JP3618273B2 - DC feeder system for electric railway - Google Patents

DC feeder system for electric railway Download PDF

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Publication number
JP3618273B2
JP3618273B2 JP2000073281A JP2000073281A JP3618273B2 JP 3618273 B2 JP3618273 B2 JP 3618273B2 JP 2000073281 A JP2000073281 A JP 2000073281A JP 2000073281 A JP2000073281 A JP 2000073281A JP 3618273 B2 JP3618273 B2 JP 3618273B2
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Japan
Prior art keywords
storage device
voltage
feeder
power
power storage
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JP2001260719A (en
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芳文 持永
好信 中道
伸一 長谷
正 上村
秀夫 渡辺
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Meidensha Corp
Railway Technical Research Institute
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Meidensha Corp
Railway Technical Research Institute
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/02—Electric propulsion with power supply external to the vehicle using dc motors
    • B60L9/08—Electric propulsion with power supply external to the vehicle using dc motors fed from ac supply lines
    • B60L9/12—Electric propulsion with power supply external to the vehicle using dc motors fed from ac supply lines with static converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/04—Cutting off the power supply under fault conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/65—Monitoring or controlling charging stations involving identification of vehicles or their battery types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/36—Temperature of vehicle components or parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/52—Drive Train control parameters related to converters
    • B60L2240/525—Temperature of converter or components thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/80—Time limits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/126—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Direct Current Feeding And Distribution (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、電鉄用直流き電システムに係り、特に電気車からの回生電力を蓄積するエネルギー蓄積装置を設けたシステムに関する。
