This article describes a Buck and Boost Grid-Connected PV Inverter that maximizes power output from two PV arrays under unfavorable climatic circumstances

Abstract

For maximum power extraction from two serially linked subarrays, a single phase grid-connected transformerless photovoltaic (PV) inverter, which may work in either buck or boost mode and can extract the maximum power concurrently from both subarrays, is presented in this study. When employing an inverter that can function in buck or boost mode depending on the application, it is much less limiting to use a minimum number of serially linked solar PV modules to construct a subarray. Because of this, when each subarray is exposed to a new set of environmental factors, the power yield from each subarray grows. For the leakage current associated with PV arrays to stay within a given range of values, the topological configuration of the inverter and its control technique must be such that high-frequency components are not present in the common mode voltage. On top of that, a high level of productivity is maintained during the whole working range. In order to determine whether or not a project is feasible, a detailed study of the system is carried out, leading to the creation of a mathematical model of the system. A 1.5 kW laboratory prototype is needed to show the design's correctness via extensive testing..