CN105356436A - Multi-functional integrated circuit protection device - Google Patents
Multi-functional integrated circuit protection device Download PDFInfo
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- CN105356436A CN105356436A CN201410404655.5A CN201410404655A CN105356436A CN 105356436 A CN105356436 A CN 105356436A CN 201410404655 A CN201410404655 A CN 201410404655A CN 105356436 A CN105356436 A CN 105356436A
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- circuit protection
- nonlinear damping
- damping resistor
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Abstract
The invention provides a multi-functional integrated circuit protection device applied to a 6-66kv power grid system. The multi-functional integrated circuit protection device comprises a composite circuit formed by nonlinear damping devices Rk1 and Rk2 and a nonlinear damping resistor RG3 having the characteristic of ultra-low impedance and an oversized energy capacity. According to the invention, the multi-functional integrated circuit protection device can effective damp and suppress the rising rate and amplitude of transient recovery voltage of a vacuum circuit breaker, and prevent the generation of over voltage. In the on-off of the circuit breaker, operating over voltage of oscillation generation due to mutual conversion of electric energy and magnetic energy is damped and suppressed to switch on-off of high short circuit capacity of the vacuum circuit breaker. Through the combined application of the nonlinear damping resistors and the circuit design of an artificial neutral point O, the multi-functional integrated circuit protection device has the functions of excellent lightning protection, damping and suppression of phase-phase and phase-ground resonance and operating over voltage, and especially excellent suppression of single-phase intermittent arc grounding over voltage, and serves to eliminate electric arc over voltage.
Description
Technical field
The invention belongs to electrical engineering technical field, specifically, relate to the multifunctional comprehensive circuit protection device of the network system being applied to 6-66kv.It can prevent the generation of cut-off overvoltage, and effective damping also suppresses climbing and the amplitude of vacuum circuit-breaker transient recovery voltage.Realize cut-offfing of high capacity of short circuit.There is super lightning protection, damping and suppress the resonance overvoltage between phase-phase, phase-ground and switching overvoltage, strong inhibitory action can be played to single-phase intermittent arc earthing overvoltage.
Background technology
Circuit breaker applies comparatively general switchgear in High-Voltage Electrical Appliances, it to maintaining the safety of electric power system, economy, reliability service play very important effect.Divide from the arc-extinguishing medium used, oil circuit breaker, air circuit, vacuum circuit-breaker type can be divided into.Wherein, vacuum circuit-breaker, because of special structure and good performance, is widely used in the electric power system portion of 6-66kV.
Vacuum circuit-breaker due to the dielectric strength of vacuum very high, arc extinguishing is very competent, circuit breaker just produces arc extinction and stops before power current natural zero-crossing, and there is the high shut off value of electric current, the overvoltage caused by damming is easy to the electric equipment puncturing weak dielectric intensity.There are very high rate of rise of transient recovery voltage and amplitude in vacuum circuit-breaker contact two ends when cut-offfing in addition, and the arc extinguishing success or not of vacuum circuit-breaker depends primarily on climbing and the amplitude of transient recovery voltage Ldi/dt.
Current domestic and international market solves 6-66KV network system resonance and superpotential main method and product to have: overvolatge devices such as metal oxide arrester, resistance-capacitance absorption protective device, arc suppression coil and TBP arc extinction cabinet etc., its effect is not all very good.
Summary of the invention
The object of type patent of the present invention is to provide a kind of Multifunctional integrated protector of the electric equipment such as generator, vacuum circuit-breaker, transformer, transmission line, high-tension motor be widely used in 6-66KV electrical network, by nonlinear dampling device Rk1, Rk2 and have the compound circuit that nonlinear damping resistor RG3 that ultralow impedance operator and super large can hold forms.
The invention provides a kind of multifunctional comprehensive circuit protection device being applied to 6-66kv network system.
Concrete technical scheme is:
Be applied to a multifunctional comprehensive circuit protection device for 6-66kv network system, comprise two the first nonlinear damping resistor RK1, connect mutually, be connected across every phase vacuum circuit-breaker two ends; During breaker closing, each two the first nonlinear damping resistor RK1 mutually form parallel connection, and the second nonlinear damping resistor RK2 be in parallel with two is in series, each phase RK2 line, at the neutral point that O point formation one is artificial; Between artificial neutral point O and ground G, be provided with two in parallel high-power nonlinear damping resistor RG3 that there is super-low impedance characteristic and super large and can hold.
By adopting in this way:
Every phase two nonlinear damping resistor RK1 are attempted by vacuum circuit-breaker two ends after connecting, and the high energy electric leakage pressure limiting characteristic utilizing it ultralow, can prevent and treat the generation of cut-off overvoltage, height dam cut-off time, play the effect of the change of current and demagnetization energy dissipating.
