WO2021115101A1 - 一种中高压双向全固态直流断路器及其高电位供能装置 - Google Patents

一种中高压双向全固态直流断路器及其高电位供能装置 Download PDF

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Publication number
WO2021115101A1
WO2021115101A1 PCT/CN2020/130465 CN2020130465W WO2021115101A1 WO 2021115101 A1 WO2021115101 A1 WO 2021115101A1 CN 2020130465 W CN2020130465 W CN 2020130465W WO 2021115101 A1 WO2021115101 A1 WO 2021115101A1
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branch
current
igbt
circuit
circuit breaker
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PCT/CN2020/130465
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English (en)
French (fr)
Inventor
施小东
陈鹏
施秦峰
祝建军
郑立成
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浙江大维高新技术股份有限公司
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Priority claimed from CN201911280168.1A external-priority patent/CN110943440A/zh
Priority claimed from CN201922232789.4U external-priority patent/CN211655738U/zh
Application filed by 浙江大维高新技术股份有限公司 filed Critical 浙江大维高新技术股份有限公司
Publication of WO2021115101A1 publication Critical patent/WO2021115101A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured

Definitions

  • the invention belongs to the field of DC medium and high voltage electrical appliances, and particularly relates to a medium and high voltage bidirectional all-solid DC circuit breaker and a high-potential energy supply device thereof.
  • Voltage source type rectifier/inverter devices are often used in DC power distribution fields such as ships, airplanes, DC power grids, and multi-terminal DC transmission.
  • DC circuit breakers are mainly divided into mechanical DC circuit breakers, all solid-state DC circuit breakers and hybrid DC circuit breakers.
  • Mechanical DC circuit breakers use mechanical switches to cut off the DC current, with high shut-off capability, but they need to create a manual The zero-crossing point and the arc-extinguishing operating point are difficult to accurately grasp, and the repeatability is also poor, and the breaking time requires tens of milliseconds and is limited by the long mechanical stroke, which cannot meet the technical requirements of the DC power grid.
  • Hybrid DC circuit breakers combine mechanical switches and power electronic devices, and have the advantages of low on-state loss and no arcing, but their structure is complex, the volume is large, and the fault current removal time is a few milliseconds, resulting in large fault current peaks , It is difficult to meet the application requirements of some special industries. All solid-state DC circuit breakers use high-power semiconductor devices to directly break the DC current. The breaking time is short and there is no arc, but the on-state loss is large and the cost is high.
  • the prior art addresses the defects of large on-state loss and high cost of all solid-state DC circuit breakers.
  • a new all-solid-state DC circuit breaker with low on-state loss, fast turn-off speed, consistency of series power electronic devices and good voltage equalization effect, and reliable turn-off overvoltage and energy absorption is proposed.
  • the patent authorization announcement number is CN104242265B.
  • the patent name is an all-solid-state DC circuit breaker for DC distribution network, and its main circuit structure is that the DC circuit breaker is composed of an auxiliary circuit breaker circuit, a main circuit breaker circuit and an energy absorption circuit in parallel.
  • the auxiliary circuit breaker circuit includes series-connected thyristor switch units and modular full-control device switch units; the main circuit breaker circuit includes multiple press-fit full-control device switch units, arresters and fuses, and adopts a diode bridge structure to achieve bidirectional current flow. ;
  • the energy absorption circuit includes at least one lightning arrester.
  • the all-solid-state DC circuit breaker constructed by the invention has a novel topological structure, comprehensive functions, low on-state loss during normal operation, can quickly detect the current state and effectively identify the fault, and can realize the interruption of bidirectional current when the fault occurs, and the current level is high.
  • the fault clearing speed is fast, the overvoltage and energy absorption effect during the shutdown process are good, the fault current rise rate is effectively limited, and the series valve group of the main circuit breaker circuit and the full control device of the auxiliary circuit breaker circuit are reliably protected.
  • a fuse must be used to cut off the fault current to protect the valve group components from damage.
  • the present invention provides a medium and high voltage bidirectional all-solid-state DC circuit breaker and its high potential energy supply, which has large current removal capability, does not increase system cost significantly, and can flow bidirectionally. Device.
  • a medium and high voltage bidirectional all-solid-state DC circuit breaker including a mechanical isolating switch, a current-limiting inductor, a rated current path branch and a fault current removal branch, a rated current path branch and a fault current removal branch
  • the branches are connected in parallel;
  • the rated current path branch includes series-connected power electronic switch components and IGBT components.
  • the power electronic switch components are composed of several groups of thyristor units connected in series.
  • Each group of thyristor units consists of a forward thyristor, a DC voltage equalizing branch, The dynamic voltage equalization branch and the inverted thyristor are connected in parallel;
  • the IGBT component includes several groups of IGBT units connected in parallel;
  • the fault current removal branch includes several groups of IGBT units connected in series;
  • the IGBT unit includes a full-bridge IGBT module bidirectional A current flow branch and an energy absorption branch, the full-bridge IGBT module bidirectional current flow branch is connected in parallel with the energy absorption branch, the bridge arm of the IGBT module bidirectional current flow branch is an IGBT module, and the two ends of the IGBT module are connected with RCD Protect the absorption branch and have a DC voltage equalization resistor.
  • the mechanical isolation switch is used to isolate the power supply, disconnect the circuit without load current, and has no arc extinguishing ability.
  • the current-limiting inductor is used to suppress transient currents, and the faster the rate of change of the current, the more obvious the suppression effect.
  • the size of its inductance depends on the requirements of the stable operation of the system. Under normal circumstances, the rated current path branch bears all load currents and is always in a conducting state. Due to the small on-state voltage drop of the power electronic switch components and IGBT components, the loss of the DC circuit breaker is low, and the overall operating efficiency of the power supply system will not be affected.
  • the series-connected IGBT unit of the fault current removal branch is immediately triggered to turn on, and then the parallel IGBT unit of the rated current path branch enters the off state, and the current starts to transfer to the fault current removal branch.
  • the power electronic switch component After the thyristor current of the power electronic switch component drops to zero, the power electronic switch component also enters the off state.
  • the power electronic switch component has the ability to withstand high voltage due to the characteristics of the thyristor.
  • the DC voltage equalizing branch and the dynamic voltage equalizing branch of the thyristor unit are connected in parallel with the thyristor, which slows the rising speed of the voltage at both ends of the thyristor and reduces the loss of the device.
  • the series IGBT unit of the fault current removal branch After the fault current is transferred to the fault current removal branch, the series IGBT unit of the fault current removal branch enters the off state. Due to the large current in the main circuit, there is a lot of energy stored in the current-limiting inductor, and the arc energy cannot disappear immediately.
