CN101872965B - Current-limiting energy storage circuit and control method thereof - Google Patents
Current-limiting energy storage circuit and control method thereof Download PDFInfo
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- CN101872965B CN101872965B CN201010209714.5A CN201010209714A CN101872965B CN 101872965 B CN101872965 B CN 101872965B CN 201010209714 A CN201010209714 A CN 201010209714A CN 101872965 B CN101872965 B CN 101872965B
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Abstract
The invention discloses a superconductive current-limiting energy storage circuit and a control method thereof. A superconducting magnet is connected in series with a power grid through a current source converter, a filter capacitor, a switch, a voltage dependent resistor, a transformer and the like. In a normal state, the voltage of the filter capacitor is changed and the voltage distortion of the power grid is compensated by controlling the current injected into the filter capacitor by the current source converter so as to improve the quality of the power supply voltage of a load. When a circuit is short-circuited, the filter capacitor is disconnected with the power grid through the switch and the voltage dependent resistor, and all the switches of the current source converter are turned on, so that the superconducting magnet is connected in series with the power grid in the form of uncontrolled rectifier so as to limit the fault current.
Description
Technical field
The present invention relates to a kind of current-limiting energy storage circuit and control method thereof.
Background technology
Fast development along with national economy, society constantly increases electricity needs, driven the development of electric power system, unit and station capacity, substation capacity, city and central concentrated load constantly increase, just make between electric power system interconnected, short circuit current level in electrical networks at different levels improves constantly, and short trouble is also increasing to the destructiveness of electric power system and connected electric equipment thereof.And in growing to power requirement amount, people also have higher requirement to the quality of power supply, power supply reliability and fail safe etc.Yet the transient stability problem of large electrical network is more outstanding, wherein one of most important reason is because conventional electric power technology lacks effective short trouble current limiting technique.At present, extensively adopt in the world circuit breaker fully to cut-off short circuit current, because short circuit current level is directly related with the capacity of system, in the situation that the specified drop-out current level of circuit breaker is certain, adopt and fully cut-off the growth that short circuit current will limit electric power system capacity, and circuit breaker price rises rapidly along with the increase of its specified drop-out current.Along with the expansion of net capacity and scale, it is more serious that this problem will become.
Meanwhile, along with information technology and microelectric technique increasingly extensive be penetrated into the every field that industry and people live, and then the quality of power supply and power supply reliability have been proposed to more and more higher requirement, conventional electric power technology has been difficult to adapt to people's this requirement.
Short-circuit fault current limiter is the effective way that solves short trouble problem.It seals in impedance and carrys out fault current limiting by when electrical network is short-circuited in faulty line, with the object that reaches protection power equipment and circuit breaker can reliably be cut-off.And superconductive energy storage system (SMES) has advantages of that reaction speed is fast, power density is high and conversion efficiency is high, aspect dynamic stability problem, the raising quality of power supply and the power supply reliability of the existing electric power system of solution, can bring into play irreplaceable effect.United States Patent (USP) U.S 5,726,848 " fault current limiter and AC circuit breaker ", has proposed a kind of short-circuit fault current limiter, as shown in Figure 1.It adopts a kind of single-phase thyristor rectification bridge construction, current-limiting inductance is connected in parallel on to the DC terminal of rectifier bridge, by controlling the phase shifting angle of thyristor, carrys out fault current limiting.The subject matter of this patent is that harmonic content is high, larger on the impact of load; More complicated with period control method, reliability is low.US Patent No. 2002/0030952 " superconducting magnet charging method and device " has proposed a kind of superconductive energy storage system structure, as shown in Figure 2.It can realize the protection to critical loads, and to improve power supply quality, its major defect is function singleness, and equipment rate is low by rate.Chinese patent CN100527560C " a kind of bridge circuit type current limiting energy storage circuit " has proposed a kind of circuit that can simultaneously realize failure current limit and load terminal voltage protection, as shown in Figure 3.Its major defect is to realize to a circuit function of failure current limit, and an other circuit is realized the function of load terminal voltage protection.Can only be applicable to specific occasion, applicable surface is low.Chinese patent CN100527559C " a kind of line-to-line voltage compensation type current limiting energy storage circuit " has proposed a kind of circuit that can simultaneously realize failure current limit and load terminal voltage protection, as shown in Figure 4.Its major defect is because converter is connected with electrical network by current-limiting inductance and transformer, due to the existence of current-limiting inductance, cannot stablize the voltage at control transformer two ends, and the difficulty that therefore realizes load terminal voltage protection is large, and reliability is low.Chinese patent 200910241236.3 " a kind of superconducting current-limiting energy storage circuit ", as shown in Figure 5.Realized the function of energy storage and failure current limit, but its major defect is that filter capacitor is connected with circuit all the time in failure current limit process simultaneously, likely produces resonance with current-limiting inductance, thereby affect the effect of failure current limit.
Summary of the invention
In order to overcome the deficiency of prior art, the present invention proposes a kind of superconducting current-limiting energy storage circuit and failure current limit method thereof, it is connected in series by current source converter, filter capacitor, switch, piezo-resistance and transformer etc. superconducting magnet with electrical network.Under normal condition, by controlling current source converter, inject the electric current of filter capacitor, change the voltage of filter capacitor, the voltage distortion of compensation network, and then improve the supply power voltage quality of load.When circuit is short-circuited fault, by switch and piezo-resistance, filter capacitor and electrical network are disconnected, and open all switches of current source converter, make superconducting magnet seal in electrical network not control the form of rectification, thereby play the effect of failure current limit.
