A Finite-Time Consensus Method of Load Aggregators for Power System Frequency Control

Nowadays, the high penetration of renewable energy in power systems reduces the sharing of traditional synchronous generators, which brings many challenges in system frequency regulation. The demand-side resources e.g the responsive loads can be utilized for power system ancillary services and reserve capacities. In this paper, distributed controlled load aggregators are proposed for power system frequency regulation. A finite-time leader-following communication protocol is proposed for aggregation of load aggregators, where there is a leader to share the power reference and multiple load aggregators to track the requirement. The automatic generation control signal for secondary frequency regulation and local frequency measurement are received by the leader control to generate reference signal. As a result, both the distributed controlled load aggregators and synchronous generators will participate in the power system frequency regulation. The proposed method is tested on a single-area power system under various operation conditions.