Title :
The control principle and simulation of duty cycle perturbation in Photovoltaic systems
Author :
Bo Fang ; Lihui Guo ; Longyun Kang
Author_Institution :
Sch. of Electr. Inf. Eng., Xuchang Univ., Xuchang, China
Abstract :
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.
Keywords :
maximum power point trackers; photovoltaic power systems; power convertors; power system control; DCP-based hill climbing method; MPPT control strategy; PV boost converter; PV cell; PV system; control principle; duty cycle perturbation control; duty cycle value; engineering design; mathematical physics model; photoelectric conversion efficiency; photovoltaic maximum power point tracking control; photovoltaic systems; power simulation; start-up speed; Arrays; Computational modeling; Mathematical model; Maximum power point trackers; Photovoltaic systems; Power systems; PSIM simulation; control principle; duty cycle perturbation (DCP); maximum power point tracking (MPPT); perturbation and observation algorithm (P&O); photovoltaic (PV);
Conference_Titel :
Natural Computation (ICNC), 2013 Ninth International Conference on
Conference_Location :
Shenyang
DOI :
10.1109/ICNC.2013.6818254
