Closed Loop Control of Transformerless Grid Tied Inverter

摘要

In order to reduce the total harmonic distortion (THD) in the transformerless grid connected system, the concept of H5 inverter topology is proposed in this paper. This paper presents closed loop control of H5 inverter topology at different load conditions. In H5 inverter topology, instead four switches as used in conventional single phase H4 inverter, five switches are used. Hence, the complete system consists of five power switches, LCL filter, proportional-integral controller and proportional-resonant controller and it is realized using MATLAB^R platform. Performance analysis of the studied inverter is evaluated at different load conditions.