  • the energy absorption branch of the series-connected IGBT unit of the fault current removal branch begins to absorb and discharge this energy.
  • the IGBT module is an insulated gate bipolar transistor module, and the design of the full-bridge IGBT module bidirectional current flow branch can make the upper and lower two groups of IGBT modules each bear half of the load current. Therefore, the short-circuit fault breaking current capacity is doubled, which has a large Current removal capability.
  • the RCD protection and absorption branch connected at both ends of the IGBT module can slow down the voltage rise speed when the IGBT module is turned off, reduce the turn-off loss, and discharge the residual energy in the system more quickly.
  • the DC voltage equalization resistor guarantees each IGBT The voltage drop on both ends of the IGBT module of the unit is basically the same, and it can help to discharge the discharge energy.
  • the IGBT module is a crimp type IGBT module.
  • crimping IGBTs use pressure to achieve thermodynamic and electrical connection and ensure double-sided heat dissipation.
  • the power cycle capability of the crimping type IBGT device is very strong, far better than the welding type IGBT module.
  • the thyristor assembly includes multiple groups of thyristor units.
  • the on-state resistance of the thyristor switch is very small, m ⁇ level, the withstand voltage is very high, about 8kV, the turn-off time is short, about one hundredth of the mechanical switch, the fault current removal time is shorter, the short-circuit current peak value is smaller, and the arc is extinguished.
  • the energy is greatly reduced, the price is lower, and the thyristor component is used as the overcurrent cut-off of the circuit breaker, and the system cost will not increase significantly.
  • the energy absorption branch includes a DC capacitor and a MOV zinc oxide arrester in parallel.
  • the MOV zinc oxide arrester will act to quickly discharge the discharge energy and protect the IGBT unit from damage.
  • the RCD protection absorption branch includes a diode, a resistor, and a DC capacitor, and the resistor is connected in parallel with the diode and then connected in series with the DC capacitor.
  • the RCD protection absorption branch can slow down the voltage rising speed when the IGBT module is turned off, and reduce the turn-off loss.
  • a high-potential energy supply device which includes a PMW pulse width modulation rectifier circuit, a filter capacitor, a full-bridge inverter circuit, a resonant capacitor component, a magnetic ring transformer, a full-bridge rectifier diode component, and a high voltage Energy storage filter capacitor, bleeder resistor, DC voltage converter; the PMW pulse width modulation rectifier circuit, filter capacitor, and full-bridge inverter circuit are connected in parallel in sequence; the PMW pulse width modulation rectifier circuit includes an AC side inductor and an IGBT A three-phase half-bridge circuit composed of modules; the bridge arm of the full-bridge inverter circuit is an IGBT module; the output end of the full-bridge inverter circuit is connected to the input end of the resonant capacitor component; the output end of the resonant capacitor component is connected to the magnetic The primary loop of the toroidal transformer is connected, and the leakage inductance of the resonant capacitor component and the magnetic toroid
  • the secondary circuit of the magnetic ring transformer is connected to the input end of the full-bridge rectifier diode assembly, the full-bridge rectifier diode assembly, the high-voltage energy storage filter capacitor, and the bleeder resistor are connected in parallel in sequence, and the output end of the bleeder resistor is connected to the DC voltage converter.
  • the PMW pulse width modulation rectifier circuit rectifies the three-phase alternating current into direct current.
  • the full-bridge inverter circuit After passing through the filter capacitor, the full-bridge inverter circuit resonates through the leakage inductance of the resonant capacitor component and the magnetic ring transformer, and reduces the high frequency of the low voltage side.
  • the pulse electric energy is transformed to the high-voltage side, and the full-bridge rectifier diode assembly is rectified to form a stable high-voltage direct current voltage, which is then transformed into the switching drive power required by the IGBT module by the direct-current voltage converter.
  • the number of magnetic ring transformers, full-bridge rectifier diode components, high-voltage energy storage filter capacitors, bleeder resistors, and DC voltage converters is the same as the number of IGBT modules in the all-solid DC circuit breaker.
  • the power supply of the device is three-phase alternating current, which is supplied separately from the DC power supply through which the solid-state DC circuit breaker passes. It is well isolated and will not be affected by the fault current of the solid-state DC circuit breaker, ensuring the appearance of the solid-state DC circuit breaker.
  • the stability of the control power supply during fault current; the power supplies after the transformation of each transformer are independent of each other, and the power supplies for the IGBT modules of the all-solid-state DC circuit breaker will not affect each other.
  • the frequency and voltage of the current are increased through the resonant capacitor component and the magnetic ring transformer. Due to the high-frequency operating frequency, the volume of the high-potential energy supply device is greatly reduced.
  • the LCC series-parallel resonant circuit can realize zero-voltage switching or zero-current switching of IGBT modules, reduce switching losses, increase switching frequency, and avoid technical problems such as turn-off over-voltage and bus voltage "virtual high” caused by hard-switching circuits. .
  • the bleeder resistor connected in parallel with the high-voltage energy storage filter capacitor can discharge the power in the capacitor more quickly when the high-potential energy supply device cuts off the power supply, which better protects the circuit and the safety of workers.
  • the magnetic toroidal transformer is a nanocrystalline or manganese-zinc ferrite magnetic toroidal transformer. This type of magnetic toroidal transformer can suppress low-frequency interference.
  • the present invention has the following beneficial effects:
  • the power electronic switch of the rated current path branch of the all-solid DC circuit breaker is composed of thyristors, the fault current removal time is shorter, the short-circuit current peak value is smaller, and the arc extinguishing energy is greatly reduced.
  • the thyristors are connected in parallel with a DC voltage equalization circuit and a dynamic DC voltage equalization. The circuit further protects the thyristor from damage.
  • the design of the bidirectional current-passing branch of the full-bridge IGBT module in the all-solid-state DC circuit breaker can make the upper and lower two groups of IGBT modules each bear half of the load current, so the short-circuit fault breaking current capacity is doubled. And each full-bridge IGBT module bidirectional current branch is connected in parallel with a DC capacitor and MOV zinc oxide arrester, which can absorb the residual electric energy in the line and quickly discharge it.
  • the RCD protection absorption branch connected at both ends of the IGBT module has a DC voltage equalization. The resistance that dissipates and discharges energy can slow down the voltage rising speed when the IGBT module is turned off, reduce the turn-off loss, and further protect the IGBT module from damage.
  • the input power of the high-potential function device is a three-phase AC power supply, which is supplied separately from the DC power supply through the all-solid-state DC circuit breaker, which is well isolated and will not be affected by the fault current of the all-solid-state DC circuit breaker, ensuring the solid-state DC
  • the stability of the control power supply when the circuit breaker has a fault current is independent of each other, and the power supplies for the IGBT modules of the all-solid-state DC circuit breaker will not affect each other.