During breaker closing, go here and there with two Rk2 phases be in parallel after A is phase-changed into two Rk1 parallel connections, again combined with corresponding B phase, C become star-connection, at the neutral point that O point formation one is artificial, insulation between its phase and neutral point can be considered by the standard of phase voltage, utilize its ultralow high energy of nonlinear dampling device to leak electricity pressure limiting characteristic, effective damping can be reached equally and suppress the effect of resonance overvoltage between phase-phase and switching overvoltage.
Between artificial neutral point O and ground G, be provided with the high-power nonlinear damping resistor RG3 of zero-sequence current passage, holding of the impedance operator utilizing it ultralow and super large, the effect of super lightning protection can be played, and effectively suppress the switching overvoltage that produced by inductance capacitance power conversion between phase-ground.
Present invention also offers the multifunctional comprehensive circuit protection device that another kind is applied to 6-66kv network system.
Concrete technical scheme is: a kind of multifunctional comprehensive circuit protection device being applied to 6-66kv network system, is in series with the first nonlinear damping resistor RK1 and the second nonlinear damping resistor RK2; With described RK1 and the RK2 line of other two-phase, at the neutral point that O point formation one is artificial, through having the high-power nonlinear damping resistor RG3 ground connection that super-low impedance characteristic and super large can hold.
The device that the compound circuit of this single group is made can be arranged on power plant, transformer station, each position of circuit, can reach super lightning protection, harmonic elimination, damping equally and suppress the superpotential effect of resonance overvoltage, switching overvoltage and single-phase intermittent arc earthing.
Present invention also offers a kind of circuit protection device being applied to 6-66kv network system, at the first nonlinear damping resistor RK1 of contacts for vacuum-break switches two ends cross-over connection.
The high energy electric leakage pressure limiting characteristic utilizing it ultralow, prevents the generation of cut-off overvoltage, height dam cut-off time, the effect of the change of current and demagnetization energy dissipating can be played.
Compared with prior art, multifunctional comprehensive circuit protection device provided by the invention adopts nonlinear damping resistor to protect electric equipments such as generator, transformer, transmission line, high-tension motors; Offset except ferro resonance and surge current suppression have good damping and extinguishing arc effect, by the overvoltage relatively and between phase and phase of neutral point non-direct grounding system electrical network, can effectively be limited in lower voltage levvl.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the first technical scheme of the present invention;
Fig. 2 is the electrical block diagram of the second technical scheme of the present invention;
Fig. 3 is the circuit connection schematic diagram of the third technical scheme of the present invention;
Fig. 4 is the test connection figure of the embodiment of the present invention 1;
Fig. 5 is test record ripple figure when not adopting single-phase the having a rest property arc grounding of the circuit of multifunctional comprehensive circuit protection device generation in the embodiment of the present invention 2;
Fig. 6 is test record ripple figure when adopting single-phase the having a rest property arc grounding of the circuit of multifunctional comprehensive circuit protection device generation in the embodiment of the present invention 2;
Fig. 7 installs electrical network Multifunctional integrated protector record ripple figure additional in the embodiment of the present invention 3.
Embodiment
Below in conjunction with each drawings and Examples, the present invention will be further described.
As shown in Figure 1:
Be applied to a multifunctional comprehensive circuit protection device for 6-66kv network system, comprise two the first nonlinear damping resistor RK1, connect mutually, be connected across every phase vacuum circuit-breaker two ends; During breaker closing, each two the first nonlinear damping resistor RK1 mutually form parallel connection, and the second nonlinear damping resistor RK2 be in parallel with two is in series, each phase RK2 line, at the neutral point that O point formation one is artificial; Between artificial neutral point O and ground G, be provided with two in parallel high-power nonlinear damping resistor RG3 that there is super-low impedance characteristic and super large and can hold.
As shown in Figure 2:
Be applied to a multifunctional comprehensive circuit protection device for 6-66kv network system, be in series with the first nonlinear damping resistor RK1 and the second nonlinear damping resistor RK2; With described RK1 and the RK2 line of other two-phase, at the neutral point that O point formation one is artificial, through having the high-power nonlinear damping resistor RG3 ground connection that super-low impedance characteristic and super large can hold.
As shown in Figure 3:
Be applied to a circuit protection device for 6-66kv network system, at the first nonlinear damping resistor RK1 of contacts for vacuum-break switches two ends cross-over connection.
Embodiment 1: excision no-load transformer prevents cut-off overvoltage from testing;
Vacuum circuit-breaker, when excising no-load transformer, likely to produce the cut-off overvoltage up to more than 200kV, adopts multifunctional comprehensive circuit protection device provided by the present invention at fracture two ends owing to damming, by no-load transformer excision test.
