BUCK–BOOST-BASED GRID-CONNECTED PV INVERTER FOR MAXIMUM POWER EXTRACTION FROM DUAL PV ARRAYS UNDER MISMATCHED ENVIRONMENTAL CONDITIONS

Abstract

This paper recommends a photovoltaic (PV) inverter that is connected to a single-phase grid without a transformer. The inverter optimizes the power output of two serial subarrays in either buck or boost mode. This is accurate despite the fact that each subarray has its own environment. The construction of a subarray with the fewest serially connected solar photovoltaic modules is facilitated by an inverter that can operate in either buck or boost mode, depending on the application. As a result, the power output of each subarray increases in response to varying environmental conditions. In order to safeguard the common mode voltage from high-frequency components, the design necessitates the inverter management technique and architecture. This is required by the design. This is implemented to maintain the amplitude of the leakage current in the PV array within a predetermined range. The range can exhibit a high level of operational effectiveness. The feasibility of the project is ascertained through a comprehensive investigation of the system, the development of a mathematical model, and the implementation of rigorous computer simulations. In order to validate the concept, additional investigation is required in addition to the 1.5-kW laboratory prototype.