Multi-agent-system-based decentralized coordinated control for large power systems

In this paper, a decentralized coordinated control based on multi-agent system (MAS) is proposed to improve the transient stability of large power system. First, a two-hierarchical MAS is structured, which consists of upper level agent for implementing coordinated control and lower level generator unit agents for implementing decentralized control. Then, the transient stability of large power systems is analyzed based on controlling unstable equilibrium point (CUEP) method. According to transient stability assessment indexes, the upper level agent judges whether it need be activated to send coordinated control command. Afterwards, decentralized controller that is implemented by every generator unit agent, and decentralized coordinated controller is executed by the two-hierarchical MAS, are respectively designed by using H∞ robust control method integrated linear matrix inequality (LMI) technique. Finally, the effectiveness of the proposed control scheme is tested by means of simulation study.