A phase A fundamental positive sequence voltage selected unit based on LPF substitutes for the original ip-iq PLL to ensure exact voltage of A phase is selected even in case of imbalance three phase voltage.是什么意思_A phase A fundamental positive sequence voltage selected unit based on LPF substitutes for the original ip-iq PLL to ensure exact voltage of A phase is selected even in case of imbalance three phase voltage.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句