非均匀辐照下TCT结构光伏阵列输出特性研究

Output characteristics of TCT structure PV array under the non-uniform irradiation

网络状连接方式(Total-Cross-Tied,TCT)结构光伏阵列在组件表面辐照度轻度不均匀情况下输出稳定性最优,其阵列输出特性具有重要的研究意义。文章以一种基于Matlab/Simulink中S-Function Builder模块建立的光伏组件仿真模型为基础,从组件电流电压变化的角度分析了TCT结构光伏阵列在非均匀辐照下的输出特性曲线,结果表明:TCT结构光伏阵列在不同失配条件下具有不同输出特点,为以后电站的建设规划与运营维护提供了参考依据。

The TCT（Total-Cross-Tied）topological structure has optimal stability of output performance when the co-plane irradiance of photovoltaic（PV） module is slightly non-uniform. It is significant to research the output characteristics of TCT topological structure. In this paper, a simulation model of PV modules is formed which is based on the S-Function Builder in MATLAB/Simulink.Focusing on variations of PV module output current and voltage, a PV array model with TCT connection is constructed and the output characteristic curves under non-uniform irradiance conditions were analyzed. The result showed that the output characteristics of TCT topological structure are different under different mismatch conditions. The proposed model can provide reference to build and maintain PV plants in the future.