CN109494701A - A kind of substation overvoltage protection circuit and its application - Google Patents
A kind of substation overvoltage protection circuit and its application Download PDFInfo
- Publication number
- CN109494701A CN109494701A CN201811453079.8A CN201811453079A CN109494701A CN 109494701 A CN109494701 A CN 109494701A CN 201811453079 A CN201811453079 A CN 201811453079A CN 109494701 A CN109494701 A CN 109494701A
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- phase
- circuit
- overvoltage protection
- substation
- damping resistance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- Emergency Protection Circuit Devices (AREA)
Abstract
本发明公开了一种变电站用过电压防护电路及其应用，包括有三相进线侧电路、三相出线侧电路和自带中性点的星型连接电路；三相进线侧电路由A1、B1、C1三相进线端和三相联动隔离开关S1以及三相阻尼电阻R1依次串联而成；三相出线侧电路由A2、B2、C2三相出线端和三相联动隔离开关S2以及三相阻尼电阻R2依次串联而成；三相阻尼电阻R1通过导线a、b、c以相同的相序对应连接三相阻尼电阻R2，导线a、b、c分别连接星型连接电路的三相输入端；星型连接电路的每相电路上均串联有阻尼电阻R3，星型连接电路的中性点通过阻尼电阻R4接地；本发明结构简单、设计巧妙，有效实现了对母线断路器和出线间隔对地短路故障的过电压防护。
The invention discloses an overvoltage protection circuit for a substation and its application, including a three-phase incoming line side circuit, a three-phase outgoing line side circuit and a star connection circuit with its own neutral point; the three-phase incoming line side circuit consists of A1, The three-phase incoming terminals of B1 and C1 are connected in series with the three-phase linkage isolating switch S1 and the three-phase damping resistor R1; The phase damping resistors R2 are connected in series in sequence; the three-phase damping resistors R1 are connected to the three-phase damping resistors R2 in the same phase sequence through the wires a, b, and c, and the wires a, b, and c are respectively connected to the three-phase input of the star connection circuit. A damping resistor R3 is connected in series on each phase circuit of the star-connected circuit, and the neutral point of the star-connected circuit is grounded through the damping resistor R4; the invention has simple structure and ingenious design, and effectively realizes the separation of bus circuit breakers and outgoing lines. Overvoltage protection for short-circuit faults to ground.
Description
Technical field
The present invention relates to Hyper-Voltage of Power Systems and insulating protection technical field, especially a kind of substation is anti-with overvoltage
Protection circuit and its application.
Background technique
It currently, is one of most important performance of breaker to the quick-speed turning on-off of short-circuit current, especially with generator, main transformer
The three-phase shortcircuit of depressor outlet side is very.The big amount circuit and high short circuit breaking capacity that breaker cannot withstand often result in hair
Motor stator or main transformer winding.The operation of electric system, shut off, the overvoltage moment of the generations such as resonance and lightning stroke is all in prestige
The safe operation of insulation and the electric system of electrical equipment is coerced, wherein especially the tightest with single-phase intermittent arc earthing overvoltage
Weight often because singlephase earth fault becomes multiphase ground fault in turn, and causes electric power because processing causes fault spread not in time
The large-area power-cuts of system.At the same time, there is distributed inductances, capacitor these energy storage devices in the power system, in circuit
It changes and passes by transient, due to the conversion of energy between source side or the energy storage device of load-side, it will the oscillation of energy is induced, this
And the main reason for causing a variety of overvoltage of phase-phase, phase-ground to generate.
Thus, effectively inhibit various overvoltage, facilitates to weak isolatings such as generator, power transformer, high-tension motors
The safety of equipment plays positive protective effect.
Summary of the invention
Present invention aim to a variety of overvoltage for solving to generate in current electric system, and generator, electric power to be caused to become
The problem of electrical equipments such as depressor, high-tension motor are damaged, provide thus a kind of substation's overvoltage protection circuit and
It is applied.
