光伏发电系统防雷检测方法

在了解光伏发电站的构成和工作原理,掌握光伏发电系统的防雷装置和接地特性参数的基础上,参照相关的防雷规范划分光伏发电站防雷类别,提出了使用输出电流较大的检测设备,采用异频小电流、GPS定位系统配合,对电站的光伏方阵区和交流输配电设备区2个重点区域的检测方法,针对每一个特性参数给出了要求值和测试结果判断.采用异频小电流干扰小、操作安全,GPS定位测距准确,测试方法比较科学,测试取得的数据准确可靠,可有效判断光伏发电系统防雷和接地装置的性能.

Test method of lightning protection in solar photovoltaic system

Based on the knowledge of hardware structure and working principle of solar photovoltaic plant,as well as the technical parameters and the grounding performance of lightning protection equipment,this paper categorize the lightning protection grades of solar photovoltaic plant in accordance with related lightning protection standards.A method to test the lightning protection in photovoltaic system is proposed with measuring equipment of relatively large output current,and different frequency & small current test combined with help of GPS.The photovoltaic cell matrix section and power transmission & distribution equipment are chosen to be the key areas to test the lightning protection.Expected values are listed for every technical parameter and compared with measured result.This test method is low in disturbance,safe in operation,accurate in GPS locating,thus is reasonable and practical to test and judge the performance of lightning protection and grounding equipment in photovoltaic system.