CN104836212A - Arc light protection system suitable for double-power supply - Google Patents
Arc light protection system suitable for double-power supply Download PDFInfo
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- CN104836212A CN104836212A CN201510044302.3A CN201510044302A CN104836212A CN 104836212 A CN104836212 A CN 104836212A CN 201510044302 A CN201510044302 A CN 201510044302A CN 104836212 A CN104836212 A CN 104836212A
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- arc light
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- circuit breaker
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Abstract
The invention discloses an arc light protection system suitable for double-power supply. The arc light protection system comprises a first power supply and a second power supply; a first wire inlet circuit breaker, a second wire inlet circuit breaker, a first wire outlet circuit breaker, and a second wire outlet circuit breaker, which are respectively connected with the first power supply and the second power supply; a section circuit breaker, a current acquisition unit, an arc light acquisition unit, switch cabinets, and arc light sensors. The arc light sensors of the two switch cabinets are respectively connected with the arc light acquisition unit, which is connected with an arc light protection main unit by a special optical fiber. The current acquisition unit is connected with the arc light protection main unit by the special optical fiber. In the double-power supply system, any of the power supplies can be used, and then the arc light trip protection can be realized, the circuit breaker failure protection can be realized, and the low voltage switch cabinet is capable of disconnecting the faulted line quickly, accurately, and selectively during the occurrence of the arc light faults, and therefore the lasting time of the faulted electric arc can be limited fundamentally, and the damages caused by the arc light can be eliminated.
Description
Technical field
The present invention relates to arc light protecting system field, specifically a kind of arc light protecting system being applicable to duplicate supply.
Background technology
According to GB/T 14285-2006 " relaying protection and automatic safety device technical regulation ", below 35kV electric power system does not install bus protection, and the general overcurrent protection that adopts is protected in support.But due to the outlet on middle voltage bus bar more, frequent operation, the reasons such as three-phase conductor wire spacing is closer with the distance of the earth, apparatus insulated aging and mechanical wear, the fault of middle voltage bus bar increases thereupon.The development of modern power systems, the increase gradually of power distribution network capacity, the impact of middle pressure busbar fault on safe operation of power system is more and more serious.It not only makes Medium Voltage Switchgear seriously burn, and cause the accident expansion, and may burn expensive transformer, causes serious economic loss.If these accidents are dealt with improperly develop into distribution network failure, by the safe operation of entail dangers to whole system.Therefore, necessary introducing at intermediate distribution system is applicable to pressing bus protection to excise busbar fault fast in its fault mode, ensures the safe operation of system and equipment.Along with the development of modern microcomputer and electronic technology, various new bus protection principle and device constantly occur, provide various solution for realizing special middle pressure bus protection.Arc protection is as a kind of protective device for middle voltage bus bar developed for middle-low voltage switch cabinet fault characteristic and feature; have that principle is simple, reliable in action is rapid; to transforming plant primary equipment without particular/special requirement; be suitable for various operational mode; and under various operational mode, protect advantages such as not needing switching, for user provide one desirable in, low-voltage bus bar protection scheme.Can say that succeeding in developing of electric arc protection has annotated rapidity of relay protection implication, imparts the content that relay protection field is new, innovate Principles of Relay Protection technology, improved relaying protection performance factor.In recent years, in more American-European countries, increasing user adopts electric arc protection as the protection of middle-low voltage switch cabinet internal fault, and in some these protective devices of country become, the standard configuration of low-tension switch cabinet.External application experiment shows; arc light protection system except alleviate to greatest extent switchgear damaged condition and for except neighbouring staff provides personnel protection; also can greatly reduce the interruption duration that internal faults of switch cabinet causes, thus concerning its application user, also there is very large economic benefit.
As shown in Figure 1, be the damaged condition caused equipment under the various arcing times that data both domestic and external is introduced, 85ms: do not destroy significantly, generally can come into operation after inspection insulation.100ms: cable insulation weak spot takes fire, and damages system.200ms: bus takes fire, damages comparatively serious.500ms: device damage is very serious, and on-the-spot personnel may be subject to serious injury.
summary of the inventionthe object of this invention is to provide a kind of arc light protecting system being applicable to duplicate supply, the situation that time for current domestic breaking arc fault longer, fault coverage expands, simultaneously arc light protecting system in the market is not all suitable for the application scenario of duplicate supply, provides a kind of arc light protecting system being applicable to duplicate supply; To solve in double power-supply system, within the very first time of arbitrary bus generation arc fault, excise the fault of bus and inside switch cabinet, avoid further expansion, proterctive equipment and the personal safety of fault.
