Hamed Heydari - Dep. Electrical Eng. Semnan UniversitySemnan, Iran
Reza Keypour - Dep. Electrical Eng. Semnan UniversitySemnan, Iran

This letter proposes an optimal control to improve low voltage ride through capability of wind turbine that is connected to Grid and STATCOM devise, and compares two kinds of robust control such as H-infinity and mixed of H-two and H-infinity to improve the rate of fault clearing and uncertainty of test system.

Grid Code, Optimal control, Robust control, STATCOM, Uncertainty, Wind turbine