a superposition principle of waveform based on conceptions of waveform continuity and flexible regulation of voltage proposes three concepts , respectively being flexible ac transformation , flexible power transmission and transformation and flexible voltage regulation ; proposes three new technologies , respectively being a transient impedance technology , a flexible stepless voltage regulation technology and a flexible stepped voltage regulation technology ; proposes three new products , being an ac voltage regulating electronic switch , a transient impedance transformer and a high - speed voltage regulating transformer ; proposes six high - voltage power grid connection methods , being a power grid connection method type of a transient impedance transformer , a power grid connection method of a transient impedance step up auto transformer and the like ; and proposes a new reactive compensation connection method for a reactive compensation device .