In order to achieve the above object, the technical solution adopted in the present invention is:
Be applicable to an arc light protecting system for duplicate supply, it is characterized in that: comprise the first power supply, second source, the first power supply is successively by the first lead-in circuit breaker, first transformer, first current sensor, first wire-outgoing breaker is connected with bus I and bus II respectively, and second source is successively by the second lead-in circuit breaker, second transformer, second current sensor, second wire-outgoing breaker is connected with bus I and bus II respectively, is connected with first isolating switch of mutually connecting between bus I with bus II, section breaker, 3rd current sensor, second isolating switch, the first current sensor, second current sensor, 3rd current sensor accesses a current acquisition unit respectively, described current acquisition unit to be connected with an arc protection master unit by special optic fibre and to transmit over-current signal, and current acquisition unit is connected with the communication of arc protection master unit by monomode fiber, described first lead-in circuit breaker, first wire-outgoing breaker, second lead-in circuit breaker, second wire-outgoing breaker, section breaker also accesses arc protection master unit respectively, bus I, bus II connects two groups of switch cubicles jointly, often organize in switch cubicle and be respectively arranged with multiple arc photosensor, arc photosensor in two groups of switch cubicles accesses the arc light collecting unit that is connected with arc light tripping operation outlet respectively, and described arc light collecting unit is connected with the communication of arc protection master unit by monomode fiber.
Described a kind of arc light protecting system being applicable to duplicate supply, it is characterized in that: the first power supply successively by after the first lead-in circuit breaker, the first transformer, the first current sensor, the first wire-outgoing breaker, then is connected with bus I respectively by the 4th isolating switch, the 3rd isolating switch is connected with bus II;
Second source successively by after the second lead-in circuit breaker, the second transformer, the second current sensor, the second wire-outgoing breaker, then is connected with bus I respectively by the 6th isolating switch, the 5th isolating switch is connected with bus II.
Described a kind of arc light protecting system being applicable to duplicate supply, it is characterized in that: the node that bus I is connected with the 4th isolating switch is connected with the 8th isolating switch, the node that bus II is connected with the 3rd isolating switch is connected with the 7th isolating switch, is connected with wherein one group of switch cubicle by the 9th isolating switch after the 7th isolating switch, the 8th isolating switch connect altogether again;
The node that bus I is connected with the 6th isolating switch is connected with the 11 isolating switch, the node that bus II is connected with the 5th isolating switch is connected with the tenth isolating switch, and the tenth isolating switch, the 11 isolating switch are organized switch cubicle by the 12 isolating switch and another after connecing altogether and are connected.
Described a kind of arc light protecting system being applicable to duplicate supply, is characterized in that: described current sensor all adopts the current mode current transformer of 2mA/2mA.
Described a kind of arc light protecting system being applicable to duplicate supply, is characterized in that: described arc photosensor includes arc light detecting probe, and arc photosensor is better in 300nm ~ 1500nm response characteristic to wavelength.
Described a kind of arc light protecting system being applicable to duplicate supply, is characterized in that: often organize in switch cubicle and at least install 2 arc light detecting probes.
Described a kind of arc light protecting system being applicable to duplicate supply; it is characterized in that: between arc protection master unit and current acquisition unit and arc light collecting unit, adopt special optical fiber to transmit over-current signal and arc optical signal, adopt monomode fiber to realize communication between arc protection master unit and current acquisition unit and arc light collecting unit.
The invention has the beneficial effects as follows:
In double power-supply system, the present invention can ensure that middle-low voltage switch cabinet is quick, accurate selectively open failure circuit, the fundamentally duration of fault restriction electric arc at generation arc fault, eliminates the harm that arc light causes, avoid the expansion of fault, ensure equipment and personal safety.
Accompanying drawing explanation
Fig. 1 is the damaged condition schematic diagram caused equipment under the prior art various arcing time.
