Oblon, McClelland, Maier & Neustadt, L.L.P.
Power conversion apparatus for interconnection with a three-phrase ac power supply
A control device generates a voltage command value for controlling a current flowing between a three-phase AC power supply and a power converter such that a full voltage representative value representing voltage values of all power storage devices agrees with a DC voltage command value. The control device generates a zero-phase voltage command value for controlling a circulating current flowing in a delta connection such that the voltage values of the power storage devices are balanced among first to third arms. The control device combines the voltage command value and the zero-phase current command value to generate an output voltage command value for controlling an output voltage of each unit converter. The control device removes a control amount of the full voltage representative value from a computation of the zero-phase voltage command value to cause output current control and circulating current control not to interfere with each other.
Mitsubishi Electric Corporation TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
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Hisanori Toshiyuki Ryosuke Kaho Taichiro Ryota
Taguchi Fujii Uda Mukunoki Tsuchiya Okuyama