POWER GENERATING SYSTEM AND CONTROL UNIT

To provide a power generating system that can be operated in a wider operation region by preventing a variation in neutral point potential.SOLUTION: A power generating system comprises: a neutral-point clamped power converter having a converter that converts AC power supplied from an electric power...

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Bibliographische Detailangaben
Hauptverfasser:	KANEDA HIRONARI, ISHIZUKI TERUYUKI, KOYAMA YUJI, MORI JUNJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROL OR REGULATION THEREOF CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	To provide a power generating system that can be operated in a wider operation region by preventing a variation in neutral point potential.SOLUTION: A power generating system comprises: a neutral-point clamped power converter having a converter that converts AC power supplied from an electric power system into DC power, and an inverter that converts the DC power supplied from the converter into AC power; an induction generator that is connected to the inverter; and a control unit that, according to at least slip of the induction generator, switches a control mode of the power converter between a first control mode and a second control mode different from the first control mode in at least one of a modulation system of the power converter and an output method of reactive power to the electric power system.SELECTED DRAWING: Figure 1 【課題】中性点電位の変動を抑制してより広い運転領域で運転することが可能な発電システムを提供する。【解決手段】一実施形態に係る発電システムは、電力系統から供給された交流電力を直流電力に変換するコンバータと、コンバータから供給された直流電力を交流電力に変換するインバータと、を有する中性点クランプ型の電力変換器と、インバータに接続される誘導発電機と、少なくとも誘導発電機のすべりに応じて、電力変換器の制御モードを、第１制御モードと、電力変換器の変調方式と電力系統への無効電力の出力方法との少なくとも一方が第１制御モードと異なる第２制御モードとの間で切り替える制御装置と、を備える。【選択図】図１