CN104485651A - Circuit breaker transient recovery voltage inhibition system and method of 1000kV alternative-current filter group - Google Patents
Circuit breaker transient recovery voltage inhibition system and method of 1000kV alternative-current filter group Download PDFInfo
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- CN104485651A CN104485651A CN201410790627.1A CN201410790627A CN104485651A CN 104485651 A CN104485651 A CN 104485651A CN 201410790627 A CN201410790627 A CN 201410790627A CN 104485651 A CN104485651 A CN 104485651A
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- circuit breaker
- current filter
- alternating current
- filter group
- recovery voltage
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Abstract
The invention provides a circuit breaker transient recovery voltage inhibition system and a circuit breaker transient recovery voltage inhibition method of a 1000kV alternative-current filter group. The circuit breaker transient recovery voltage inhibition system comprises an alternative-current filter group, a circuit breaker CB, an auxiliary switch CBR, a damping resistor R and an alternative-current bus, wherein one end of the alternative-current filter group is connected with the alternative-current bus through the circuit breaker CB; the other end of the alternative-current filter group is grounded; the auxiliary switch CBR and the damping resistor R are connected in parallel with two ends of the circuit breaker CB after being connected in series. By adopting the circuit breaker transient recovery voltage inhibition system and the circuit breaker transient recovery voltage inhibition method of the1000kV alternative-current filter group, the probability that the gate of the circuit breaker is successfully dissociated is increased, the requirements on the manufacturing parameters of the circuit breaker are rlowered, the capability of the circuit breaker in breaking capacity current is effectively improved, and the transient recovery voltage is reduced.
Description
Technical field
The invention belongs to transmission system overvoltage protection technical field, be specifically related to a kind of 1000kV alternating current filter group circuit breaker transient recovery voltage and suppress system and method.
Background technology
Recovery voltage is after the blow-out of switch drop-out current, appears at the voltage between switch pole two-terminal.This voltage can think continuous print two sections, is originally transient recovery voltage, is then power frequency recovery voltage.Rated short circuit drop-out current and the transient recovery voltage peak value relevant to rated short circuit drop-out current are the nominal parameter of circuit breaker.
Engineering practice and simulation calculation show, during the breaker open operation of 1000kV alternating current filter group, the capacity current that need cut-off is larger.Certain Engineering Simulation calculates and shows, the overvoltage that current conversion station 1000kV AC failure cleaning or the load rejection of DC bipolar line fault bipolar locking produce is high, harmonic wave large, cut-offs the total effective value of capacitance current and can reach 1.91kA during breaker open operation; 1.85kA can be reached under isolated island mode.And the filter and breaker that equipment supplier can supply can cut off capacitance current 1.5kA (RMS), the capacitance current that thus two station circuit breakers cut alternating current filter group under power-frequency overvoltage has exceeded this index.Due to the existence of filter capacity residual voltage, be at least more than the twice of busbar voltage, transient recovery voltage is very high.This proposes high requirement to circuit breaker Fabrication parameter, also reduces the probability of circuit breaker success separating brake.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of 1000kV alternating current filter group circuit breaker transient recovery voltage and suppressing system and method, effectively can improve the ability that circuit breaker cut-offs capacity current, reducing transient recovery voltage.
In order to realize foregoing invention object, the present invention takes following technical scheme:
The invention provides a kind of 1000kV alternating current filter group circuit breaker transient recovery voltage and suppress system, described system comprises alternating current filter group, circuit breaker CB, auxiliary switch CBR, damping resistance R and ac bus; Described alternating current filter group one end is connected with ac bus by circuit breaker CB, other end ground connection; Described auxiliary switch CBR and damping resistance R is connected in parallel on described circuit breaker CB two ends after connecting.
Described alternating current filter group comprises n alternating current filter and n circuit breaker; N alternating current filter be respectively alternating current filter FILT1, alternating current filter FILT2 ..., alternating current filter FILTn, a n circuit breaker be respectively circuit breaker CB1, circuit breaker CB2 ..., circuit breaker CBn.
