CN102231522B - Power flow controller with failure current limiting function - Google Patents

Power flow controller with failure current limiting function Download PDF

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Publication number
CN102231522B
CN102231522B CN2011101845764A CN201110184576A CN102231522B CN 102231522 B CN102231522 B CN 102231522B CN 2011101845764 A CN2011101845764 A CN 2011101845764A CN 201110184576 A CN201110184576 A CN 201110184576A CN 102231522 B CN102231522 B CN 102231522B
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China
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phase
switch
current
transformer
pressure
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CN2011101845764A
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Chinese (zh)
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CN102231522A (en
Inventor
郭文勇
肖立业
戴少涛
张志丰
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中国科学院电工研究所
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40Arrangements for reducing harmonics

Abstract

The invention discloses a power flow controller with a failure current limiting function. When a power grid does not fail, the power flow controller controls current on a current limiting inductor by a current transformer and regulates equivalent impedance flowing into the power grid, thereby controlling the transmission power of the power grid, and compensates the harmonic waves and reactive power of transmission current by the current transformer; and when the power grid fails, the current limiting inductor is directly connected in series to the power grid to function in failure current limiting, and simultaneously, the power flow controller also can control the current transformer to discharge the current limiting inductor and control the current of the current limiting inductor to better current limiting effects, and can perform steady current limiting by a current limiting bypass, with the current limiting inductor, of a protective circuit to better failure current limiting effects.

Description

A kind of flow controller with failure current limit function
Technical field
The present invention relates to a kind of flow controller of failure current limit function.
Background technology
Trend is controlled and failure current limit is the two large core technical barriers that power transmission network faces.Flow controller mainly contains two types at present, a kind of is by changing the equiva lent impedance of circuit, US Patent No. 00542495 as shown in Figure 1 " control of power transmission line trend ", another kind is to realize by seal in a controlled voltage source from circuit, patent WO 9605642A1 as shown in Figure 2 " general rapid tidal current controller ".These two kinds of flow controllers can both be controlled flowing of grid power effectively, but helpless to electric network fault, and the short trouble of electrical network even can produce destructive destruction to these devices itself.Chinese patent 200620069650.2 shown in Figure 3 " THE UPFC with short-circuit current-limiting function " adopts the variable impedance transformer of overcurrent magnetic circuit saturation characteristic to realize failure current limit; but this circuit can't be realized might causing the damage of the power electronic device of device own at over-current shock to installing the protection of itself.
Summary of the invention
In order to overcome the deficiency of prior art, the invention provides a kind of flow controller with failure current limit function.When the present invention does not break down at electrical network, regulate by the electric current that current transformer is controlled on current-limiting inductance the equiva lent impedance that seals in electrical network, thereby control the size of electrical network through-put power, and compensate the humorous reactive power that involves of transmission current by current transformer; When electrical network breaks down; current-limiting inductance directly seals in electrical network; play the effect of failure current limit; simultaneously can also control current transformer discharges to current-limiting inductance; control the size of current-limiting inductance electric current; improve the effect of current limliting, and can carry out the stable state current limliting by the current limliting branch road at protective circuit bypass current-limiting inductance place, improve the effect of failure current limit.
The present invention has following two kinds of basic structure forms:
1, to have the structure of flow controller of failure current limit function as follows in the present invention: voltage source converter and three-phase filter circuit thereof, chopper and triphase step-down transformer form power regulating system in parallel.The three-phase alternating current pressure side of voltage source converter is connected with the low-pressure side of triphase step-down transformer by filter circuit, and the high-pressure side of triphase step-down transformer is connected with the first three phase mains; Voltage source converter direct current pressure side is with in parallel with the direct current pressure side of chopper after direct current is connected Capacitance parallel connection, and the alternating current pressure side of chopper is mutually connected with the direct current pressure side of current-limiting inductance and three-phase diode rectifier and formed the loop; The three-phase alternating current pressure side of three-phase diode rectifier is connected with an end of the first switch, the 3rd switch and the 5th switch respectively, the other end of the first switch, the 3rd switch and the 5th switch is connected with an end of the low-pressure side of the first single-phase transformer, the second single-phase transformer and the 3rd single-phase transformer respectively, and the other end of the low-pressure side of the first single-phase transformer, the second single-phase transformer and the 3rd single-phase transformer interconnects; Second switch and the series connection of the first resistance form the first bypass branch, and the first bypass branch is in parallel with the two ends of the low-pressure side of the first single-phase transformer; The 4th switch and the series connection of the second resistance form the second bypass branch, and the second bypass branch is in parallel with the two ends of the low-pressure side of the second single-phase transformer; The 6th switch and the series connection of the 3rd resistance form the 3rd bypass branch, and the 3rd bypass branch is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer; One end of the first series compensation capacitance, the second series compensation capacitance and the 3rd series compensation capacitance is connected respectively with the three-phase of the second three phase mains respectively, and the other end of the first series compensation capacitance, the second series compensation capacitance and the 3rd series compensation capacitance is connected with the on high-tension side end of the first single-phase transformer, the second single-phase transformer and the 3rd single-phase transformer respectively; The first single-phase transformer, the second single-phase transformer and the 3rd on high-tension side other end of single-phase transformer are connected respectively with the three-phase of the first three phase mains.three-phase diode rectifier or replace with three single-phase diode rectifiers, the direct current pressure side of three single-phase diode rectifiers interconnects, and connect with alternating current pressure side and the current-limiting inductance of chopper, form current circuit, one end of the alternating current pressure side of three single-phase diode rectifiers respectively with the first switch, one end of the 3rd switch and the 5th switch is connected, the other end of the alternating current pressure side of three single-phase diode rectifiers respectively with the first single-phase transformer, the second single-phase transformer is connected with an end of the 3rd single-phase transformer low-pressure side, the first switch, the other end of the 3rd switch and the 5th switch and the first single-phase transformer, the second single-phase transformer is connected with the other end of the 3rd single-phase transformer low-pressure side, the connected mode of remaining circuit is constant.The first bypass branch, the second bypass branch and the 3rd bypass branch or be parallel to respectively the high-pressure side of the first single-phase transformer, the second single-phase transformer and the 3rd single-phase transformer.Not needing to carry out the occasion that trend is controlled, cancel second switch, the 4th switch, the 6th switch, the first compensation condenser, the second compensation condenser and the 3rd compensation condenser.Described power regulating system in parallel or the identical power regulating system in parallel of available a plurality of structure combine, and the high-pressure side of the triphase step-down transformer of described combination power regulating system in parallel is parallel with one another, and the ac voltage output of chopper is connected mutually.
