ENHANCEMENT OF SINGLE STAGE GRID CONNECTED PV AND BATTERY SYSTEM FOR THE RELIABILITY AND EFFICIENCY BY USING A BATTERY CURRENT SHARING TECHNIQUE AND MINIMIZING RELIANCE OF ELECTROLYTIC CAPACITORS

Abstract

Conventionally, the single-stage grid-connected PV inverter needs a large PV-side electrolytic capacitor to suppress the double-line frequency current ripple to keep the PV operating at maximum power point (MPP). However, the short lifetime electrolytic capacitor will reduce the PV inverter’s reliability dramatically. In order to overcome the above problem, a novel battery current-sharing power decoupling (BCSPD) method for hybrid photovoltaic (PV) power systems is proposed in this paper. The proposed BCSPD circuit is parallelly connected with the string PV module to achieve as a single-stage topology. Thus, a high power conversation efficiency can be obtained. The current-injection method is adapted to solve the current ripple problem. As a result, long-lifestyles movie capacitors may additionally replace electrolytic capacitors and the needed capacitance on the PV facet can be drastically reduced. To fulfil the needs of actual-global packages, the energy regulation characteristic is likewise completed via the usage of the battery garage gadget with hunch manipulate. The gadget's overall performance changed into evaluated the use of a 1200 W prototype that turned into built and positioned into motion. Tracking MPP, regulating the burden energy scenario, and decreasing cutting-edge ripple are all talents proven experimentally via the cautioned gadget. In this current study the fuzzy logic controller used to check the PV power system without the proposed BCSPD circuit, Wave forms of the proposed BCSPD circuit, The measured waveforms when the proposed BCSPD circuit works in daytime, The measured waveforms when the proposed BCSPD circuit work at night