CN204131115U - Multifunctional comprehensive circuit protection device - Google Patents
Multifunctional comprehensive circuit protection device Download PDFInfo
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- CN204131115U CN204131115U CN201420464202.7U CN201420464202U CN204131115U CN 204131115 U CN204131115 U CN 204131115U CN 201420464202 U CN201420464202 U CN 201420464202U CN 204131115 U CN204131115 U CN 204131115U
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- breaker
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Abstract
The utility model provides a kind of multifunctional comprehensive circuit protection device being applied to 6-66kv network system, comprises by nonlinear dampling device Rk1, Rk2 and has the compound circuit that nonlinear damping resistor RG3 that ultralow impedance operator and super large can hold forms.The multifunctional comprehensive circuit protection device energy effective damping that the utility model provides also suppresses climbing and the amplitude of vacuum circuit-breaker transient recovery voltage, prevents the generation of cut-off overvoltage.In the process that circuit breaker cut-offs, damping and suppression are mutually changed due to electric energy and magnetic energy and produce the switching overvoltage of vibration, realize cut-offfing of vacuum circuit-breaker high capacity of short circuit.The Combination application of the nonlinear damping resistor adopted and the circuit design of artificial neutral point O, there is super lightning protection, damping and suppress the resonance between phase-phase, phase-ground and switching overvoltage, especially good inhibitory action is played to single-phase intermittent arc earthing overvoltage, play and eliminate the superpotential effect of electric arc.
Description
Technical field
The utility model belongs to electrical engineering technical field, specifically, relates 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 L di/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 the utility model patent 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 utility model 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.
The utility model additionally provides 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.
The utility model additionally provides a kind of circuit protection device being applied to 6-66kv network system, at contacts for vacuum-break switches two ends cross-over connection first nonlinear damping resistor RK1.
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, the multifunctional comprehensive circuit protection device that the utility model provides 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 utility model;
Fig. 2 is the electrical block diagram of the second technical scheme of the present utility model;
Fig. 3 is the circuit connection schematic diagram of the third technical scheme of the present utility model;
Fig. 4 is the test connection figure of the utility model embodiment 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 utility model embodiment 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 utility model embodiment 2;
Fig. 7 installs electrical network Multifunctional integrated protector record ripple figure additional in the utility model embodiment 3.
Embodiment
Below in conjunction with each drawings and Examples, the utility model is 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 contacts for vacuum-break switches two ends cross-over connection first nonlinear damping resistor RK1.
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 utility model 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.The multifunctional comprehensive circuit protection device using the utility model to provide 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.
The multifunctional comprehensive circuit protection device adopting the utility model to provide can destroy the electromagnetic viscosimeter also between damping circuit and electric capacity, and free oscillation electric charge can be made to let out people's the earth very soon, effectively suppresses 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, it is only some embodiment of the present utility model, the utility model is not limited to the restriction of above-described embodiment, all above-described embodiment is done according to technical spirit of the present utility model similar amendment, change and replacement, still belong in the scope of technical solutions of the utility model.Protection range of the present utility model 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 contacts for vacuum-break switches two ends cross-over connection first nonlinear damping resistor RK1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420464202.7U CN204131115U (en) | 2014-08-18 | 2014-08-18 | Multifunctional comprehensive circuit protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420464202.7U CN204131115U (en) | 2014-08-18 | 2014-08-18 | Multifunctional comprehensive circuit protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204131115U true CN204131115U (en) | 2015-01-28 |
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ID=52387436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420464202.7U Withdrawn - After Issue CN204131115U (en) | 2014-08-18 | 2014-08-18 | Multifunctional comprehensive circuit protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204131115U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356436A (en) * | 2014-08-18 | 2016-02-24 | 上海舒盈电气有限公司 | Multi-functional integrated circuit protection device |
| CN113872172A (en) * | 2020-06-30 | 2021-12-31 | Abb瑞士股份有限公司 | Device for overvoltage protection of subsea electrical equipment and method for operating the same |
-
2014
- 2014-08-18 CN CN201420464202.7U patent/CN204131115U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356436A (en) * | 2014-08-18 | 2016-02-24 | 上海舒盈电气有限公司 | Multi-functional integrated circuit protection device |
| CN113872172A (en) * | 2020-06-30 | 2021-12-31 | Abb瑞士股份有限公司 | Device for overvoltage protection of subsea electrical equipment and method for operating the same |
| CN113872172B (en) * | 2020-06-30 | 2024-03-26 | Abb瑞士股份有限公司 | Device for overvoltage protection of subsea electrical equipment and method for operating the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150128 Effective date of abandoning: 20190628 |