光伏系统雷电防护特性仿真分析

由于光伏系统具有面积较大、暴露设备较多且需考虑直击雷防护装置阴影对太阳能电池板的遮挡影响等特点,因此其雷电屏蔽与传统电站存在差异。为更深入地了解光伏系统的雷电防护特性,结合光伏系统结构和雷电侵入途径,采用ATPDraw仿真软件,对光伏阵列及其电气设备进行建模,仿真计算了雷击光伏阵列不同位置、不同雷电流幅值及不同接地电阻情况下光伏阵列的损坏程度和对光伏系统内部设备过电压的影响,并根据计算结果提出了光伏系统雷电防护的重点。

Simulation Analysis of Lightning Protection Characteristics of hotovoltaic System

photovoltaic system has characteristics, such as large area, many exposed device and the impact of direct lightning protection device shadows on the shelter of solar panels. Therefore, it exist difference between lightning shielding for photovoltaic system and conventional power plants. For a better understanding of photovoltaic system lightning protection performance, simulation software ATPDraw is used to modeling photovoltaic array and electrical equipment by considering photovoltaic system structure and lightning invasion way. Under the conditions of lightning photovoltaic array of different position, different lightning current amplitude and different grounding resistance, it simulates the damaged condition of photovoltaic array and the impact of photovoltaic system internal equipment over-voltage. According to the calculation results, it puts forward the focal point of lightning protection of photovoltaic system.