CN203014364U - Electrical protective device based on arc light detection - Google Patents
Electrical protective device based on arc light detection Download PDFInfo
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- CN203014364U CN203014364U CN 201320028986 CN201320028986U CN203014364U CN 203014364 U CN203014364 U CN 203014364U CN 201320028986 CN201320028986 CN 201320028986 CN 201320028986 U CN201320028986 U CN 201320028986U CN 203014364 U CN203014364 U CN 203014364U
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- arclight
- arc light
- feed line
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Abstract
The utility model discloses an electrical protective device based on the arc light detection. The electrical protective device comprises an arc light acquisition unit (1) used for acquiring arc light signals, a master control unit (2) used for outputting trip-out and alarm signals, and a feed line protection unit (3) used for controlling on-off states of a breaker, wherein the arc light acquisition unit (1) comprises at least one arc light sensor (11); an output terminal of the arc light sensor (11) is respectively connected with the master control unit (2) and the feed line protection unit (3); an output port of the master control unit (2) comprises two signal output ports, i.e., a trip-out output terminal (21) and an alarm output terminal (22); and an output terminal of the feed line protection unit (3) is provided with the breaker (21) used for controlling on-off states of a circuit of protected electrical equipment. The electrical protective device is capable of protecting the electrical equipment on the base of arc light and is advantaged by safety, reliability, wide application scope, simple structure, and low cost.
Description
Technical field
The utility model relates to the electric equipment field, is specifically related to a kind of electric protective device that detects based on arclight.
Background technology
In, when low-voltage bus bar is short-circuited fault, the arclight that produces can cause great injury to equipment and personnel, by the existing projects of relay protection standard of China, the bus of 35kV and following electric pressure is not generally installed bus protection.Yet, because the outlet on middle voltage bus bar is many, frequent operation, the distance of three-phase conductor wire spacing and the earth is closer, endangered by toy, the device fabrication quality is poorer than high-tension apparatus, apparatus insulated aging and mechanical wear, service conditions is abominable, and system's service conditions changes, the reasons such as artificial and operating mistake, the probability of failure of middle voltage bus bar is more much higher than high pressure, superhigh pressure bus.But for a long time, people pay little attention to the protection of middle voltage bus bar always, mostly adopt with the backup protection of larger time-delay and excise fault on bus, often make fault be developed, enlarge, thereby cause huge economic loss.
The inside switch cabinet arcing time of stipulating in IEC298 standard appendix A A is 100ms, and the switch cubicle of sale basically according to the IEC298 standard production, that is to say in the market, and the arcing time that switch cubicle can bear is 100ms.Owing to arc fault occuring before the circuit breaker action, failed shorted electric arc is to burn always, and namely operate time of protection adds breaker open operation time sum, is the duration of arc burning.That is to say, from the aspect consideration of protection switch cabinet, operate time of protection should cause larger harm to prevent that the arc short-circuit fault from further developing to enlarge less than 100ms excision fault.
According to statistics, the transformer of some regional 110kV and above grade suffers the short-circuit current impact directly to cause the accident of damaging, account for more than 50% of whole accidents, the fault that particularly forms during transformer low voltage side outlet (low-voltage bus bar) short circuit generally need to be changed winding, change possibly whole windings when serious, thereby cause very serious consequence and loss.The thermally-stabilised permission time of the 110kV of GB regulation and the transformer of above is 2 seconds, and be 0.25 second moving stabilization time.But in fact, at the low-pressure side outlet short circuit by operate time of overcurrent backup protection excision often more than 2 seconds, differ greatly from moving stabilization time of the transformer of 0.25 second.So, can say, the imperfection of relaying protection is also the major reason that causes transformer to damage.
In a single day arclight produces, and its extent of injury depends on arc current and mute time, energy and I2t exponentially rule fast rise that electric arc produces.Only excising fault in the short time at the utmost point just can make equipment do not done harm to.If total mute time is greater than 100ms, light equipment localized burn, heavy cause switch cubicle to explode and casualties, the chain accident that may cause " baked wheaten cake is operated " that has.So, in order to guarantee the safe operation of transformer and bus switchgear, according to the requirement of rapidity of relay protection, protect in the urgent need to the configure dedicated middle voltage bus bar.