Superconducting current-limiting energy storage circuit of the present invention has following two kinds of versions:
1, superconducting current-limiting energy storage circuit structure of the present invention is as follows: the first switch, second switch, the 3rd switch, the 4th switch, the 5th switch and the 6th switch form the first current source converter.The negative electrode of the first switch is connected with the anode of the 4th switch, and its tie point is the first interchange tie point; The first switch and the 4th switch form the first half-bridge of the first current source inverter; The negative electrode of second switch is connected with the anode of the 5th switch, and its tie point is the second interchange tie point; Second switch and the 5th switch form the second half-bridge of the first current source inverter; The negative electrode of the 3rd switch is connected with the anode of the 6th switch, and its tie point is the 3rd interchange tie point; The 3rd switch and the 6th switch form the 3rd half-bridge of the first current source inverter.Together with the anodic bonding of the first switch, second switch and the 3rd switch, its tie point is the first direct current tie point; The negative electrode of the 4th switch, the 5th switch and the 6th switch links together, and its tie point is the second direct current tie point; The anode that minion is closed is connected with the second direct current tie point, and the negative electrode that minion is closed is connected with the first direct current tie point.The two ends of superconducting magnet are connected with the 3rd direct current tie point with the first direct current tie point respectively.The outflow of bus current end of the first current source is connected with the 3rd direct current tie point, and the electric current of the first current source flows into end and is connected with the second direct current tie point.After the one end on one end of the 8th switch and the first single-phase transformer time limit is connected, exchanging tie point with first is connected; The other end of the 8th switch is connected with one end of the first filter capacitor.After the one end on one end of the 9th switch and the second single-phase transformer time limit is connected, exchanging tie point with second is connected; The other end of the 9th switch is connected with one end of the second filter capacitor.After the one end on one end of the tenth switch and the 3rd single-phase transformer time limit is connected, exchanging tie point with the 3rd is connected; The other end of the tenth switch is connected with one end of the 3rd filter capacitor.The connected formation the 4th of the other end of the other end of the other end of the first filter capacitor, the second filter capacitor and the 3rd filter capacitor exchanges tie point.The other end on the first single-phase transformer, the second single-phase transformer and the 3rd single-phase transformer time limit and the 4th exchanges tie point and is connected.The two ends on the inferior limit of the first single-phase transformer are connected with the two ends of the first piezo-resistance; The two ends on the inferior limit of the second single-phase transformer are connected with the two ends of the second piezo-resistance; The two ends on the inferior limit of the 3rd single-phase transformer are connected with the two ends of the 3rd piezo-resistance.The one end on the first former limit of single-phase transformer is connected with one end of electrical network first-phase power supply, and the other end on the first former limit of single-phase transformer is connected with one end of first-phase load.The one end on the second former limit of single-phase transformer is connected with one end of electrical network second-phase power supply, and the other end on the second former limit of single-phase transformer is connected with one end of second-phase load.The one end on the 3rd former limit of single-phase transformer is connected with one end of electrical network third phase power supply respectively, and the other end on the 3rd former limit of single-phase transformer is connected with one end of third phase load.Described the first switch, second switch, the 3rd switch, the 4th switch, the 5th switch, the 6th switch and minion are closed and are inverse-impedance type switch, or substitute described inverse-impedance type switch by the contrary diode of type switch series connection of leading.The 8th switch, the 9th switch and the tenth switch are bidirectional high speed switch.
Control method to the superconducting current-limiting energy storage circuit of this version is as follows: 1, when system just starts, all switches are all closed, and now the voltage drop value on transformer time limit is close to zero, and superconducting current-limiting energy storage circuit is on the not impact of the voltage of load; Now the first current source charges to superconducting magnet, makes the Current rise of superconducting magnet near set-point.2, under normal condition, minion is closed and is disconnected, and the 8th switch, the 9th switch and the tenth switch are closed.The first current source converter is injected the electric current of filter capacitor and then is changed the voltage on filter capacitor by change, and this voltage acts on the inferior limit of transformer, thereby distortion that can compensation network voltage improves the supply power voltage quality of load end.Simultaneously the first current source discharges and recharges superconducting magnet, with the electric current that maintains superconducting magnet near set-point.3, when circuit overcurrent being detected, all switches of the first current source converter are all closed, and minion pass, the 8th switch, the 9th switch, the tenth switch disconnect; If the amplitude of line current does not surpass the electric current of superconducting magnet, all line currents are not by the first current source converter to control the form of the rectification superconducting magnet of flowing through, and superconducting magnet is sealed in electrical network, thereby plays the effect of failure current limit.If line current has surpassed the electric current of superconducting magnet, the part not exceeding is still by the first current source converter superconducting magnet of flowing through, and the part exceeding, owing to lacking path, induces high voltage, puncture piezo-resistance, by piezo-resistance, carry out earial drainage and discharge overshoot energy.Piezo-resistance is the puncture voltage to piezo-resistance by the voltage clamp inducing simultaneously, thereby guarantees that the first current source converter is unlikely to damage because of overvoltage; When the amplitude of line current drops under superconducting magnet current value, all electric currents all will flow through superconducting magnet not control the form of rectification, thereby fault current is afterwards played to restriction completely.And the first current source discharges to superconducting magnet, so that the electric current of superconducting magnet is remained in safe scope.Due to by switching manipulation, in the process of failure current limit, filter capacitor is isolated to current path completely, therefore can prevent from producing resonance between filter capacitor and current-limiting inductance, thereby can guarantee the effect of failure current limit.
