Electric arc-flash energy calculations for photovoltaic systems
Electric arc-flash energy calculations for photovoltaic systems
复制标题
光伏系统的电弧闪能量计算
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Yuventi
中科院分区：
文献类型：
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作者：
J. Yuventi
在过去十年中，光伏系统的安装数量和安装规模都有所增加。随着越来越多的公用事业运行系统的建设，在设计和分析阶段考虑操作员和维护人员的安全是很重要的。不幸的是，一个潜在的安全隐患，电弧闪光，是没有很好地了解光伏系统。这种危险释放的热能可能很大，特别是在高电压和高电流下运行的大型光伏系统中。本文研究了典型设计的基础上，光伏系统中的电弧闪光周围的条件。使用现有的直流电弧模型和基本电路理论，开发了方程和分析技术来估计如果发生这些危害可能释放的热能。这些技术可以用来确定危险的系统组件最危险的类别，直到更多的经验模型开发。
Photovoltaic systems have increased in both the quantity of installations and the size of installations over the past decade. As more utility-run systems are being constructed, it is important to consider the safety of operators and maintenance crew during the design and analyses phases. Unfortunately, one potential safety hazard, the electrical arc-flash, is not well understood for photovoltaic systems. The thermal energy released by this hazard can be significant, especially in large photovoltaic systems operating at high voltages and currents. This paper examines the conditions surrounding electric arc-flashes in photovoltaic systems based on typical designs. Using existing models for DC arc-flashes and basic circuit theory, equations and analysis techniques are developed to estimate the thermal energy that can be released if these hazards were to occur. These techniques can be used to determine the hazard-risk-category for the system components most at risk, until more empirical models are developed.