This paper presents Maximum Power PointControl for variable speed wind turbine driven permanentmagnet generator. The wind turbine generator is operated such that the rotor speed varies according to wind speed to adjust the duty cycle of power converter and maximizes Wind Energy Conversion System (WECS) efficiency. The maximum power point for each speed value is traced using Maximum Power Point Tracking (MPPT) algorithm. The rotating speed of permanent-magnet generator should be adjusted in the real time to capture maximum wind power. The system includes the wind-turbine, permanent-magnet generator (PMG), three-phase rectifier, boost chopper, inverter and load. The control parameter is the duty cycle of the chopper. PMG is made to operate at variable speed to achieve good performance. The entire WECS model consists of wind turbine model, PMG model and power converters model. The MATLAB / SIMULINK is used for simulation and the results are compared with laboratory setup.

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The power electronic devices may lead to power quality problems which can be overcome by power conditioning techniques. This paper proposes power conditioning scheme based on fuzzy logic for load side inverter. In this configuration a single-phase cascaded multilevel inverter is worn to control the reactive power. The DC output from PV panel is applied to 5-level inverter topology. This is configured using two capacitors and six switches. The power quality issues of this inverter output can be analyzed and controlled by using rule based process in fuzzy controller. Fuzzy control is implemented with the help of FPGA. The design and performance of fuzzy controlled multilevel inverter strategy are verified through numeric simulation.