CN101505053A - User demarcation circuit breaker set apparatus and protection method - Google Patents
User demarcation circuit breaker set apparatus and protection method Download PDFInfo
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- CN101505053A CN101505053A CNA2008100300477A CN200810030047A CN101505053A CN 101505053 A CN101505053 A CN 101505053A CN A2008100300477 A CNA2008100300477 A CN A2008100300477A CN 200810030047 A CN200810030047 A CN 200810030047A CN 101505053 A CN101505053 A CN 101505053A
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Abstract
The invention discloses a protection method capable of automatically and directly cutting off earthing or short circuit failures of a user terminal, quickly recovering constant failed power supply of the user terminal, and carrying out real-time monitoring and in-situ protection on a circuit by configuring communication equipment, and a user boundary breaker complete device matched with the same. The user boundary breaker complete device comprises a breaker body (1), an outdoor power supply transformer (2), an observing and controlling unit (3) and a connecting plug connector (4), wherein the connecting plug piece (4) comprises a plug, a socket and a cable; the breaker body (1), the outdoor power supply transformer (2) and the observing and controlling unit (3) are in electrical connection through the connecting plug connector (4); and the breaker body (1) comprises a vacuum breaker (11) and a three-phase-zero sequence combination type mutual inductor (12). The method and the complete device are applicable to urban 10kV overhead network distribution circuits, and the product can be widely applied to t connection points of user branch boundaries.
Description
Technical field
The present invention relates to switchgear assembly on guard method that a kind of electric power system 10KV power distribution network uses and the intelligent post.Be exactly a kind of guard method on the spot and and matching used user's circuit breaker the complete sets of equipment specifically with automatic excision 10KV power distribution network line single phase grounding failure and phase fault and the power supply of fast quick-recovery transient fault and circuit real-time monitoring and control.
Technical background
Power distribution network is the important step of last direct user oriented power supply in the electric power system; can the user obtain safe and reliable electric energy; distribution protection equipment plays an important role, and the particularly intelligentized equipment of protecting has on the spot become preferred unit in the distribution network system.
In China; along with deepening constantly of city net, the upgrading of rural power grids; reliability and fail safe in the power supply in service of 10KV power distribution network improve constantly; backbone breaks down and the possibility of accident reduces greatly; at this time the branch line accident causes the ratio of backbone power failure constantly to raise; the branch line fault more and more becomes the principal element that influences the distribution safe operation, happens occasionally because of sole user's fault and protection mismate involve the accident that the whole piece feeder line has a power failure.Along with Chinese national economy continues, health, fast-developing, people's living standard improves year by year, requirement to power supply reliability is also more and more higher, and uninterrupted power supply had become the normal need in the modern society in 24 hours, and also becomes the important requirement of distribution network systems for the real-time monitoring of circuit.
At present, 10KV overhead distribution to each user's branch line porch is being used outdoor on-pole switch and isolating switch in a large number, but all has significant limitation, can not satisfy the demand of national economy and living standards of the people.My company finds to mainly contain following 3 limitation through conscientiously investigating: one, their great majority are manual operation, are mainly used in the effect of normal branch, zygonema road load current and insulating power supply, do not have the function of automatic user-isolated side accident; Though two, occurred the on-load switch device that some can isolated fault in recent years, as disclosed user demarcation load switch among the patent ZL200720053125.6, but its use has certain limitation, can not directly excise fault for phase fault, must wait transformer station's tripping operation once, the ability isolated fault causes whole circuit instantaneous power-offs then, this troubleshooting pattern, relatively poor for the selectivity of fault; Three, because above-mentioned this kind equipment does not possess the reclosing function, and in view of the particularity of China's weather, the insulator surface flashover that the frequent generation of 10KV overhead distribution causes for thunder and lightning, big wind-induced short, by things such as birds and the branch transient faults such as the short circuit that on lead, causes, ground connection that drop, therefore, for such fault, must carry out the artificial line walking localization of faults and fault type and carry out the fault eliminating, carry out manual reclosing then, restore electricity, the shortcoming of this troubleshooting pattern is that fault time that restores electricity is longer.
