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This paper presents a single-phase grid-connected PV system supplying nonlinear load which controls active power and harmonic compensation. The control method employs calculated reference current derived from a combination between the active current and the compensated harmonic current. The active current for controlling transferred power from solar panels to the grid system is obtained from MPPT. The compensated harmonic current is responsible for nonlinear load. With this method, power of renewable energy can be transferred to nonlinear load and the utility grid system, the grid current can be a noticeable sinusoidal and the reactive power of nonlinear load will be compensated. As a result, power factor is nearly unity. The simulation results confirm the validation through MATLAB/Simulink for both steady state and dynamic response conditions. L g

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This paper presents the self-tuning fuzzy controller (SFLC) for zero voltage switching power supply (ZVS). The main objective is to apply SFLC for output voltage controlling in case of load variation. The structure of SFLC consists of conventional fuzzy controller with scale factor selftuning path which output performance is maintained by adjusting the scale of input membership function. Moreover, the practical ZVS design algorithm based on computer program is also proposed for more convenient to obtain the optimal ZVS parameter. Finally, the numerical calculation parameter and experimental results of ZVS both without SFLC and with SFLC in case of no load and on load are achieved respectively.