Research on Improved Perturbation and Observation Method of MPPT Used in Grid-connected Photovoltaic System

摘要：

This paper introduces the Maximum Power Point Tracking(MPPT)algorithm used in grid-connected photovoltaic system. For the shortcomings of traditional Perturb and Observe (PO), this paper presents an improved method combining Open-Circuit Voltage and the PO with variable perturbation steps.The proposed algorithm takes different tracking measures according to working states of the system.In order to realize the stability of maximum power point (MPP), small perturbation is adopted around MPP to control tracking speed of the system. When in steady state, oscillation phenomenon will be effectively eliminated in the vicinity of MPP. As a result, it would enhance the utilization of solar energy and achieve MPPT systems performance.

关键词： grid-connected photovoltaic system maximum power point tracking the perturb and observe

作者: Shuping Liu Jinfeng Chen

作者单位: Information and Network Management Center North China Electric Power University Baoding 071003, China

会议类型: 国际会议

会议名称: The 10th International Conference on Intelligent Technologies(第十届智慧科技国际会议 InTech09)

会议地点: 桂林

会议语种:英文

页码: 656-659

在线出版日期: 2009-12-12（万方平台首次上网日期，不代表论文的发表时间）