Passive Damping Filter Design and Application for Three-Phase PV Grid-Connected Inverter

Second and third-order passive filters (LC and LCL) are interesting filters to use for grid-connected PWM inverters. Because of the stability problems of this filter around resonance frequency, series and damping resistor can be add to an LCL filter. However, the resistor value has impact on the filter respond, voltage and current harmonic distortion and system power loss. In this paper, the mathematic characteristics of LC, LCL filter, series and parallel damping LCL filters will be described with their design to apply in 3-phase PV grid-connected inverter. And, simulations are used to validate the theoretical analysis of the filters on filter performance and power quality of the grid in 3-phase grid-connected inverter. P.Kamalakar"Passive Damping Filter Design and Application for Three-Phase PV Grid-Connected Inverter" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-1 | Issue-6 , October 2017, URL: http://www.ijtsrd.com/papers/ijtsrd2495.pdf http://www.ijtsrd.com/engineering/electrical-engineering/2495/passive-damping-filter-design-and-application-for-three-phase-pv-grid-connected-inverter/pkamalakar