  • the volume of the high-potential energy supply device is greatly reduced.
  • the bleeder resistor connected in parallel with the high-voltage energy storage filter capacitor in the high-potential function device can discharge the power in the capacitor more quickly when the high-potential energy supply device cuts off the power supply, which better protects the circuit and the safety of workers.
  • Figure 1 is a topological structure diagram of an all solid-state DC circuit breaker
  • Figure 2 is the topological structure diagram of the thyristor unit
  • Figure 3 is the topological structure diagram of the IGBT module, the RCD protection absorption branch, and the DC voltage equalizing resistor;
  • Fig. 4 is a topological structure diagram of the power electronic switch assembly of the second embodiment
  • Figure 5 Topological structure diagram of high-potential energy supply device.
  • a medium and high voltage bidirectional all-solid-state DC circuit breaker includes a mechanical isolating switch 1, a current-limiting inductor 2, a rated current path branch 3 and a fault current removal branch 4, with rated current Path branch 3 and fault current removal branch 4 are connected in parallel; mechanical isolating switch 1 is used to isolate the power supply and disconnect the circuit with no load current, without arc extinguishing capability, and current-limiting inductor 2 is used to suppress transient currents, and to control the rate of change The faster the current, the more obvious the inhibitory effect.
  • the size of its inductance depends on the requirements of the stable operation of the system.
  • the rated current path branch 3 includes a power electronic switch component 5 and an IGBT component 6 connected in series.
  • the power electronic switch component 5 is composed of multiple groups of thyristor units 51 in series, and each group of thyristor units 51 consists of a forward thyristor and a DC voltage equalizing branch 52 ,
  • the dynamic voltage equalization branch 53 and the reverse thyristor are connected in parallel; the on-state resistance of the thyristor switch is very small, m ⁇ level, the withstand voltage is very high, about 8kV, and the turn-off time is short, about one hundredth of the mechanical switch.
  • the fault current removal time is shorter, the short-circuit current peak value is smaller, and the arc extinguishing energy is greatly reduced.
  • the IGBT assembly 6 includes multiple groups of IGBT units 7 connected in parallel; the fault current removal branch 4 includes multiple groups of IGBT units 7 connected in series; the IGBT unit 7 includes a full-bridge IGBT module bidirectional current branch and an energy absorption branch
  • the bridge arms of the bidirectional current-passing branch of the IGBT module are crimped IGBT module 8
  • the IGBT module 8 is an insulated gate bipolar transistor module, and the two ends of the IGBT module 8 are connected with the RCD protection absorption branch 9 and the DC equalizer.
  • Piezoresistor 10 10.
  • the RCD protection absorption branch 9 includes a diode, a resistor, and a DC capacitor. The resistor is connected in parallel with the diode and then connected in series with the DC capacitor.
  • the DC voltage equalization resistor 10 ensures that the two ends of the IGBT module 8 of each IGBT unit 7 are The pressure drop is basically the same, and it can help to discharge the discharge energy.
  • the bidirectional current-passing branch of the full-bridge IGBT module is connected in parallel with an energy absorbing branch, and the energy absorbing branch includes a DC capacitor and a MOV zinc oxide arrester connected in parallel.
  • the MOV zinc oxide arrester When the residual electric energy in the circuit is charged to the DC capacitor, if the voltage insulation between the two ends of the DC capacitor is matched, the MOV zinc oxide arrester will act to quickly discharge the discharge energy and protect the IGBT unit 7 from damage.
  • the design of the bidirectional current-passing branch of the full-bridge IGBT module can make the upper and lower two groups of IGBT modules 8 each bear half of the load current. Therefore, the short-circuit fault breaking current capacity is doubled.
  • the rated current path branch 3 bears all the load current and is always in a conducting state. Since the on-state voltage drop of the power electronic switch assembly 5 and the IGBT assembly 6 is small, the loss of the DC circuit breaker is low, and the overall operating efficiency of the power supply system will not be affected.
  • the series IGBT unit 7 of the fault current cutoff branch 4 is immediately triggered to turn on, and then the parallel IGBT unit 7 of the rated current path branch 3 enters the off state, and the current starts to cut off the fault current After the branch 4 is transferred, after the thyristor current of the power electronic switch assembly 5 drops to zero, the power electronic switch assembly 5 also enters the off state.
  • the power electronic switch assembly 5 has the ability to withstand high voltage due to the characteristics of the thyristor.
  • the DC voltage equalization branch 52 and the dynamic voltage equalization branch 53 of the thyristor unit 51 are connected in parallel with the thyristor, which slows the rising speed of the voltage at both ends of the thyristor and reduces the loss of the device.
  • the series IGBT unit 7 of the fault current removal branch 4 enters the off state. Due to the large current in the main circuit, the energy stored in the current limiting inductor 2 is large, and the arc energy If it cannot disappear immediately, the energy absorption branch of the series-connected IGBT unit 7 of the fault current removal branch 4 begins to absorb and discharge the energy.
  • a medium and high voltage bidirectional all-solid-state DC circuit breaker includes a mechanical isolating switch 1, a current-limiting inductor 2, a rated current path branch 3 and a fault current removal branch 4 ,
  • the rated current path branch 3 and the fault current removal branch 4 are connected in parallel;
  • the mechanical isolating switch 1 is used to isolate the power supply and disconnect the circuit without load current, without arc extinguishing ability, and the current-limiting inductor 2 is used to suppress the transient current, and The faster the rate of change of the current, the more obvious the inhibitory effect.
  • the size of its inductance depends on the requirements of the stable operation of the system.
  • the rated current path branch 3 includes a power electronic switch component 5 and an IGBT component 6 connected in series.
  • the power electronic switch component 5 includes multiple sets of series-connected thyristors and two pairs of diodes connected to the rated current path branch 3, each group of thyristors are connected in parallel
  • the two pairs of diodes ensure that the current can flow in both directions.
  • the power electronic switch assembly 5 can reduce the number of thyristor devices by half, saving costs.
  • the on-state resistance of the thyristor switch is very small, m ⁇ level, the withstand voltage is very high, about 8kV, the turn-off time is short, about one hundredth of the mechanical switch, the fault current removal time is shorter, the short-circuit current peak value is smaller, and the arc is extinguished The energy is greatly reduced.
  • the IGBT assembly 6 includes multiple groups of IGBT units 7 connected in parallel; the fault current removal branch 4 includes multiple groups of IGBT units 7 connected in series; the IGBT unit 7 includes a full-bridge IGBT module bidirectional current branch and an energy absorption branch
  • the bridge arms of the bidirectional current-passing branch of the IGBT module are crimped IGBT module 8
  • the IGBT module 8 is an insulated gate bipolar transistor module, and the two ends of the IGBT module 8 are connected with the RCD protection absorption branch 9 and the DC equalizer.