the control method with failure current limit function flow controller to this version can be carried out for following two kinds of operating states respectively when the needs trend is controlled: (1) normal operating conditions: this moment the first switch, the 3rd switch and the 5th switch are closed, second switch, the 4th switch and the 6th switch disconnect, voltage source converter and chopper cooperatively interact, by controlling the electric current on current-limiting inductance, control the amplitude of the line current between the first three phase mains and the second three phase mains, thereby control the size from the first three phase mains to the flow of power the second three phase mains, voltage source converter is coordinating chopper to control on current-limiting inductance in electric current, compensation flows to harmonic current and the reactive power of the second three phase mains from the first three phase mains, (2) failure current limit state: after electrical network is short-circuited fault, current-limiting inductance is automatically connected into power network line, increased system impedance, thereby reduced the electrical network overcurrent, voltage source converter and chopper coordinate simultaneously, to the current-limiting inductance current discharge, to strengthen current limitation effect, when the current value overrate of current-limiting inductance, the first switch, the 3rd switch and the 5th switch are disconnected, second switch, the 4th switch and the 6th switch are closed, and line voltage distribution will be no longer to the current-limiting inductance charging, by the resistance of bypass branch, electrical network are carried out failure current limit.
can carry out for following two kinds of operating states respectively when not needing trend to control the control method with failure current limit function flow controller of this version: (1) normal operating conditions: this moment the first switch, the 3rd switch and the 5th switch are closed, voltage source converter and chopper cooperatively interact, the amplitude that the amplitude of the electric current of current-limiting inductance is controlled at line current multiply by three values more than single-phase transformer high-low pressure no-load voltage ratio, the series circuit that be made of three single-phase transformers and diode rectifier this moment does not exert an influence to electrical network, voltage source converter is coordinating chopper to control on current-limiting inductance in electric current, compensation flows to the harmonic current of the second three phase mains from the first three phase mains, the fluctuation of active power and reactive power, (2) failure current limit state: after electrical network is short-circuited fault, current-limiting inductance is automatically connected into power network line, increased system impedance, thereby reduced the electrical network overcurrent, voltage source converter and chopper coordinate simultaneously, to the current-limiting inductance current discharge, strengthening current limitation effect, when the current value overrate of current-limiting inductance, the first switch, the 3rd switch and the 5th switch are disconnected, line voltage distribution will be no longer to the current-limiting inductance charging, by the resistance of bypass branch, electrical network is carried out failure current limit.
2, to have the structure of flow controller of failure current limit function as follows in the present invention: current source converter and three-phase filter circuit thereof and triphase step-down transformer form power regulating system in parallel; The three-phase alternating current end of current source converter is connected with the low-pressure side of triphase step-down transformer by filter circuit, and the high-pressure side of triphase step-down transformer is connected with the first three phase mains; Current source converter direct current end is mutually connected with the direct current pressure side of current-limiting inductance and three-phase diode rectifier and is formed the loop; The three-phase alternating current pressure side of three-phase diode rectifier is connected with an end of the first switch, the 3rd switch and the 5th switch respectively, the other end of the first switch, the 3rd switch and the 5th switch is connected with an end of the low-pressure side of the first single-phase transformer, the second single-phase transformer and the 3rd single-phase transformer respectively, and the other end of the low-pressure side of the first single-phase transformer, the second single-phase transformer and the 3rd single-phase transformer interconnects; Second switch and the series connection of the first resistance form the first bypass branch, and the first bypass branch is in parallel with the two ends of the low-pressure side of the first single-phase transformer; The 4th switch and the series connection of the second resistance form the second bypass branch, and the second bypass branch is in parallel with the two ends of the low-pressure side of the second single-phase transformer; The 6th switch and the series connection of the 3rd resistance form the 3rd bypass branch, and the 3rd bypass branch is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer; One end of the first series compensation capacitance, the second series compensation capacitance and the 3rd series compensation capacitance is connected respectively with the three-phase of the second three phase mains respectively, and the other end of the first series compensation capacitance, the second series compensation capacitance and the 3rd series compensation capacitance is connected with the on high-tension side end of the first single-phase transformer, the second single-phase transformer and the 3rd single-phase transformer respectively; The first single-phase transformer, the second single-phase transformer and the 3rd on high-tension side other end of single-phase transformer are connected respectively with the three-phase of the first three phase mains.three-phase diode rectifier or replace with three single-phase diode rectifiers, the direct current pressure side of three single-phase diode rectifiers interconnects, and connect with direct current end and the current-limiting inductance of current source converter, form current circuit, one end of the alternating current pressure side of three single-phase diode rectifiers respectively with the first switch, one end of the 3rd switch and the 5th switch is connected, the other end of the alternating current pressure side of three single-phase diode rectifiers respectively with the first single-phase transformer, the second single-phase transformer is connected with an end of the 3rd single-phase transformer low-pressure side, the first switch, the other end of the 3rd switch and the 5th switch and the first single-phase transformer, the second single-phase transformer is connected with the other end of the 3rd single-phase transformer low-pressure side, the connected mode of remaining circuit is constant.The first bypass branch, the second bypass branch and the 3rd bypass branch or be parallel to respectively the high-pressure side of the first single-phase transformer, the second single-phase transformer and the 3rd single-phase transformer; Not needing to carry out the occasion that trend is controlled, cancel second switch, the 4th switch, the 6th switch, the first compensation condenser, the second compensation condenser and the 3rd compensation condenser.Described power regulating system in parallel or the identical power regulating system in parallel of available a plurality of structure combine, the high-pressure side of the triphase step-down transformer of described combination power regulating system in parallel is parallel with one another, and the direct current end of current source converter is connected mutually.
