Exhaustive Comparison between Linear and Nonlinear Approaches for Grid-Side Control of Wind Energy Conversion Systems

In this paper, we propose a comparative study of linear and nonlinear algorithms designed for grid-side control the power flow in wind energy conversion system. We performed several simulations experiments with step variable scenarios different values DC-link capacity DC storage element being key converter. The was on basis internal model theory where an active damping added to avoid steady state errors. Nonlinear controls were built using first second order sliding mode theoretical considerations ensure accuracy stability. observed that most efficient algorithm controlling voltage but chattering degraded quality injected into grid as well efficiency caused overshoots voltage; however, had better performance side due its smoother control. Finally, did not prove be more robust than other two algorithms. This can explained by fact is theoretically sensitive converter losses.