A Comparative Analysis Between Various Filters for Three Phase Current Source Inverter

Abstract

This paper investigates three-phase Current Source Inverter (CSI) behaviors energized by battery storage sources replacing Photovoltaic solar system. This source provides energy to a three-phase balanced load throughout passive filters. Various types of filters’ configurations are utilized in order to reduce the current and voltage ripples at the inverter output and to reduce the loading stress over the battery bank. Three configurations of filters are investigated C, CLC, and LCL filters with respect to the drawn load current, battery current, and battery loading rate. A mathematical model for various filters is derived and simulation model using LabVIEW and Multisim platforms were conducted to follow the inverter behaviors when the filters’ parameters changed. A comparative analysis between these filters is conducted by changing the filters’ capacitance and inductance and following the inverter behaviors. The obtained simulation results stated that LCL filter with Wye connected capacitors presents better performances with respect to output voltage level, loading current, load to battery current utilization ratio at moderate capacitor values comparing with other filters but this advantage disappears at high values of used capacitors due to drawn large battery current.