A kind of superconducting current-limiting energy storage circuit of 2 the present invention can also be following structure: the first switch, second switch, the 3rd switch and the 4th switch form the first current source converter.The negative electrode of the 4th switch is connected with the anode of the first switch, its tie point for its tie point be the first interchange tie point; The 3rd negative electrode of switch and the anode of second switch are connected, its tie point for its tie point be the second interchange tie point; The negative electrode of the first switch and second switch is connected, its tie point for its tie point be the first direct current tie point; The 3rd switch is connected with the anode of the 4th switch, its tie point for its tie point be the second direct current tie point.The 5th switch, the 6th switch, minion are closed and the 8th switch forms the second current source converter.The negative electrode of the 8th switch is connected with the anode of the 5th switch, and its tie point is the 3rd interchange tie point; The negative electrode that minion is closed is connected with the anode of the 6th switch, and its tie point is the 4th interchange tie point; The 5th switch is connected with the negative electrode of the 6th switch, and its tie point is the 3rd direct current tie point; Minion is closed and is connected with the anode of the 8th switch, and its tie point is the 4th direct current tie point.The 9th switch, the tenth switch, the 11 switch and twelvemo are closed and are formed the 3rd current source converter.The negative electrode that twelvemo is closed is connected with the anode of the 9th switch, and its tie point is the 5th interchange tie point; The negative electrode of the 11 switch is connected with the anode of the tenth switch, and its tie point is the 6th interchange tie point; The 9th switch is connected with the negative electrode of the tenth switch, and its tie point is the 5th direct current tie point; The 11 switch is connected with the anode that twelvemo is closed, and its tie point is the 6th direct current tie point.The two ends of superconducting magnet are connected with the 7th direct current tie point with the second direct current tie point respectively.The outflow of bus current end of the first current source is connected with the 7th direct current tie point, and the electric current of the first current source flows into end and is connected with the 5th direct current tie point.The first direct current tie point is connected with the 4th direct current tie point; The 3rd direct current tie point is connected with the 6th direct current tie point.The anode of the 13 switch is connected with the first direct current tie point, and the negative electrode of the 13 switch is connected with the second direct current tie point; The anode of the 14 switch is connected with the 3rd direct current tie point, and the negative electrode of the 14 switch is connected with the 4th direct current tie point; The anode of the 15 switch is connected with the 5th direct current tie point, and the negative electrode of the 15 switch is connected with the 6th direct current tie point.One end of the first filter capacitor is connected with one end that sixteenmo closes, and the other end of the first filter capacitor exchanges tie point and is connected with first.The other end that sixteenmo closes exchanges tie point and is connected with second.The two ends on the first single-phase transformer time limit exchange respectively tie point, and exchanges tie point with second connected with first.The two ends of the first piezo-resistance exchange respectively tie point and exchange tie point with second and be connected with first.One end of the second filter capacitor is connected with one end that the tenth minion is closed, and the other end of the second filter capacitor exchanges tie point and is connected with the 3rd.The other end that the tenth minion is closed exchanges tie point and is connected with the 4th.The two ends on the second single-phase transformer time limit exchange respectively tie point, and exchange tie point with the 4th connected with the 3rd.The two ends of the second piezo-resistance exchange respectively tie point and exchange tie point with the 4th and be connected with the 3rd.One end of the 3rd filter capacitor is connected with one end that eighteenmo closes, and the other end of the 3rd filter capacitor exchanges tie point and is connected with the 5th.The other end that eighteenmo closes exchanges tie point and is connected with the 6th.The two ends on the 3rd single-phase transformer time limit exchange respectively tie point, and exchange tie point with the 6th connected with the 5th.The two ends of the 3rd piezo-resistance exchange respectively tie point and exchange tie point with the 6th and be connected with the 5th.The two ends on the first former limit of single-phase transformer are connected with one end of first-phase load with one end of electrical network first-phase power supply respectively; The two ends on the second former limit of single-phase transformer are connected with one end of second-phase load with one end of electrical network second-phase power supply respectively; The two ends on the 3rd former limit of single-phase transformer are connected with one end of third phase load with one end of electrical network third phase power supply respectively.Described the first switch, second switch, the 3rd switch, the 4th switch, the 5th switch, the 6th switch, minion pass, the 8th switch, the 9th switch, the tenth switch, the 11 switch, twelvemo pass, the 13 switch, the 14 switch and the 15 switch are inverse-impedance type switch, or substitute described inverse-impedance type switch with the contrary diode of type switch series connection of leading.Sixteenmo closes, the tenth minion is closed and eighteenmo closes as bidirectional high speed switch.
Control method to the superconducting current-limiting energy storage circuit of this version is as follows: 1, when system just starts, all switches are all closed, and now the voltage drop value on transformer time limit is close to zero, and superconducting current-limiting energy storage circuit is on the not impact of the voltage of load.Now the first current source superconducting magnet charging, makes the Current rise of superconducting magnet near set-point.2, under normal condition, the 13 switch, the 14 switch and the 15 switch disconnect, and sixteenmo closes, the tenth minion is closed and eighteenmo closes closed.The first current source converter, the second current source converter and the 3rd current source converter are injected the electric current of filter capacitor and then are changed the voltage on filter capacitor by change, this voltage acts on the inferior limit of transformer, thereby distortion that can compensation network voltage, improves the supply power voltage quality of load end.Simultaneously the first current source discharges and recharges superconducting magnet, with the electric current that maintains superconducting magnet near set-point.3, when circuit overcurrent being detected, all switches of the first current source converter, the second current source converter and the 3rd current source converter are all closed, and the 13 switch, the 14 switch, the 15 switch, sixteenmo close, the tenth minion is closed and eighteenmo closes disconnection.If the amplitude of line current does not surpass the electric current of superconducting magnet, all line currents by the first current source converter, the second current source converter and the 3rd current source converter not control the form of the rectification superconducting magnet of flowing through, superconducting magnet is sealed in electrical network, thereby plays the effect of failure current limit.If line current has surpassed the electric current of superconducting magnet, the part not exceeding is still by the first current source converter, the second current source converter and the 3rd current source converter superconducting magnet of flowing through.The part exceeding, owing to lacking path, induces high voltage, punctures piezo-resistance, by piezo-resistance, is carried out earial drainage and is discharged overshoot energy.Piezo-resistance is the puncture voltage to piezo-resistance by the voltage clamp inducing simultaneously, thereby guarantees that the first current source converter, the second current source converter and the 3rd current source converter are unlikely to damage because of overvoltage.When the amplitude of line current drops under superconducting magnet current value, all electric currents all will flow through superconducting magnet not control the form of rectification, thereby fault current is afterwards played to restriction completely.And the first current source discharges to superconducting magnet, so that the electric current of superconducting magnet is remained in safe scope.Due to by switching manipulation, in the process of failure current limit, filter capacitor is isolated to current path completely, therefore can prevent from producing resonance between filter capacitor and current-limiting inductance, thereby can guarantee the effect of failure current limit.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.
Fig. 1 is the topology diagram of United States Patent (USP) U.S 5,726,848 " fault current limiter and AC circuit breaker ";
Fig. 2 is the topology diagram of US Patent No. 2002/0030952 " superconducting magnet charging method and device ";
Fig. 3 is the topology diagram of Chinese patent CN100527560C " a kind of bridge circuit type current limiting energy storage circuit ";
Fig. 4 is the topology diagram of Chinese patent CN100527559C " a kind of line-to-line voltage compensation type current limiting energy storage circuit ";
Fig. 5 is the topology diagram of Chinese patent 200910241236.3 " a kind of superconducting current-limiting energy storage circuit ";
Fig. 6 is the circuit topological structure figure of the embodiment of the present invention 1;
Fig. 7 is the circuit topological structure figure of the embodiment of the present invention 2.