Shown in Fig. 4, be no-load transformer excision test connection figure.
Through test, mains side cut-off overvoltage maximum appears at C phase, and amplitude is 7880V, and load-side cut-off overvoltage maximum appears at A phase, and amplitude is only 8487V.Use multifunctional comprehensive circuit protection device provided by the invention can play the good protective effect preventing cut-off overvoltage.
Embodiment 2: single-phase intermittent arc earthing is tested
Single-phase earthing is the major failure form of electric power system, and having a rest property arc grounding causes the electromagnetic viscosimeter between inductance and electric capacity, is formed throughout system-wide arc grounding over-voltage.
Capacitance current based on cable reaches the power distribution network of more than 100A, and the test record ripple figure of single-phase having a rest property arc grounding occurs A phase:
The test record ripple figure of single-phase having a rest property arc grounding is there is in Fig. 5 when being and not installing multifunctional comprehensive circuit protection device additional;
The test record ripple figure of single-phase having a rest property arc grounding is there is in Fig. 6 when being and installing multifunctional comprehensive circuit protection device additional;
Through test, do not install multifunctional comprehensive circuit protection device in circuit additional, the voltage maximum peak voltage of normal phase A phase reaches 38KV to 23KV, B phase maximum peak voltage, and C phase maximum peak voltage reaches 36KV;
And after installing multifunctional comprehensive circuit protection device in circuit additional, A phase maximum peak voltage is 12KV, B phase maximum peak voltage is 17.5KV, C phase maximum peak voltage is 17KV.
Adopt multifunctional comprehensive circuit protection device provided by the invention to destroy and electromagnetic viscosimeter between damping circuit and electric capacity, and free oscillation electric charge can be made to let out people's the earth very soon, effectively suppress the generation of normal phase arc grounding over-voltage.Arc suppression coil can be cancelled; Reach the requirement of the apparatus insulated safe operation of system electrical.
Embodiment 3: the quick-speed turning on-off test of failed shorted electric current
Along with electric power system transmission capacity constantly expands, grid short circuit levels of current constantly increases, and there will be maximum short circuit current and exceedes circuit breaker rated short circuit drop-out current and the arc extinguishing that there is circuit breaker unsuccessfully cannot cut-off the accident of short trouble.Electric equipment is wrecked.
Electrical network Multifunctional integrated protector, its can effective damping suppress climbing and the amplitude of vacuum circuit-breaker transient recovery voltage, and it has the effect of change of current energy dissipating demagnetization blow-out.
50KA three short circuit current breaking test is carried out respectively with vacuum circuit-breaker on the same stage.
It is three-phase circuit direct test winding diagram shown in Fig. 7;
Through test, after having installed multifunctional comprehensive circuit protection device additional, three-phase fault short circuit current can cut-off smoothly.The maximum amplitude 26KV of the transient recovery voltage at effective suppression vacuum circuit-breaker fracture two ends, makes the electric arc of vacuum circuit-breaker restrike, and can guarantee to cut-off failed shorted electric current, prevent the generation of harmfulness accident.And when not installing compound electrical network protective circuit additional, the record ripple figure of the three phase short circuit fault electric current on same vacuum circuit-breaker, result of the test shows that A phase and C phase all fail effectively to cut-off, thus causes A C two-phase vacuum tube scaling loss.
The above, be only some embodiment of the present invention, the present invention is not limited to the restriction of above-described embodiment, all above-described embodiment is done according to technical spirit of the present invention similar amendment, change and replacement, still belong in the scope of technical solution of the present invention.Protection scope of the present invention is only defined by claims.
Claims (3)
1. be applied to a multifunctional comprehensive circuit protection device for 6-66kv network system, it is characterized in that: comprise two the first nonlinear damping resistor RK1, connect mutually, be connected across every phase vacuum circuit-breaker two ends; During breaker closing, each two the first nonlinear damping resistor RK1 mutually form parallel connection, and the second nonlinear damping resistor RK2 be in parallel with two is in series, each phase RK2 line, at the neutral point that O point formation one is artificial; Between artificial neutral point O and ground G, be provided with two in parallel high-power nonlinear damping resistor RG3 that there is super-low impedance characteristic and super large and can hold.
2. be applied to a multifunctional comprehensive circuit protection device for 6-66kv network system, it is characterized in that: be in series with the first nonlinear damping resistor RK1 and the second nonlinear damping resistor RK2; With described RK1 and the RK2 line of other two-phase, at the neutral point that O point formation one is artificial, through having the high-power nonlinear damping resistor RG3 ground connection that super-low impedance characteristic and super large can hold.