  • Piezoresistor 10 10.
  • the RCD protection absorption branch 9 includes a diode, a resistor, and a DC capacitor. The resistor is connected in parallel with the diode and then connected in series with the DC capacitor.
  • the DC voltage equalization resistor 10 ensures that the two ends of the IGBT module 8 of each IGBT unit 7 are The pressure drop is basically the same, and it can help to discharge the discharge energy.
  • the bidirectional current-passing branch of the full-bridge IGBT module is connected in parallel with an energy absorbing branch, and the energy absorbing branch includes a DC capacitor and a MOV zinc oxide arrester connected in parallel.
  • the MOV zinc oxide arrester When the residual electric energy in the circuit is charged to the DC capacitor, if the voltage insulation between the two ends of the DC capacitor is matched to the level, the MOV zinc oxide arrester will act to quickly discharge the discharge energy and protect the IGBT unit 7 from damage.
  • the design of the bidirectional current-passing branch of the full-bridge IGBT module can make the upper and lower two groups of IGBT modules 8 each bear half of the load current. Therefore, the short-circuit fault breaking current capacity is doubled.
  • the rated current path branch 3 bears all the load current and is always in a conducting state. Since the on-state voltage drop of the power electronic switch assembly 5 and the IGBT assembly 6 is small, the loss of the DC circuit breaker is low, and the overall operating efficiency of the power supply system will not be affected.
  • the series IGBT unit 7 of the fault current cutoff branch 4 is immediately triggered to turn on, and then the parallel IGBT unit 7 of the rated current path branch 3 enters the off state, and the current starts to cut off the fault current After the branch 4 is transferred, after the thyristor current of the power electronic switch assembly 5 drops to zero, the power electronic switch assembly 5 also enters the off state.
  • the power electronic switch assembly 5 has the ability to withstand high voltage due to the characteristics of the thyristor.
  • the DC voltage equalizing branch 52 and the dynamic voltage equalizing branch 53 of the thyristor unit 51 are connected in parallel with the thyristor, which slows the rising speed of the voltage at both ends of the thyristor and reduces the loss of the device.
  • the series IGBT unit 7 of the fault current removal branch 4 enters the off state. Due to the large current in the main circuit, the energy stored in the current limiting inductor 2 is large, and the arc energy If it cannot disappear immediately, the energy absorption branch of the series-connected IGBT unit 7 of the fault current removal branch 4 begins to absorb and discharge the energy.
  • the rated current path branch 3 bears all the load current and is always in a conducting state. Since the on-state voltage drop of the power electronic switch assembly 5 and the IGBT assembly 6 is small, the loss of the DC circuit breaker is low, and the overall operating efficiency of the power supply system will not be affected.
  • the series IGBT unit 7 of the fault current cutoff branch 4 is immediately triggered to turn on, and then the parallel IGBT unit 7 of the rated current path branch 3 enters the off state, and the current starts to cut off the fault current After the branch 4 is transferred, after the thyristor current of the power electronic switch assembly 5 drops to zero, the power electronic switch assembly 5 also enters the off state.
  • the power electronic switch assembly 5 has the ability to withstand high voltage due to the characteristics of the thyristor.
  • the DC voltage equalizing branch 52 and the dynamic voltage equalizing branch 53 of the thyristor unit 51 are connected in parallel with the thyristor, which slows the rising speed of the voltage at both ends of the thyristor and reduces the loss of the device.
  • the series IGBT unit 7 of the fault current removal branch 4 enters the off state. Due to the large current in the main circuit, the energy stored in the current limiting inductor 2 is large, and the arc energy If it cannot disappear immediately, the energy absorption branch of the series-connected IGBT unit 7 of the fault current removal branch 4 begins to absorb and discharge the energy.
  • a high-potential energy supply device includes a PMW pulse width modulation rectifier circuit 11, a filter capacitor, a full-bridge inverter circuit 12, a resonant capacitor component 15, a magnetic ring transformer 16, a full-bridge rectifier diode component 14, High-voltage energy storage filter capacitors, bleeder resistors, and DC voltage converters; the power supply of the device is three-phase AC, which is supplied separately from the DC power supply through the all-solid DC circuit breaker, which is well isolated and will not be affected by all-solid-state DC circuit breakers.
  • the influence of the fault current of the DC circuit breaker guarantees the stability of the control power supply when the solid state DC circuit breaker has a fault current.
  • the PMW pulse width modulation rectifier circuit 11, the filter capacitor, and the full-bridge inverter circuit 12 are connected in parallel in sequence;
  • the PMW pulse width modulation rectifier circuit 11 includes a three-phase half-bridge circuit composed of an AC side inductor and an IGBT module;
  • the bridge arm of the full-bridge inverter circuit 12 is an IGBT module;
  • the output end of the full-bridge inverter circuit 12 is connected to the input end of the resonant capacitor component 15;
  • the output end of the resonant capacitor component 15 is connected to the primary circuit of the magnetic ring transformer 16
  • the leakage inductance of the resonant capacitor component 15 and the magnetic ring transformer 16 forms an LCC series-parallel resonant circuit 13.
  • the toroidal magnetic transformer 16 is a nanocrystalline or manganese-zinc ferrite magnetic toroidal transformer, and this type of magnetic toroidal transformer 16 can suppress low-frequency interference.
  • the power supplies after transformation of each transformer are independent of each other, and the power supplies for supplying power to the IGBT module 8 of the all-solid-state DC circuit breaker will not affect each other.
  • the LCC series-parallel resonance circuit 13 increases the frequency and voltage of the current, which can greatly reduce the volume of the high-potential energy supply device.
  • the LCC series-parallel resonant circuit 13 can realize zero-voltage switching or zero-current switching of IGBT modules, reduce switching losses, increase switching frequency, and can also avoid the turn-off overvoltage and bus voltage "virtual high" caused by hard switching circuits. problem.
  • the secondary circuit of the magnetic ring transformer 16 is connected to the input end of the full-bridge rectifier diode assembly 14.
  • the full-bridge rectifier diode assembly 14, the high-voltage energy storage filter capacitor, and the bleeder resistor are connected in parallel in sequence, and the bleeder resistor is connected to the high-potential energy supply device. When the power supply is cut off, the electricity in the capacitor can be discharged more quickly, which better protects the circuit and the safety of workers.
  • the output end of the bleeder resistor is connected to the DC voltage converter.
