PID-Based Pitch Angle Controller Scheme for PMSG-Based Wind Energy Conversion System

In recent years, the Wind Energy Conversion System (WECS) usage has been increasing with rapid expansion. WECS has a highly nonlinear characteristic and the wind speed is also inherently uncertain. The output power regulation of the WECS at operating conditions above the rated wind speed is one of the subjects of intense interest to researchers. This regulation may be implemented through controlling the pitch angle of the wind turbine. This study presents a PID-based pitch angle controller scheme to realize this purpose in PMSG-based WECS. System configuration and whole controller designs are modeled and created in the simulation environment. In addition, a wind speed profile including both below-rated and above-rated wind speeds is created and the PID-based pitch angle controller is tested in detail for these conditions. According to the results obtained, it is seen that a good control dynamic can be obtained and power regulation is performed effectively by reaching and remaining the pitch angle to needed reference values at above-rated wind speeds. Moreover, with the designed scheme, appropriate adaptation to the changes in different operating points is provided.