正相電圧によるdq 変換を用いた三相コンバータの 系統事故時の実験的検証

抄録

3-phase converters are often used to connect large-capacity photovoltaic power generation and/or electric　vehicles to　the grid. Normally, dq transformation is used for current control of 3-phase converter. The dq　transformation requires the phase of　the grid voltage, and phase locked loop (PLL) is commonly used. However, the increased computational load of the PLL may cause　a delay in responsiveness. In this paper, we propose the current control method without PLL and the method of controlling negative　sequence component using positive sequence component. The effectiveness of the proposed method against grid faults was　confirmed by experiments.