【０００２】
【従来の技術】
電鉄用直流き電システムは、図２に概略構成を示すように、変電所１で交流電源から整流器２（順変換器）を通して得る直流電力を、き電線３およびトロリー線４を通して負荷となる直流電気車５に給電できるようにする。
【０００３】
最近の直流電気車は、その減速時のエネルギーをき電線側に回生することで省エネを図る電力回生方式が多く採用されている。この回生電力は、き電線やトロリー線から他の電気車への供給電力として消費するか、変電所の回生変電設備から交流電力として回生することができる。
【０００４】
回生電力を変電所の交流電源側へ回生する場合、変電所から交流電源への逆潮流の問題や回生変電設備のコストの問題がある。この問題を解消する方式として、直流側に設ける抵抗器で熱として消費するものもある。
【０００５】
上記の回生電力を抵抗器で消費する方式では電気車が回生機能をもつにもかかわらず、電力回生効率を高めることができなくなる。この課題を解消する方式として、回生電力を直流側に設けた直流電力貯蔵装置に貯蔵しておき、この貯蔵電力を電気車の力行に際しての給電電力の一部として放電する方式がある（例えば、特開平１１−９１４１５号公報）。
【０００６】
この方式は、図３に示す構成にされる。整流器６からき電線に直流電力を供給するにおいて、整流器６の直流側に電流制御回路（昇降圧チョッパ）７と直流電力貯蔵装置（二次電池、キャパシタ、電気二重層キャパシタ）８からなるエネルギー蓄積装置を設備し、電気車が回生状態にある場合は電流制御回路７を通して直流電力貯蔵装置８を充電し、電気車が力行状態にある場合は直流電力貯蔵装置８から電流制御回路７を通して放電させる。
【０００７】
【発明が解決しようとする課題】
従来の電力貯蔵装置は、回生電力の有無によって単に直流電力貯蔵装置を充電／放電させる制御方式になるため、その利用効率および設備効率が悪くなる問題がある。
【０００８】
例えば、直流電力貯蔵装置としての電池は、き電系統電圧が充電制御設定電圧１６００Ｖ以上で充電を行い、放電制御設定電圧１４００Ｖ以下で放電を行う構成とし、き電系統の最低電圧が１２００Ｖ、最大電圧が１８００Ｖとすると、き電系統電圧が１８００〜１６００Ｖでは充電を行い、１４００〜１２００Ｖでは放電を行う。
【０００９】
この場合、電池は、その０〜１２００Ｖに相当する電圧分は充放電に寄与することなく、単にバイアス電圧として維持するためのものになる。仮に、電池の定格電圧を１６００Ｖとすると、その電圧利用率は、
【００１０】
【数１】
（１６００−１２００）／１６００＝０．２５
となり、装置の定格電圧からみて２５％の電圧分しか充放電に寄与せず、残りの電圧分は単に定格電圧を確保するためであり、この電圧確保のために多数の電池を多段直並列接続で設ける構成になる。
【００１１】
一方、電鉄用き電システムでは、電気車からの回生電力も大きく、電力貯蔵装置での充放電電流定格も非常に大きくなる。
【００１２】
これら事情から、電流制御回路および直流電力貯蔵装置が大型で高価な設備になり、しかもその利用率が低いことから、設備効率を低下させてしまう。
【００１３】
本発明の目的は、エネルギー蓄積装置の利用効率および設備効率を高めた電鉄用直流き電システムを提供することにある。
【００１４】
【課題を解決するための手段】
本発明のエネルギー蓄積装置は、直流電力貯蔵装置の電圧のうち、き電線との充放電に寄与しない電圧を基にして定める電圧分だけ低くし、これに伴って昇降圧チョッパの昇降圧比を高くすることにより、装置の利用効率及び設備効率を高め、さらには昇降圧チョッパとき電線との間に、直流電力貯蔵装置から昇降圧チョッパを通してき電線側への自然放電を阻止するストッパースイッチを設け、かつ直流電力貯蔵装置の充放電制御にはき電線電圧および充放電電流を基にした制御を行うことにより、エネルギー蓄積装置の保護等も可能にするもので、以下の構成を特徴とする。
【００１５】
交流電源から整流器または順変換器を介してき電線に直流電力を供給し、該整流器または順変換器の直流側に設けたエネルギー蓄積装置により、電気車からの回生電力を直流電力貯蔵装置の充電電力として回生する電鉄用直流き電システムにおいて、