In sum; phase fault can not be directly excised in disclosed user demarcation load switch existence among the patent ZL200720053125.6; the defective of quick-recovery user transient fault power supply soon, therefore the novel equipment of protecting on the spot that can overcome above defective has become the preferred unit of user and Utilities Electric Co..
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art; provide a kind of and automatically, directly excise user side ground connection or short trouble and the power supply of fast quick-recovery user side transient fault, and the guard method that can monitor in real time circuit, protect on the spot by configuration of communications device reaches matching used with it user demarcation circuit breaker set apparatus.
The technical solution adopted in the present invention is: user demarcation circuit breaker set apparatus comprises breaker body, outdoor power system transformer, measurement and control unit, connection plug connector; Connect plug connector and comprise plug, socket and cable; Breaker body, outdoor power system transformer connect by being connected plug connector with measurement and control unit; Breaker body comprises vacuum circuit-breaker, three-phase-zero sequence combined instrument transformer, and the input of vacuum circuit-breaker is connected with the subscriber's drop mains side, and the output of vacuum circuit-breaker is connected with the input of customer charge side supply and distribution network; The input of outdoor power system transformer is connected with the subscriber's drop mains side, and output is connected with measurement and control unit; Three-phase-zero sequence combined instrument transformer is the punching instrument transformer, is installed on the three-phase of vacuum circuit-breaker output.
Described three-phase-zero sequence combined instrument transformer mainly is shaped by three-phase punching phase current mutual inductor and a punching zero sequence current mutual inductor integral cast, comprise base, phase CT iron core, zero sequence iron core, winding, casting epoxy body, described zero sequence iron core is " mouth " font or " O " font, form by high-magnetodensity silicon steel plate packing or coiling, described base, phase CT iron core, zero sequence iron core, winding are integral according to die casting by technology by epoxy resin, and base, phase CT iron core, zero sequence iron core, winding be mutually insulated each other.
Measurement and control unit comprises AC input module, control module, guidance panel and CPU module, and the CPU module is electrically connected with AC input module, control module, guidance panel.Measurement and control unit carries out analog acquisition by the AC input module, and analog quantity comprises phase current, zero-sequence current and a line voltage; Protect the adjusting of definite value, faulty indication and control operation by guidance panel; By control module output divide, switching signal and energy storage signal carry out electronic branch, combined floodgate, stored energy operation to breaker body and to the collection of breaker body position signalling, energy storage signal; Carry out fault distinguishing, input signal distinguishing, output signal control and data communication operation by the CPU module.
Use user demarcation circuit breaker set apparatus to be used to realize that 10KV power distribution network phase fault, single phase ground fault are handled and the guard method of fast quick-recovery transient fault power supply is specific as follows: 1. phase fault processing capacity-when circuit generation phase fault, when measurement and control unit detects the fault phase current and exceeds alternate protection setting value and trouble duration and exceed alternate protection delayed setting value, measurement and control unit output sub-gate signal is given breaker body, the breaker body tripping operation, the excision phase fault; 2. single phase ground fault processing capacity-when circuit generation single phase ground fault, when measurement and control unit detects zero-sequence current and exceeds zero-sequenceprotection setting value and trouble duration and exceed zero-sequenceprotection delayed setting value, measurement and control unit output sub-gate signal is given breaker body, the breaker body tripping operation, excision earth fault; 3. fast quick-recovery transient fault function of supplying power-for above-mentioned phase fault, earth fault, after the breaker body tripping operation, measurement and control unit carries out the reclosing timing, when timing exceeds the reclosure time setting value, measurement and control unit is exported switching signal automatically and is given breaker body, and breaker body closes a floodgate, for transient fault, measurement and control unit does not detect fault, restores electricity; For permanent fault, measurement and control unit detects fault current, and measurement and control unit is exported the post acceleration sub-gate signal immediately and given breaker body, breaker body tripping operation, excision permanent fault.
