To achieve both of suppression of a surge voltage of a switching element and reduction of power consumption of a current limiting resistor in current limiting.SOLUTION: A current limiting device includes: a first switching element that is arranged in a path connecting a line breaker connected to a direct current wiring and a filter reactor connected to a power conversion device, and supplies power from the direct current wiring to the filter reactor by on operation; and a plurality of current limiting means that are connected in parallel with the first switching element at the time of on operation of the first switching element, and form a bypass route guiding a current from the direct current wiring to the filter reactor to limit a current in the bypass route. The plurality of current limiting means gradually limit an overcurrent generated in the direct current wiring due to failure or ground fault of the power conversion device.SELECTED DRAWING: Figure 2
【課題】減流時にスイッチング素子のサージ電圧の抑制と減流抵抗の消費電力量の削減を両立すること。【解決手段】直流架線に接続された断流器と電力変換装置に接続されたフィルタリアクトルとを結ぶ経路の中に配置されて、そのオン動作により直流架線からの電力をフィルタリアクトルに供給する第一のスイッチング素子と、第一のスイッチング素子のオン動作時に、第一のスイッチング素子に並列接続され、第一のスイッチング素子のオフ動作時に、直流架線からの電流をフィルタリアクトルに導くバイパス経路を形成し、バイパス経路における電流を減流する複数の減流手段と、を備え、複数の減流手段は、電力変換装置の故障もしくは地絡により直流架線に生じた過電流を段階的に減流する。【選択図】 図2
CURRENT LIMITING DEVICE AND CURRENT LIMITING METHOD
減流装置および減流方法
2019-10-17
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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 , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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