This paper summarizes the common requirements for excitation regulator according to the current problems and new challenges in engineering. Low-frequency oscillation restraining

coordinate control of main and auxiliary loop

condenser control strategy

multi-scene support and so on are researched

and a new technology platform for excitation controller adapted to the current requirements is proposed. The key function module of synchronous sampling

dual redundancy control

closed-loop control

pulse generator

smart diagnosis in excitation regulator are all realized

and the reliability design of key points is discussed in detail. The new excitation regulator based on this new platform has been applied successfully in some large power plants

magnetic control reactors and large synchronous condensers.