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An Inductive Active Filtering Method for Power Quality Improvement in Grid Connected PV System

Abstract

This paper proposes a new strategy for power quality (PQ) improvement in a 3-Φ grid connected photovoltaic (PV) system is proposed in this paper. The Particle Swarm Optimization (PSO) maximum power point tracking (MPPT) scheme has been used to force the PV generation to reach the maximum power operation. A battery energy storage system (BESS) along with a bi-directional DC/DC converter is introduced to maintain constant DC bus voltage level in the DC bus. An inductively active filtering method is used to improve the power quality is used for both the distribution network (public grid) and in the power-supply system (nonlinear load) connected to the network. In this method harmonic components can effectively prevented from flowing into the primary (grid) winding of the transformer. Since the existing harmonic components are suppressed near the harmonic source itself, it is good for the powersupply system and especially for the converter transformer & PQ of the public network can be guaranteed completely.

M.Senthilkumar, K.Sameeullah

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