光伏系统直流弧闪计算方法综述  

Review of DC Arc Flash Calculation Methods for Photovoltaic Systems

作　　者：杨鹏 YANG Peng(CTCI Beijing Co.,Ltd.,Beijing 100011,China)

机构地区：[1]京鼎工程建设有限公司,北京100011

出　　处：《电力勘测设计》2025年第2期29-37,共9页Electric Power Survey & Design

摘　　要：光伏系统包含大量直流元件,存在直流弧闪情况。弧闪危害是电力系统中最具威胁和代价最高的电力伤害事件之一,而通过弧闪计算结果选择预防和个人防护装备(personal protective equipment,PPE)是目前最科学和行之有效的方法。目前交流弧闪计算方法相对成熟,主要参考美国电气和电子工程协会IEEE 1584标准和美国国家消防协会(NFPA)标准NFPA 70E,而直流弧闪尚无统一公认的算法。NFPA 70E-2024在附件中提供了最大功率法(Maximum Power)可对直流弧闪进行计算,IEEE 1584-2018和NFPA 70E-2024的条文中均列出了可用于直流弧闪计算的参考文献。这些文献涵盖了Maximum Power法、Stokes & Oppenlander法、Paukert 法、DGUV-I 203-077(Iterative) 法及DGUV-I 203-077(Worst-Case) 法等5种方法,本文对前述5种方法进行了综述比较。同时,结合某光伏系统项目案例,以Maximum Power法和DGUV-I 203-077 (Worst-Case)法分别进行了光伏系统直流弧闪计算,为行业从业人员提供参考。Photovoltaic system contains many DC components,and there exist DC arc flash problem.Arc flash hazard is one of the most threatening and costly power injury events in power system,and the selection of prevention measures and personal protective equipment based on the results of arc flash calculation is the most scientific and effective method at present.The method of AC arc flash calculation is mainly based on standards IEEE 1584 and NFPA 70E,which has been described a lot.At present,there is no unified and accepted algorithm for DC arc flash calculation.Only the latest version of NFPA 70E-2024 currently provides the Maximum Power method in its Annex D.5 for DC arc flash calculations.In the provisions of IEEE 1584-2018 and NFPA 70E-2024,there are specific references that can be used for the calculation of DC arc flash.Five methods were collected in these literatures,i.e.Maximum Power method,Stokes&Oppenlander method,Paukert method,DGUV-I 203-077(Iterative)method and the DGUV-I 203-077(Worst-Case)method.This paper compared these five methods.Both Maximum Power method and DGUV-I 203-077(Worst-Case)method are used to calculate the DC arc flash of a certain photovoltaic system.The results may provide guidance for the engineers in this area.

关 键 词：光伏系统 直流弧闪 入射能 

分 类 号：TM615[电气工程—电力系统及自动化]