基于IEC的光伏用直流电缆选型标准的解读

INTERPRETATION OF IEC-BASED SELECTION STANDARDS FOR PV DC CABLES

在"碳中和""碳达峰"目标的推动下,光伏产业将迎来快速发展的机遇期,但在很多光伏电站中存在光伏用直流电缆选型未考虑安全裕量、敷设系数考虑不全面等问题,这给光伏电站的长期收益和安全、稳定运行带来了挑战。基于IEC相关标准的解读,综合考虑安全系数、双面增益因子、电缆载流量、线损和压降等方面的因素,重点介绍了光伏电站中直流电缆的选型依据,并以某大型地面光伏电站为例进行了直流电缆选型分析,以期为光伏电站中直流电缆的选型提供指引。

Driven by the goals of"carbon neutrality"and"carbon peak",the PV industry will usher in a period of opportunity for rapid development.However,in many PV power stations,the selection of PV DC cables does not consider the safety margin and the laying coefficient is not comprehensive.This poses challenges to the long-term profit and safe and stable operation of PV power station.Based on the interpretation of the relevant IEC standards,the requirements for safety factor,bifacial gain factor,current carrying capacity,line loss and voltage drop are considered comprehensively.Taking a large-scale ground PV power station as an example,the DC cable selection analysis was carried out in order to provide guidelines for ground power station DC cable selection.