  • the output end of the DC voltage converter provides the switching drive power required by the IGBT module 8 of the all-solid DC circuit breaker.
  • the number of magnetic ring transformer 16, full-bridge rectifier diode assembly 14, high-voltage energy storage filter capacitor, bleeder resistor, and DC voltage converter is the same as the number of IGBT modules in the all-solid DC circuit breaker.

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Abstract

本发明提供一种具备大电流切除能力，系统成本不会大幅增加，可双向通流的中高压双向全固态直流断路器及其高电位供能装置。属于直流中高压电器领域。包括机械隔离开关、限流电感、额定电流通路支路和故障电流切除支路。其中，额定电流通路支路和故障电流切除支路并联；额定电流通路支路包括串联的电力电子开关组件和IGBT组件，电力电子开关组件由若干组晶闸管单元串联而成，故障电流切除支路包括若干组IGBT单元串联而成。IGBT单元为全桥双向通流拓扑结构，可以实现电流双向流通也可以让故障电流通流能力扩大一倍。高电位供能装置采用三相交流电变换为高频高压直流电源，为全固态直流断路器的IGBT模块驱动供电，大大减小了该供能装置的体积。

Description

一种中高压双向全固态直流断路器及其高电位供能装置 技术领域
本发明属于直流中高压电器领域，具体涉及一种中高压双向全固态直流断路器及其高电位供能装置。
背景技术
在船舶、飞机、直流电网、多端直流输电等直流配电领域中，经常采用电压源型整流/逆变装置。现如今的直流断路器主要分为机械式直流断路器、全固态直流断路器和混合式直流断路器，机械式直流断路器采用机械开关来切断直流电流，关断能力高，但是需要创造一个人工过零点，灭弧工作点很难精准把握，可重复性也很差，而且开断时间需要几十毫秒受限于机械行程较长，不能满足直流电网的技术要求。混合式直流断路器结合了机械开关和电力电子器件，具有通态损耗小和无拉弧的优点，但是其结构复杂，体积较大，故障电流的切除时间为几毫秒，导致故障电流峰值较大，很难满足某些特殊行业的应用要求。全固态直流断路器是利用大功率半导体器件直接分断直流电流，分断时间短，无电弧，但通态损耗大，成本高。
现有技术中针对全固态直流断路器通态损耗大、成本高的缺陷。提出了一种通态损耗低、关断速度快、串联电力电子器件一致性和均压效果好、关断过电压和能量可靠吸收的新型全固态直流断路器，例如专利授权公告号为CN104242265B，专利名称为一种直流配电网全固态直流断路器，其主要线路结构为该直流断路器由辅助断路器回路、主断路器回路和能量吸收回路三者并联组成。其中，辅助断路器回路包括串联的晶闸管开关单元和模块化全控器件开关单元；主断路器回路包括多个压装全控器件开关单元、避雷器和熔断器，采用二极管桥式结构实现双向通流；能量吸收回路包括至少一个避雷器。该发明构成的全固态直流断路器拓扑结构新颖，功能全面，正常运行时通态损耗较低，可迅速检测电流状态并有效识别故障，故障时可实现开断双向电流，关断电流等级高，故障清除速度快，关断过程中的过电压和能量吸收效果好，有效限制故障电流上升 率，对主断路器回路串联阀组和辅助断路器回路全控器件进行可靠保护。但是严重大电流故障情况下还得靠熔断器来切断故障电流，以保护阀组器件不受损坏。
发明内容
本发明针对现有技术中无法切断大电流故障的弊端，提供具备大电流切除能力，系统成本不会大幅增加，可双向通流的一种中高压双向全固态直流断路器及其高电位供能装置。
根据本发明的一个方面，提供了一种中高压双向全固态直流断路器，包括机械隔离开关、限流电感、额定电流通路支路和故障电流切除支路，额定电流通路支路和故障电流切除支路并联；所述额定电流通路支路包括串联的电力电子开关组件和IGBT组件，电力电子开关组件由若干组晶闸管单元串联而成，每组晶闸管单元由正向晶闸管、直流均压支路、动态均压支路和反向晶闸管并联而成；IGBT组件包括若干组IGBT单元并联而成；所述故障电流切除支路包括若干组IGBT单元串联而成；所述IGBT单元包括全桥IGBT模块双向通流支路和能量吸收支路，所述全桥IGBT模块双向通流支路并联能量吸收支路，所述IGBT模块双向通流支路的桥臂为IGBT模块，IGBT模块两端连接有RCD保护吸收支路和具有直流均压电阻。
上述方案中，机械隔离开关用于隔离电源，断开无负荷电流的电路，无灭弧能力，限流电感用于抑制瞬态电流，并且对变化率越快的电流，抑制作用越明显。其电感值的大小取决于系统稳定运行的要求。通常情况下，额定电流通路支路承担全部负载电流，一直处于导通状态。由于电力电子开关组件和IGBT组件的通态压降小，对直流断路器的损耗低，不会影响电源系统的总体运行效率。一旦主回路发生短路或故障电流升高，故障电流切除支路的串联IGBT单元立即触发导通，随后额定电流通路支路的并联IGBT单元进入关断状态，电流开始向故障电流切除支路转移，电力电子开关组件的晶闸管电流下降为零后，电力电子开关组件也进入关断状态，电力电子开关组件由于晶闸管的特性，具有承受高电压的能力。晶闸管单元的直流均压支路、动态均压支路与晶闸管并联，减缓了晶闸管两端电压的上升速度，减小器件损耗。故障电流在转移到故障电流切除支路后，故障电流切除支路的串联IGBT单元进入关断状态，由于主回路中的电流很大，限流电感上存储的能量很多，电弧能量不能立即消失，故障电流切除支路的串联 IGBT单元的能量吸收支路开始吸收、泄放这些能量。IGBT模块为绝缘栅双极型晶体管模块，且全桥IGBT模块双向通流支路的设计可以使上下两组IGBT模块各承担一半负载电流，因此，短路故障分断电流能力增加一倍，具备了大电流切除能力。IGBT模块两端连接的RCD保护吸收支路可以减缓IGBT模块关断时电压的上升速度，减小关断损耗，更快速的将系统中的残留能量泄放掉，直流均压电阻保证每个IGBT单元的IGBT模块两端所承受的压降基本相同，并且可以帮助泄放电能。