Embodiment
Fig. 6 is the topological structure of embodiments of the invention 1.As shown in Figure 6, the structure of the embodiment of the present invention 1 is as follows: the first switch S 1, second switch S2, the 3rd switch S 3, the 4th switch S 4, the 5th switch S 5 and the 6th switch S 6 form the first current source converter CSC1.The negative electrode of the first switch S 1 is connected with the anode of the 4th switch S 4, and its tie point is the first interchange tie point PA1.The first switch S 1 and the 4th switch S 4 form the first half-bridge HB1 of the first current source inverter CSC1.The negative electrode of second switch S2 is connected with the anode of the 5th switch S 5, and its tie point is the second interchange tie point PA2.Second switch S2 and the 5th switch S 5 form the second half-bridge HB2 of the first current source inverter CSC1.The negative electrode of the 3rd switch S 3 is connected with the anode of the 6th switch S 6, and its tie point is the 3rd interchange tie point PA3.The 3rd switch S 3 and the 6th switch S 6 form the 3rd half-bridge HB3 of the first current source inverter CSC1.Together with the anodic bonding of the first switch S 1, second switch S2 and the 3rd switch S 3, its tie point is the first direct current tie point PD1; The negative electrode of the 4th switch S 4, the 5th switch S 5 and the 6th switch S 6 links together, and its tie point is the second direct current tie point PD2.The anode that minion is closed S7 is connected with the second direct current tie point PD2, and the negative electrode that minion is closed S7 is connected with the first direct current tie point PD1.The two ends of superconducting magnet Lsc are connected with the 3rd direct current tie point PD3 with the first direct current tie point PD1 respectively.The outflow of bus current end of the first current source Idc is connected with the 3rd direct current tie point PD3, and the electric current of the first current source flows into end and is connected with the second direct current tie point PD2.The one end on one end of the 8th switch S8 and the first Tr1 limit of single-phase transformer exchanges tie point PA1 and is connected with first after being connected; The other end of the 8th switch S8 is connected with one end of the first filter capacitor C1.The one end on one end of the 9th switch S 9 and the second Tr2 limit of single-phase transformer exchanges tie point PA2 and is connected with second after being connected; The other end of the 9th switch S 9 is connected with one end of the second filter capacitor C2.The one end on one end of the tenth switch S 10 and the 3rd Tr3 limit of single-phase transformer exchanges tie point PA3 and is connected with the 3rd after being connected.The other end of the tenth switch S 10 is connected with one end of the 3rd filter capacitor C3.The other end of the other end of the first filter capacitor C1, the second filter capacitor C2 is connected with the other end of the 3rd filter capacitor C3, and its tie point is the 4th interchange tie point PA4; The other end on the first single-phase transformer Tr1, the second single-phase transformer Tr2 and the 3rd Tr3 limit of single-phase transformer and the 4th exchanges tie point PA4 and is connected.The two ends on the inferior limit of the first single-phase transformer Tr1 are connected with the two ends of the first piezo-resistance V1; The two ends on the inferior limit of the second single-phase transformer Tr2 are connected with the two ends of the second piezo-resistance V2; The two ends on the inferior limit of the 3rd single-phase transformer Tr3 are connected with the two ends of the 3rd piezo-resistance V3.The one end on the first former limit of single-phase transformer Tr1 is connected with one end of electrical network first-phase power supply Us1, and the other end on the first former limit of single-phase transformer Tr1 is connected with one end of first-phase load Z1.The one end on the second former limit of single-phase transformer Tr2 is connected with one end of electrical network second-phase power supply Us2, and the other end on the second former limit of single-phase transformer Tr2 is connected with one end of second-phase load Z2.The one end on the 3rd former limit of single-phase transformer Tr3 is connected with one end of electrical network third phase power supply Us3 respectively, and the other end on the 3rd former limit of single-phase transformer Tr3 is connected with one end of third phase load Z3.Described the first switch S 1, second switch S2, the 3rd switch S 3, the 4th switch S 4, the 5th switch S 5, the 6th switch S 6 and minion are closed S7 and are inverse-impedance type switch, or substitute described inverse-impedance type switch by the contrary diode of type switch series connection of leading.The 8th switch S8, the 9th switch S 9 and the tenth switch S 10 are bidirectional high speed switch.
Control method to the embodiment 1 shown in Fig. 6 is: 1, when system just starts, all switches are all closed, and now the voltage drop value on transformer time limit is close to zero, and superconducting current-limiting energy storage circuit is on the not impact of the voltage of load.Now the first current source Idc charges to superconducting magnet, makes the Current rise of superconducting magnet near set-point.2,, under normal condition, minion is closed S7 and is disconnected, the 8th switch S8, the 9th switch S 9 and the tenth switch S 10 closures.The first current source converter CSC1 is injected the electric current of filter capacitor and then is changed the voltage on filter capacitor by change, and this voltage acts on the inferior limit of transformer, thereby distortion that can compensation network voltage improves the supply power voltage quality of load end.Simultaneously the first current source Idc discharges and recharges superconducting magnet, with the electric current that maintains superconducting magnet near set-point.3, when circuit overcurrent being detected, all switches of the first current source converter CSC1 are all closed, and minion is closed S7, the 8th switch S8, the 9th switch S 9, the tenth switch S 10 disconnections.If the amplitude of line current does not surpass the electric current of superconducting magnet, all line currents are not by the first current source converter CSC1 to control the form of the rectification superconducting magnet of flowing through, and superconducting magnet is sealed in electrical network, thereby plays the effect of failure current limit.If line current has surpassed the electric current of superconducting magnet, the part not exceeding is still by the first current source converter CSC1 superconducting magnet of flowing through, and the part exceeding, owing to lacking path, induces high voltage, puncture piezo-resistance, by piezo-resistance, carry out earial drainage and discharge overshoot energy.Piezo-resistance is the puncture voltage to piezo-resistance by the voltage clamp inducing simultaneously, thereby guarantees that the first current source converter CSC1 is unlikely to damage because of overvoltage.When the amplitude of line current drops under superconducting magnet current value, all electric currents all will flow through superconducting magnet not control the form of rectification, thereby fault current is afterwards played to restriction completely.And the first current source Idc discharges to superconducting magnet, the electric current of superconducting magnet is remained in safe scope as far as possible.Due to by switching manipulation, in the process of failure current limit, filter capacitor is isolated to current path completely, therefore can prevent from producing resonance between filter capacitor and current-limiting inductance, thereby can guarantee the effect of failure current limit.