The invention has the beneficial effects as follows: because user demarcation circuit breaker set apparatus comprises demarcation circuit breaker body, outdoor power system transformer, measurement and control unit, connection plug connector described in the present invention; constituted the 10KV distribution network failure protective device of special complete; so the present invention has automatically, directly excises the function of user side fault and fast quick-recovery user transient fault power supply, can improve the local accident of supply network user side effectively and cause large-area power-cuts and user side transient fault in the network to cause the defective of power failure.
Description of drawings
Fig. 1 is a circuit structure block diagram of the present invention;
Fig. 2 is the structural representation of three-phase-zero sequence combined instrument transformer described in the present invention.
Embodiment
As shown in Figure 1, the present invention includes breaker body 1, outdoor power system transformer 2, measurement and control unit 3, connect plug connector 4, described connection plug connector 4 comprises plug, socket and cable, described breaker body 1, outdoor power system transformer 2 is electrically connected by the described plug connector 4 that is connected with described measurement and control unit 3, described breaker body 1 comprises vacuum circuit-breaker 11, three-phase-zero sequence combined instrument transformer 12, the input of described vacuum circuit-breaker 11 is connected with the service-wire mains side, the output of described vacuum circuit-breaker 11 is connected with the input of customer charge side supply and distribution network, described three-phase-zero sequence combined instrument transformer 12 is punching instrument transformers, and described three-phase-zero sequence combined instrument transformer 12 is installed on the three-phase of described vacuum circuit-breaker 11 outputs.
User demarcation circuit breaker set apparatus described in the present invention is the brand-new intelligentized outdoor line protective device of a kind of function.Breaker body 1 adopts vacuum switch, SF6 gas-insulated.Shown in Figure 2, breaker body 1 built-in three-phase-zero sequence combined instrument transformer 12, described three-phase-zero sequence combined instrument transformer 12 mainly is shaped by three-phase punching phase current mutual inductor and a punching zero sequence current mutual inductor integral cast, comprise base 21, phase CT iron core 22, zero sequence iron core 23, winding 24, casting epoxy body 25, described zero sequence iron core 23 is " mouth " font or " O " font, form by high-magnetodensity silicon steel plate packing or coiling, described base (21), phase CT iron core 22, zero sequence iron core 23, winding 24 is integral base 21 by epoxy resin according to die casting by technology, phase CT iron core 22, zero sequence iron core 23, winding 24 is mutually insulated each other.
Measurement and control unit 3 outward appearances adopt anti-condensation hat-shaped structure, and hardware mainly comprises AC input module 31, control module 32, guidance panel 33 and CPU module 34, and described CPU module 34 is electrically connected with described AC input module 31, control module 32, guidance panel 33.The present invention is mainly used in the responsibility separation place of 10KV overhead distribution and user's branch line, prevent that user side accident barrier from feeding through to the power distribution basic routing line, cause the accident of large-area power-cuts in the electric power networks, the power failure that causes of quick-recovery transient fault soon simultaneously, configuration of communications device can realize circuit is monitored in real time, thereby guarantees the power supply reliability of distribution network.
Claims (4)
1, a kind of user demarcation circuit breaker set apparatus, comprise breaker body (1), outdoor power system transformer (2), measurement and control unit (3), connect plug connector (4), described connection plug connector (4) comprises plug, socket and cable, described breaker body (1), outdoor power system transformer (2) is electrically connected by the described plug connector (4) that is connected with described measurement and control unit (3), it is characterized in that: described breaker body (1) comprises vacuum circuit-breaker (11), three-phase-zero sequence combined instrument transformer (12), the input of described vacuum circuit-breaker (11) is connected with the subscriber's drop mains side, the output of described vacuum circuit-breaker (11) is connected with the input of customer charge side supply and distribution network, the input of described outdoor power system transformer (2) is connected with the subscriber's drop mains side, the output of described outdoor power system transformer (2) is connected with measurement and control unit (3), described three-phase-zero sequence combined instrument transformer (12) is the punching instrument transformer, and described three-phase-zero sequence combined instrument transformer (12) is installed on the three-phase of described vacuum circuit-breaker (11) output.