Concrete scheme of the invention is: a kind of substation's overvoltage protection circuit includes three-phase inlet wire lateral circuit, three
The star-like connection circuit of phase outlet lateral circuit and included neutral point；Three-phase inlet wire lateral circuit is respectively by A1, B1, C1 three-phase end of incoming cables
It is sequentially connected in series with three-phase linkage isolating switch S1 and three-phase damping resistance R1；Three-phase outlet lateral circuit respectively by A2, B2,
C2 three-phase leading-out terminal and three-phase linkage isolating switch S2 and three-phase damping resistance R2 are sequentially connected in series；Three-phase damping resistance R1
Three-phase damping resistance R2 is correspondingly connected with identical phase sequence by conducting wire a, b, c with the front of motor of three-phase linkage isolating switch S1
With the front of motor of three-phase linkage isolating switch S2, and conducting wire a, b, c are separately connected the three-phase input end of star-like connection circuit；
Damping resistance R3 is in series on every circuitry phase of star-like connection circuit, the neutral point of star-like connection circuit passes through damping resistance
R4 ground connection；Three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2 takes chain to realize simultaneously on operation logic
Opening/closing movement.
Heretofore described damping resistance R1, damping resistance R2, damping resistance R3 and damping resistance R4 are all made of super large appearance
The high-power nonlinear damping resistor of amount, resistance to compression grade is in 1.5.p.u or more.
The present invention provides a kind of first kind application of substation overvoltage protection circuit, heretofore described overvoltage
Protection circuit is protected for substation bus bar breaker, wherein A1, B1, C1 three-phase end of incoming cables and A2, B2, C2 three-phase leading-out terminal pair
It should be connected across between the end of incoming cables and leading-out terminal of bus breaker.
In the present invention, after substation bus bar breaker open operation and system damping process, three-phase ganged is kept apart
It closes S1 and three-phase linkage isolating switch S2 to open simultaneously, overvoltage protection circuit can be isolated and exit electric system；Work as system
When normal operation, and after bus breaker closing, simultaneously by three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2
It closes, overvoltage protection circuit, which is started to work, to be run, to inhibit the switching overvoltage generated during Operation of Electric Systems, shut off
Overvoltage, resonance overvoltage and single-phase intermittent arc earthing overvoltage etc., to implement to protect to bus breaker, and really
The safe operation of the electrical equipments such as generator, power transformer, high-tension motor is protected；When overvoltage protection circuit is implemented to overhaul
When, three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2 are opened simultaneously, overvoltage protection circuit can be isolated
Exit electric system.
The present invention provides a kind of the second class application of substation's overvoltage protection circuit, and heretofore described overvoltage is anti-
Protection circuit is used for substation's outgoing line interval shorted to earth error protection, wherein A1, B1, C1 three-phase end of incoming cables and A2, B2, C2 three-phase
Leading-out terminal correspondence is connected across between the bus of substation and outgoing line interval ground wire.
In the present invention, after substation's outgoing line interval short trouble and system damping process, three-phase ganged is isolated
Switch S1 and three-phase linkage isolating switch S2 are opened simultaneously, and overvoltage protection circuit can be isolated and be exited electric system, with right
Faulty circuit implements maintenance；When systems are functioning properly, three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2 is same
When close, overvoltage protection circuit is started to work operation, is induced with inhibiting the conversion of energy between electric system energy storage device
Energy oscillation, and further issuable phase-phase, a variety of overvoltage in phase-ground are inhibited；When overvoltage protection circuit is real
When applying maintenance, three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2 are opened simultaneously, it can be by overvoltage protection electricity
Electric system is exited in road isolation.
Compared with prior art, the overvoltage protection circuit designed the present invention is based on each damping resistance is realized to mother
The overvoltage protection of line breaker, and energy in each energy storage device is absorbed in real time in circuit switching, inhibit from source
The concussion of energy can inhibit phase-phase, the various overvoltage effective dampings in phase-ground in extremely low level, can to generator,
The weak isolatings equipment such as power transformer, high-tension motor is entirely capable of playing positive protective effect；At the same time, the present invention is special
Structure design realize facility exit after electrical safety isolation, so as to overhaul of the equipments.
Detailed description of the invention
Fig. 1 is electrical schematic diagram of the invention；
Fig. 2 is the electrical connection schematic diagram that the present invention implements protection to substation bus bar breaker；
Fig. 3 is the electrical connection schematic diagram that the present invention implements protection to substation's outgoing line interval shorted to earth failure.
In figure: 1-three-phase inlet wire lateral circuit, 2-three-phase outlet lateral circuits, 3-star-like connection circuits.