Fig. 7 is the topological structure of embodiments of the invention 2.As shown in Figure 7, the structure of the embodiment of the present invention 2 is as follows: the first switch S 1, second switch S2, the 3rd switch S 3 and the 4th switch S 4 form the first current source converter CSC1.The negative electrode of the 4th switch S 4 is connected with the anode of the first switch S 1, and its tie point is the first interchange tie point PA1; The negative electrode of the 3rd switch S 3 is connected with the anode of second switch S2, and its tie point is the second interchange tie point PA2.The first switch S 1 is connected with the negative electrode of second switch S2, and its tie point is the first direct current tie point PD1; The 3rd switch S 3 is connected with the anode of the 4th switch S 4, and its tie point is the second direct current tie point PD2.The 5th switch S 5, the 6th switch S 6, minion close S7 and the 8th switch S8 forms the second current source converter CSC2.The negative electrode of the 8th switch S8 is connected with the anode of the 5th switch S 5, and its tie point is the 3rd interchange tie point PA3; The negative electrode that minion is closed S7 is connected with the anode of the 6th switch S 6, and its tie point is the 4th interchange tie point PA4.The 5th switch S 5 is connected with the negative electrode of the 6th switch S 6, and its tie point is the 3rd direct current tie point PD3; Minion is closed S7 and is connected with the anode of the 8th switch S8, and its tie point is the 4th direct current tie point PD4.The 9th switch S 9, the tenth switch S the 10, the 11 switch S 11 and twelvemo are closed S12 and are formed the 3rd current source converter CSC3.The negative electrode that twelvemo is closed S12 is connected with the anode of the 9th switch S 9, and its tie point is the 5th interchange tie point PA5; The negative electrode of the 11 switch S 11 is connected with the anode of the tenth switch S 10, and its tie point is the 6th interchange tie point PA6.The 9th switch S 9 is connected with the negative electrode of the tenth switch S 10, and its tie point is the 5th direct current tie point PD5; The 11 switch S 11 is connected with the anode that twelvemo is closed S12, and its tie point is the 6th direct current tie point PD6.The two ends of superconducting magnet Lsc are connected with the 7th direct current tie point PD7 with the second direct current tie point PD2 respectively.The outflow of bus current end of the first current source Idc is connected with the 7th direct current tie point PD7, and the electric current of the first current source flows into end and is connected with the 5th direct current tie point PD5.The first direct current tie point PD1 is connected with the 4th direct current tie point PD4; The 3rd direct current tie point PD3 is connected with the 6th direct current tie point PD6.The anode of the 13 switch S 13 is connected with the first direct current tie point PD1, and the negative electrode of the 13 switch S 13 is connected with the second direct current tie point PD2.The anode of the 14 switch S 14 is connected with the 3rd direct current tie point PD3, and the negative electrode of the 14 switch S 14 is connected with the 4th direct current tie point PD4.The anode of the 15 switch S 15 is connected with the 5th direct current tie point PD5, and the negative electrode of the 15 switch S 15 is connected with the 6th direct current tie point PD6.One end of the first filter capacitor C1 is connected with one end that sixteenmo closes S16, and the other end of the first filter capacitor C1 exchanges tie point PA1 and is connected with first.The other end of sixteenmo pass S16 exchanges tie point PA2 and is connected with second.The two ends on the first Tr1 limit of single-phase transformer exchange respectively tie point PA1 and exchange tie point PA2 with second and be connected with first.The two ends of the first piezo-resistance V1 exchange respectively tie point PA1 and exchange tie point PA2 with second and be connected with first.One end of the second filter capacitor C2 is connected with one end that the tenth minion is closed S17, and the other end of the second filter capacitor C2 exchanges tie point PA3 and is connected with the 3rd.The other end of the tenth minion pass S17 exchanges tie point PA4 and is connected with the 4th.The two ends on the second Tr2 limit of single-phase transformer exchange respectively tie point PA3 and exchange tie point PA4 with the 4th and be connected with the 3rd.The two ends of the second piezo-resistance V2 exchange respectively tie point PA3 and exchange tie point PA4 with the 4th and be connected with the 3rd.One end of the 3rd filter capacitor C3 is connected with one end that eighteenmo closes S18, and the other end of the 3rd filter capacitor C3 exchanges tie point PA5 and is connected with the 5th.The other end of eighteenmo pass S18 exchanges tie point PA6 and is connected with the 6th.The two ends on the 3rd Tr3 limit of single-phase transformer exchange respectively tie point PA5 and exchange tie point PA6 with the 6th and be connected with the 5th.The two ends of the 3rd piezo-resistance V3 exchange respectively tie point PA5 and exchange tie point PA6 with the 6th and be connected with the 5th.The two ends on the first former limit of single-phase transformer Tr1 are connected with one end of first-phase load Z1 with one end of electrical network first-phase power supply Us1 respectively; The two ends on the second former limit of single-phase transformer Tr2 are connected with one end of second-phase load Z2 with one end of electrical network second-phase power supply Us2 respectively; The two ends on the 3rd former limit of single-phase transformer Tr3 are connected with one end of third phase load Z3 with one end of electrical network third phase power supply Us3 respectively.Described the first switch S 1, second switch S2, the 3rd switch S 3, the 4th switch S 4, the 5th switch S 5, the 6th switch S 6, minion are closed S7, the 8th switch S8, the 9th switch S 9, the tenth switch S the 10, the 11 switch S 11, twelvemo pass S12, the 13 switch S the 13, the 14 switch S 14 and the 15 switch S 15 and are inverse-impedance type switch, or substitute described inverse-impedance type switch with the contrary diode of type switch series connection of leading.Sixteenmo closes S16, the tenth minion closes S17 and eighteenmo pass S18 is bidirectional high speed switch.
