ELECTRICAL GENERATION SYSTEM ANC CONTROL APPARATUS

To provide an electrical generation system capable of both avoiding loss concentration of a plurality of semiconductor switching elements in a neutral point clamped three-phase power converter and suppressing neutral point potential fluctuation, thereby realizing highly safe operation.SOLUTION: An e...

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Bibliographische Detailangaben
Hauptverfasser: KANEDA HIRONARI, ISHIZUKI TERUYUKI, KOYAMA YUJI, MORI JUNJI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide an electrical generation system capable of both avoiding loss concentration of a plurality of semiconductor switching elements in a neutral point clamped three-phase power converter and suppressing neutral point potential fluctuation, thereby realizing highly safe operation.SOLUTION: An electrical generation system according to one embodiment comprises: a neutral point clamped three-phase power converter with a plurality of semiconductor switching elements; and a controller that performs a superposition process to periodically superimpose a positive number of zero-phase voltages and a negative number of zero-phase voltages on a reference voltage command value that controls a plurality of semiconductor switching elements. The period of superimposing positive and negative zero-phase voltages is shorter than the period of the reference voltage command value.SELECTED DRAWING: Figure 1 【課題】中性点クランプ型の三相電力変換器に設けられた複数の半導体スイッチング素子の損失集中の回避と中性点の電位変動の抑制を両立し、安全性の高い運転を実現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、複数の半導体スイッチング素子が配置された中性点クランプ型の三相電力変換器と、複数の半導体スイッチング素子を制御する基準電圧指令値に、正数の零相電圧および負数の零相電圧を周期的に重畳する重畳処理を行う制御装置と、を備える。正数の零相電圧および負数の零相電圧を重畳する周期は、基準電圧指令値の周期よりも短い。【選択図】図1