Specific embodiment
Embodiment 1
Referring to Fig. 1, a kind of substation's overvoltage protection circuit includes three-phase inlet wire lateral circuit 1, three-phase outlet lateral circuit 2
With the star-like connection circuit 3 of included neutral point；Three-phase inlet wire lateral circuit 1 is respectively by A1, B1, C1 three-phase end of incoming cables and three-phase ganged
Disconnecting switch S1 and three-phase damping resistance R1 are sequentially connected in series；Three-phase outlet lateral circuit 2 is gone out by A2, B2, C2 three-phase respectively
Line end and three-phase linkage isolating switch S2 and three-phase damping resistance R2 are sequentially connected in series；Three-phase damping resistance R1 is connected with three
The front of motor of dynamic disconnecting switch S1 is correspondingly connected with three-phase damping resistance R2 by conducting wire a, conducting wire b, conducting wire c with identical phase sequence
With the front of motor of three-phase linkage isolating switch S2, and conducting wire a, b, c are separately connected the three-phase input end of star-like connection circuit；
Damping resistance R3 is in series on every circuitry phase of star-like connection circuit, the neutral point O of star-like connection circuit passes through damping electricity
It hinders R4 and is grounded G1；Three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2 takes chain same to realize on operation logic
When opening/closing movement.
Damping resistance R1 described in the present embodiment, damping resistance R2, damping resistance R3 and damping resistance R4 are all made of super large
The high-power nonlinear damping resistor of capacity, resistance to compression grade is in 1.5.p.u or more, i.e., when the busbar voltage of system is 10kV,
The resistance to compression grade of each damping resistance is in 15kV or more；When the busbar voltage of system is 30kV, the resistance to compression of each damping resistance
Grade is in 45kV or more.
Embodiment 2
Referring to fig. 2, the present embodiment is based on embodiment 1, and overvoltage protection circuit described in the present embodiment is disconnected for substation bus bar
The protection of road device；It is equipped with sectionalized busbar W1, W2 in Fig. 2, is sequentially arranged with transformer and bus in the input side of every sectionalized busbar
Breaker, every sectionalized busbar outlet side and be connected to several groups load；A1, B1, C1 three-phase end of incoming cables and A2, B2, C2 tri-
Phase leading-out terminal correspondence is connected across between the end of incoming cables and leading-out terminal of bus breaker.
In the present invention, after substation bus bar breaker open operation and system damping process, three-phase ganged is kept apart
It closes S1 and three-phase linkage isolating switch S2 to open simultaneously, overvoltage protection circuit can be isolated and exit electric system；Work as system
When normal operation, and after bus breaker closing, simultaneously by three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2
It closes, overvoltage protection circuit, which is started to work, to be run, to inhibit the switching overvoltage generated during Operation of Electric Systems, shut off
Overvoltage, resonance overvoltage and single-phase intermittent arc earthing overvoltage etc., to implement to protect to bus breaker, and really
The safe operation of the electrical equipments such as generator, power transformer, high-tension motor is protected；When overvoltage protection circuit is implemented to overhaul
When, three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2 are opened simultaneously, overvoltage protection circuit can be isolated
Exit electric system.
Embodiment 3
Referring to Fig. 3, the present embodiment is based on embodiment 1, and overvoltage protection circuit described in the present embodiment is used between substation's outlet
Every shorted to earth error protection；It is equipped with sectionalized busbar W1, W2 in Fig. 3, is sequentially arranged with change in the input side of every sectionalized busbar
Depressor and bus breaker, every sectionalized busbar outlet side and be connected to several groups load；A1, B1, C1 three-phase end of incoming cables with
A2, B2, C2 three-phase leading-out terminal correspondence are connected across between the sectionalized busbar W1/W2 of substation and outgoing line interval ground wire G2.
In the present invention, after substation's outgoing line interval short trouble and system damping process, three-phase ganged is isolated
Switch S1 and three-phase linkage isolating switch S2 are opened simultaneously, and overvoltage protection circuit can be isolated and be exited electric system, with right
Faulty circuit implements maintenance；When systems are functioning properly, three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2 is same
When close, overvoltage protection circuit is started to work operation, is induced with inhibiting the conversion of energy between electric system energy storage device
Energy oscillation, and further issuable phase-phase, a variety of overvoltage in phase-ground are inhibited；When overvoltage protection circuit is real
When applying maintenance, three-phase linkage isolating switch S1 and three-phase linkage isolating switch S2 are opened simultaneously, it can be by overvoltage protection electricity
Electric system is exited in road isolation.