作为优选，所述IGBT模块为压接式IGBT模块。与传统的焊接式IGBT相比，压接式IGBT利用压力实现热力学和电气的连接，并保证了双面散热。压接式IBGT器件的功率循环能力很强，远优于焊接式IGBT模块。
作为优选，所述晶闸管组件包括多组晶闸管单元。晶闸管单元串联越多，晶闸管组件的耐高压能力越强。晶闸管开关的通态电阻很小，mΩ级、耐压很高约8kV、关断时间短，约为机械开关的一百分之一，故障电流切除时间更短，短路电流峰值更小，灭弧能量大大减小，价格较低，用晶闸管组件作为该断路器的过电流切断，系统成本不会大幅增加。
作为优选，所述能量吸收支路包括一个直流电容和一个MOV氧化锌避雷器并联组成。当线路中的残存电能往直流电容充电时，如果直流电容两端电压绝缘配合水平，MOV氧化锌避雷器动作，快速泄放电能，保护IGBT单元不受损坏。
作为优选，所述RCD保护吸收支路包括二极管、电阻、直流电容，其电阻与二极管并联后与直流电容串联。该RCD保护吸收支路可以减缓IGBT模块关断时电压的上升速度，减小关断损耗。
根据本发明的另一个方面，提供了一种高电位供能装置，包括PMW脉冲宽度调制整流电路、滤波电容、全桥逆变电路、谐振电容组件、磁环变压器、全桥整流二极管组件、高压储能滤波电容、泄放电阻、直流电压变换器；所述PMW脉冲宽度调制整流电路、滤波电容和全桥逆变电路依次并联；所述PMW脉冲宽度调制整流电路，包括交流侧的电感和IGBT模块组成的三相半桥电路；所述全桥逆变电路的桥臂为IGBT模块；所述全桥逆变电路输出端与谐振电容组件输入端相连；所述谐振电容组件的输出端与磁环变压器的一次回路相连，所述谐振电容组件和所述磁环变压器的漏感形成LCC串并联谐振电路。磁环变压器的二次回路 和全桥整流二极管组件输入端相连，所述全桥整流二极管组件、高压储能滤波电容、泄放电阻依次并联，泄放电阻的输出端和直流电压变换器相连。
上述方案中PMW脉冲宽度调制整流电路将三相交流电整流成直流电，通过滤波电容后，再经全桥逆变电路，通过谐振电容组件和磁环变压器的漏感发生谐振，将低压侧的高频脉冲电能变换到高压侧，全桥整流二极管组件整流后形成稳定的高压直流电压，再经直流电压变换器变换成IGBT模块所需的开关驱动电源。其中磁环变压器、全桥整流二极管组件、高压储能滤波电容、泄放电阻、直流电压变换器的数量与全固态直流断路器中IGBT模块的数量一致。该装置的供电电源为三相交流电，与全固态直流断路器经过的直流电源分开供电，很好的进行了隔离，不会受全固态直流断路器故障电流的影响，保障了固态直流断路器出现故障电流时的控制电源的稳定；每个变压器变压后的电源之间相互独立，给全固态直流断路器的IGBT模块供电的电源之间不会相互影响。经过谐振电容组件和磁环变压器提高了电流的频率和电压，由于采用了高频工作频率，该高电位供能装置的体积大大减小。LCC串并联谐振电路可以实现IGBT模块零电压开关或零电流开关，减小开关损耗，提高开关频率，而且还可以避免硬开关电路带来的关断过电压和母线电压“虚高”等技术难题。与高压储能滤波电容并联的泄放电阻在该高电位供能装置切断供电时可以更快速的将电容里的电量泄放掉，更好的保护电路和工作人员安全。
作为优选，所述磁环变压器为纳米晶或锰锌铁氧体磁环变压器。该类磁环变压器可以抑制低频干扰。
与现有技术相比，本发明具有以下有益效果：
全固态直流断路器额定电流通路支路的电力电子开关由晶闸管组成，故障电流切除时间更短，短路电流峰值更小，灭弧能量大大减小，晶闸管并联有直流均压回路和动态直流均压回路，更进一步的保护了晶闸管不受损坏。
全固态直流断路器额中全桥IGBT模块双向通流支路的设计可以使上下两组IGBT模块各承担一半负载电流，因此，短路故障分断电流能力增加一倍。且每个全桥IGBT模块双向通流支路并联有直流电容和MOV氧化锌避雷器，可以吸收线路中的残存电能并快速泄放，IGBT模块两端连接的RCD保护吸收支路和具 有直流均压和泄放电能的电阻可以减缓IGBT模块关断时电压的上升速度，减小关断损耗，进一步的保护IGBT模块不受损坏。
高电位功能装置的输入电源为三相交流电源，与全固态直流断路器经过的直流电源分开供电，很好的进行了隔离，不会受全固态直流断路器故障电流的影响，保障了固态直流断路器出现故障电流时的控制电源的稳定。每个变压器变压后的电源之间相互独立，给全固态直流断路器的IGBT模块供电的电源之间不会相互影响。
由于采用了高频工作频率，该高电位供能装置的体积大大减小。
高电位功能装置中与高压储能滤波电容并联的泄放电阻在该高电位供能装置切断供电时可以更快速的将电容里的电量泄放掉，更好的保护电路和工作人员安全。
附图说明
图1为全固态直流断路器拓扑结构图；
图2为晶闸管单元拓扑结构图；
图3为IGBT模块和RCD保护吸收支路、直流均压电阻的拓扑结构图；
图4为实施例2的电力电子开关组件拓扑结构图；
图5高电位供能装置拓扑结构图。
图中标记：1、机械隔离开关；2、限流电感；3；额定电流通路支路；4、故障电流切除支路；5、电力电子开关组件；51、晶闸管单元；52；直流均压支路；53、动态均压支路；6、IGBT组件；7、IGBT单元；8、IGBT模块；9、RCD保护吸收支路；10、直流均压电阻；11、PMW脉冲宽度调制整流电路；12、全桥逆变电路；13、LCC串并联谐振电路；14、全桥整流二极管组件；15、谐振电容组件；16、磁环变压器。
具体实施方式
下面结合附图所表示的实施例对本发明作进一步描述：
实施例1
