In the prior art, there has been the problem, in the case of conducting, for a fixed time, rated operation of a power conversion device (hereinafter referred to as a Multi Modular Converter, an "MMC") constituted by connecting, in bridge mode, arms compose...

A power conversion apparatus is disclosed in which AC sides of plural single-phase inverters (IB-INV, 2B-INV, 3B-INV, 2Ba-INV) that convert DC power of DC power sources (V 1B , V 2B , V 3B , V 2Ba ) to AC power are connected in series, and in which gradati...