the control method with failure current limit function flow controller to this version can be carried out for following two kinds of operating states respectively when the needs trend is controlled: 1) normal operating conditions: this moment the first switch, the 3rd switch and the 5th switch are closed, second switch, the 4th switch and the 6th switch disconnect, current source converter is by controlling the electric current on current-limiting inductance, control the amplitude of the line current between the first three phase mains and the second three phase mains, thereby control the size from the first three phase mains to the flow of power the second three phase mains, current source converter is on controlling current-limiting inductance in electric current, compensation flows to harmonic current and the reactive power of the second three phase mains from the first three phase mains, (2) failure current limit state: after electrical network is short-circuited fault, current-limiting inductance is automatically connected into power network line, increased system impedance, thereby reduced the electrical network overcurrent, current source converter is to the current-limiting inductance current discharge simultaneously, to strengthen current limitation effect, when the current value overrate of current-limiting inductance, the first switch, the 3rd switch and the 5th switch are disconnected, second switch, the 4th switch and the 6th switch are closed, line voltage distribution will be no longer to the current-limiting inductance charging, and the resistance of bypass branch carries out failure current limit to electrical network.
can carry out for following two kinds of operating states respectively when not needing trend to control the control method with failure current limit function flow controller of this version: (1) normal operating conditions: this moment the first switch, the 3rd switch and the 5th switch are closed, current source converter multiply by three values more than single-phase transformer high-low pressure no-load voltage ratio with the amplitude that the amplitude of the electric current of current-limiting inductance is controlled at line current, the series circuit that be made of three single-phase transformers and diode rectifier this moment does not exert an influence to electrical network, current source converter is on controlling current-limiting inductance in electric current, compensation flows to the harmonic current of the second three phase mains from the first three phase mains, the fluctuation of active power and reactive power, (2) failure current limit state: after electrical network is short-circuited fault, current-limiting inductance is automatically connected into power network line, increased system impedance, thereby reduced the electrical network overcurrent, current source converter is to the current-limiting inductance current discharge, to strengthen current limitation effect simultaneously, when the current value overrate of current-limiting inductance, the first switch, the 3rd switch and the 5th switch are disconnected, and line voltage distribution will be no longer to the current-limiting inductance charging, and the resistance of bypass branch carries out failure current limit to electrical network.
Description of drawings
Fig. 1 is the topology diagram of US Patent No. 00542495 " control of power transmission line trend ";
Fig. 2 is the control block diagram of patent WO 9605642A1 " general rapid tidal current controller ";
Fig. 3 is the control block diagram of Chinese patent 200620069650.2 " THE UPFC with short-circuit current-limiting function ";
Fig. 4-Fig. 7 is the topology diagram of embodiment of the present invention 1-4.
Embodiment
Further illustrate the present invention below in conjunction with the drawings and specific embodiments.
Fig. 4 is the topological structure of embodiments of the invention 1.As shown in Figure 4, the structure of the embodiment of the present invention 1 is as follows: voltage source converter VSC and three-phase filter circuit thereof, chopper chopper and triphase step-down transformer Tr form power regulating system PCS in parallel; The three-phase alternating current pressure side of voltage source converter VSC is connected by the low-pressure side of filter circuit with triphase step-down transformer Tr, and the high-pressure side of triphase step-down transformer Tr is connected with the first three phase mains Us; Voltage source converter VSC direct current pressure side is connected after the capacitor C parallel connection in parallel with the direct current pressure side of chopper chopper with direct current, the alternating current pressure side of chopper chopper is mutually connected with the direct current pressure side of current-limiting inductance Ls and three-phase diode rectifier Rf and formed the loop; The three-phase alternating current pressure side of three-phase diode rectifier Rf is connected with the first switch S 1, the 3rd switch S 3 and an end of the 5th switch S 5 respectively, the other end of the first switch S 1, the 3rd switch S 3 and the 5th switch S 5 is connected with an end of the low-pressure side of the first single-phase transformer Tr1, the second single-phase transformer Tr2 and the 3rd single-phase transformer Tr3 respectively, and the other end of the low-pressure side of the first single-phase transformer Tr1, the second single-phase transformer Tr2 and the 3rd single-phase transformer Tr3 interconnects; Second switch S2 and the first resistance R 1 series connection form the first bypass branch P1, and the first bypass branch P1 is in parallel with the two ends of the low-pressure side of the first single-phase transformer Tr1; The 4th switch S 4 and the second resistance R 2 series connection form the second bypass branch P2, and the second bypass branch P2 is in parallel with the two ends of the low-pressure side of the second single-phase transformer Tr2; The 6th switch S 6 and the 3rd resistance R 3 series connection form the 3rd bypass branch P3, and the 3rd bypass branch P3 is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer Tr3; The end of the first series compensation capacitance C1, the second series compensation capacitance C2 and the 3rd series compensation capacitance C3 is connected respectively with the three-phase of the second three phase mains Ug respectively, and the other end of the first series compensation capacitance C1, the second series compensation capacitance C2 and the 3rd series compensation capacitance C3 is connected with the 3rd on high-tension side end of single-phase transformer Tr3 with the first single-phase transformer Tr1, the second single-phase transformer Tr2 respectively; The first single-phase transformer Tr1, the second single-phase transformer Tr2 are connected respectively with the three-phase of the first three phase mains Us with the 3rd on high-tension side other end of single-phase transformer Tr3.
