Wind - fire Coordination System Frequency Control Parameter Tuning Method

Abstract

The large scale of renewable energy has brought new challenges to the frequency stability and higher requirements on frequency regulation capability. So it is necessary to control wind turbines to provide frequency regulation. Integrated inertial control can provide inertia support and primary frequency regulation for the power grid, and it can improve system frequency characteristics, which is an effective way to maintain the frequency stability of the power system with high penetration of renewable generations. The frequency controller parameters determine the frequency regulation effect, which also influence the operation and mechanical wear of the wind turbines. Based on the principle of integrated inertial control, the influence of frequency controller parameters on the frequency response characteristics was theoretically analyzed, and a segmented tuning method of frequency controller parameters with frequency stability constraints is proposed in this paper. Then system frequency response model including different types of generators were then established for parameters tuning and simulation. Finally, a four-machine two-area system is utilized to validate the proposed frequency controller parameters tuning method. The result shows that the proposed method will be helpful to improve the frequency stability of the system.