Control method to the embodiment 2 shown in Fig. 7 is: 1, when system just starts, all switches are all closed, and now the voltage drop value on transformer time limit is close to zero, and superconducting current-limiting energy storage circuit is on the not impact of the voltage of load.Now the first current source Idc superconducting magnet charging, makes the Current rise of superconducting magnet near set-point.2,, under normal condition, the 13 switch S the 13, the 14 switch S 14 and the 15 switch S 15 disconnect; Sixteenmo closes S16, the tenth minion closes S17 and eighteenmo closes S18 closure.The first current source converter CSC1, the second current source converter CSC2 and the 3rd current source converter CSC3 are injected the electric current of filter capacitor and then are changed the voltage on filter capacitor by change, this voltage acts on the inferior limit of transformer, thereby distortion that can compensation network voltage, improves the supply power voltage quality of load end.Simultaneously the first current source Idc discharges and recharges superconducting magnet, with the electric current that maintains superconducting magnet near set-point.3,, when circuit overcurrent being detected, all switches of the first current source converter CSC1, the second current source converter CSC2 and the 3rd current source converter CSC3 are all closed.The 13 switch S the 13, the 14 switch S the 14, the 15 switch S 15, sixteenmo close S16, the tenth minion closes S17 and eighteenmo closes S18 disconnection; If the amplitude of line current does not surpass the electric current of superconducting magnet, all line currents by the first current source converter CSC1, the second current source converter CSC2 and the 3rd current source converter CSC3 not control the form of the rectification superconducting magnet of flowing through, superconducting magnet is sealed in electrical network, thereby plays the effect of failure current limit.If line current has surpassed the electric current of superconducting magnet, the part not exceeding is still by the first current source converter CSC1, the second current source converter CSC2 and the 3rd current source converter CSC3 superconducting magnet of flowing through.The part exceeding, owing to lacking path, induces high voltage, punctures piezo-resistance, by piezo-resistance, is carried out earial drainage and is discharged overshoot energy.Piezo-resistance is the puncture voltage to piezo-resistance by the voltage clamp inducing simultaneously, thereby guarantees that the first current source converter CSC1, the second current source converter CSC2 and the 3rd current source converter CSC3 are unlikely to damage because of overvoltage.When the amplitude of line current drops under superconducting magnet current value, all electric currents all will flow through superconducting magnet not control the form of rectification, thereby fault current is afterwards played to restriction completely.And the first current source Idc discharges to superconducting magnet, the electric current of superconducting magnet is remained in safe scope as far as possible.Due to by switching manipulation, in the process of failure current limit, filter capacitor is isolated to current path completely, therefore can prevent from producing resonance between filter capacitor and current-limiting inductance, thereby can guarantee the effect of failure current limit.
Claims (4)
1. a superconducting current-limiting energy storage circuit, in described superconducting current-limiting energy storage circuit: the first switch (S1), second switch (S2), the 3rd switch (S3), the 4th switch (S4), the 5th switch (S5) and the 6th switch (S6) form the first current source converter (CSC1); The negative electrode of the first switch (S1) is connected with the anode of the 4th switch (S4), and its tie point is the first interchange tie point (PA1); The first switch (S1) and the 4th switch (S4) form first half-bridge (HB1) of the first current source inverter (CSC1); The negative electrode of second switch (S2) is connected with the anode of the 5th switch (S5), and its tie point is the second interchange tie point (PA2); Second switch (S2) and the 5th switch (S5) form second half-bridge (HB2) of the first current source inverter (CSC1); The negative electrode of the 3rd switch (S3) is connected with the anode of the 6th switch (S6), and its tie point is the 3rd interchange tie point (PA3); The 3rd switch (S3) and the 6th switch (S6) form the 3rd half-bridge (HB3) of the first current source inverter (CSC1); Together, its tie point is the first direct current tie point (PD1) to the anodic bonding of the first switch (S1), second switch (S2) and the 3rd switch (S3); The negative electrode of the 4th switch (S4), the 5th switch (S5) and the 6th switch (S6) links together, and its tie point is the second direct current tie point (PD2); The anode that minion is closed (S7) is connected with the second direct current tie point (PD2), and the negative electrode that minion is closed (S7) is connected with the first direct current tie point (PD1); The two ends of superconducting magnet (Lsc) are connected with the 3rd direct current tie point (PD3) with the first direct current tie point (PD1) respectively; The outflow of bus current end of the first current source (Idc) is connected with the 3rd direct current tie point (PD3), and the electric current of the first current source flows into end and is connected with the second direct current tie point (PD2); The one end on one end of the 8th switch (S8) and the inferior limit of the first single-phase transformer (Tr1) exchanges tie point (PA1) and is connected with first after being connected, it is characterized in that, the other end of the 8th described switch (S8) is connected with one end of the first filter capacitor (C1); The one end on one end of the 9th switch (S9) and the inferior limit of the second single-phase transformer (Tr2) exchanges tie point (PA2) and is connected with second after being connected; The other end of the 9th switch (S9) is connected with one end of the second filter capacitor (C2); The one end on one end of the tenth switch (S10) and the 3rd inferior limit of single-phase transformer (Tr3) exchanges tie point (PA3) and is connected with the 3rd after being connected; The other end of the tenth switch (S10) is connected with one end of the 3rd filter capacitor (C3); The connected formation the 4th of the other end of the other end of the other end of the first filter capacitor (C1), the second filter capacitor (C2) and the 3rd filter capacitor (C3) exchanges tie point (PA4); The other end on the first single-phase transformer (Tr1), the second single-phase transformer (Tr2) and the 3rd inferior limit of single-phase transformer (Tr3) and the 4th exchanges tie point (PA4) and is connected; The two ends on the inferior limit of the first single-phase transformer (Tr1) are connected with the two ends of the first piezo-resistance (V1); The two ends on the inferior limit of the second single-phase transformer (Tr2) are connected with the two ends of the second piezo-resistance (V2); The two ends on the inferior limit of the 3rd single-phase transformer (Tr3) are connected with the two ends of the 3rd piezo-resistance (V3); The one end on the former limit of the first single-phase transformer (Tr1) is connected with one end of electrical network first-phase power supply (Us1), and the other end on the former limit of the first single-phase transformer (Tr1) is connected with one end of first-phase load (Z1); The one end on the former limit of the second single-phase transformer (Tr2) is connected with one end of electrical network second-phase power supply (Us2), and the other end on the former limit of the second single-phase transformer (Tr2) is connected with one end of second-phase load (Z2); The one end on the 3rd former limit of single-phase transformer (Tr3) is connected with one end of electrical network third phase power supply (Us3) respectively, and the other end on the 3rd former limit of single-phase transformer (Tr3) is connected with one end of third phase load (Z3); Described the first switch (S1), second switch (S2), the 3rd switch (S3), the 4th switch (S4), the 5th switch (S5), the 6th switch (S6) and minion are closed (S7) and are inverse-impedance type switch, or substitute described inverse-impedance type switch by the contrary diode of type switch series connection of leading; The 8th switch (S8), the 9th switch (S9) and the tenth switch (S10) are bidirectional switch.