3. be applied to a circuit protection device for 6-66kv network system, it is characterized in that: at the first nonlinear damping resistor RK1 of contacts for vacuum-break switches two ends cross-over connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410404655.5A CN105356436B (en) | 2014-08-18 | 2014-08-18 | Multifunctional comprehensive circuit protection device |
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| CN201410404655.5A CN105356436B (en) | 2014-08-18 | 2014-08-18 | Multifunctional comprehensive circuit protection device |
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| CN105356436A true CN105356436A (en) | 2016-02-24 |
| CN105356436B CN105356436B (en) | 2019-06-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494701A (en) * | 2018-11-30 | 2019-03-19 | 国网湖北省电力有限公司黄石供电公司 | A kind of substation overvoltage protection circuit and its application |
| WO2019157105A1 (en) * | 2018-02-07 | 2019-08-15 | Chaoyang Semiconductor Jiangyin Technology Co., Ltd. | Switching regulator stability control circuit and methodology |
| TWI689076B (en) * | 2017-03-31 | 2020-03-21 | 大陸商萬民半導體（澳門）有限公司 | High surge bi-directional transient voltage suppressor |
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| US4023071A (en) * | 1975-06-09 | 1977-05-10 | Fussell Gerald W | Transient and surge protection apparatus |
| CN85202138U (en) * | 1985-04-01 | 1986-03-26 | 中国科学院等离子体物理研究所 | Parallel zinc oxide over-voltage limiter for vacuum switch |
| CN2779570Y (en) * | 2004-10-08 | 2006-05-10 | 朱仲彦 | High energy ZnO and PTC compound component |
| CN201498988U (en) * | 2009-10-10 | 2010-06-02 | 朱仲彦 | ZnO and SiC compound circuit used for arc extinction, harmony extinction and overvoltage protection |
| CN201509072U (en) * | 2009-08-27 | 2010-06-16 | 常州市明及电气技术开发有限公司 | Protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage |
| CN204131115U (en) * | 2014-08-18 | 2015-01-28 | 上海舒盈电气有限公司 | Multifunctional comprehensive circuit protection device |
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2014
- 2014-08-18 CN CN201410404655.5A patent/CN105356436B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4023071A (en) * | 1975-06-09 | 1977-05-10 | Fussell Gerald W | Transient and surge protection apparatus |
| CN85202138U (en) * | 1985-04-01 | 1986-03-26 | 中国科学院等离子体物理研究所 | Parallel zinc oxide over-voltage limiter for vacuum switch |
| CN2779570Y (en) * | 2004-10-08 | 2006-05-10 | 朱仲彦 | High energy ZnO and PTC compound component |
| CN201509072U (en) * | 2009-08-27 | 2010-06-16 | 常州市明及电气技术开发有限公司 | Protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage |
| CN201498988U (en) * | 2009-10-10 | 2010-06-02 | 朱仲彦 | ZnO and SiC compound circuit used for arc extinction, harmony extinction and overvoltage protection |
| CN204131115U (en) * | 2014-08-18 | 2015-01-28 | 上海舒盈电气有限公司 | Multifunctional comprehensive circuit protection device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI689076B (en) * | 2017-03-31 | 2020-03-21 | 大陸商萬民半導體（澳門）有限公司 | High surge bi-directional transient voltage suppressor |
| WO2019157105A1 (en) * | 2018-02-07 | 2019-08-15 | Chaoyang Semiconductor Jiangyin Technology Co., Ltd. | Switching regulator stability control circuit and methodology |
| US10498242B2 (en) | 2018-02-07 | 2019-12-03 | Chaoyang Semiconductor Jiangyin Technology Co., Ltd. | Switching regulator stability control circuit and methodology |
| US11018585B2 (en) | 2018-02-07 | 2021-05-25 | Chaoyang Semiconductor Jiangyin Technology Co., Ltd. | Switching regulator stability control circuit and methodology |
| CN109494701A (en) * | 2018-11-30 | 2019-03-19 | 国网湖北省电力有限公司黄石供电公司 | A kind of substation overvoltage protection circuit and its application |
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| Publication number | Publication date |
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| CN105356436B (en) | 2019-06-28 |
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Address after: 201318, room 266, 171 Zhou Dong Road, Zhou Pu town, Shanghai, Pudong New Area Patentee after: Shanghai Shuying Technology Co., Ltd Address before: 201318, room 266, 171 Zhou Dong Road, Zhou Pu town, Shanghai, Pudong New Area Patentee before: SHANGHAI SHUYING ELECTRIC CO., LTD. |