Alternating current filter FILT1 one end ground connection, the other end connects in circuit breaker CB1, composition FILT1-CB1 branch road; Alternating current filter FILT2 one end ground connection, the other end connects in circuit breaker CB2, composition FILT2-CB2 branch road; By that analogy, alternating current filter FILTn one end ground connection, the other end connects in circuit breaker CBn, composition FILTn-CBn branch road; FILT1-CB1 branch road, FILT2-CB2 branch road ..., after FILTn-CBn branch circuit parallel connection, connecting breaker CB.
The resistance of described damping resistance R is chosen within the scope of 400 Ω ~ 600 Ω.
The present invention also provides a kind of 1000kV alternating current filter group circuit breaker transient recovery voltage suppressing method, said method comprising the steps of:
Step 1: circuit breaker CB, circuit breaker CB1, circuit breaker CB2 ..., circuit breaker CBn and auxiliary switch CBR is normally closed when normal operation, when needing alternating current filter group to excise, circuit breaker CB receives separating brake after separating brake order;
Step 2: receive after separating brake order after 10ms, circuit breaker CB separating brake, namely damping resistance R turn-on time is 10ms.
Compared with prior art, beneficial effect of the present invention is:
The invention provides a kind of 1000kV alternating current filter group circuit breaker transient recovery voltage and suppress system and method, although the capacitance current that after adopting transient recovery voltage suppression system, main contact cuts off does not change, but because the TRV that exists of damping resistance reduces half, after being conducive to main contact arc extinction, can not resume combustion or repeated breakdown in the recovery process of fracture dielectric strength.And when resistance contact head is separated, recovery voltage also decreases, though reduce few, only about 20%, the electric current cut off is only about 30% of main contact, cut-offs capacity and reduces, make it easily to cut-off.Therefore, the present invention can improve the probability of circuit breaker success separating brake, reduces the requirement of circuit breaker Fabrication parameter.
Accompanying drawing explanation
Fig. 1 is that in the embodiment of the present invention, 1000kV alternating current filter group circuit breaker transient recovery voltage suppresses system construction drawing.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As Fig. 1, the invention provides a kind of 1000kV alternating current filter group circuit breaker transient recovery voltage and suppress system, described system comprises alternating current filter group, circuit breaker CB, auxiliary switch CBR, damping resistance R and ac bus; Described alternating current filter group one end is connected with ac bus by circuit breaker CB, other end ground connection; Described auxiliary switch CBR and damping resistance R is connected in parallel on described circuit breaker CB two ends after connecting.
Described alternating current filter group comprises n alternating current filter and n circuit breaker; N alternating current filter be respectively alternating current filter FILT1, alternating current filter FILT2 ..., alternating current filter FILTn, a n circuit breaker be respectively circuit breaker CB1, circuit breaker CB2 ..., circuit breaker CBn.
Alternating current filter FILT1 one end ground connection, the other end connects in circuit breaker CB1, composition FILT1-CB1 branch road; Alternating current filter FILT2 one end ground connection, the other end connects in circuit breaker CB2, composition FILT2-CB2 branch road; By that analogy, alternating current filter FILTn one end ground connection, the other end connects in circuit breaker CBn, composition FILTn-CBn branch road; FILT1-CB1 branch road, FILT2-CB2 branch road ..., after FILTn-CBn branch circuit parallel connection, connecting breaker CB.
The resistance of described damping resistance R is chosen within the scope of 400 Ω ~ 600 Ω.
The present invention also provides a kind of 1000kV alternating current filter group circuit breaker transient recovery voltage suppressing method, said method comprising the steps of:
Step 1: circuit breaker CB, circuit breaker CB1, circuit breaker CB2 ..., circuit breaker CBn and auxiliary switch CBR is normally closed when normal operation, when needing alternating current filter group to excise, circuit breaker CB receives separating brake after separating brake order;
Step 2: receive after separating brake order after 10ms, circuit breaker CB separating brake, namely damping resistance R turn-on time is 10ms.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; those of ordinary skill in the field still can modify to the specific embodiment of the present invention with reference to above-described embodiment or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims of the present invention awaited the reply.