2. superconducting current-limiting energy storage circuit according to claim 1, is characterized in that for the control method of described superconducting current-limiting energy storage circuit as follows:
(1) when system just starts, all switches are all closed, and now the voltage drop value on transformer time limit is close to zero, and superconducting current-limiting energy storage circuit is on the not impact of the voltage of load; Now the first current source (Idc), to superconducting magnet charging, makes the Current rise of superconducting magnet near set-point;
(2), under normal condition, minion is closed (S7) and is disconnected; The 8th switch (S8), the 9th switch (S9) and the tenth switch (S10) closure; The first current source converter (CSC1) is injected the electric current of filter capacitor and then is changed the voltage on filter capacitor by change, and this voltage acts on the inferior limit of transformer, thereby distortion that can compensation network voltage improves the supply power voltage quality of load end; Simultaneously the first current source (Idc) discharges and recharges superconducting magnet, with the electric current that maintains superconducting magnet near set-point;
(3) when circuit overcurrent being detected, all switches of the first current source converter (CSC1) are all closed, and minion is closed (S7), the 8th switch (S8), the 9th switch (S9), the tenth switch (S10) disconnection; If the amplitude of line current does not surpass the electric current of superconducting magnet, all line currents are not by the first current source converter (CSC1) to control the form of the rectification superconducting magnet of flowing through, and superconducting magnet is sealed in electrical network, thereby plays the effect of failure current limit; If line current has surpassed the electric current of superconducting magnet, the part not exceeding is still by the first current source converter (CSC1) superconducting magnet of flowing through, and the part exceeding, owing to lacking path, induces high voltage, puncture piezo-resistance, by piezo-resistance, carry out earial drainage and discharge overshoot energy; Piezo-resistance is the puncture voltage to piezo-resistance by the voltage clamp inducing simultaneously, thereby guarantees that the first current source converter (CSC1) is unlikely to damage because of overvoltage; When the amplitude of line current drops under superconducting magnet current value, all electric currents all will flow through superconducting magnet not control the form of rectification, thereby fault current is afterwards played to restriction completely; And the first current source (Idc) discharges to superconducting magnet, so that the electric current of superconducting magnet is remained in safe scope.
3. a superconducting current-limiting energy storage circuit, in described superconducting current-limiting energy storage circuit: the first switch (S1), second switch (S2), the 3rd switch (S3) and the 4th switch (S4) form the first current source converter (CSC1); The negative electrode of the 4th switch (S4) is connected with the anode of the first switch (S1), and its tie point is the first interchange tie point (PA1); The negative electrode of the 3rd switch (S3) is connected with the anode of second switch (S2), and its tie point is the second interchange tie point (PA2); The first switch (S1) is connected with the negative electrode of second switch (S2), and its tie point is the first direct current tie point (PD1); The 3rd switch (S3) is connected with the anode of the 4th switch (S4), and its tie point is the second direct current tie point (PD2); The 5th switch (S5), the 6th switch (S6), minion close (S7) and the 8th switch (S8) forms the second current source converter (CSC2); The negative electrode of the 8th switch (S8) is connected with the anode of the 5th switch (S5), and its tie point is the 3rd interchange tie point (PA3); The negative electrode that minion is closed (S7) is connected with the anode of the 6th switch (S6), and its tie point is the 4th interchange tie point (PA4); The 5th switch (S5) is connected with the negative electrode of the 6th switch (S6), and its tie point is the 3rd direct current tie point (PD3); Minion is closed (S7) and is connected with the anode of the 8th switch (S8), and its tie point is the 4th direct current tie point (PD4); The 9th switch (S9), the tenth switch (S10), the 11 switch (S11) and twelvemo are closed (S12) and are formed the 3rd current source converter (CSC3); The negative electrode that twelvemo is closed (S12) is connected with the anode of the 9th switch (S9), and its tie point is the 5th interchange tie point (PA5); The negative electrode of the 11 switch (S11) is connected with the anode of the tenth switch (S10), and its tie point is the 6th interchange tie point (PA6); The 9th switch (S9) is connected with the negative electrode of the tenth switch (S10), and its tie point is the 5th direct current tie point (PD5); The 11 switch (S11) is connected with the anode that twelvemo is closed (S12), and its tie point is the 6th direct current tie point (PD6); The two ends of superconducting magnet (Lsc) are connected with the 7th direct current tie point (PD7) with the second direct current tie point (PD2) respectively; The outflow of bus current end of the first current source (Idc) is connected with the 7th direct current tie point (PD7), and the electric current of the first current source flows into end and is connected with the 5th direct current tie point (PD5); The first direct current tie point (PD1) is connected with the 4th direct current tie point (PD4); The 3rd direct current tie point (PD3) is connected with the 6th direct current tie point (PD6); The anode of the 13 switch (S13) is connected with the first direct current tie point (PD1), and the negative electrode of the 13 switch (S13) is connected with the second direct current tie point (PD2); The anode of the 14 switch (S14) is connected with the 3rd direct current tie point (PD3), and the negative electrode of the 14 switch (S14) is connected with the 4th direct current tie point (PD4); The anode of the 15 switch (S15) is connected with the 5th direct current tie point (PD5), the negative electrode of the 15 switch (S15) is connected with the 6th direct current tie point (PD6), it is characterized in that, one end of the first filter capacitor (C1) is connected with one end that sixteenmo closes (S16); The other end of the first filter capacitor (C1) exchanges tie point (PA1) and is connected with first; The other end of sixteenmo pass (S16) exchanges tie point (PA2) and is connected with second; The two ends on the inferior limit of the first single-phase transformer (Tr1) exchange respectively tie point (PA1) and exchange tie point (PA2) with second and be connected with first; The two ends of the first piezo-resistance (V1) exchange respectively tie point (PA1) and exchange tie point (PA2) with second and be connected with first; One end of the second filter capacitor (C2) is connected with one end that the tenth minion is closed (S17); The other end of the second filter capacitor (C2) exchanges tie point (PA3) and is connected with the 3rd; The other end of the tenth minion pass (S17) exchanges tie point (PA4) and is connected with the 4th; The two ends on the inferior limit of the second single-phase transformer (Tr2) exchange respectively tie point (PA3) and exchange tie point (PA4) with the 4th and be connected with the 3rd; The two ends of the second piezo-resistance (V2) exchange respectively tie point (PA3) and exchange tie point (PA4) with the 4th and be connected with the 3rd; One end of the 3rd filter capacitor (C3) is connected with one end that eighteenmo closes (S18); The other end of the 3rd filter capacitor (C3) exchanges tie point (PA5) and is connected with the 5th; The other end of eighteenmo pass (S18) exchanges tie point (PA6) and is connected with the 6th; The two ends on the 3rd inferior limit of single-phase transformer (Tr3) exchange respectively tie point (PA5) and exchange tie point (PA6) with the 6th and be connected with the 5th; The two ends of the 3rd piezo-resistance (V3) exchange respectively tie point (PA5) and exchange tie point (PA6) with the 6th and be connected with the 5th; The two ends on the former limit of the first single-phase transformer (Tr1) are connected with one end of first-phase load (Z1) with one end of electrical network first-phase power supply (Us1) respectively; The two ends on the former limit of the second single-phase transformer (Tr2) are connected with one end of second-phase load (Z2) with one end of electrical network second-phase power supply (Us2) respectively; The two ends on the 3rd former limit of single-phase transformer (Tr3) are connected with one end of third phase load (Z3) with one end of electrical network third phase power supply (Us3) respectively; Described the first switch (S1), second switch (S2), the 3rd switch (S3), the 4th switch (S4), the 5th switch (S5), the 6th switch (S6), minion are closed (S7), the 8th switch (S8), the 9th switch (S9), the tenth switch (S10), the 11 switch (S11), twelvemo pass (S12), the 13 switch (S13), the 14 switch (S14) and the 15 switch (S15) and are inverse-impedance type switch, or substitute described inverse-impedance type switch with the contrary diode of type switch series connection of leading; Sixteenmo closes (S16), the tenth minion closes (S17) and eighteenmo pass (S18) is bidirectional switch.
