屋顶光伏发电系统防雷设施经济有效性评价

Evaluation on Economic Validity of Lightning Protection Facilities of Roof Photovoltaic Generation Systems

雷电灾害是影响屋顶光伏发电系统安全的最严重的自然灾害之一,增设雷电防护装置,减少因雷电造成的损失的同时增加了系统投入。文章介绍了通过比较安装雷电防护装置增加的成本和安装后减少的雷击造成的经济损失,进行防雷装置经济有效性评价,以IEC62305-2经济损失风险计算模型为基础,考虑屋顶光伏发电系统雷击特点及对正常售电的影响。以一5k V屋顶光伏发电系统为例,提供了具体计算、分析过程,为项目方案设计提供参考。

The lightning disaster is one of the most serious natural disasters influencing the safety of roof photovoltaicgeneration systems. Lightning protection devices can be installed to reduce losses caused by lightning disasters,however, increase the system investment. The economic benefit is the main factor that the investors care about. It isavailable to improve investment enthusiasm and prevent natural disasters by clarifying the economic validity oflightning protection devices. In this paper, we introduces the method of validity evaluation of lightning protectiondevices by making a comparison between the increased cost in the installation of lightning protection devices and thereduced economic losses after the installation. Based on the IEC62305 - 2 economic loss risk calculation model, wecalculated of economic losses by taking the lightning characteristics of roof photovoltaic generation systems and theirinfluences on normal power sales into consideration. Besides, taking a 5 kV roof photovoltaic generation system as anexample, we illustrated specific process of calculation and analysis, which could provide references for the futureproject design.