Comparative analysis of power quality mitigation in PV array system

Abstract

Renewable Energy in PV array system has gained its popularity in these days due to its user friendly approach in reducing the carbon foot print. Since the usages are also applied on the grid connected power line, it may also one of the contributors to the harmonic distortion in the power systems. There are many factors that are contributing to this issue and every root cause need to be studied and mitigated based on the analysis. The harmonic analysis in this study will be focused on the non-linear load which consists of the battery charges and UPS as the main source of the harmonic issue. Currently, there are three mitigation techniques identified for the harmonic analysis started by single tuned filter tuned at 5th order, 5th and 7th order tuned filter and 3rd order C-type filter. Once the parameters for every component are fully verified, the simulation will be conducted on the topology using ETAP software for harmonic analysis. The standard limits of IEEE 519 1992 is used as a benchmark in this study in order to provide the best output and to reduce the THDI below the limit even for some individual harmonic number and to reflect the power factor output. Based on the simulation result and projection to every mitigation technique, the 5th and 7th order tuned filter seems to be the most feasible approach in justifying electrical and cost. This methodology are able to reduce the THDI below the IEEE-519 standard while on the standpoint for cost and electrical advantage, the 5th and 7th order tuned filter is the best solution on the harmonic mitigation problem in this study since it is able to reduce the THDI effectively from 15.90% to 0.33% and improving the power factor.