Fig. 5 is the topological structure of embodiments of the invention 2.as shown in Figure 5, the structure of the embodiment of the present invention 2 is as follows: voltage source converter VSC and three-phase filter circuit thereof, chopper chopper and triphase step-down transformer Tr form power regulating system PCS in parallel, the three-phase alternating current pressure side of voltage source converter VSC is connected by the low-pressure side of filter circuit with triphase step-down transformer Tr, and the high-pressure side of triphase step-down transformer Tr is connected with the first three phase mains Us, voltage source converter VSC direct current pressure side is connected after the capacitor C parallel connection in parallel with the direct current pressure side of chopper chopper with direct current, the alternating current pressure side of chopper chopper is mutually connected with the direct current pressure side of current-limiting inductance Ls, the first single-phase diode rectifier Rf1, the second single-phase diode rectifier Rf2 and the 3rd single-phase diode rectifier Rf3 and formed the loop, three single-phase diode rectifier Rf1, one end of the alternating current pressure side of Rf2 and Rf3 respectively with the first switch S 1, the 3rd switch S 3 is connected with an end of the 5th switch S 3, three single-phase diode rectifier Rf1, the other end of the alternating current pressure side of Rf2 and Rf3 respectively with the first single-phase transformer Tr1, the second single-phase transformer Tr2 is connected with an end of the 3rd single-phase transformer Tr3 low-pressure side, the first switch S 1, the other end of the 3rd switch S 3 and the 5th switch S 5 respectively with the first single-phase transformer Tr1, the second single-phase transformer Tr2 is connected with the other end of the 3rd single-phase transformer Tr3 low-pressure side, second switch S2 and the first resistance R 1 series connection form the first bypass branch P1, and the first bypass branch P1 is in parallel with the two ends of the low-pressure side of the first single-phase transformer Tr1, the 4th switch S 4 and the second resistance R 2 series connection form the second bypass branch P2, and the second bypass branch P2 is in parallel with the two ends of the low-pressure side of the second single-phase transformer Tr2, the 6th switch S 6 and the 3rd resistance R 3 series connection form the 3rd bypass branch P3, and the 3rd bypass branch P3 is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer Tr3, the end of the first series compensation capacitance C1, the second series compensation capacitance C2 and the 3rd series compensation capacitance C3 is connected respectively with the three-phase of the second three phase mains Ug respectively, and the other end of the first series compensation capacitance C1, the second series compensation capacitance C2 and the 3rd series compensation capacitance C3 is connected with the 3rd on high-tension side end of single-phase transformer Tr3 with the first single-phase transformer Tr1, the second single-phase transformer Tr2 respectively, the first single-phase transformer Tr1, the second single-phase transformer Tr2 are connected respectively with the three-phase of the first three phase mains Us with the 3rd on high-tension side other end of single-phase transformer Tr3.
can have trend and control two kinds of operating states of the fault current limiter of function and control respectively for described the control of Fig. 4 and embodiment 1 shown in Figure 5 and embodiment 2: 1, normal operating conditions: this moment the first switch S 1, the 3rd switch S 3 and the 5th switch S 5 closures, second switch S2, the 4th switch S 4 and the 6th switch S 6 disconnect, voltage source converter VSC and chopper chopper cooperatively interact, by controlling the electric current on current-limiting inductance Ls, control the amplitude of the line current between the first three phase mains Us and the second three phase mains Ug, thereby control the size from the first three phase mains Us to the flow of power the second three phase mains Ug, voltage source converter VSC is coordinating chopper chopper to control on current-limiting inductance Ls in electric current, compensation flows to harmonic current and the reactive power of the second three phase mains Ug from the first three phase mains Us, 2, failure current limit state: after electrical network is short-circuited fault, current-limiting inductance Ls is automatically connected into power network line, increased system impedance, thereby reduced the electrical network overcurrent, voltage source converter VSC and chopper chopper coordinate simultaneously, to current-limiting inductance Ls current discharge, to strengthen current limitation effect, when the current value overrate of current-limiting inductance Ls, with the first switch S 1, the 3rd switch S 3 and the 5th switch S 5 disconnect, second switch S2, the 4th switch S 4 and the 6th switch S 6 closures, line voltage distribution will no longer charge to current-limiting inductance, resistance by bypass branch carries out failure current limit to electrical network.
Fig. 6 is the topological structure of embodiments of the invention 3.As shown in Figure 6, the structure of the embodiment of the present invention 3 is as follows: current source converter CSC and three-phase filter circuit thereof and triphase step-down transformer Tr form power regulating system PCS in parallel; The three-phase alternating current end of current source converter CSC is connected by the low-pressure side of filter circuit with triphase step-down transformer Tr, and the high-pressure side of triphase step-down transformer Tr is connected with the first three phase mains Us; Three-phase current source current transformer CSC direct current end is mutually connected with the direct current pressure side of current-limiting inductance Ls and three-phase diode rectifier Rf and is formed the loop; The three-phase alternating current pressure side of three-phase diode rectifier Rf is connected with the first switch S 1, the 3rd switch S 3 and an end of the 5th switch S 5 respectively, the other end of the first switch S 1, the 3rd switch S 3 and the 5th switch S 5 is connected with an end of the low-pressure side of the first single-phase transformer Tr1, the second single-phase transformer Tr2 and the 3rd single-phase transformer Tr3 respectively, and the other end of the low-pressure side of the first single-phase transformer Tr1, the second single-phase transformer Tr2 and the 3rd single-phase transformer Tr3 interconnects; Second switch S2 and the first resistance R 1 series connection form the first bypass branch P1, and the first bypass branch P1 is in parallel with the two ends of the low-pressure side of the first single-phase transformer Tr1; The 4th switch S 4 and the second resistance R 2 series connection form the second bypass branch P2, and the second bypass branch P2 is in parallel with the two ends of the low-pressure side of the second single-phase transformer Tr2; The 6th switch S 6 and the 3rd resistance R 3 series connection form the 3rd bypass branch P3, and the 3rd bypass branch P3 is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer Tr3; The end of the first series compensation capacitance C1, the second series compensation capacitance C2 and the 3rd series compensation capacitance C3 is connected respectively with the three-phase of the second three phase mains Ug respectively, and the other end of the first series compensation capacitance C1, the second series compensation capacitance C2 and the 3rd series compensation capacitance C3 is connected with the 3rd on high-tension side end of single-phase transformer Tr3 with the first single-phase transformer Tr1, the second single-phase transformer Tr2 respectively; The first single-phase transformer Tr1, the second single-phase transformer Tr2 are connected respectively with the three-phase of the first three phase mains Us with the 3rd on high-tension side other end of single-phase transformer Tr3.
