JP7086298B2 - 電力変換装置 - Google Patents
電力変換装置 Download PDFInfo
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- JP7086298B2 JP7086298B2 JP2021530460A JP2021530460A JP7086298B2 JP 7086298 B2 JP7086298 B2 JP 7086298B2 JP 2021530460 A JP2021530460 A JP 2021530460A JP 2021530460 A JP2021530460 A JP 2021530460A JP 7086298 B2 JP7086298 B2 JP 7086298B2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
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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
- H02H7/10—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 for converters; for rectifiers
- H02H7/12—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 for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—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 for converters; for rectifiers for static converters or rectifiers for DC-DC converters
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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
- H02H7/10—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 for converters; for rectifiers
- H02H7/12—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 for converters; for rectifiers for static converters or rectifiers
- H02H7/125—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 for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1257—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 for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to short circuit or wrong polarity in output circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33573—Full-bridge at primary side of an isolation transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/063—Details concerning the co-operation of many similar arrangements, e.g. in a network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/0077—Plural converter units whose outputs are connected in series
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
- H02M3/3372—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration of the parallel type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
- H02M3/3376—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
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- Power Engineering (AREA)
- Inverter Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
- Direct Current Feeding And Distribution (AREA)
- Dc-Dc Converters (AREA)
Description
図1は、実施の形態1に係る電力変換装置が適用されるシステムの一例である風力発電システムの構成図である。この例は、3台の風車が並列に接続された風力発電システムである。なお、風力発電システムとしては、4台以上の風車が並列に接続されていてもよい。この風力発電システムにおいては、風車内の発電機1で発電された交流電力がAC-DC変換装置2で直流電力に変換された後、本実施の形態の電力変換装置3に入力される。この電力変換装置3は、DC-DC変換装置である。なお、AC-DC変換装置2は、交流の入力電力を直流電力に変換して出力する機能を備えている。また、DC-DC変換装置は、直流の入力電力を異なる電圧の直流電力に変換して出力する機能を備えている。
図3は、本実施の形態に係る風力発電システムにおける回り込み電流の説明図である。この例は、図1と同様に3台の風車が並列に接続された風力発電システムである。風車内の発電機1A、1B、1Cに対して、AC-DC変換装置2A、2B、2Cおよび本実施の形態の電力変換装置3A、3B、3Cがそれぞれ直列に接続されている。電力変換装置3A、3B、3Cの出力は、副直流線路6A、6B、6Cにそれぞれ接続されている。副直流線路6A、6B、6Cにはそれぞれ遮断器4A、4B、4Cが備えられている。副直流線路6A、6B、6Cは、主直流線路7に並列に接続されている。主直流線路7は、大容量の電力変換装置5を介して別の電力系統に接続されている。
ΔI=(V/L)×T (1)
L≧{V/(Imax-Ioc)}×T (2)
