Prospects of the Applying of UPFC in Modern Distribution Network

Taking the unified power flow controller as an example, this paper states the applying foreground of flexibility AC transmission system technology in distribution systems, which comprise wind power generators. As for the impacts of the wind power on the power systems, this paper indicates the deficits of the unified power flow controller, proposes the idea that integrating the energy storage system into the DC bus of the unified power flow controller, and the hybrid PCH control method can deal with the hybrid systems introduced in above.