2, user demarcation circuit breaker set apparatus according to claim 1, it is characterized in that: described three-phase-zero sequence combined instrument transformer (12) mainly is shaped by three-phase punching phase current mutual inductor and a punching zero sequence current mutual inductor integral cast, comprise base (21), phase CT iron core (22), zero sequence iron core (23), winding (24), casting epoxy body (25), described zero sequence iron core (23) is " mouth " font or " O " font, form by high-magnetodensity silicon steel plate packing or coiling, described base (21), phase CT iron core (22), zero sequence iron core (23), winding (24) is integral according to die casting by technology by epoxy resin, base (21), phase CT iron core (22), zero sequence iron core (23), winding (24) is mutually insulated each other.
3, user demarcation circuit breaker set apparatus according to claim 1 and 2 is characterized in that: described measurement and control unit (3) comprises that AC input module (31), guidance panel (33), control module (32), CPU module (34) are electrically connected.
4, a kind of described user demarcation circuit breaker set apparatus of claim 1 that uses realizes that power distribution network phase fault, single phase ground fault are handled and the guard method of fast quick-recovery transient fault power supply, it is characterized in that:
A. when circuit generation phase fault, when measurement and control unit (3) detects the fault phase current and exceeds alternate protection setting value and trouble duration and exceed alternate protection delayed setting value, measurement and control unit (3) output sub-gate signal is given breaker body (1), breaker body (1) tripping operation, the excision phase fault;
B. when circuit generation single phase ground fault, when measurement and control unit (3) detects zero-sequence current and exceeds zero-sequenceprotection setting value and trouble duration and exceed zero-sequenceprotection delayed setting value, measurement and control unit (3) output sub-gate signal is given breaker body (1), breaker body (1) tripping operation, excision earth fault;
C. for above-mentioned phase fault or earth fault, after breaker body (1) tripping operation, measurement and control unit (3) carries out the reclosing timing, when timing exceeds the reclosure time setting value, measurement and control unit (3) is exported switching signal automatically and is given breaker body (1), and breaker body (1) closes a floodgate, for transient fault, measurement and control unit (3) does not detect fault, restores electricity; For permanent fault, measurement and control unit (3) detects fault current, and measurement and control unit (3) is exported the post acceleration sub-gate signal immediately and given breaker body (1), breaker body (1) tripping operation, excision fault.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100300477A CN101505053B (en) | 2008-08-07 | 2008-08-07 | Power line protection method based on user boundary circuit breaker devices |
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| CN2008100300477A CN101505053B (en) | 2008-08-07 | 2008-08-07 | Power line protection method based on user boundary circuit breaker devices |
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| CN101505053A true CN101505053A (en) | 2009-08-12 |
| CN101505053B CN101505053B (en) | 2011-04-27 |
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| CN2008100300477A Active CN101505053B (en) | 2008-08-07 | 2008-08-07 | Power line protection method based on user boundary circuit breaker devices |
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| CN102394492A (en) * | 2011-09-29 | 2012-03-28 | 安徽鑫龙电器股份有限公司 | Circuit breaker closing protection device and closing protection method |
| CN102590562A (en) * | 2012-02-09 | 2012-07-18 | 江苏普朗克电力科技有限公司 | Connecting structure of geographic information system (GIS) testing device |
| CN102694419A (en) * | 2012-05-31 | 2012-09-26 | 广西泽龙电子科技有限公司 | Management system for integrated test and control |
