Open AccessGlobal MPPT algorithm with coordinated control of PSO and INC for rooftop PV array
Author(s) -
Liu Jinhua,
Li Junyin,
Wu Jianan,
Zhou Wenhui
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0437
Subject(s) - maximum power point tracking , photovoltaic system , particle swarm optimization , piecewise , control theory (sociology) , maximum power principle , computer science , shading , voltage , power (physics) , algorithm , mathematical optimization , mathematics , control (management) , engineering , electrical engineering , artificial intelligence , physics , inverter , mathematical analysis , computer graphics (images) , quantum mechanics
Considering the characteristics of rooftop photovoltaic (PV) array, a new mathematical model of PV array that is suitable for partial shading condition is built based on an engineering model of a solar cell. It is derived theoretically that output voltage of PV array can be expressed by piecewise function. Moreover, a global maximum power point tracking (MPPT) control method based on particle swarm optimisation (PSO) and incremental conductance algorithm (INC) coordination control is put forward under partial shading. When the environmental conditions are stable, MPPT can be achieved by INC control; otherwise, when the external conditions change, global maximum power point of PV systems can be located fast and accurately by PSO. So, the tracking efficiency is improved. Simulation results show that the PSO and INC coordination control methods have better tracking precision. It can be achieved easily and reduce hardware input costs. It also improves the PV array output efficiency.