgment mode on the judgment mode to arclight, when arclight took place, the fault phase current reached under the normal condition more than the several times, and air ionization produces dazzling arc light and ear-piercing high frequency sound wave.Controller from above condition as basis for estimation, sensor acquisition to data carry out corresponding action again after delivering to the central processor comprehensive analysis and judgement.
Fig. 2 is sonic sensor ST circuit theory diagrams, and the identifier Y1 of the last institute of figure is a piezoelectric ceramic, the two-stage amplifying circuit that circuit mainly is made up of amplifier OP37, the second order bandwidth-limited circuit that is made up of amplifier TL082.The frequency of sound wave that produces because of arclight is high, and the signal that imports into is more weak, is the millivolt level, therefore designs two-stage and amplifies, and amplifies about 5000 times altogether.Consider in complex operating environment, disturb, designed the high accuracy bandwidth-limited circuit that constitutes by amplifier TL082, the signal after amplifying is carried out filtering, transfer to the AD sampling then in order to prevent sound waves of different frequencies.
Fig. 3 a-c is the multiple output interface mode and the circuit diagram of controller.Wherein:
Fig. 3 a is an optical fiber interface, and controller output signal through optical signal transmission fiber, can insert light-operated switch, light activated power thyristor etc. through fiber optic emitter.
Fig. 3 b is the electric pulse interface, and by Q1, the metal-oxide-semiconductor output circuit that Q2 constitutes can insert behind the pulse transformer the directly switch of control SCR.
Fig. 3 c is a relay interface, can directly control circuit breaker etc.
Take comprehensive judgment mode on the judgment mode of the utility model to arclight, when arclight took place, the fault phase current reached under the normal condition more than the several times, and air ionization produces dazzling arc light and ear-piercing high frequency sound wave.Controller from above condition as basis for estimation, sensor acquisition to data carry out corresponding action again after delivering to the central processor comprehensive analysis and judgement.Factor such as excessive or miscellaneous equipment fault causes can not the tripping circuit breaker time because of electric current when slave controller; Can send signal to master controller through optical fiber; Master controller tripping service entrance switch cabinet breaker, thus the safe operation of outlet switch cubicle and whole system protected.Master controller is not only through communication between optical fiber and each slave controller, and employing standard industry 485 interfaces can be communicated by letter the realization Long-distance Control with remote computer terminal.The utility model is a whole set of electric power system switch cubicle protection scheme; Not only effectively novel to the judgment mode of arclight in the cabinet that opens the light, and system's stable and reliable operation, can be widely used in the mesolow electric power system; The accident that the prevention arclight causes takes place, and the protection power grid security normally moves.
Claims (4)
1. arclight Integrated Protection System in the mesolow switch cubicle; It is characterized in that: this system comprises master controller and several slave controllers; Said master controller places in the incoming line cabinet, and said slave controller places separately in the outlet cabinet, and master controller is put the formation primary and secondary structure with each slave controller; The communication interface of establishing master and slave controller realizes communication therebetween; Said master controller is also established 485 communication serial ports, communicates by letter with remote computer terminal; Master and slave controller is equipped with current sensor CT, arc photosensor OT and the sonic sensor ST that is attached thereto.
2. arclight Integrated Protection System in the mesolow switch cubicle according to claim 1 is characterized in that: it is the arc photosensor of PN11528 that said arc photosensor OT adopts model.
3. arclight Integrated Protection System in the mesolow switch cubicle according to claim 1; It is characterized in that: the two-stage amplifying circuit that the circuit of said sonic sensor ST is made up of integrated operational amplifier chip OP37; The second order bandwidth-limited circuit that is made up of integrated operational amplifier chip TL082 constitutes; Said second order bandwidth-limited circuit carries out filtering to the signal after amplifying, and transfers to the AD sampling then.
4. arclight Integrated Protection System in the mesolow switch cubicle according to claim 1, it is characterized in that: said master and slave controller is respectively equipped with optical fiber interface, electric pulse interface and relay interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202876271U CN202167840U (en) | 2011-08-10 | 2011-08-10 | Arclight integrated protection system in middle and low voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202876271U CN202167840U (en) | 2011-08-10 | 2011-08-10 | Arclight integrated protection system in middle and low voltage switch cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN202167840U true CN202167840U (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202876271U Expired - Lifetime CN202167840U (en) | 2011-08-10 | 2011-08-10 | Arclight integrated protection system in middle and low voltage switch cabinet |
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| CN (1) | CN202167840U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280863A (en) * | 2011-08-10 | 2011-12-14 | 安徽徽电科技股份有限公司 | Arc light integrated protection system in medium and low voltage switch cabinet |
-
2011
- 2011-08-10 CN CN2011202876271U patent/CN202167840U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280863A (en) * | 2011-08-10 | 2011-12-14 | 安徽徽电科技股份有限公司 | Arc light integrated protection system in medium and low voltage switch cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Arc light integrated protection system in medium and low voltage switch cabinet Effective date of registration: 20160629 Granted publication date: 20120314 Pledgee: Hefei high tech Company limited by guarantee Pledgor: Anhui Huidian Technology Co., Ltd. Registration number: 2016340000032 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170619 Granted publication date: 20120314 Pledgee: Hefei high tech Company limited by guarantee Pledgor: Anhui Huidian Technology Co., Ltd. Registration number: 2016340000032 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120314 |
|
| CX01 | Expiry of patent term |