Fig. 7 is the topological structure of embodiments of the invention 4.as shown in Figure 7, the structure of the embodiment of the present invention 4 is as follows: current source converter CSC and three-phase filter circuit thereof and triphase step-down transformer form power regulating system PCS in parallel, the three-phase alternating current end of current source converter CSC is connected by the low-pressure side of filter circuit with triphase step-down transformer Tr, and the high-pressure side of triphase step-down transformer Tr is connected with the first three phase mains Us, current source converter CSC direct current end is mutually connected with the direct current pressure side of current-limiting inductance Ls, the first single-phase diode rectifier Rf1, the second single-phase diode rectifier Rf2 and the 3rd single-phase diode rectifier Rf3 and is formed the loop, three single-phase diode rectifier Rf1, one end of the alternating current pressure side of Rf2 and Rf3 respectively with the first switch S 1, the 3rd switch S 3 is connected with an end of the 5th switch S 3, three single-phase diode rectifier Rf1, the other end of the alternating current pressure side of Rf2 and Rf3 respectively with the first single-phase transformer Tr1, the second single-phase transformer Tr2 is connected with an end of the 3rd single-phase transformer Tr3 low-pressure side, the first switch S 1, the other end of the 3rd switch S 3 and the 5th switch S 3 respectively with the first single-phase transformer Tr1, the second single-phase transformer Tr2 is connected with the other end of the 3rd single-phase transformer Tr3 low-pressure side, second switch S2 and the first resistance R 1 series connection form the first bypass branch P1, and the first bypass branch P1 is in parallel with the two ends of the low-pressure side of the first single-phase transformer Tr1, the 4th switch S 4 and the second resistance R 2 series connection form the second bypass branch P2, and the second bypass branch P2 is in parallel with the two ends of the low-pressure side of the second single-phase transformer Tr2, the 6th switch S 6 and the 3rd resistance R 3 series connection form the 3rd bypass branch P3, and the 3rd bypass branch P3 is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer Tr3, the end of the first series compensation capacitance C1, the second series compensation capacitance C2 and the 3rd series compensation capacitance C3 is connected respectively with the three-phase of the second three phase mains Ug respectively, and the other end of the first series compensation capacitance C1, the second series compensation capacitance C2 and the 3rd series compensation capacitance C3 is connected with the 3rd on high-tension side end of single-phase transformer Tr3 with the first single-phase transformer Tr1, the second single-phase transformer Tr2 respectively, the first single-phase transformer Tr1, the second single-phase transformer Tr2 are connected respectively with the three-phase of the first three phase mains Us with the 3rd on high-tension side other end of single-phase transformer Tr3.
can have trend and control two kinds of operating states of the fault current limiter of function and control respectively for described the control method of Fig. 6 and embodiment 3 shown in Figure 7 and embodiment 4: 1, normal operating conditions: this moment the first switch S 1, the 3rd switch S 3 and the 5th switch S 5 closures, second switch S2, the 4th switch S 4 and the 6th switch S 6 disconnect, current source converter CSC is by controlling the electric current on current-limiting inductance Ls, control the amplitude of the line current between the first three phase mains Us and the second three phase mains Ug, thereby control the size from the first three phase mains Us to the flow of power the second three phase mains Ug, current source converter CSC is on controlling current-limiting inductance Ls in electric current, compensation flows to harmonic current and the reactive power of the second three phase mains Ug from the first three phase mains Us, 2 failure current limit states: after electrical network is short-circuited fault, current-limiting inductance Ls is automatically connected into power network line, increased system impedance, thereby reduced the electrical network overcurrent, current source converter CSC is to current-limiting inductance Ls current discharge simultaneously, to strengthen current limitation effect, when the current value overrate of current-limiting inductance Ls, the first switch S 1, the 3rd switch S 3 and the 5th switch S 5 are disconnected, second switch S2, the 4th switch S 4 and the 6th switch S 6 closures, line voltage distribution will be no longer to the current-limiting inductance charging, and the resistance of bypass branch carries out failure current limit to electrical network.
