模糊系统的光伏系统最大功率点跟踪.docVIP

Fuzzy System Based Maximum Power Point Tracking for PV System 基于模糊系统的光伏系统最大功率点跟踪 Bogdan M.Wilamowski and Xiangli Li University of Idaho, Boise Graduate Center wilam@ and sl Abstract Maximum power point tracking for PV systems traditionally uses either perturbation and observation method or incremental conductance method. Both methods require modulation of the output voltage and this leads to significant power loss. In this paper, a method, which senses output circuit voltage and short circuit current and use the above two parameters for optimum control with a fuzzy controller, is introduced. The short circuit current of PV cell represent illumination, and the output circuit voltage carry on information about the temperature. 摘要 光伏系统最大功率点跟踪通常使用扰动观察法或电导增量法，两种方式都需要调整输出电压这将导致显著的能量损失。在本文中提出一种方法，该方法测量输出电路的电压和短路电流并使用上述两个参数通过模糊控制器实现最优控制。光伏电池的短路电流反映光照，输出电路的电压代表温度信息。 I. Introduction With the industrial development, the problem of energy shortage is more and more aggravating. The Photovoltaic (PV) system technologies are rapidly expanding and have increasing roles in electric power technology and regarded as the green energy of the new century[1-2]. I．引言 随着工业的发展，能源短缺的问题越来越严重，作为新世纪的绿色能源，光伏发电系统在电力技术方面迅速扩大和日渐作用[1-2]。 As the power supplied by solar arrays depends on the light illumination intensity, temperature and array voltage. It is necessary to track the maximum power of the solar arrays[2]. Some paper had proposed different maximum power point (MPPT) control methods in the past years. Two methods are proposed in this paper to track the maximum power point and use the fuzzy system to control the circuit to achieve the maximum power point and increase the efficiency of the PV system[3-6]. 由于太阳能电池板提供的功率决定于光照强度、温度和阵列电压，因此跟踪太阳能电池板的最大功率是非常有必要的。在过去的几年中，一些论文已经提出不同的最大功率点控制方式。本文提出了两种跟踪最大功率点的方法，该方法应用模糊控制系统控制回路实现最大功率点从而增加光伏系统的效率。 II. Operation Principle of Solar Cell Solar array characteristic profoundly influences the converter and control system. A solar