A Novel Approach for Power Quality Improvement in Distributed Generation.

Abstract

Harmonic reduction in inverters fed from a standalone PV system is currently becoming important in medium power applications. This paper focuses on the design and analysis of various passive filters for power quality improvement in standalone PV systems. Different passive filters are designed and analysed to reduce the total harmonic distortion of the proposed system. The passive filters include LC, LCL and LLCC filter topologies. A comparison study of the total harmonic distortion reduction with the above filters is done. Further, the paper attempts to show that the use of LLCC filter with a standalone PV system can highly improve the power quality of the system. Results are verified using simulations in MATLAB-SIMULINK environment. This paper focuses on the analysis and design of various passive filter designs for a single phase standalone PV system for medium power applications. The passive filter design is carried out with LC, LCL and LLCC filter topologies. The work evaluates the total harmonic distortion (THD) using each passive filter and a comparison is done with respect to power quality improvement.   This paper is organised as follows: Section II discusses in brief the modelling of the standalone PV system. Section III describes the various passive filter designs for the standalone PV system. Section IV analyses the simulation results and Section V concludes the work.