Using STATCOM based on two-degree-of-freedom internal model control to improve the voltage stability of islanded micro-grid

摘要

One of the main problems in the future about the development of micro-grid is the stability of micro-grid with static synchronous compensators(STATCOM). In this paper, a two-degree-of-freedom internal model control (2DOF-IMC) controller, which can improve the tracking performance and robustness of STATCOM, is designed to replace traditional PI controller in STATCOM to steady voltage of microgrid. Compare and analyze the effects of STATCOM with two controllers on the voltage stability of islanded micro-grid by impedance method. The analysis and simulate results show that STATCOM with 2DOF-IMC controller can effectively improve the stability of the microgrid voltage.