Study and Simulation for MPPT Control of Photovoltaic Generation System Based on Combining Constant Voltage Method with Adaptive Duty Cycle Perturb Method

Abstract:

A MPPT (Maximum Power Point Tracking) control method of PV (Photovoltaic) generation system is proposed based on the shortcoming of the existing MPPT algorithms. The method applies CVT (Constant Voltage Tracking) algorithm to adjust the working point of PV array near the MPP (Maximum Power Point) for fast tracking when working point is far from MPP, and uses adapting duty cycle perturb method to optimize the steady state characteristic of MPP for effectively eliminate the output power oscillation under the setting precision. Its model is established and simulated with Matlab/Simulink.The CVT, duty cycle method and proposed methods are simulated respectively and simulation results show that, the proposed method tracks the MPP exactly and quickly and improves the energy conversion efficiency of PV generation system by eliminate the output power oscillation around MPP. Its fast response speed improves the static and dynamic performance of photovoltaic power system.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 2590-2595
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.2590
• Online since: November 2011
• Authors: Wang Dong Yun, Xu Qi Ying, Zhu Yong Sheng, Xiao Jun Ming, Hu Jiang Xue
• Keywords: Adaptive Duty Cycle Perturb Method, Constant Voltage Method, MPPT, Photovoltaic Generation System

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