Abstract
Power system interconnection makes the modern power system become a huge and complex network, which brings great challenges to frequency stability. The pinning control strategy can reduce the control cost and has a unique advantage. It is one of the most effective method to solve the problem of complex network synchronization. Thus, based on the principle of pinning control strategy, a frequency synchronization control method is proposed to solve the problem of power grid frequency synchronization in this paper. Firstly, in the controller design phase, the pinning control model of a power system is defined based on mathematical model of hydroelectric generator. And the pinning controller is designed based on dynamic compensation LMI sliding mode control. The correctness of the controller is verified by the simulation of a Lorenz chaotic system. Secondly, to determine the controlled generator nodes, an index for evaluating the importance of the generator nodes is defined based on the node deletion method and fuzzy method. Finally, combined with the reality of power network, the external coupling matrix L is calculated based on the successive extended annular domain method and considering the ability of the nodes to receive signals. The feasibility of this method is verified by simulation of the IEEE30-bus system.
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