前記エネルギー蓄積装置は、き電線電圧が充電制御設定電圧以上にあるときにき電線から前記直流電力貯蔵装置への充電電流を制御し、き電線電圧が放電制御設定電圧以下にあるときに前記直流電力貯蔵装置からき電線への放電電流を制御する昇降圧チョッパを備え、
前記エネルギー蓄積装置は、前記直流電力貯蔵装置の電圧のうち、き電線との充放電に寄与しない電圧を基にして定める電圧分だけ低くした構成とし、
前記昇降圧チョッパは、前記直流電力貯蔵装置の電圧からき電線への所期の充放電電圧を得る高い昇降圧比にした構成とし、
前記昇降圧チョッパとき電線との間に、前記直流電力貯蔵装置から昇降圧チョッパを通してき電線側への自然放電を阻止するストッパースイッチを設けたことを特徴とする。
【００１７】
また、前記エネルギー蓄積装置は、前記昇降圧チョッパからき電線側に流れる高調波を抑止するフィルタを設けたことを特徴とする。
【００１８】
また、前記エネルギー蓄積装置は、前記昇降圧チョッパの充放電電流を制御する電流制御手段を備えたことを特徴とする。
【００１９】
【発明の実施の形態】
図１は、本発明の実施形態を示すエネルギー蓄積装置の主回路構成図であり、変電所では従来システムと同様に、交流電源から整流器（または順変換器）１０によって定格電圧になる直流電力に変換してき電線側に供給する。
【００２０】
電力貯蔵装置１１は、二次電池、キャパシタまたは電気二重層キャパシタにされ、その充放電装置として昇降圧チョッパ１２が接続される。
【００２１】
昇降圧チョッパ１２の主回路構成は、ＩＧＢＴで示す半導体スイッチＳＷ１，ＳＷ２を直列接続し、これらスイッチＳＷ１，ＳＷ２にそれぞれ逆並列にフライホイールダイオードＤ１，Ｄ２を設けて上下アームを構成し、上下アームの接続点から直流リアクトルＬを介して電池１１との間を接続する。
【００２２】
昇降圧チョッパ１２による直流電力貯蔵装置１１の降圧充電は、スイッチＳＷ１，ＳＷ２の両端に印加される直流電圧に対して、スイッチＳＷ１をチョッパ動作させ、そのオン期間にはスイッチＳＷ１からリアクトルＬを通して直流電力貯蔵装置１１に充電電流を供給し、そのオフ期間にはリアクトルＬの電流エネルギーを直流電力貯蔵装置１１→ダイオードＤ２の経路で直流電力貯蔵装置１１に充電電流を供給する。
【００２３】
昇降圧チョッパ１２を通した直流電力貯蔵装置１１からの昇圧放電は、スイッチＳＷ２をチョッパ動作させ、そのオン期間には直流電力貯蔵装置１１からリアクトルＬに短絡電流を流すことでリアクトルＬに電流エネルギーを蓄積し、そのオフ期間にリアクトルＬからダイオードＤ１を通してき電線側に放電する。
【００２４】
昇降圧チョッパ１２の高圧側には、ストッパスイッチ１３を設ける。このストッパスイッチ１３は、き電線側からチョッパ１２への流入電流にはダイオードＤ３で常に導通可能にし、チョッパ１２からき電線側への電流にはＧＴＯで示す半導体スイッチＳＷ３でオン・オフ制御可能にする。
【００２５】
このストッパスイッチ１３は、き電線側の電圧が直流電力貯蔵装置１１の電圧よりも低くなった場合にき電線側に自然放電されるのを防止し、チョッパ１３のチョッパ動作によって直流電力貯蔵装置１１からき電線側に昇圧放電する場合のみその電流路を形成するためのものである。
【００２６】
ストッパスイッチ１３とき電線側の間には、並列接続のコンデンサ１４と直列接続のリアクトル１５を設ける。これらコンデンサ１４とリアクトル１５は、直流電力貯蔵装置１１から昇降圧チョッパ１２を通した充放電電流に含まれる高調波（チョッパ動作による高調波）を抑制するためのものである。この高調波抑制は、沿線の通信障害や鉄道信号機器への障害および車内ラジオ等への障害を防止する。
【００２７】
リアクトル１５とき電線との間には直流高速しゃ断器１６を設け、さらにはしゃ断器１７を設け、レール側には断路器１８を設ける。しゃ断器１６は、き電線系統の事故発生時に系統からエネルギー蓄積装置を高速に解列し、しゃ断器１７と断路器１８はシステムの運転停止時などに系統からエネルギー蓄積装置を解列するためのものである。
【００２８】
電圧検出器１９はき電線電圧を検出し、電流検出器としての変流器２０は直流電力貯蔵装置１１の充放電電流を検出するためのものである。これら検出器による検出電圧および電流は、図示省略するエネルギー蓄積制御装置に検出信号として取り込み、該制御装置は昇降圧チョッパ１２のチョッパ制御と、ストッパスイッチ１３のオン・オフ制御を行う。
【００２９】