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
Shown in Figure 1, a kind of arc light protecting system being applicable to duplicate supply, comprises the first power supply W1, second source W2, the first power supply W1 are successively by the first lead-in circuit breaker 2, first transformer 3, first current sensor 4, first wire-outgoing breaker 5 is connected with bus I and bus II respectively, and second source W2 is successively by the second lead-in circuit breaker 19, second transformer 20, second current sensor 21, second wire-outgoing breaker 22 is connected with bus I and bus II respectively, is connected with first isolating switch 15 of mutually connecting between bus I with bus II, section breaker 16, 3rd current sensor 17, second isolating switch 18, first current sensor 4, second current sensor 21, 3rd current sensor 17 accesses a current acquisition unit 12 respectively, described current acquisition unit 12 is connected with an arc protection master unit 11 by special optic fibre 29 and transmits over-current signal, and current acquisition unit 12 is connected with arc protection master unit 11 communication by monomode fiber 30, the first lead-in circuit breaker 2, first wire-outgoing breaker 5, second lead-in circuit breaker 19, second wire-outgoing breaker 22, section breaker 16 also accesses arc protection master unit 11, bus I respectively, bus II connects two groups of switch cubicles jointly, often organize in switch cubicle 32 and be respectively arranged with multiple arc photosensor 1, arc photosensor 1 in two groups of switch cubicles accesses the arc light collecting unit 13 that is connected with arc light tripping operation outlet 14 respectively, and arc light collecting unit 13 is connected with arc protection master unit 11 communication by monomode fiber 31.
First power supply W1 successively by after the first lead-in circuit breaker 2, first transformer 3, first current sensor 4, first wire-outgoing breaker 5, then is connected with bus I respectively by the 4th isolating switch 7, the 3rd isolating switch 6 is connected with bus II;
Second source W2 successively by after the second lead-in circuit breaker 19, second transformer 20, second current sensor 21, second wire-outgoing breaker 22, then is connected with bus I respectively by the 6th isolating switch 24, the 5th isolating switch 23 is connected with bus II.
The node that bus I is connected with the 4th isolating switch 7 is connected with the 8th isolating switch 9, the node that bus II is connected with the 3rd isolating switch 6 is connected with the 7th isolating switch the 8, seven isolating switch 8, the 8th isolating switch 9 is connected with wherein one group of switch cubicle by the 9th isolating switch 10 after connecing altogether again;
The node that bus I is connected with the 6th isolating switch 24 is connected with the 11 isolating switch 26, the node that bus II is connected with the 5th isolating switch 23 is connected with and organizes switch cubicle by the 12 isolating switch 27 and another after the tenth isolating switch the 25, ten isolating switch the 25, the 11 isolating switch 26 connects altogether and be connected.
Current sensor all adopts the current mode current transformer of 2mA/2mA.
Arc photosensor includes arc light detecting probe, and arc photosensor is better in 300nm ~ 1500nm response characteristic to wavelength.
Often organize in switch cubicle and 2 arc light detecting probes are at least installed.
Adopt special optical fiber to transmit over-current signal and arc optical signal between arc protection master unit and current acquisition unit and arc light collecting unit, adopt monomode fiber to realize communication between arc protection master unit and current acquisition unit and arc light collecting unit.
Operation principle of the present invention is:
The arc light detected is transferred to arc light collecting unit 13 by special optic fibre 33 by the arc photosensor 1 in switch cubicle 32; arc light collecting unit 13 selects arc light tripping operation outlet 14 according to the arc light collected, and arc optical signal is transferred to arc protection master unit 11 by special optic fibre 28 simultaneously.Arc protection master unit 11 gathers arc optical signal; current acquisition unit 12 transmits the over-current signal of coming; the contact point signal of the first lead-in circuit breaker 2; the contact point signal of the second lead-in circuit breaker 19; first wire-outgoing breaker 5 connect signal; the contact point signal of the second wire-outgoing breaker 22; the contact point signal of section breaker 16; arc protection master unit 11 exports trip signal to the first wire-outgoing breaker 5 according to control logic; second wire-outgoing breaker 22; first lead-in circuit breaker 2, second lead-in circuit breaker 19 and section breaker 16.
The present invention is intended to solve in the system of duplicate supply; the fault of bus and inside switch cabinet is excised within the very first time of arbitrary bus generation arc fault; excision faulty line that can be selectively real-time; avoid tripping and malfunction; prevent failure propagation; the problems such as device damage, improve the reliability of power supply to a certain extent, protect equipment and personal safety.
