陈 谦（山东意匠建筑设计有限公司，济南市 250022）

张金勇（济南工程职业技术学院，济南市 250200）

陈谦   张金勇

Analysis of Measures for Atmospheric Overvoltage Protection of Rooftop PV Systems

CHEN Qian(Shandong Yijiang Architectural Design Co.,Ltd.,Ji’nan 250022，China)

ZHANG Jinyong(Jinan Engineering Vocational Technical College,Ji’nan 250200，China)

Abstract：In this paper,the risks of lightning strike in three scenarios are introduced. The damage source and risk of atmospheric overvoltage are considered based on specific conditions. By referring to the latest requirements in international standards and the latest results in relevant literature,this paper analyzes the induced overvoltage of PV systems without external lightning protection systems,focuses on risk assessment for atmospheric overvoltage protection of electrical installations and the characteristics of and methods for risk assessment of atmospheric overvoltage of PV systems,and provides solutions to the setting,selection, and locating of AC SPD and DC SPD for PV systems based on case study.

Key words：PV system;atmospheric overvoltage;risk assessment;induced surge;insulation coordination;calculated risk level;critical length; surge protective device(SPD)

摘　要：介绍3种雷击风险，其中大气过电压的损害源、风险情况具有特殊性；引用国际标准的最新要求和相关文献的最新成果，分析不设外部防雷装置的光伏系统感应过电压具体情况，重点解决电气装置大气过电压防护的风险评估和光伏系统大气过电压的特点、风险评估方法，以实际示例分析和解决光伏系统交流SPD和直流SPD的设置、选择，以及设置位置问题。

关键词：光伏系统；大气过电压；风险评估；感应电涌；绝缘配合；计算风险水平；临界长度；电涌保护器

中图分类号：TU895                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.11.004