Abstract
This paper presents an improved strategy to provide better maximum power point tracking (MPPT) performance and increase energy yield during transient state of MPPT process. This strategy is based on the estimation of short circuit current (SCC) of the photovoltaic (PV) system without short circuit. Besides that, this strategy aims to decrease convergence time to maximum power point (MPP) by preventing real short circuit of PV source and eliminating the additional switch requirement. To determine performance of the proposed strategy, simulation studies have been performed in MATLAB/Simulink and this strategy has been compared with fractional SCC (FSCC) technique and perturb and observe (P&O) algorithm. In addition, to make validation experimentally, a low powered single ended primary inductance converter (SEPIC) is realized. Both simulation and experimental results show that proposed strategy performs better transient MPPT performance than FSCC technique and P&O algorithm.
Highlights
MAXIMUM power extraction of a PV system is an essential operation since PV systems have small power conversion efficiency
Among maximum power point tracking (MPPT) algorithms, perturb and observe (P&O) algorithm is widely used in industrial applications due to ease of implementation
Proposed strategy collects more energy during initialization interval compared with the fractional SCC (FSCC) approach
Summary
MAXIMUM power extraction of a PV system is an essential operation since PV systems have small power conversion efficiency. A power processing unit (PPU) is inserted between PV modules/array and load, battery and/or electrical grid. A PPU in a PV system should provide energy conversion with maximum efficiency. Lots of MPPT techniques have been presented to get the biggest efficiency and maximize energy from PV modules/arrays [1]. Among MPPT algorithms, P&O algorithm is widely used in industrial applications due to ease of implementation. Its performance is poor in dynamic environmental conditions. Some parameters of P&O should be https://orcid.org/ 0000-0002-6228-4112
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