以上のように構成したエネルギー蓄積装置において、その利用効率および設備効率を高めるため、チョッパ１２の昇降圧比を高くし、直流電力貯蔵装置１１は定格電圧を低くする。
【００３０】
この構成において、例えば、前記と同様に、エネルギー蓄積装置を、き電系統電圧が１６００Ｖ以上で充電動作させ、１４００Ｖ以下で放電動作させる場合、昇降圧チョッパ１２の最大昇圧比を２．５とすると、直流電力貯蔵装置１１は５６０〜１４００Ｖの電圧範囲にあれば、チョッパ１２により１４００Ｖまで昇圧してき電系統へ放電することができる。
【００３１】
この場合、直流電力貯蔵装置１１の電圧のうち、充放電に利用されない電圧（バイアス）分は０〜５６０Ｖになり、その利用率は、
【００３２】
【数２】
（１４００−５６０）／１４００＝０．６
となり、直流電力貯蔵装置電圧の６０％が充放電電圧に寄与することになり、利用効率を高めることができる。また、必要とする直流電力貯蔵装置電圧が低くなるため、そのコストダウンおよび小型化を図ることができ、設備効率を高めることができる。
【００３３】
次に、エネルギー蓄積装置の充放電制御は、き電系統電圧が直流電力貯蔵装置を充電する電圧範囲または直流電力貯蔵装置から放電する電圧範囲にあるか否かで切り替え、この切り替えは電圧検出器１９の検出信号から判定することができる。このような充放電制御は、直流電力貯蔵装置１１に二次電池を使用する場合はその電圧がほぼ一定のため、なんら問題はない。
【００３４】
しかし、直流電力貯蔵装置１１としてキャパシタや電気二重層キャパシタを使用する場合、そのときの電圧によって充放電電流が大きく変化する。この大きな電流変化は、チョッパ１２やストッパスイッチ１３等に使用する半導体スイッチやダイオードに電流破壊や過熱を起こす恐れがあるし、電流性能が高い高価な素子を必要とする。また、高速遮断器１６等が誤動作する恐れがある。
【００３５】
例えば、直流電力貯蔵装置電圧が１０００Ｖ、き電線電圧が１４００Ｖで直流電力貯蔵装置から放電し、このときのき電系統の負荷電流が２０００Ａとなる場合、エネルギー蓄積装置からの放電電流は、
【００３６】
【数３】
２０００×（１４００／１０００）＝２８００Ａ
となる。この電流増加は、直流電力貯蔵装置１１の電圧を低くするほど大きくなる。
【００３７】
そこで、本実施形態では、エネルギー蓄積装置の最大充放電電流を設定しておき、直流電力貯蔵装置１１の充放電電流を電流検出器２０によって検出し、この検出電流が最大充放電電流以下になるようチョッパ１２の導通期間を制限する。
【００３８】
次に、直流電力貯蔵装置１１として二次電池とする場合、その充電は、低電流化したほうが電池寿命等の点で優れる。そこで、本実施形態では、き電線電圧を基にした直流電力貯蔵装置の充電制御に加えて、電流検出器１２による検出電流を基にして充電電流を制限する。
【００３９】
これら電流制御機能を設けることは、閑散線区のき電システムでのピークカット対策としても有効となる。すなわち、閑散線区では、電気車がたまにしか運転されないことから、閑散時間帯に電池を低電流充電しておき、電気車が運転される時間帯に大電流放電することにより、変電所の交流電源からみて負荷の平準化が可能となる。
【００４０】
【発明の効果】
以上のとおり、本発明によれば、エネルギー蓄積装置の直流電力貯蔵装置の電圧を低くし、昇降圧チョッパの昇降圧比を高くするようにしたため、き電線への充放電に寄与しない電圧分を低くすることができ、エネルギー蓄積装置の利用効率及び設備効率を高めることができる。
【００４１】
また、直流電力貯蔵装置の充放電制御にはき電線電圧および充放電電流を基にした制御を行うことにより、装置の保護等も可能になる。
【図面の簡単な説明】
【図１】本発明の実施形態を示す主回路構成図。
【図２】電鉄用直流き電システムの概略構成図。
【図３】エネルギー蓄積装置の概略構成図。
【符号の説明】
１０…整流器
１１…直流電力貯蔵装置
１２…昇降圧チョッパ
１３…ストッパースイッチ
１４…フィルタコンデンサ
１５…リアクトル
１６…高速しゃ断器
１９…電圧検出器
２０…変流器[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a DC feeding system for electric railways, and more particularly to a system provided with an energy storage device that stores regenerative power from an electric vehicle.
