A new control method of wind energy in power system

摘要

This paper addresses the new method of controlling wind turbine connected to the grid and presents the approach for implementing wind energy as a distributed generation in a power system. With the aid of a fuzzy controller that regulates the modulation index of PWM inverter in an AC-DC-AC converter, and controllable battery storage connected to DC Bus, output of voltage even during changing wind speed or unbalanced load will remain stable. The control system uses the rule-base defined on the load voltage error of the point of common coupling to determine the instantaneous value of modulation index and battery amount. This technique can give a full flexibility to the grid to provide power from wind turbines, an extra control factor for smart grids and gives this ability to have more control on a system. As a power electronics technique, it also can be used in hybrid PV/Wind energy systems. Performance of the proposed method is illustrated by simulation results.