Ginseng sees the above table, and the duration of arc burning is longer, and the extent of damage that equipment is caused is more serious.
As shown in Figure 1, arclight is in case produce, its extent of injury depends on arc current and mute time, energy and I2t exponentially rule fast rise that electric arc produces, the duration of arc burning is longer, arc energy is just higher, only excises fault at the utmost point in the short time equipment is not done harm to.If total mute time is greater than 100ms, light equipment localized burn, heavy cause switch cubicle to explode and casualties, the chain accident that may cause " baked wheaten cake is operated " that has.So, in order to guarantee the safe operation of transformer and bus switchgear, according to the requirement of rapidity of relay protection, protect in the urgent need to the configure dedicated middle voltage bus bar.
The utility model content
The technical problems to be solved in the utility model is to provide and a kind ofly can realizes the protection to electric equipment, safe and reliable, applied range, the electric protective device that detects based on arclight simple in structure, with low cost based on arclight.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
a kind of electric protective device that detects based on arclight, comprise for the arc light collecting unit that gathers arc optical signal, the main control unit that is used for output tripping operation and alarm signal, be used for controlling the protection for feed line unit of protected electric equipment connecting and disconnecting of the circuit, described arc light collecting unit comprises at least one arclight transducer, the output of described arclight transducer respectively with main control unit, the protection for feed line unit is connected, the output port of described main control unit comprises the tripping operation output, two signal output ports of warning output, the output of described protection for feed line unit is provided be used to the circuit breaker of controlling protected electric equipment connecting and disconnecting of the circuit, described main control unit is exported trip signal by the tripping operation output when the current increment that the output of arclight transducer detected reaches certain strength, when the arclight current output sensor being detected by the order of warning output output alarm, described protection for feed line unit is controlled circuit breaker and is disconnected when the arclight current output sensor being detected.
As further improvement in the technical proposal:
described main control unit comprises microprocessor, human-machine interface module, communication interface module, the built-in analog conversion module for gathering analog current signal of described microprocessor, described analog conversion module is connected with the arclight transducer, described human-machine interface module comprises button assembly and liquid crystal display screen assembly, described communication interface module comprises the RS232 interface, the RS485 interface, the CAN bus interface, at least a in Ethernet interface, described button assembly, the liquid crystal display screen assembly, communication interface module is connected with microprocessor respectively, described microprocessor respectively with the tripping operation output, the warning output is connected.
Described protection for feed line unit comprises switching circuit and amplification driving circuit, and the control end of described switching circuit is connected with the output of arclight transducer, and described switching circuit is connected with circuit breaker by amplification driving circuit.
The utlity model has following advantage:
Produce these characteristics of arc light when 1, the utility model breaks down by sense switch cabinet inside; in conjunction with this principle of overcurrent locking; according to the arclight signal that detects; (＜7ms protection action exports) can excise bus (and feeder line) fault within the extremely short time; support equipment and personal security; reduce loss, have that action fast and reliable, system configuration are simple, adaptable advantage.
2, the utility model is the solution that the at present ideal interior middle voltage bus bar of switch cubicle is protected, and can be widely used in the protection of the equipment such as feeder cable connector, box-type substation, rectifier cabinet simultaneously, has advantages of to have wide range of applications.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the relation between arcing time and arc energy.
Fig. 2 is the frame structure schematic diagram of the utility model embodiment.
Fig. 3 is the frame structure schematic diagram of main control unit in the utility model embodiment.
Fig. 4 is the processing logic principle schematic of main control unit in the utility model embodiment.
Fig. 5 is the frame structure schematic diagram of the protection for feed line unit in the utility model embodiment.
