Emergency Coordinated Frequency Control Strategy for Multi-DC Infeed Receiver Network

Abstract

For the receiver network with multiple DC feed-in, the DC locking fault seriously affects the safe and stable operation of the receiver network. This paper presents a frequency emergency coordinated control system which takes into account three measures: DC coordinated control, pumping and storage pump, and cutting off interruptible load. Two control strategies are developed, which are quick action from afar and frequency action on the spot. Both schemes have their own fault criteria. Finally, the two control strategies are analyzed and compared through the simulation of East China Power Grid.