For 4 embodiment shown in Fig. 4,5,6,7, described the first bypass branch P1, the second bypass branch P2 and the 3rd bypass branch P3 or be parallel to respectively the high-pressure side of the first single-phase transformer Tr1, the second single-phase transformer Tr2 and the 3rd single-phase transformer Tr1.Not needing to carry out the occasion that trend is controlled, cancel second switch S2, the 4th switch S 4, the 6th switch S 6, the first building-out capacitor C1, the second building-out capacitor C2 and the 3rd building-out capacitor C3; Described power regulating system in parallel or the identical power regulating system in parallel of available a plurality of structure combine, the high-pressure side of the described triphase step-down transformer that is combined power regulating system is parallel with one another, and the alternating current pressure side of chopper or the direct current end of current source converter are connected mutually.control respectively for two kinds of operating states of described flow controller need not the occasion that trend controls: (1) normal operating conditions: this moment the first switch S 1, the 3rd switch S 3 and the 5th switch S 5 closures, voltage source converter VSC and chopper chopper cooperatively interact (or separately by current source converter CSC), the amplitude that the amplitude of the electric current of current-limiting inductance Ls is controlled at line current multiply by three single-phase transformer Tr1, the value that Tr2 and Tr3 high-low pressure no-load voltage ratio are above, this moment is by three single-phase transformer Tr1, Tr2 and Tr3 and diode rectifier Rf1, Rf2, the series circuit that Rf3 or Rf consist of does not exert an influence to electrical network, voltage source converter VSC is coordinating chopper chopper to control on current-limiting inductance Ls in electric current, compensation flows to the harmonic current of the second three phase mains Ug from the first three phase mains Us, the fluctuation of active power and reactive power, (2) failure current limit state: after electrical network is short-circuited fault, current-limiting inductance Ls is automatically connected into power network line, increased system impedance, thereby reduced the electrical network overcurrent, voltage source converter VSC and chopper chopper coordinate (or separately by current source converter CSC) simultaneously, to current-limiting inductance Ls current discharge, to strengthen current limitation effect, when the current value overrate of current-limiting inductance Ls, with the first switch S 1, the 3rd switch S 3 and the 5th switch S 5 disconnect, line voltage distribution will no longer charge to current-limiting inductance, resistance by bypass branch carries out failure current limit to electrical network.

Claims (8)

1. flow controller with failure current limit function, it is characterized in that in described flow controller: voltage source converter (VSC) and three-phase filter circuit thereof, chopper (chopper) and triphase step-down transformer (Tr) form power regulating system in parallel (PCS); The three-phase alternating current pressure side of voltage source converter (VSC) is connected by the low-pressure side of three-phase filter circuit with triphase step-down transformer (Tr), and the high-pressure side of triphase step-down transformer (Tr) is connected with the first three phase mains (Us); Voltage source converter (VSC) direct current pressure side is connected electric capacity (C) with direct current in parallel rear in parallel with the direct current pressure side of chopper (chopper), and the alternating current pressure side of chopper (chopper) is mutually connected with the direct current pressure side of current-limiting inductance (Ls) and three-phase diode rectifier (Rf) and formed the loop; The three-phase alternating current pressure side of three-phase diode rectifier (Rf) is connected with the first switch (S1), the 3rd switch (S3) and an end of the 5th switch (S5) respectively, the other end of the first switch (S1), the 3rd switch (S3) and the 5th switch (S5) is connected with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and an end of the low-pressure side of the 3rd single-phase transformer (Tr3) respectively, and the other end of the low-pressure side of the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the 3rd single-phase transformer (Tr3) interconnects; Second switch (S2) and the first resistance (R1) series connection form the first bypass branch (P1), and the first bypass branch (P1) is in parallel with the two ends of the low-pressure side of the first single-phase transformer (Tr1); The 4th switch (S4) and the second resistance (R2) series connection form the second bypass branch (P2), and the second bypass branch (P2) is in parallel with the two ends of the low-pressure side of the second single-phase transformer (Tr2); The 6th switch (S6) and the 3rd resistance (R3) series connection form the 3rd bypass branch (P3), and the 3rd bypass branch (P3) is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer (Tr3); One end of the first series compensation capacitance (C1), the second series compensation capacitance (C2) and the 3rd series compensation capacitance (C3) is connected respectively with the three-phase of the second three phase mains (Ug) respectively, and the other end of the first series compensation capacitance (C1), the second series compensation capacitance (C2) and the 3rd series compensation capacitance (C3) is connected with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the on high-tension side end of the 3rd single-phase transformer (Tr3) respectively; The first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the on high-tension side other end of the 3rd single-phase transformer (Tr3) are connected respectively with the three-phase of the first three phase mains (Us).
2. flow controller with failure current limit function, it is characterized in that in described flow controller: voltage source converter (VSC) and three-phase filter circuit thereof, chopper (chopper) and triphase step-down transformer (Tr) form power regulating system in parallel (PCS), the three-phase alternating current pressure side of voltage source converter (VSC) is connected by the low-pressure side of filter circuit with triphase step-down transformer (Tr), and the high-pressure side of triphase step-down transformer (Tr) is connected with the first three phase mains (Us), voltage source converter (VSC) direct current pressure side is connected electric capacity (C) with direct current in parallel rear in parallel with the direct current pressure side of chopper (chopper), and the alternating current pressure side of chopper (chopper) is mutually connected with the direct current pressure side of current-limiting inductance (Ls), the first single-phase diode rectifier (Rf1), the second single-phase diode rectifier (Rf2) and the 3rd single-phase diode rectifier (Rf3) and formed the loop, three single-phase diode rectifier (Rf1, Rf2, one end of alternating current pressure side Rf3) respectively with the first switch (S1), the 3rd switch (S3) is connected with an end of the 5th switch (S5), three single-phase diode rectifier (Rf1, Rf2, the other end of alternating current pressure side f3) respectively with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) is connected with an end of the 3rd single-phase transformer (Tr3) low-pressure side, the first switch (S1), the other end of the 3rd switch (S3) and the 5th switch (S5) respectively with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) is connected with the other end of the 3rd single-phase transformer (Tr3) low-pressure side, second switch (S2) and the first resistance (R1) series connection form the first bypass branch (P1), and the first bypass branch (P1) is in parallel with the two ends of the low-pressure side of the first single-phase transformer (Tr1), the 4th switch (S4) and the second resistance (R2) series connection form the second bypass branch (P2), and the second bypass branch (P2) is in parallel with the two ends of the low-pressure side of the second single-phase transformer (Tr2), the 6th switch (S6) and the 3rd resistance (R3) series connection form the 3rd bypass branch (P3), and the 3rd bypass branch (P3) is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer (Tr3), one end of the first series compensation capacitance (C1), the second series compensation capacitance (C2) and the 3rd series compensation capacitance (C3) is connected respectively with the three-phase of the second three phase mains (Ug) respectively, and the other end of the first series compensation capacitance (C1), the second series compensation capacitance (C2) and the 3rd series compensation capacitance (C3) is connected with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the on high-tension side end of the 3rd single-phase transformer (Tr3) respectively, the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the on high-tension side other end of the 3rd single-phase transformer (Tr3) are connected respectively with the three-phase of the first three phase mains (Us).