[0002]
[Prior art]
As shown schematically in FIG. 2, the DC power feeding system for electric railways is a direct current that becomes a load through the feeder 3 and the trolley wire 4, and receives DC power obtained from the AC power source through the rectifier 2 (forward converter) at the substation 1. The electric vehicle 5 can be fed.
[0003]
In recent DC electric vehicles, a power regeneration system that saves energy by regenerating energy at the time of deceleration to the feeder side is often employed. This regenerative power can be consumed as power supplied to other electric vehicles from feeders or trolley lines, or can be regenerated as AC power from regenerative substation equipment at a substation.
[0004]
When regenerative power is regenerated to the AC power supply side of the substation, there is a problem of reverse power flow from the substation to the AC power supply and the cost of the regenerative substation equipment. As a method for solving this problem, there is a method that consumes heat as a resistor provided on the DC side.
[0005]
In the method of consuming the regenerative power with a resistor, the power regeneration efficiency cannot be increased even though the electric vehicle has a regenerative function. As a method for solving this problem, there is a method in which regenerative power is stored in a DC power storage device provided on the DC side, and this stored power is discharged as a part of power supply power when the electric vehicle is powered (for example, JP-A-11-91415).
[0006]
This method is configured as shown in FIG. In supplying DC power from the rectifier 6 to the feeder, an energy storage device comprising a current control circuit (buck-boost chopper) 7 and a DC power storage device (secondary battery, capacitor, electric double layer capacitor) 8 on the DC side of the rectifier 6. The DC power storage device 8 is charged through the current control circuit 7 when the electric vehicle is in the regenerative state, and discharged from the DC power storage device 8 through the current control circuit 7 when the electric vehicle is in the power running state.
[0007]
[Problems to be solved by the invention]
Since the conventional power storage device is a control system that simply charges / discharges the DC power storage device depending on the presence or absence of regenerative power, there is a problem that its utilization efficiency and facility efficiency deteriorate.
[0008]
For example, a battery as a DC power storage device is configured such that charging is performed at a feeding system voltage of 1600 V or more and discharging is performed at a discharging control setting voltage of 1400 V or less, and the minimum voltage of the feeding system is 1200 V and the maximum. When the voltage is 1800 V, charging is performed when the feeding system voltage is 1800 to 1600 V, and discharging is performed when the voltage is 1400 to 1200 V.
[0009]
In this case, the battery is merely for maintaining a voltage corresponding to 0 to 1200 V as a bias voltage without contributing to charging and discharging. If the rated voltage of the battery is 1600V, the voltage utilization rate is
[0010]
[Expression 1]
(1600-1200) /1600=0.25
Therefore, only 25% of the rated voltage of the device contributes to charging / discharging, and the remaining voltage is simply to secure the rated voltage. To secure this voltage, multiple batteries are connected in multiple stages in series and parallel. It becomes the structure provided in.
[0011]
On the other hand, in the electric power feeding system for electric railways, the regenerative power from the electric vehicle is large, and the charge / discharge current rating in the power storage device is very large.
[0012]
Under these circumstances, the current control circuit and the direct-current power storage device become large and expensive facilities, and the utilization rate is low, so the facility efficiency is lowered.
[0013]
An object of the present invention is to provide a DC feeding system for electric railways in which the utilization efficiency and facility efficiency of an energy storage device are improved.
[0014]
[Means for Solving the Problems]
The energy storage device of the present invention lowers the voltage of the DC power storage device by a voltage determined based on the voltage that does not contribute to charging / discharging with the feeder, and accordingly increases the step-up / step-down ratio of the step-up / step-down chopper. By improving the use efficiency and equipment efficiency of the device, and further providing a stopper switch that prevents natural discharge from the DC power storage device through the buck-boost chopper to the wire side between the buck-boost chopper and the electric wire, In addition, the charging / discharging control of the DC power storage device enables control of the energy storage device by performing control based on the feeder voltage and charging / discharging current, and has the following configuration.
