Power Passive Filter Tuning Based on Transient Response Specification Mapping for Inverter in Residential-Scale Renewable Energy Systems

Abstract

This paper proposes a new method to tune LC filter parameters that will be utilized to attenuate the undesirable harmonic output voltage of a single-phase inverter to generate output waveform approaching pure sinusoidal. This method transforms two-order transient time-domain equation specification through LC filter transfer function parameter equations, thus forming simultaneous non-linear equations. These non-linear simultaneous equations are solved by applying the Jacobian iteration method. The iteration is run until it converges to any points that represent the required filter parameters. This method offers better results than the existing related methods through Spice simulation in voltage and current THD. The simulation results show the identical voltage and current THD value, which is 0.016%. The impact of the utilization of damper resistor is also analyzed. By using Spice simulation, it is found that the filter circuit without damper has a power efficiency approaching 99%. Meanwhile, by using a damper, the power efficiency is reduced to 89,039% due to the dissipated power in the damper element. (Abstract)

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