Abstract
This chapter introduces a robust control scheme of load frequency control (LFC) of a micro-grid system integrated with a wind energy system. The control scheme is based on H∞ and linear quadratic Gaussian techniques. The main idea of the control design is to be stable against the parameter’s uncertainties and the load disturbance. A complete model of the power system with the DFIG has been linearized. This model has been utilized to design both controllers of H∞ and linear quadratic Gaussian. The H∞ is designed by optimal selecting of the weighting functions to ensure the robustness and to enhance the overall performance. Also, the full states considering the frequency deviation are assessed based on the standard Kalman filter method. Moreover, the states of the system are applied with the linear quadratic Gaussian feedback optimal control performance under normal and abnormal operating conditions. Simulation tests are applied with the purpose of validation of the overall controllers’ performance. The results proved the superiority of the planned integration of the wind energy system with the micro-grid.KeywordsRobust controlLoad frequency controlLinear quadratic gaussianH∞Wind energy system
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