[0015]
DC power is supplied from the AC power source to the feeder via the rectifier or forward converter, and the regenerative power from the electric vehicle is charged to the DC power storage device by the energy storage device provided on the DC side of the rectifier or forward converter. As a DC feeder system for electric railways
The energy storage device controls a charging current from the feeder to the DC power storage device when the feeder voltage is equal to or higher than a charge control set voltage, and the DC when the feeder voltage is equal to or lower than a discharge control set voltage. With a buck-boost chopper that controls the discharge current from the power storage device to the feeder,
The energy storage device has a configuration in which the voltage of the DC power storage device is reduced by a voltage determined based on a voltage that does not contribute to charging / discharging with the feeder,
The step-up / step-down chopper is configured to have a high step-up / step-down ratio to obtain a desired charge / discharge voltage from the voltage of the DC power storage device to the feeder line ,
A stopper switch is provided between the step-up / step-down chopper and the electric wire to prevent natural discharge from the DC power storage device through the step-up / step-down chopper to the electric wire side .
[0017]
In addition, the energy storage device is provided with a filter that suppresses harmonics flowing from the step-up / down chopper to the feeder line side.
[0018]
In addition, the energy storage device includes a current control unit that controls a charge / discharge current of the step-up / down chopper.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a main circuit configuration diagram of an energy storage device according to an embodiment of the present invention. In a substation, from an AC power source to a DC power that becomes a rated voltage by a rectifier (or forward converter) 10 as in the conventional system. Convert and supply to the electric wire side.
[0020]
The power storage device 11 is a secondary battery, a capacitor or an electric double layer capacitor, and a step-up / step-down chopper 12 is connected as a charge / discharge device.
[0021]
The main circuit configuration of the step-up / down chopper 12 is that semiconductor switches SW1 and SW2 indicated by IGBTs are connected in series, and flywheel diodes D1 and D2 are provided in reverse parallel to these switches SW1 and SW2, respectively, to constitute upper and lower arms. The battery 11 is connected through the direct current reactor L from the connection point.
[0022]
In step-down charging of the DC power storage device 11 by the step-up / step-down chopper 12, the switch SW1 is chopper-operated with respect to the DC voltage applied to both ends of the switches SW1 and SW2, and DC is passed from the switch SW1 through the reactor L during the ON period. A charging current is supplied to the power storage device 11, and the current energy of the reactor L is supplied to the DC power storage device 11 through the path of the DC power storage device 11 → the diode D2 during the off period.
[0023]
The step-up discharge from the DC power storage device 11 through the step-up / step-down chopper 12 causes the switch SW2 to perform a chopper operation, and during the ON period, a short-circuit current is passed from the DC power storage device 11 to the reactor L, whereby current energy is supplied to the reactor L. And is discharged from the reactor L through the diode D1 to the electric wire side during the OFF period.
[0024]
A stopper switch 13 is provided on the high pressure side of the step-up / down chopper 12. This stopper switch 13 always allows conduction of current flowing from the feeder side to the chopper 12 by the diode D3, and allows current flowing from the chopper 12 to the feeder side by the semiconductor switch SW3 indicated by GTO. .
[0025]
The stopper switch 13 prevents spontaneous discharge to the feeder side when the voltage on the feeder side becomes lower than the voltage of the DC power storage device 11, and the DC power storage device 11 is operated by the chopper operation of the chopper 13. This is for forming the current path only when boost discharge is performed on the side of the feeder wire.
[0026]
Between the stopper switch 13 and the wire side, a parallel-connected capacitor 14 and a series-connected reactor 15 are provided. The capacitor 14 and the reactor 15 are for suppressing harmonics (harmonics due to chopper operation) included in the charge / discharge current that has passed through the step-up / step-down chopper 12 from the DC power storage device 11. This harmonic suppression prevents communication troubles along railway lines, railway signal equipment, and in-car radio.
