POWER CONVERSION DEVICE

To provide a power conversion device capable of eliminating steady-state deviation in the output current of a power converter.SOLUTION: A current control unit 8 generates a three-phase AC voltage command value by feedback control for compensating for the deviation of the detection value of a current detector 5 from an AC current command value. The current control unit 8 comprises: means for generating a d-axis current command value by combining a positive-phase d-axis current command value and a negative-phase d-axis current command value, and generating a q-axis current command value by combining a positive-phase q-axis current command value and a negative-phase q-axis current command value; means for performing proportional-integral control calculation for the deviation of the detection value of the current detector 5 from the d-axis current command value and the q-axis current command value; means for converting the deviation of the detection value of the current detector 5 into a reverse phase coordinate system; means for performing an integral control operation on the deviation of the detection value of the current detector converted into the reverse phase coordinate system; and means for generating a three-phase AC voltage command value using the value calculated by the proportional-integral control operation and the value calculated by the integral control operation.SELECTED DRAWING: Figure 1 【課題】電力変換器の出力電流における定常偏差をなくすことができる電力変換装置を提供する。【解決手段】電流制御部８は、交流電流指令値に対する電流検出器５の検出値の偏差を補償するためのフィードバック制御によって、三相交流電圧指令値を生成する。電流制御部８は、正相ｄ軸電流指令値と逆相ｄ軸電流指令値とを合成してｄ軸電流指令値を生成するとともに、正相ｑ軸電流指令値と逆相ｑ軸電流指令値とを合成してｑ軸電流指令値を生成する手段と、ｄ軸電流指令値およびｑ軸電流指令値に対する電流検出器５の検出値の偏差に対して比例積分制御演算を行う手段と、電流検出器５の検出値の偏差を逆相座標系に変換する手段と、逆相座標系に変換された電流検出器の検出値の偏差に対して積分制御演算を行う手段と、比例積分制御演算による演算値と、積分制御演算による演算値とを用いて三相交流電圧指令値を生成する手段とを含む。【選択図】図１