The above, is only certain embodiments of the present invention, and the present invention is not only restricted to the limitation of above-described embodiment, all foundations
Technical spirit of the invention still falls within technical solution of the present invention to similar modification, variation and replacement made by above-described embodiment
In range.Protection scope of the present invention is only defined by tbe claims.
Claims (4)
1. a kind of substation overvoltage protection circuit, it is characterized in that: including three-phase inlet wire lateral circuit, three-phase outlet lateral circuit
With the star-like connection circuit of included neutral point；Three-phase inlet wire lateral circuit respectively by A1, B1, C1 three-phase end of incoming cables and three-phase ganged every
Pass S1 and three-phase damping resistance R1 is left to be sequentially connected in series；Three-phase outlet lateral circuit is respectively by A2, B2, C2 three-phase leading-out terminal
It is sequentially connected in series with three-phase linkage isolating switch S2 and three-phase damping resistance R2；Three-phase damping resistance R1 and three-phase ganged every
Leave close S1 front of motor by conducting wire a, b, c with identical phase sequence be correspondingly connected with three-phase damping resistance R2 and three-phase ganged every
The front of motor for closing S2 is left, and conducting wire a, b, c are separately connected the three-phase input end of star-like connection circuit；In star-like connection electricity
Damping resistance R3 is in series on every circuitry phase on road, the neutral point of star-like connection circuit is grounded by damping resistance R4；Three-phase
Linkage disconnector S1 and three-phase linkage isolating switch S2 takes chain to realize opening/closing movement simultaneously on operation logic.
2. a kind of substation overvoltage protection circuit according to claim 1, it is characterized in that: the damping resistance R1,
Damping resistance R2, damping resistance R3 and damping resistance R4 are all made of the high-power nonlinear damping resistor of vast capacity, resistance to compression etc.
Grade is in 1.5.p.u or more.
3. the application of a kind of substation overvoltage protection circuit according to claim 1, it is characterized in that: the overvoltage
Protection circuit is protected for substation bus bar breaker, wherein A1, B1, C1 three-phase end of incoming cables and A2, B2, C2 three-phase leading-out terminal pair
It should be connected across between the end of incoming cables and leading-out terminal of bus breaker.
4. the application of a kind of substation overvoltage protection circuit according to claim 1, it is characterized in that: the overvoltage
Protection circuit is used for substation's outgoing line interval shorted to earth error protection, wherein A1, B1, C1 three-phase end of incoming cables and A2, B2, C2 tri-
Phase leading-out terminal correspondence is connected across between the bus of substation and outgoing line interval ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453079.8A CN109494701A (en) | 2018-11-30 | 2018-11-30 | A kind of substation overvoltage protection circuit and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811453079.8A CN109494701A (en) | 2018-11-30 | 2018-11-30 | A kind of substation overvoltage protection circuit and its application |
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| Publication Number | Publication Date |
|---|---|
| CN109494701A true CN109494701A (en) | 2019-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811453079.8A Withdrawn CN109494701A (en) | 2018-11-30 | 2018-11-30 | A kind of substation overvoltage protection circuit and its application |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525434A (en) * | 2020-04-15 | 2020-08-11 | 国网电力科学研究院武汉南瑞有限责任公司 | Overvoltage protection PT cabinet for substation |
| 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 |
Citations (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 |
| CN208890368U (en) * | 2018-11-30 | 2019-05-21 | 国网湖北省电力有限公司黄石供电公司 | A kind of substation's overvoltage protection circuit |
-
2018
- 2018-11-30 CN CN201811453079.8A patent/CN109494701A/en not_active Withdrawn
Patent Citations (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 |
| CN208890368U (en) * | 2018-11-30 | 2019-05-21 | 国网湖北省电力有限公司黄石供电公司 | A kind of substation's overvoltage protection circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525434A (en) * | 2020-04-15 | 2020-08-11 | 国网电力科学研究院武汉南瑞有限责任公司 | Overvoltage protection PT cabinet for substation |
| 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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Application publication date: 20190319 |