4. according to superconducting current-limiting energy storage circuit claimed in claim 3, it is characterized in that for the control method of described superconducting current-limiting energy storage circuit as follows:
(1) when system just starts, all switches are all closed, and now the voltage drop value on transformer time limit is close to zero, and superconducting current-limiting energy storage circuit is on the not impact of the voltage of load; Now the first current source (Idc) superconducting magnet charging, makes the Current rise of superconducting magnet near set-point;
(2), under normal condition, the 13 switch (S13), the 14 switch (S14) and the 15 switch (S15) disconnect; Sixteenmo closes (S16), the tenth minion closes (S17) and eighteenmo closes (S18) closure; The first current source converter (CSC1), the second current source converter (CSC2) and the 3rd current source converter (CSC3) are injected the electric current of filter capacitor and then are changed the voltage on filter capacitor by change, this voltage acts on the inferior limit of transformer, thereby distortion that can compensation network voltage, improves the supply power voltage quality of load end; Simultaneously the first current source (Idc) discharges and recharges superconducting magnet, with the electric current that maintains superconducting magnet near set-point;
(3) when circuit overcurrent being detected, all switches of the first current source converter (CSC1), the second current source converter (CSC2) and the 3rd current source converter (CSC3) are all closed, and the 13 switch (S13), the 14 switch (S14), the 15 switch (S15), sixteenmo close (S16), the tenth minion closes (S17) and eighteenmo closes (S18) disconnection; If the amplitude of line current does not surpass the electric current of superconducting magnet, all line currents by the first current source converter (CSC1), the second current source converter (CSC2) and the 3rd current source converter (CSC3) not control the form of the rectification superconducting magnet of flowing through, superconducting magnet is sealed in electrical network, thereby plays the effect of failure current limit; If line current has surpassed the electric current of superconducting magnet, the part not exceeding is still by the first current source converter (CSC1), the second current source converter (CSC2) and the 3rd current source converter (CSC3) superconducting magnet of flowing through, the part exceeding is owing to lacking path, induce high voltage, puncture piezo-resistance, by piezo-resistance, carry out earial drainage and discharge overshoot energy; Piezo-resistance is the puncture voltage to piezo-resistance by the voltage clamp inducing simultaneously, thereby guarantees that the first current source converter (CSC1), the second current source converter (CSC2) and the 3rd current source converter (CSC3) are unlikely to damage because of overvoltage; When the amplitude of line current drops under superconducting magnet current value, all electric currents all will flow through superconducting magnet not control the form of rectification, thereby fault current is afterwards played to restriction completely; And the first current source (Idc) discharges to superconducting magnet, so that the electric current of superconducting magnet is remained in safe scope.
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| CN102005998B (en) * | 2010-11-23 | 2012-07-18 | 中国科学院电工研究所 | Low-voltage ride through circuit of double-feed type wind power generator |
| CN102231522B (en) * | 2011-07-01 | 2013-11-06 | 中国科学院电工研究所 | Power flow controller with failure current limiting function |
| CN103066580B (en) * | 2012-10-30 | 2015-09-16 | 中国科学院电工研究所 | A kind of error protection for wind energy turbine set and energy stabilization circuit |
| CN102969705B (en) * | 2012-11-08 | 2015-01-21 | 中国科学院电工研究所 | Fault current limiter |
| CN103606924B (en) * | 2013-11-14 | 2015-10-21 | 广东电网公司电力科学研究院 | A kind of dynamic voltage compensation device and method |
| CN104600693B (en) * | 2015-01-07 | 2017-01-18 | 中国科学院电工研究所 | Energy storage breaker for direct current power grid |
| CN104600717A (en) * | 2015-01-07 | 2015-05-06 | 中国科学院电工研究所 | Series current source controller |
| CN105140968B (en) * | 2015-10-23 | 2017-11-14 | 武汉大学 | A kind of micro-capacitance sensor transient performance intensifying device and method for coordinating control based on failure current limit fast energy storage |
| CN105743370B (en) * | 2016-03-29 | 2019-05-03 | 中国科学院电工研究所 | A kind of superconducting energy storage current transformer and its modulation system |
| EP3605813A1 (en) * | 2018-07-30 | 2020-02-05 | Fronius International GmbH | Inverter with intermediate circuit protection |
| CN112039101B (en) * | 2020-08-31 | 2022-06-21 | 广东电网有限责任公司广州供电局 | Voltage quality regulator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5021716A (en) * | 1990-05-18 | 1991-06-04 | Gte Products Corporation | Forward inverter ballast circuit |
| CN201466723U (en) * | 2009-06-03 | 2010-05-12 | 洛阳新思路电气股份有限公司 | Electric device for improving quality of working power grid of electric arc furnace |
| CN101707366A (en) * | 2009-11-27 | 2010-05-12 | 中国科学院电工研究所 | Inter-wire superconducting current-limiting tank circuits |
-
2010
- 2010-06-18 CN CN201010209714.5A patent/CN101872965B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5021716A (en) * | 1990-05-18 | 1991-06-04 | Gte Products Corporation | Forward inverter ballast circuit |
| CN201466723U (en) * | 2009-06-03 | 2010-05-12 | 洛阳新思路电气股份有限公司 | Electric device for improving quality of working power grid of electric arc furnace |
| CN101707366A (en) * | 2009-11-27 | 2010-05-12 | 中国科学院电工研究所 | Inter-wire superconducting current-limiting tank circuits |
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