Study on Impact of LC-Filter Parameters Under Variable Loading Conditions of Three-Phase Voltage Source Inverter

This paper studies on the impact of LC filter parameters on the load-side output of three-phase voltage source inverter (VSI) under variable loading conditions. In practice, variable active and reactive load powers have to be met up by VSI based stand-alone system. In this context, the output-side passive parameters of LC filter plays beneficial role for reducing harmonic levels at the load terminals. But, the improper choice of the LC filter parameters can restrict the range of operation of VSI under variable isolated loading conditions. Therefore, this paper focuses on the investigation of the output power limit by the designed values of LC parameters. The influencing factors, design steps of LC filter are presented in the paper to justify the obtained result. The MATLAB-SIMULINK 2014b software is used to study the above said effects.