| CN103163416A (en) * | 2013-03-28 | 2013-06-19 | 瑞安电力有限责任公司 | Method and device for detecting branch circuit single phase earth faults |
| CN103681087A (en) * | 2012-09-08 | 2014-03-26 | 江苏长耀电气科技集团有限公司 | Intelligent branching and demarcating vacuum circuit breaker complete device and protection method thereof |
| CN105162088A (en) * | 2015-10-19 | 2015-12-16 | 广东求精电气有限公司 | 10kV cable network feed line power distribution station fault automatic detection system |
| CN105186497A (en) * | 2015-09-02 | 2015-12-23 | 国网上海市电力公司 | Pole-mounted circuit breaker configuration structure and configuration method for high-voltage overhead line |
| CN112421590A (en) * | 2020-12-10 | 2021-02-26 | 晟望电气有限公司 | Relay protection device and relay protection method for power distribution automation system line |
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| WO2022121781A1 (en) * | 2020-12-12 | 2022-06-16 | 保定钰鑫电气科技有限公司 | Phase-to-phase short circuit processing method |
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| CN2793890Y (en) * | 2005-04-25 | 2006-07-05 | 上海大屯能源股份有限公司 | Integrated mutual inductor of explosive-proof electromagnetic starter |
| CN2867561Y (en) * | 2005-09-21 | 2007-02-07 | 费江海 | Mine flame-proof vacuum feed switch |
| CN201075365Y (en) * | 2007-06-22 | 2008-06-18 | 珠海许继电气有限公司 | User demarcation load switch |
| CN201263078Y (en) * | 2008-08-07 | 2009-06-24 | 珠海许继电气有限公司 | Integrated equipment of user demarcation circuit breaker |
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| CN102394492A (en) * | 2011-09-29 | 2012-03-28 | 安徽鑫龙电器股份有限公司 | Circuit breaker closing protection device and closing protection method |
| CN102590562A (en) * | 2012-02-09 | 2012-07-18 | 江苏普朗克电力科技有限公司 | Connecting structure of geographic information system (GIS) testing device |
| CN102694419A (en) * | 2012-05-31 | 2012-09-26 | 广西泽龙电子科技有限公司 | Management system for integrated test and control |
| CN102694419B (en) * | 2012-05-31 | 2016-01-20 | 广西泽龙电子科技有限公司 | Measurement and control integration management system |
| CN103681087A (en) * | 2012-09-08 | 2014-03-26 | 江苏长耀电气科技集团有限公司 | Intelligent branching and demarcating vacuum circuit breaker complete device and protection method thereof |
| CN103681087B (en) * | 2012-09-08 | 2015-12-02 | 江苏长耀电气科技集团有限公司 | Intelligence branch's demarcation vacuum circuit breaker the complete sets of equipment and guard method thereof |
| CN103163416A (en) * | 2013-03-28 | 2013-06-19 | 瑞安电力有限责任公司 | Method and device for detecting branch circuit single phase earth faults |
| CN103163416B (en) * | 2013-03-28 | 2015-04-01 | 国家电网公司 | Method and device for detecting branch circuit single phase earth faults |
| CN105186497A (en) * | 2015-09-02 | 2015-12-23 | 国网上海市电力公司 | Pole-mounted circuit breaker configuration structure and configuration method for high-voltage overhead line |
| CN105186497B (en) * | 2015-09-02 | 2018-11-09 | 国网上海市电力公司 | A kind of pole-mounted circuit breaker configuration structure and configuration method for high voltage overhead lines |
| CN105162088A (en) * | 2015-10-19 | 2015-12-16 | 广东求精电气有限公司 | 10kV cable network feed line power distribution station fault automatic detection system |
| CN105162088B (en) * | 2015-10-19 | 2016-06-15 | 广东求精电气有限公司 | A kind of power distribution station automatic fault detection system of 10kV cable system feeder line |
| CN112421590A (en) * | 2020-12-10 | 2021-02-26 | 晟望电气有限公司 | Relay protection device and relay protection method for power distribution automation system line |
| CN112421590B (en) * | 2020-12-10 | 2023-02-17 | 晟望电气有限公司 | Relay protection device and relay protection method for power distribution automation system line |
| WO2022121781A1 (en) * | 2020-12-12 | 2022-06-16 | 保定钰鑫电气科技有限公司 | Phase-to-phase short circuit processing method |
| CN112993769A (en) * | 2021-04-13 | 2021-06-18 | 叶剑海 | Cable rapid installation detection device for power distribution cabinet |
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