Claims (5)
1. 1000kV alternating current filter group circuit breaker transient recovery voltage suppresses a system, it is characterized in that: described system comprises alternating current filter group, circuit breaker CB, auxiliary switch CBR, damping resistance R and ac bus; Described alternating current filter group one end is connected with ac bus by circuit breaker CB, other end ground connection; Described auxiliary switch CBR and damping resistance R is connected in parallel on described circuit breaker CB two ends after connecting.
2. 1000kV alternating current filter group circuit breaker transient recovery voltage according to claim 1 suppresses system, it is characterized in that: described alternating current filter group comprises n alternating current filter and n circuit breaker; N alternating current filter be respectively alternating current filter FILT1, alternating current filter FILT2 ..., alternating current filter FILTn, a n circuit breaker be respectively circuit breaker CB1, circuit breaker CB2 ..., circuit breaker CBn.
3. 1000kV alternating current filter group circuit breaker transient recovery voltage according to claim 2 suppresses system, and it is characterized in that: alternating current filter FILT1 one end ground connection, the other end connects in circuit breaker CB1, composition FILT1-CB1 branch road; Alternating current filter FILT2 one end ground connection, the other end connects in circuit breaker CB2, composition FILT2-CB2 branch road; By that analogy, alternating current filter FILTn one end ground connection, the other end connects in circuit breaker CBn, composition FILTn-CBn branch road; FILT1-CB1 branch road, FILT2-CB2 branch road ..., after FILTn-CBn branch circuit parallel connection, connecting breaker CB.
4. 1000kV alternating current filter group circuit breaker transient recovery voltage according to claim 1 suppresses system, it is characterized in that: the resistance of described damping resistance R is chosen within the scope of 400 Ω ~ 600 Ω.
5. a 1000kV alternating current filter group circuit breaker transient recovery voltage suppressing method, is characterized in that: said method comprising the steps of:
Step 1: circuit breaker CB, circuit breaker CB1, circuit breaker CB2 ..., circuit breaker CBn and auxiliary switch CBR is normally closed when normal operation, when needing alternating current filter group to excise, circuit breaker CB receives separating brake after separating brake order;
Step 2: receive after separating brake order after 10ms, circuit breaker CB separating brake, namely damping resistance R turn-on time is 10ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410790627.1A CN104485651A (en) | 2014-12-18 | 2014-12-18 | Circuit breaker transient recovery voltage inhibition system and method of 1000kV alternative-current filter group |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410790627.1A CN104485651A (en) | 2014-12-18 | 2014-12-18 | Circuit breaker transient recovery voltage inhibition system and method of 1000kV alternative-current filter group |
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| CN104485651A true CN104485651A (en) | 2015-04-01 |
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| CN201410790627.1A Pending CN104485651A (en) | 2014-12-18 | 2014-12-18 | Circuit breaker transient recovery voltage inhibition system and method of 1000kV alternative-current filter group |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202854295U (en) * | 2012-05-29 | 2013-04-03 | 苏州电器科学研究院股份有限公司 | High-voltage circuit-breaker transient recovery voltage regulation device |
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2014
- 2014-12-18 CN CN201410790627.1A patent/CN104485651A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202854295U (en) * | 2012-05-29 | 2013-04-03 | 苏州电器科学研究院股份有限公司 | High-voltage circuit-breaker transient recovery voltage regulation device |
Non-Patent Citations (4)
| Title |
|---|
| 庄稼人: "并联型瞬态恢复电压波形调节电阻器参数计算与分析", 《高压电器》 * |
| 张华赢，杨兰均，李良书: "投切电容器专用真空断路器性能研究", 《电力电容器与无功补偿》 * |
| 赵诚: "带有低值并联电阻的断路器主断口的恢复电压", 《高压电器》 * |
| 马烨，郭洁，陈洁: "±1100kV直流系统整流侧交流滤波器断路器开断时负荷特性研究", 《高压电器》 * |
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Application publication date: 20150401 |
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| RJ01 | Rejection of invention patent application after publication |