Fuzzy based feed forward control for voltage compensation of smart grid using bidirectional intelligent semiconductor transformer and PV cell

摘要

This paper proposes the solid state transformer which has been controlled by the fuzzy controller. The proposed solid state transformer is designed to reduce the large voltage deviation on the dc bus of the solid-state transformer (SST) when the load suddenly changes. Fuzzy logic controller can effectively reduce the voltage deviation, it can be easily modified, robust, and control many inputs and outputs. However in existing system proportional-integral (PI) control technique is used to clear error signal and produce gate signal to the power semiconductor switches. The experimental results in a 2-kW SST prototype are provided to verify the proposed fuzzy logic control schemes and show the superior performances. The aim of this paper is to introduce a high efficiency fuzzy based feed forward control for solid state transformer. The proposed solid state transformer is modeled and verified through simulation by using MATLAB/SIMULINK.