3. the flow controller with failure current limit function according to claim 1 and 2, it is characterized in that the identical power regulating system described in parallel (PCS) of a plurality of structures forms combination power regulating system in parallel, the high-pressure side of the triphase step-down transformer of described combination power regulating system in parallel is parallel with one another, and the ac voltage output of chopper is connected mutually.
4. the flow controller with failure current limit function according to claim 1 and 2, it is characterized in that controlling respectively for two kinds of operating states of described flow controller: (1) normal operating conditions: this moment the first switch (S1), the 3rd switch (S3) and the 5th switch (S5) closure, second switch (S2), the 4th switch (S4) and the 6th switch (S6) disconnect, voltage source converter (VSC) and chopper (chopper) cooperatively interact, by controlling the electric current on current-limiting inductance (Ls), control the amplitude of the line current between the first three phase mains (Us) and the second three phase mains (Ug), thereby control the size from the first three phase mains (Us) to the flow of power the second three phase mains (Ug), voltage source converter (VSC) is when coordinating chopper (chopper) to control the upper electric current of current-limiting inductance (Ls), compensation flows to harmonic current and the reactive power of the second three phase mains (Ug) from the first three phase mains (Us), (2) failure current limit state: after electrical network is short-circuited fault, current-limiting inductance (Ls) is automatically connected into power network line, increased system impedance, thereby reduced the electrical network overcurrent, voltage source converter (VSC) and chopper (chopper) coordinate simultaneously, to current-limiting inductance (Ls) current discharge, to strengthen current limitation effect, when the current value overrate of current-limiting inductance (Ls), with the first switch (S1), the 3rd switch (S3) and the 5th switch (S5) disconnect, second switch (S2), the 4th switch (S4) and the 6th switch (S6) closure, line voltage distribution will no longer charge to current-limiting inductance, resistance by bypass branch carries out failure current limit to electrical network.
5. flow controller with failure current limit function, it is characterized in that in described flow controller: current source converter (CSC) and three-phase filter circuit thereof and triphase step-down transformer (Tr) form power regulating system in parallel (PCS); The three-phase alternating current end of current source converter (CSC) is connected by the low-pressure side of filter circuit with triphase step-down transformer (Tr), and the high-pressure side of triphase step-down transformer (Tr) is connected with the first three phase mains (Us); Three-phase current source current transformer (CSC) direct current end is mutually connected with the direct current pressure side of current-limiting inductance (Ls) and three-phase diode rectifier (Rf) and is formed the loop; The three-phase alternating current pressure side of three-phase diode rectifier (Rf) is connected with the first switch (S1), the 3rd switch (S3) and an end of the 5th switch (S5) respectively, the other end of the first switch (S1), the 3rd switch (S3) and the 5th switch (S5) is connected with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and an end of the low-pressure side of the 3rd single-phase transformer (Tr3) respectively, and the other end of the low-pressure side of the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the 3rd single-phase transformer (Tr3) interconnects; Second switch (S2) and the first resistance (R1) series connection form the first bypass branch (P1), and the first bypass branch (P1) is in parallel with the two ends of the low-pressure side of the first single-phase transformer (Tr1); The 4th switch (S4) and the second resistance (R2) series connection form the second bypass branch (P2), and the second bypass branch (P2) is in parallel with the two ends of the low-pressure side of the second single-phase transformer (Tr2); The 6th switch (S6) and the 3rd resistance (R3) series connection form the 3rd bypass branch (P3), and the 3rd bypass branch (P3) is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer (Tr3); One end of the first series compensation capacitance (C1), the second series compensation capacitance (C2) and the 3rd series compensation capacitance (C3) is connected respectively with the three-phase of the second three phase mains (Ug) respectively, and the other end of the first series compensation capacitance (C1), the second series compensation capacitance (C2) and the 3rd series compensation capacitance (C3) is connected with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the on high-tension side end of the 3rd single-phase transformer (Tr3) respectively; The first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the on high-tension side other end of the 3rd single-phase transformer (Tr3) are connected respectively with the three-phase of the first three phase mains (Us).
6. the flow controller with failure current limit function, is characterized in that in described flow controller: current source converter (CSC) and three-phase filter circuit thereof and triphase step-down transformer composition power regulating system in parallel (PCS), the three-phase alternating current end of current source converter (CSC) is connected by the low-pressure side of filter circuit with triphase step-down transformer (Tr), and the high-pressure side of triphase step-down transformer (Tr) is connected with the first three phase mains (Us), current source converter (CSC) direct current end is mutually connected with the direct current pressure side of current-limiting inductance (Ls), the first single-phase diode rectifier (Rf1), the second single-phase diode rectifier (Rf2) and the 3rd single-phase diode rectifier (Rf3) and is formed the loop, three single-phase diode rectifier (Rf1, Rf2, one end of alternating current pressure side Rf3) respectively with the first switch (S1), the 3rd switch (S3) is connected with an end of the 5th switch (S5), three single-phase diode rectifier (Rf1, Rf2, the other end of alternating current pressure side Rf3) respectively with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) is connected with an end of the 3rd single-phase transformer (Tr3) low-pressure side, the first switch (S1), the other end of the 3rd switch (S3) and the 5th switch (S5) respectively with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) is connected with the other end of the 3rd single-phase transformer (Tr3) low-pressure side, second switch (S2) and the first resistance (R1) series connection form the first bypass branch (P1), and the first bypass branch (P1) is in parallel with the two ends of the low-pressure side of the first single-phase transformer (Tr1), the 4th switch (S4) and the second resistance R 2 series connection form the second bypass branch (P2), and the second bypass branch (P2) is in parallel with the two ends of the low-pressure side of the second single-phase transformer (Tr2), the 6th switch (S6) and the 3rd resistance (R3) series connection form the 3rd bypass branch (P3), and the 3rd bypass branch (P3) is in parallel with the two ends of the low-pressure side of the 3rd single-phase transformer (Tr3), one end of the first series compensation capacitance (C1), the second series compensation capacitance (C2) and the 3rd series compensation capacitance (C3) is connected respectively with the three-phase of the second three phase mains (Ug) respectively, and the other end of the first series compensation capacitance (C1), the second series compensation capacitance (C2) and the 3rd series compensation capacitance (C3) is connected with the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the on high-tension side end of the 3rd single-phase transformer (Tr3) respectively, the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the on high-tension side other end of the 3rd single-phase transformer (Tr3) are connected respectively with the three-phase of the first three phase mains (Us).