図5は、実施の形態2に係る電力変換装置が適用されるシステムの一例としての風力発電システムの構成図である。この例は、3台の風車が並列に接続された風力発電システムである。この風力発電システムにおいては、風車内の発電機1で発電された交流電力が本実施の形態の電力変換装置13に入力される。本実施の形態の電力変換装置13はAC-DC変換装置である。この電力変換装置13で交流電力が直流電力に変換される。3台の電力変換装置13は、副直流線路6を経由して主直流線路7に並列に接続されている。図5に示すように、副直流線路6には遮断器4が備えられていてもよい。主直流線路7は、大容量の電力変換装置5を介して別の電力系統に接続されている。
図5に示したように、並列に接続された3台の電力変換装置13において、1台の電力変換装置13が故障して短絡が発生したと仮定する。1台の電力変換装置13で短絡が発生すると、大容量の電力変換装置5および他の2台の電力変換装置13から短絡が発生した電力変換装置13に向かって短絡電流(回り込み電流)が流れる。短絡が発生した電力変換装置13は、電流遮断部32および短絡発生判定部33を備えているので短絡電流を遮断することができる。また、短絡が発生した電力変換装置13には大容量の電力変換装置5から短絡電流が流れ込むので、電力変換装置13に接続された遮断器4が開く。遮断器4が開くことで短絡が発生した電力変換装置13が主直流線路7から電気的に切り離される。ただし、1台の電力変換装置で短絡が発生した直後から遮断器4が開くまでの間には、その1台の電力変換装置に向かって他の2台の電力変換装置から回り込み電流が流れ込む。このとき、他の2台の電力変換装置の短絡発生判定部33は、副直流線路6を流れる回り込み電流を短絡電流と判定して電流遮断部32の半導体スイッチング素子321をオフにする。そのため、短絡が発生していない他の2台の電力変換装置は停止した状態となる。
図7は、実施の形態3に係る電力変換装置23の構成図である。本実施の形態の電力変換装置23は、実施の形態1の図1で示したものと同様に、風力発電システムなどで用いられる電力変換装置である。本実施の形態の電力変換装置23は、実施の形態1の電力変換装置と同様にDC-DC変換装置である。本実施の形態の電力変換装置23は、出力電圧の高電圧化の目的で2台のDC-DC変換部31および電流遮断部32が直列に接続されている。2台の電流遮断部32には第1ゲート駆動部35がそれぞれ接続されている。また、2台のDC-DC変換部31には第2ゲート駆動部36がそれぞれ接続されている。さらに、本実施の形態の電力変換装置23は、副直流線路6の電流値に基づいて出力端子3aで短絡が発生したか否かを判定する短絡発生判定部33と、副直流線路6の電流値および電圧値に基づいて出力端子3aの短絡が解消されたか否かを判定する短絡解消判定部34とを備えている。本実施の形態の電力変換装置23において、DC-DC変換部31、電流遮断部32、短絡発生判定部33、短絡解消判定部34、第1ゲート駆動部35および第2ゲート駆動部36のそれぞれの構成は実施の形態1と同様である。なお、図7に示す電力変換装置においてはDC-DC変換部31および電流遮断部32が2台直列に接続されているが、3台以上直列に接続されていてもよい。
図9は、実施の形態4に係る電力変換装置43の構成図である。本実施の形態の電力変換装置43は、実施の形態1の図1で示したものと同様に、風力発電システムなどで用いられる電力変換装置である。また、本実施の形態の電力変換装置43は、実施の形態3の電力変換装置において、電流遮断部32の還流ダイオード323と並列にバイパススイッチ326を備えたものである。
従って、例示されていない無数の変形例が、本願に開示される技術の範囲内において想定される。例えば、少なくとも1つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも1つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。
Claims (7)
- 入力電力を直流電力に変換する電力変換部と、
前記電力変換部で変換された前記直流電力を出力する出力端子と、
前記出力端子の電流値に基づいて前記出力端子で短絡が発生したか否かを判定する短絡発生判定部と、
前記出力端子の電流値および電圧値に基づいて前記出力端子の短絡が解消されたか否かを判定する短絡解消判定部と、
前記電力変換部と前記出力端子との間に設けられ、前記短絡発生判定部が前記出力端子で短絡が発生したと判定した場合は前記電力変換部から前記出力端子へ流れる電流を遮断し、前記短絡解消判定部が前記出力端子の短絡が解消されたと判定した場合は前記電力変換部から前記出力端子へ流れる電流の遮断を解除する電流遮断部とを備えた電力変換装置であって、
前記短絡解消判定部は、前記出力端子の電流値が予め設定された値よりも小さく、かつ前記出力端子の電圧値が予め設定された値よりも大きい場合に前記出力端子の短絡が解消されたと判定することを特徴とする電力変換装置。 - 入力電力を直流電力に変換する電力変換部と、
前記電力変換部で変換された前記直流電力を出力する出力端子と、
前記出力端子の電流値に基づいて前記出力端子で短絡が発生したか否かを判定する短絡発生判定部と、
前記出力端子の電流値および電圧値に基づいて前記出力端子の短絡が解消されたか否かを判定する短絡解消判定部と、
前記電力変換部と前記出力端子との間に設けられ、前記短絡発生判定部が前記出力端子で短絡が発生したと判定した場合は前記電力変換部から前記出力端子へ流れる電流を遮断し、前記短絡解消判定部が前記出力端子の短絡が解消されたと判定した場合は前記電力変換部から前記出力端子へ流れる電流の遮断を解除する電流遮断部とを備えた電力変換装置であって、
前記電流遮断部は、
半導体スイッチング素子と、
この半導体スイッチング素子に直列に接続された還流ダイオードと、
前記半導体スイッチング素子と前記還流ダイオードとの接続点に接続されたインダクタンス素子とを有しており、
前記半導体スイッチング素子をオフにすることで前記電力変換部から前記出力端子へ流れる電流を遮断することを特徴とする電力変換装置。 - 前記短絡発生判定部は、前記直流電力の電流値が過電流設定値を超えた場合に前記出力端子で短絡が発生したと判定し、
前記過電流設定値は、前記電力変換部の定格電流値よりも大きく、かつ前記半導体スイッチング素子の逆バイアス安全動作領域の最大電流値よりも小さい値に設定されていることを特徴とする請求項2に記載の電力変換装置。 - 前記電力変換部は、三相ブリッジ回路を有し、
前記電力変換装置は、前記電流遮断部の前記半導体スイッチング素子を駆動する第1駆動部と前記電力変換部の前記三相ブリッジ回路を駆動する第2駆動部とをさらに備え、
前記第1駆動部のゲート抵抗値は前記第2駆動部のゲート抵抗値よりも大きいことを特徴とする請求項2または3に記載の電力変換装置。 - 前記電力変換部および前記電流遮断部を複数台有し、複数の前記電力変換部および前記電流遮断部が直列に接続されていることを特徴とする請求項2から4のいずれか1項に記載の電力変換装置。
- 前記電流遮断部は、前記還流ダイオードと並列に接続されたバイパススイッチを備えたことを特徴とする請求項5に記載の電力変換装置。
- 前記半導体スイッチング素子は、ユニポーラ素子であることを特徴とする請求項2から6のいずれか1項に記載の電力変換装置。
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