Marginal data:
1, arc light collecting unit; 11, arclight transducer;
2, main control unit; 21, tripping operation output; 22, warning output; 23, microprocessor; 231, analog conversion module; 24, human-machine interface module; 241, button assembly; 242, liquid crystal display screen assembly; 25, communication interface module;
3, protection for feed line unit; 31, circuit breaker; 32, switching circuit; 33, amplification driving circuit.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention are made more explicit defining.
as shown in Figure 2, the electric protective device that detects based on arclight of the present embodiment comprises for the arc light collecting unit 1 that gathers arc optical signal, the main control unit 2 that is used for output tripping operation and alarm signal, be used for controlling the protection for feed line unit 3 of protected electric equipment connecting and disconnecting of the circuit, arc light collecting unit 1 comprises at least one arclight transducer 11, the output of arclight transducer 11 respectively with main control unit 2, protection for feed line unit 3 is connected, the output port of main control unit 2 comprises tripping operation output 21, 22 two signal output ports of warning output, the output of protection for feed line unit 3 is provided be used to the circuit breaker 31 of controlling protected electric equipment connecting and disconnecting of the circuit, main control unit 2 is exported trip signals by tripping operation output 21 when the current increment that 11 outputs of arclight transducer detected reaches certain strength, when arclight transducer 11 output current being detected by the 22 output alarm orders of warning output, protection for feed line unit 3 is controlled circuit breaker 31 and is disconnected when arclight transducer 11 output current being detected.
In arc light collecting unit 1, the quantity of arclight transducer 11 specifically can be formulated as required.Arclight transducer 11 is ripe in the market product sensor, arclight transducer 11 is comprised of three parts: arc light detecting head, optical cable and optical-electrical converter, the arc light that produces when the arc light detecting head receives and to have an accident also filters visible light composition in arc light, accept the ultraviolet light of arc light and convert thereof into visible light, optical cable transmission is to optical-electrical converter, exports after being converted into the signal of telecommunication.
as shown in Figure 3, the main control unit 2 of the present embodiment comprises microprocessor 23, human-machine interface module 24, communication interface module 25, the built-in analog conversion module 231 for gathering analog current signal of microprocessor 23, analog conversion module 231 is connected with arclight transducer 11, human-machine interface module 24 comprises button assembly 241 and liquid crystal display screen assembly 242, communication interface module 25 comprises the RS232 interface, the RS485 interface, the CAN bus interface, at least a in Ethernet interface, button assembly 241, liquid crystal display screen assembly 242, communication interface module 25 is connected with microprocessor 23 respectively, microprocessor 23 respectively with the tripping operation output 21, warning output 22 is connected.
As shown in Figure 4, the processing logic of microprocessor 23 is as follows: 1) at least one arclight transducer 11 receive arc light (being that output current is greater than 0) and at least one arclight transducer 11 output current signal greater than certain strength, by tripping operation output 21 output trip signals; 2) any one arclight transducer 11 receive arc light (being that output current is greater than 0) or any one arclight transducer 11 output current signal greater than certain strength, by warning output 22 output alarm signals.In figure, " 〉=1 " is or logic, represents that any one initial conditions satisfies can carry out backward; “ ﹠amp; " be and logic to represent that all initial conditions all must satisfy just can carry out backward.
As shown in Figure 5, the protection for feed line unit 3 of the present embodiment comprises switching circuit 32 and amplification driving circuit 33, and the control end of switching circuit 32 is connected with the output of arclight transducer 11, and switching circuit 32 is connected with circuit breaker 31 by amplification driving circuit 33.In the present embodiment, switching circuit 32 adopts transistor to realize, amplification driving circuit 33 adopts operational amplification circuit to realize.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is not limited in above-mentioned execution mode, and every technical scheme that belongs to the utility model principle all belongs to protection range of the present utility model.For a person skilled in the art, some improvements and modifications of carrying out under the prerequisite that does not break away from principle of the present utility model, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (3)
1. electric protective device that detects based on arclight, it is characterized in that: comprise for the arc light collecting unit (1) that gathers arc optical signal, the main control unit (2) that is used for output tripping operation and alarm signal, be used for controlling the protection for feed line unit (3) of protected electric equipment connecting and disconnecting of the circuit, described arc light collecting unit (1) comprises at least one arclight transducer (11), the output of described arclight transducer (11) respectively with main control unit (2), protection for feed line unit (3) is connected, the output port of described main control unit (2) comprises tripping operation output (21), (22) two signal output ports of warning output, the output of described protection for feed line unit (3) is provided be used to the circuit breaker of controlling protected electric equipment connecting and disconnecting of the circuit (31), described main control unit (2) is exported trip signal by tripping operation output (21) when the current increment that arclight transducer (11) output detected reaches certain strength, when arclight transducer (11) output current being detected by warning output (22) output alarm order, described protection for feed line unit (3) is controlled circuit breaker (31) and is disconnected when arclight transducer (11) output current being detected.