[0027]
A DC high-speed circuit breaker 16 is provided between the reactor 15 and the electric wire, a circuit breaker 17 is further provided, and a disconnector 18 is provided on the rail side. The circuit breaker 16 disconnects the energy storage device from the system at a high speed when an accident occurs in the feeder system, and the circuit breaker 17 and the disconnecting device 18 are used to disconnect the energy storage device from the system when the system is stopped. Is.
[0028]
The voltage detector 19 detects the feeder voltage, and the current transformer 20 as a current detector is for detecting the charge / discharge current of the DC power storage device 11. The detection voltage and current detected by these detectors are captured as detection signals in an energy storage control device (not shown), and the control device performs chopper control of the step-up / step-down chopper 12 and on / off control of the stopper switch 13.
[0029]
In the energy storage device configured as described above, in order to increase the utilization efficiency and facility efficiency, the step-up / step-down ratio of the chopper 12 is increased, and the DC power storage device 11 is decreased in rated voltage.
[0030]
In this configuration, for example, in the same manner as described above, when the energy storage device is charged at a feeding system voltage of 1600 V or more and discharged at 1400 V or less, the maximum boosting ratio of the step-up / down chopper 12 is set to 2.5. If the DC power storage device 11 is in the voltage range of 560 to 1400 V, it can be boosted to 1400 V by the chopper 12 and discharged to the power system.
[0031]
In this case, of the voltage of the DC power storage device 11, the voltage (bias) that is not used for charging / discharging is 0 to 560 V, and the usage rate is
[0032]
[Expression 2]
(1400-560) /1400=0.6
Thus, 60% of the DC power storage device voltage contributes to the charge / discharge voltage, and the utilization efficiency can be improved. Further, since the required DC power storage device voltage is lowered, the cost can be reduced and the size can be reduced, and the equipment efficiency can be increased.
[0033]
Next, the charge / discharge control of the energy storage device is switched depending on whether or not the feeding system voltage is within the voltage range for charging the DC power storage device or the voltage range for discharging from the DC power storage device. It can be determined from 19 detection signals. Such charge / discharge control has no problem when the secondary battery is used for the DC power storage device 11 because the voltage is substantially constant.
[0034]
However, when a capacitor or an electric double layer capacitor is used as the DC power storage device 11, the charging / discharging current varies greatly depending on the voltage at that time. This large current change may cause current destruction or overheating in semiconductor switches and diodes used for the chopper 12, the stopper switch 13, and the like, and requires an expensive element with high current performance. In addition, the high-speed circuit breaker 16 or the like may malfunction.
[0035]
For example, when the DC power storage device voltage is 1000 V and the feeder voltage is 1400 V, the DC power storage device is discharged, and when the load current of the feeder system is 2000 A, the discharge current from the energy storage device is
[0036]
[Equation 3]
2000 × (1400/1000) = 2800A
It becomes. This increase in current increases as the voltage of the DC power storage device 11 is lowered.
[0037]
Therefore, in the present embodiment, the maximum charging / discharging current of the energy storage device is set, the charging / discharging current of the DC power storage device 11 is detected by the current detector 20, and the detected current becomes equal to or less than the maximum charging / discharging current. The conduction period of the chopper 12 is limited.
[0038]
Next, when a secondary battery is used as the DC power storage device 11, the charging is more excellent in terms of battery life and the like when the current is reduced. Therefore, in this embodiment, in addition to the charging control of the DC power storage device based on the feeder voltage, the charging current is limited based on the current detected by the current detector 12.
[0039]
Providing these current control functions is also effective as a peak cut countermeasure in a feeder system in a quiet line area. In other words, since the electric car is operated only occasionally in the quiet line area, the battery is charged with a low current during the quiet time period, and the high current is discharged during the time when the electric car is operated, so that the AC of the substation The load can be leveled from the viewpoint of the power source.
