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光伏系统多峰值MPPT控制方法研究
引用本文:项丽,王冰,李笑宇,袁越.光伏系统多峰值MPPT控制方法研究[J].电网与水力发电进展,2012,28(8):68-72.
作者姓名:项丽  王冰  李笑宇  袁越
作者单位:宁夏电力调度中心, 宁夏 银川 750001;河海大学 能源与电气学院, 江苏 南京 211100;宁夏电力调度中心, 宁夏 银川 750001;河海大学 能源与电气学院, 江苏 南京 211100
基金项目:国家自然科学基金(51007019)
摘    要:实际光伏系统在被部分遮挡的情况下,带有旁路二极管的串联光伏组件呈现出多峰值的输出特性。为得到全局最大功率点,需要对其进行多峰值最大功率点跟踪(MPPT)。在单峰值MPPT控制算法的基础上,提出新的多峰值MPPT控制方法,能够通过4步,实现对最大功率点的有效跟踪。该算法的关键在于确定输出特性的谷值,以便进行定界和多区域搜索。最后通过仿真实例验证该算法的有效性。

关 键 词:光伏系统    多峰值    最大功率点跟踪(MPPT)    谷值

Multi-Peak Maximum Power Point Track Control Method of Photovoltaic System
Authors:LI Jin  QU Yong  CHEN Jian-qiang and HAN Ren-de
Affiliation:1. Dispatching Center of Ningxia Electric Power Company, Yinehuan 750001, Ningxia, China; 2. College of Energy and Electrical Engineering, Hehai University, Nanjing 211100, Jiangsu, China)
Abstract:In case that the photovohaic (PV) system is partially blocked, the PV components connected in series and with a bypass diode, show produce the multi-peak output characteristics. To obtain the global maximum power point, the maximum power point track (MPPT) is needed. Based on the single-peak MPPT control algorithm, this paper proposes a new multi-peak MPPT control method to track the maximum power point via four steps. The key point of this algorithm is obtaining the valley values of the output characteristics, which can make it convenient to get the boundary and search for the point in the multi-zone. Validity of the proposed control algorithm proves is demonstrated throughtrue by simulations of actual cases.
Keywords:photovohaic (PV) system  multi-peak value  maximum power point track (MPPT)  valley value
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