The control principle and simulation of duty cycle perturbation in Photovoltaic systems

• Published in: 2013 Ninth International Conference on Natural Computation (ICNC) pp. 1691 - 1695
• Main Authors: Fang, Bo, Guo, Lihui, Kang, Longyun
• Format: Conference Proceeding Journal Article
• Language: English
• Published: IEEE 01.07.2013
• Subjects: Arrays; Computational modeling; Computer simulation; control principle; Control systems; duty cycle perturbation (DCP); Mathematical model; Mathematical models; Maximum power point trackers; maximum power point tracking (MPPT); perturbation and observation algorithm (P&O); Perturbation methods; photovoltaic (PV); Photovoltaic cells; Photovoltaic systems; Power systems; PSIM simulation; Solar cells; Strategy; Tracking
• ISSN: 2157-9555; 2157-9563
• DOI: 10.1109/ICNC.2013.6818254

Duty cycle perturbation is widely applied in Photovoltaic (PV) Maximum Power Point Tracking (MPPT) control strategy, but its Control Principle hasn't been studied deeply. According to mathematical physics model of PV Cell, the PV Boost converter based on Duty Cycle Perturbation (DCP) control is deduced, and control principle of DCP-based hill climbing method is analyzed and simulated with Power Simulation (PSIM). The simulation results show validity of the theoretical analysis. On this basis, the importance of initial duty cycle value to increasing of start-up speed and photoelectric conversion efficiency is pointed out, and train of thoughts will be provided for improvement of MPPT control strategy, which is of practical significance for engineering design of PV system.