如图1、图2、图3所示，一种中高压双向全固态直流断路器，包括机械隔离开关1、限流电感2、额定电流通路支路3和故障电流切除支路4，额定电流 通路支路3和故障电流切除支路4并联；机械隔离开关1用于隔离电源，断开无负荷电流的电路，无灭弧能力，限流电感2用于抑制瞬态电流，并且对变化率越快的电流，抑制作用越明显。其电感值的大小取决于系统稳定运行的要求。额定电流通路支路3包括串联的电力电子开关组件5和IGBT组件6，电力电子开关组件5由多组晶闸管单元51串联而成，每组晶闸管单元51由正向晶闸管、直流均压支路52、动态均压支路53和反向晶闸管并联而成；晶闸管开关的通态电阻很小，mΩ级、耐压很高约8kV、关断时间短，约为机械开关的一百分之一，故障电流切除时间更短，短路电流峰值更小，灭弧能量大大减小。IGBT组件6包括多组IGBT单元7并联而成；所述故障电流切除支路4包括多组IGBT单元7串联而成；所述IGBT单元7包括全桥IGBT模块双向通流支路和能量吸收支路，所述IGBT模块双向通流支路的桥臂为压接式IGBT模块8，IGBT模块8为绝缘栅双极型晶体管模块，IGBT模块8两端连接有RCD保护吸收支路9和直流均压电阻10。RCD保护吸收支路9包括二极管、电阻、直流电容，其电阻与二极管并联后与直流电容串联。可以减缓IGBT模块8关断时电压的上升速度，减小关断损耗，更快速的将系统中的残留能量泄放掉，直流均压电阻10保证每个IGBT单元7的IGBT模块8两端所承受的压降基本相同，并且可以帮助泄放电能。所述全桥IGBT模块双向通流支路并联能量吸收支路，能量吸收支路包括一个直流电容和一个MOV氧化锌避雷器并联组成。当线路中的残存电能往直流电容充电时，如果直流电容两端电压绝缘配合水平，MOV氧化锌避雷器动作，快速泄放电能，保护IGBT单元7不受损坏。且全桥IGBT模块双向通流支路的设计可以使上下两组IGBT模块8各承担一半负载电流，因此，短路故障分断电流能力增加一倍。
通常情况下，额定电流通路支路3承担全部负载电流，一直处于导通状态。由于电力电子开关组件5和IGBT组件6的通态压降小，对直流断路器的损耗低，不会影响电源系统的总体运行效率。一旦主回路发生短路或故障电流升高，故障电流切除支路4的串联IGBT单元7立即触发导通，随后额定电流通路支路3的并联IGBT单元7进入关断状态，电流开始向故障电流切除支路4转移，电力电子开关组件5的晶闸管电流下降为零后，电力电子开关组件5也进入关断状态，电力电子开关组件5由于晶闸管的特性，具有承受高电压的能力。晶闸管单元51的直流均压支路52、动态均压支路53与晶闸管并联，减缓了晶闸管两端电压 的上升速度，减小器件损耗。故障电流在转移到故障电流切除支路4后，故障电流切除支路4的串联IGBT单元7进入关断状态，由于主回路中的电流很大，限流电感2上存储的能量很多，电弧能量不能立即消失，故障电流切除支路4的串联IGBT单元7的能量吸收支路开始吸收、泄放这些能量。
实施例2
如图1、图2、图3、图4所示，一种中高压双向全固态直流断路器，包括机械隔离开关1、限流电感2、额定电流通路支路3和故障电流切除支路4，额定电流通路支路3和故障电流切除支路4并联；机械隔离开关1用于隔离电源，断开无负荷电流的电路，无灭弧能力，限流电感2用于抑制瞬态电流，并且对变化率越快的电流，抑制作用越明显。其电感值的大小取决于系统稳定运行的要求。额定电流通路支路3包括串联的电力电子开关组件5和IGBT组件6，电力电子开关组件5包括多组串联的晶闸管和连接于额定电流通路支路3上的两对二极管，每组晶闸管都并联有直流均压支路52、动态均压支路53，每对二极管均反向串行连接，所述多组串联的晶闸管的输入端和输出端分别连接于两对二极管的每对二极管之间；两对二极管保证了电流可以双向流动，和实施例1相比，电力电子开关组件5可以减少一半的晶闸管器件，节省了成本。晶闸管开关的通态电阻很小，mΩ级、耐压很高约8kV、关断时间短，约为机械开关的一百分之一，故障电流切除时间更短，短路电流峰值更小，灭弧能量大大减小。IGBT组件6包括多组IGBT单元7并联而成；所述故障电流切除支路4包括多组IGBT单元7串联而成；所述IGBT单元7包括全桥IGBT模块双向通流支路和能量吸收支路，所述IGBT模块双向通流支路的桥臂为压接式IGBT模块8，IGBT模块8为绝缘栅双极型晶体管模块，IGBT模块8两端连接有RCD保护吸收支路9和直流均压电阻10。RCD保护吸收支路9包括二极管、电阻、直流电容，其电阻与二极管并联后与直流电容串联。可以减缓IGBT模块8关断时电压的上升速度，减小关断损耗，更快速的将系统中的残留能量泄放掉，直流均压电阻10保证每个IGBT单元7的IGBT模块8两端所承受的压降基本相同，并且可以帮助泄放电能。所述全桥IGBT模块双向通流支路并联能量吸收支路，能量吸收支路包括一个直流电容和一个MOV氧化锌避雷器并联组成。当线路中的残存电能往直流电容充电时，如果直流电容两端电压绝缘配合水平，MOV氧化锌避雷器动作，快速泄放电能， 保护IGBT单元7不受损坏。且全桥IGBT模块双向通流支路的设计可以使上下两组IGBT模块8各承担一半负载电流，因此，短路故障分断电流能力增加一倍。
通常情况下，额定电流通路支路3承担全部负载电流，一直处于导通状态。由于电力电子开关组件5和IGBT组件6的通态压降小，对直流断路器的损耗低，不会影响电源系统的总体运行效率。一旦主回路发生短路或故障电流升高，故障电流切除支路4的串联IGBT单元7立即触发导通，随后额定电流通路支路3的并联IGBT单元7进入关断状态，电流开始向故障电流切除支路4转移，电力电子开关组件5的晶闸管电流下降为零后，电力电子开关组件5也进入关断状态，电力电子开关组件5由于晶闸管的特性，具有承受高电压的能力。晶闸管单元51的直流均压支路52、动态均压支路53与晶闸管并联，减缓了晶闸管两端电压的上升速度，减小器件损耗。故障电流在转移到故障电流切除支路4后，故障电流切除支路4的串联IGBT单元7进入关断状态，由于主回路中的电流很大，限流电感2上存储的能量很多，电弧能量不能立即消失，故障电流切除支路4的串联IGBT单元7的能量吸收支路开始吸收、泄放这些能量。
通常情况下，额定电流通路支路3承担全部负载电流，一直处于导通状态。由于电力电子开关组件5和IGBT组件6的通态压降小，对直流断路器的损耗低，不会影响电源系统的总体运行效率。一旦主回路发生短路或故障电流升高，故障电流切除支路4的串联IGBT单元7立即触发导通，随后额定电流通路支路3的并联IGBT单元7进入关断状态，电流开始向故障电流切除支路4转移，电力电子开关组件5的晶闸管电流下降为零后，电力电子开关组件5也进入关断状态，电力电子开关组件5由于晶闸管的特性，具有承受高电压的能力。晶闸管单元51的直流均压支路52、动态均压支路53与晶闸管并联，减缓了晶闸管两端电压的上升速度，减小器件损耗。故障电流在转移到故障电流切除支路4后，故障电流切除支路4的串联IGBT单元7进入关断状态，由于主回路中的电流很大，限流电感2上存储的能量很多，电弧能量不能立即消失，故障电流切除支路4的串联IGBT单元7的能量吸收支路开始吸收、泄放这些能量。