[0040]
【The invention's effect】
As described above, according to the present invention, since the voltage of the DC power storage device of the energy storage device is lowered and the step-up / step-down ratio of the step-up / step-down chopper is increased, the voltage component that does not contribute to charging / discharging of the feeder is reduced. It is possible to improve the utilization efficiency and facility efficiency of the energy storage device.
[0041]
Further, by performing control based on the feeder voltage and charge / discharge current in the charge / discharge control of the DC power storage device, the device can be protected.
[Brief description of the drawings]
FIG. 1 is a main circuit configuration diagram showing an embodiment of the present invention.
FIG. 2 is a schematic configuration diagram of a DC feeding system for electric railways.
FIG. 3 is a schematic configuration diagram of an energy storage device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Rectifier 11 ... DC power storage device 12 ... Buck-boost chopper 13 ... Stopper switch 14 ... Filter capacitor 15 ... Reactor 16 ... High-speed circuit breaker 19 ... Voltage detector 20 ... Current transformer

Claims (3)

交流電源から整流器または順変換器を介してき電線に直流電力を供給し、該整流器または順変換器の直流側に設けたエネルギー蓄積装置により、電気車からの回生電力を直流電力貯蔵装置の充電電力として回生する電鉄用直流き電システムにおいて、
前記エネルギー蓄積装置は、き電線電圧が充電制御設定電圧以上にあるときにき電線から前記直流電力貯蔵装置への充電電流を制御し、き電線電圧が放電制御設定電圧以下にあるときに前記直流電力貯蔵装置からき電線への放電電流を制御する昇降圧チョッパを備え、
前記エネルギー蓄積装置は、前記直流電力貯蔵装置の電圧のうち、き電線との充放電に寄与しない電圧を基にして定める電圧分だけ低くした構成とし、
前記昇降圧チョッパは、前記直流電力貯蔵装置の電圧からき電線への所期の充放電電圧を得る高い昇降圧比にした構成とし、
前記昇降圧チョッパとき電線との間に、前記直流電力貯蔵装置から昇降圧チョッパを通してき電線側への自然放電を阻止するストッパースイッチを設けたことを特徴とする電鉄用直流き電システム。DC power is supplied from the AC power source to the feeder via the rectifier or forward converter, and the regenerative power from the electric vehicle is charged to the DC power storage device by the energy storage device provided on the DC side of the rectifier or forward converter. As a DC feeder system for electric railways
The energy storage device controls a charging current from the feeder to the DC power storage device when the feeder voltage is equal to or higher than a charge control set voltage, and the DC when the feeder voltage is equal to or lower than a discharge control set voltage. With a buck-boost chopper that controls the discharge current from the power storage device to the feeder,
The energy storage device has a configuration in which the voltage of the DC power storage device is reduced by a voltage determined based on a voltage that does not contribute to charging / discharging with the feeder,
The step-up / step-down chopper is configured to have a high step-up / step-down ratio to obtain a desired charge / discharge voltage from the voltage of the DC power storage device to the feeder line ,
A DC power feeding system for railways, wherein a stopper switch is provided between the step-up / step-down chopper and the electric wire to prevent a natural discharge from the DC power storage device through the step-up / step-down chopper to the electric wire side . 前記エネルギー蓄積装置は、前記昇降圧チョッパからき電線側に流れる高調波を抑止するフィルタを設けたことを特徴とする請求項１に記載の電鉄用直流き電システム。 2. The DC feeding system for railways according to claim 1, wherein the energy storage device is provided with a filter that suppresses harmonics flowing from the step-up / down chopper to the feeder line side . 前記エネルギー蓄積装置は、前記昇降圧チョッパの充放電電流を制御する電流制御手段を備えたことを特徴とする請求項１または２に記載の電鉄用直流き電システム。 The DC power feeding system for railways according to claim 1 or 2, wherein the energy storage device includes current control means for controlling a charge / discharge current of the step-up / down chopper .
JP2000073281A 2000-03-16 2000-03-16 DC feeder system for electric railway Expired - Lifetime JP3618273B2 (en)

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