2. the electric protective device that detects based on arclight according to claim 1, it is characterized in that: described main control unit (2) comprises microprocessor (23), human-machine interface module (24), communication interface module (25), the built-in analog conversion module (231) for gathering analog current signal of described microprocessor (23), described analog conversion module (231) is connected with arclight transducer (11), described human-machine interface module (24) comprises button assembly (241) and liquid crystal display screen assembly (242), described communication interface module (25) comprises the RS232 interface, the RS485 interface, the CAN bus interface, at least a in Ethernet interface, described button assembly (241), liquid crystal display screen assembly (242), communication interface module (25) is connected with microprocessor (23) respectively, described microprocessor (23) respectively with the tripping operation output (21), warning output (22) is connected.
3. the electric protective device that detects based on arclight according to claim 2; it is characterized in that: described protection for feed line unit (3) comprises switching circuit (32) and amplification driving circuit (33); the control end of described switching circuit (32) is connected with the output of arclight transducer (11), and described switching circuit (32) is connected with circuit breaker (31) by amplification driving circuit (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028986 CN203014364U (en) | 2013-01-06 | 2013-01-06 | Electrical protective device based on arc light detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028986 CN203014364U (en) | 2013-01-06 | 2013-01-06 | Electrical protective device based on arc light detection |
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| Publication Number | Publication Date |
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| CN203014364U true CN203014364U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320028986 Expired - Fee Related CN203014364U (en) | 2013-01-06 | 2013-01-06 | Electrical protective device based on arc light detection |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618295A (en) * | 2013-11-29 | 2014-03-05 | 国家电网公司 | Photoelectric type arc light protecting system |
| CN103618294A (en) * | 2013-11-22 | 2014-03-05 | 安徽昌南电气科技有限公司 | Arc light control color screen |
| CN103618284A (en) * | 2013-11-22 | 2014-03-05 | 安徽昌南电气科技有限公司 | Low-voltage arc-light quick-acting switching-off control device |
| CN103854913A (en) * | 2013-09-05 | 2014-06-11 | 上海华明电力设备制造有限公司 | Isolation switch arc detection mechanism and safety protection device for vacuum on-load tapping switch |
| CN104476028A (en) * | 2014-11-19 | 2015-04-01 | 柳州市国辉汽车零部件有限公司 | Automatic arc light stopping device |
| WO2020015277A1 (en) * | 2018-07-20 | 2020-01-23 | 国电南瑞科技股份有限公司 | Arc light fault identifying device and method based on panoramic information |
-
2013
- 2013-01-06 CN CN 201320028986 patent/CN203014364U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854913A (en) * | 2013-09-05 | 2014-06-11 | 上海华明电力设备制造有限公司 | Isolation switch arc detection mechanism and safety protection device for vacuum on-load tapping switch |
| CN103618294A (en) * | 2013-11-22 | 2014-03-05 | 安徽昌南电气科技有限公司 | Arc light control color screen |
| CN103618284A (en) * | 2013-11-22 | 2014-03-05 | 安徽昌南电气科技有限公司 | Low-voltage arc-light quick-acting switching-off control device |
| CN103618295A (en) * | 2013-11-29 | 2014-03-05 | 国家电网公司 | Photoelectric type arc light protecting system |
| CN104476028A (en) * | 2014-11-19 | 2015-04-01 | 柳州市国辉汽车零部件有限公司 | Automatic arc light stopping device |
| CN104476028B (en) * | 2014-11-19 | 2016-06-01 | 柳州市国辉汽车零部件有限公司 | The automatic retention device of arc light |
| WO2020015277A1 (en) * | 2018-07-20 | 2020-01-23 | 国电南瑞科技股份有限公司 | Arc light fault identifying device and method based on panoramic information |
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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: 20130619 Termination date: 20160106 |