实施例3
如图5所示，一种高电位供能装置，包括PMW脉冲宽度调制整流电路11、滤波电容、全桥逆变电路12、谐振电容组件15、磁环变压器16、全桥整流二极 管组件14、高压储能滤波电容、泄放电阻、直流电压变换器；该装置的供电电源为三相交流电，与全固态直流断路器经过的直流电源分开供电，很好的进行了隔离，不会受全固态直流断路器故障电流的影响，保障了固态直流断路器出现故障电流时的控制电源的稳定。所述PMW脉冲宽度调制整流电路11、滤波电容和全桥逆变电路12依次并联；所述PMW脉冲宽度调制整流电路11，包括交流侧的电感和IGBT模块组成的三相半桥电路；所述全桥逆变电路12的桥臂为IGBT模块；所述全桥逆变电路12输出端与谐振电容组件15输入端相连；所述谐振电容组件15的输出端与磁环变压器16的一次回路相连，所述谐振电容组件15和所述磁环变压器16的漏感形成LCC串并联谐振电路13。所述磁环变压器16为纳米晶或锰锌铁氧体磁环变压器，该类磁环变压器16可以抑制低频干扰。每个变压器变压后的电源之间相互独立，给全固态直流断路器的IGBT模块8供电的电源之间不会相互影响。LCC串并联谐振电路13提高了电流的频率和电压，可以使该高电位供能装置的体积大大减小。LCC串并联谐振电路13可以实现IGBT模块零电压开关或零电流开关，减小开关损耗，提高开关频率，而且还可以避免硬开关电路带来的关断过电压和母线电压“虚高”等技术难题。磁环变压器16的二次回路和全桥整流二极管组件14输入端相连，所述全桥整流二极管组件14、高压储能滤波电容、泄放电阻依次并联，泄放电阻在该高电位供能装置切断供电时可以更快速的将电容里的电量泄放掉，更好的保护电路和工作人员安全。泄放电阻的输出端和直流电压变换器相连。直流电压变换器输出端提供全固态直流断路器的IGBT模块8所需的开关驱动电源。其中磁环变压器16、全桥整流二极管组件14、高压储能滤波电容、泄放电阻、直流电压变换器的数量与全固态直流断路器中IGBT模块的数量一致。
文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。

Claims (7)

  1. 一种中高压双向全固态直流断路器，包括机械隔离开关(1)、限流电感(2)、额定电流通路支路(3)和故障电流切除支路(4)，额定电流通路支路(3)和故障电流切除支路(4)并联；其特征在于，所述额定电流通路支路(3)包括串联的电力电子开关组件(5)和IGBT组件(6)，电力电子开关组件(5)由若干组晶闸管单元(51)串联而成，每组晶闸管单元(51)由正向晶闸管、直流均压支路(52)、动态均压支路(53)和反向晶闸管并联而成；IGBT组件(6)包括若干组IGBT单元(7)并联而成；所述故障电流切除支路(4)包括若干组IGBT单元(7)串联而成；所述IGBT单元(7)包括全桥IGBT模块双向通流支路和能量吸收支路，所述全桥IGBT模块双向通流支路并联能量吸收支路，所述IGBT模块双向通流支路的桥臂为IGBT模块(8)，IGBT模块(8)两端连接有RCD保护吸收支路(9)和直流均压电阻(10)。
  2. 根据权利要求1所述的一种中高压双向全固态直流断路器，其特征在于，所述IGBT模块(8)为压接式IGBT模块。
  3. 根据权利要求1或2所述的一种中高压双向全固态直流断路器，其特征在于，所述能量吸收支路包括一个直流电容和一个MOV氧化锌避雷器并联组成。
  4. 根据权利要求1或2所述的一种中高压双向全固态直流断路器，其特征在于，所述RCD保护吸收支路(9)包括二极管、电阻、直流电容，RCD保护吸收支路(9)的电阻与二极管并联后与直流电容串联。
  5. 根据权利要求3所述的一种中高压双向全固态直流断路器，其特征在于，所述RCD保护吸收支路(9)包括二极管、电阻、直流电容，RCD保护吸收支路(9)的电阻与二极管并联后与直流电容串联。
  6. 一种高电位供能装置，其特征在于，包括PMW脉冲宽度调制整流电路(11)、滤波电容、全桥逆变电路(12)、谐振电容组件(15)、磁环变压器(16)、全桥整流二极管组件(14)、高压储能滤波电容、泄放电阻、直流电压变换器；所述PMW脉冲宽度调制整流电路(11)、滤波电容和全桥逆变电路(12)依次并联；所述PMW脉冲宽度调制整流电路(11)，包括交流侧的电感和IGBT模块组成的三相半桥电路；所述全桥逆变电路(12)的桥臂为IGBT模块；所述全桥逆变电路(12)输出端与谐振电容组件(15)输入端相连；所述谐振电容组件(15)的输出端与磁环变压器(16)的一次回路相连，所述谐振电容组件(15)和所述磁 环变压器(16)的漏感形成LCC串并联谐振电路(13)；磁环变压器(16)的二次回路和全桥整流二极管组件(14)输入端相连，所述全桥整流二极管组件(14)、高压储能滤波电容、泄放电阻依次并联，泄放电阻的输出端和直流电压变换器相连。
  7. 根据权利要求6所述的一种高电位供能装置，其特征在于，所述磁环变压器(16)为纳米晶或锰锌铁氧体磁环变压器。
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CN114221309A (zh) * 2021-12-15 2022-03-22 湖北工业大学 一种由电流互感器构成的短路电流双向阻断电路及故障阻断方法
CN114400641A (zh) * 2021-12-22 2022-04-26 智寰(北京)氢能科技有限公司 一种直流电网馈入保护装置及其控制系统
CN115513915A (zh) * 2022-09-29 2022-12-23 国网湖南省电力有限公司 一种二极管桥式双向直流固态断路器
CN116388132B (zh) * 2023-06-05 2023-08-08 广东电网有限责任公司广州供电局 直流限流器、直流断路器、直流故障限流方法及相关设备
CN116388132A (zh) * 2023-06-05 2023-07-04 广东电网有限责任公司广州供电局 直流限流器、直流断路器、直流故障限流方法及相关设备
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