7. according to the described flow controller with failure current limit function of claim 5 or 6, it is characterized in that, the power regulating system described in parallel (PCS) that a plurality of structures are identical forms combination power regulating system in parallel, the high-pressure side of the triphase step-down transformer of described combination power regulating system in parallel is parallel with one another, and the direct current end of current source converter is connected mutually.
8. according to claim 5 or 6 described flow controllers with failure current limit function, it is characterized in that controlling respectively for two kinds of operating states of described flow controller: (1) normal operating conditions: this moment the first switch (S1), the 3rd switch (S3) and the 5th switch (S5) closure, second switch (S2), the 4th switch (S4) and the 6th switch (S6) disconnect, current source converter (CSC) is by controlling the electric current on current-limiting inductance (Ls), control the amplitude of the line current between the first three phase mains (Us) and the second three phase mains (Ug), thereby control the size from the first three phase mains (Us) to the flow of power the second three phase mains (Ug), current source converter (CSC) is when controlling the upper electric current of current-limiting inductance (Ls), compensation flows to harmonic current and the reactive power of the second three phase mains (Ug) from the first three phase mains (Us), (2) failure current limit state: after electrical network is short-circuited fault, current-limiting inductance (Ls) is automatically connected into power network line, increased system impedance, thereby reduced the electrical network overcurrent, current source converter (CSC) is to current-limiting inductance (Ls) current discharge simultaneously, to strengthen current limitation effect, when the current value overrate of current-limiting inductance (Ls), with the first switch (S1), the 3rd switch (S3) and the 5th switch (S5) disconnect, second switch (S2), the 4th switch (S4) and the 6th switch (S6) closure, line voltage distribution will no longer charge to current-limiting inductance, the resistance of bypass branch carries out failure current limit to electrical network.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102545222A (en) * 2011-12-21 2012-07-04 武汉理工大学 Distributed power flow controller based on line cubic harmonic wave
CN102820654B (en) * 2012-09-12 2014-10-29 湖南大学 Cooperative control method of power electronic system
CN103701113B (en) * 2013-08-31 2017-02-15 清华大学 Power flow control device
CN104701838A (en) * 2013-12-06 2015-06-10 广西大学 Unified power quality adjusting device based on battery energy storage
CN105186551A (en) * 2015-09-14 2015-12-23 浙江大学 Current-limiting unified power flow controller and method based on modular multi-level current converter
CN105322546B (en) * 2015-10-29 2018-02-09 中国科学院电工研究所 AC/DC decoupling mixed current algorithm
DE102016200662A1 (en) * 2016-01-20 2017-07-20 Robert Bosch Gmbh Bidirectional DC / DC converter and method for charging the DC link capacitor of a DC / DC converter from the low-voltage battery
PL231869B1 (en) * 2017-05-09 2019-04-30 Akademia Gorniczo Hutnicza Im Stanislawa Staszica W Krakowie System for electrical energy quality improvement
CN108767830B (en) * 2018-06-12 2020-03-10 国网江苏省电力有限公司电力科学研究院 Mixed type fault current controller based on unified power flow controller
CN108879679B (en) * 2018-06-29 2021-03-02 国网湖南省电力有限公司 Multi-target electric energy quality comprehensive treatment device for medium-voltage power distribution network
CN108964026B (en) * 2018-06-29 2021-01-29 国网湖南省电力有限公司 Unified power quality regulator for medium-voltage distribution network
CN109256777A (en) * 2018-09-20 2019-01-22 东南大学 IPFC topology and its Steady state modeling method suitable for double-circuit line power flowcontrol in parallel
CN110137968B (en) * 2019-05-13 2021-02-26 南方电网科学研究院有限责任公司 Harmonic power flow calculation method containing VSC

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1391324A (en) * 2002-06-27 2003-01-15 浙江大学 Current limiter with by-pass inductor for short-circuit failure
CN101174771A (en) * 2007-11-09 2008-05-07 华中科技大学 Fault current limiting device
CN101707365A (en) * 2009-11-25 2010-05-12 中国科学院电工研究所 Short-circuit fault current limiter
CN101872965A (en) * 2010-06-18 2010-10-27 中国科学院电工研究所 Current-limiting energy storage circuit and control method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1391324A (en) * 2002-06-27 2003-01-15 浙江大学 Current limiter with by-pass inductor for short-circuit failure
CN101174771A (en) * 2007-11-09 2008-05-07 华中科技大学 Fault current limiting device
CN101707365A (en) * 2009-11-25 2010-05-12 中国科学院电工研究所 Short-circuit fault current limiter
CN101872965A (en) * 2010-06-18 2010-10-27 中国科学院电工研究所 Current-limiting energy storage circuit and control method thereof

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