Claims (7)
1. be applicable to an arc light protecting system for duplicate supply, it is characterized in that: comprise the first power supply, second source, the first power supply is successively by the first lead-in circuit breaker, first transformer, first current sensor, first wire-outgoing breaker is connected with bus I and bus II respectively, and second source is successively by the second lead-in circuit breaker, second transformer, second current sensor, second wire-outgoing breaker is connected with bus I and bus II respectively, is connected with first isolating switch of mutually connecting between bus I with bus II, section breaker, 3rd current sensor, second isolating switch, the first current sensor, second current sensor, 3rd current sensor accesses a current acquisition unit respectively, described current acquisition unit to be connected with an arc protection master unit by special optic fibre and to transmit over-current signal, and current acquisition unit is connected with the communication of arc protection master unit by monomode fiber, described first lead-in circuit breaker, first wire-outgoing breaker, second lead-in circuit breaker, second wire-outgoing breaker, section breaker also accesses arc protection master unit respectively, bus I, bus II connects two groups of switch cubicles jointly, often organize in switch cubicle and be respectively arranged with multiple arc photosensor, arc photosensor in two groups of switch cubicles accesses the arc light collecting unit that is connected with arc light tripping operation outlet respectively, and described arc light collecting unit is connected with the communication of arc protection master unit by monomode fiber.
2. a kind of arc light protecting system being applicable to duplicate supply according to claim 1, it is characterized in that: the first power supply successively by after the first lead-in circuit breaker, the first transformer, the first current sensor, the first wire-outgoing breaker, then is connected with bus I respectively by the 4th isolating switch, the 3rd isolating switch is connected with bus II;
Second source successively by after the second lead-in circuit breaker, the second transformer, the second current sensor, the second wire-outgoing breaker, then is connected with bus I respectively by the 6th isolating switch, the 5th isolating switch is connected with bus II.
3. a kind of arc light protecting system being applicable to duplicate supply according to claim 1, it is characterized in that: the node that bus I is connected with the 4th isolating switch is connected with the 8th isolating switch, the node that bus II is connected with the 3rd isolating switch is connected with the 7th isolating switch, is connected with wherein one group of switch cubicle by the 9th isolating switch after the 7th isolating switch, the 8th isolating switch connect altogether again;
The node that bus I is connected with the 6th isolating switch is connected with the 11 isolating switch, the node that bus II is connected with the 5th isolating switch is connected with the tenth isolating switch, and the tenth isolating switch, the 11 isolating switch are organized switch cubicle by the 12 isolating switch and another after connecing altogether and are connected.
4. a kind of arc light protecting system being applicable to duplicate supply according to claim 1, is characterized in that: described current sensor all adopts the current mode current transformer of 2mA/2mA.
5. a kind of arc light protecting system being applicable to duplicate supply according to claim 1, is characterized in that: described arc photosensor includes arc light detecting probe, and arc photosensor is better in 300nm ~ 1500nm response characteristic to wavelength.
6. a kind of arc light protecting system being applicable to duplicate supply according to claim 1, is characterized in that: often organize in switch cubicle and at least install 2 arc light detecting probes.
7. a kind of arc light protecting system being applicable to duplicate supply according to claim 1; it is characterized in that: between arc protection master unit and current acquisition unit and arc light collecting unit, adopt special optical fiber to transmit over-current signal and arc optical signal, adopt monomode fiber to realize communication between arc protection master unit and current acquisition unit and arc light collecting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044302.3A CN104836212A (en) | 2015-01-28 | 2015-01-28 | Arc light protection system suitable for double-power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044302.3A CN104836212A (en) | 2015-01-28 | 2015-01-28 | Arc light protection system suitable for double-power supply |
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| CN104836212A true CN104836212A (en) | 2015-08-12 |
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| CN201510044302.3A Pending CN104836212A (en) | 2015-01-28 | 2015-01-28 | Arc light protection system suitable for double-power supply |
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Cited By (3)
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| CN105071354A (en) * | 2015-09-25 | 2015-11-18 | 成都工百利自动化设备有限公司 | Arc light protection monitoring method based on NFC (Near Field Communication) |
| CN108667021A (en) * | 2018-08-02 | 2018-10-16 | 南方电网科学研究院有限责任公司 | Wiring system based on regular graph |
| CN112688282A (en) * | 2020-11-19 | 2021-04-20 | 嘉兴恒创电力设计研究院有限公司 | Arc flash hazard calculation method, arc flash hazard reduction method and fault detection method |
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| CN105071354A (en) * | 2015-09-25 | 2015-11-18 | 成都工百利自动化设备有限公司 | Arc light protection monitoring method based on NFC (Near Field Communication) |
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| CN112688282A (en) * | 2020-11-19 | 2021-04-20 | 嘉兴恒创电力设计研究院有限公司 | Arc flash hazard calculation method, arc flash hazard reduction method and fault detection method |
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Application publication date: 20150812 |
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