Robust distributed control of reactive power in a hybrid wind‐diesel power system with STATCOM

Summary Distributed generation is an interesting way to provide electricity, especially for areas that are far from the electrical grid. Because of the unpredictable nature of renewable sources, centralized control schemes are not reliable. In this paper, a robust distributed controller was designed for an isolated hybrid power system (IHPS) with a static synchronous compensator. To this end, a multi‐unit hybrid wind‐diesel system was investigated. Kharitonov's theorem was used for designing robust PI controller parameters of the IHPS. Moreover, the system stability analysis was conducted by Kharitonov polynomials according to the zero inclusion principle, Hurwitz matrix stability examination, and Mikhail's criterion. By suggesting and accomplishing several scenarios, the performance and robustness of the proposed controller were inspected under different disturbances. For the purpose of ability comparison, the pure PI and fuzzy‐PI controllers tuned by the GWO algorithm were applied. Simulation results showed that dynamic responses of the power system were improved by the proposed controller. Furthermore, the results emphasized that the proposed Kharitonov's theorem‐based controller was robust against large disturbances.