新型电力系统下光伏电站送出线路导线选型优化研究  

Conductor Selection Optimization for Transmission Lines of Photovoltaic Power Stations under New Power Systems

作　　者：张宗华 梁雄 黄蓓[1] 白鉴知 ZHANG Zonghua;LIANG Xiong;HUANG Bei;BAI Jianzhi(Guangxi Vocational College of Water Resources and Electric Power,Nanning 530023,China;China Energy Engineering Group Guangxi Electric Power Design Institute Co.,Ltd.,Nanning 530007,China)

机构地区：[1]广西水利电力职业技术学院,广西南宁530023 [2]中国能源建设集团广西电力设计研究院有限公司,广西南宁530007

出　　处：《红水河》2025年第2期60-63,92,共5页

摘　　要：在“双碳”目标驱动下,新能源电站低利用小时数特征引发传统导线选型标准适配性难题。笔者提出基于经济电流密度的导线选型方法。以广西某山地光伏电站为例,从截面积、运行温度、线损、机械荷载、弧垂特性、经济性等方面系统分析JL/LB20A与JNRLH1系列导线的全生命周期成本。研究表明:JNRLH1/LB20A-630/45导线方案在环境温度40℃极端工况下,运行温度安全裕度达39.3%,全寿命周期年费用最低。该研究成果攻克了传统导线选型方法在新型电力系统中的适应性瓶颈,可为高比例新能源并网工程的导线选型决策提供理论支撑。Driven by the“dual-carbon”goals,the low utilization hour characteristics of new energy power stations pose challenges to the applicability of traditional conductor selection standards.This study proposes a conductor selection method based on economic current density.Taking a mountainous photovoltaic power station in Guangxi as an example,a systematic life-cycle cost analysis is conducted for JL/LB20A and JNRLH1 series conductors,covering cross-sectional area,operating temperature,line loss,mechanical load,sag characteristics,and economic performance.The results demonstrate that the JNRLH1/LB20A-630/45 conductor scheme achieves a 39.3%safety margin in operating temperature under extreme conditions(ambient temperature of 40℃)while maintaining the lowest annualized life-cycle cost.This research addresses the adaptability bottleneck of traditional conductor selection methods in new power systems and provides theoretical support for conductor optimization in high-penetration renewable energy grid integration projects.

关 键 词：光伏电站送出线路 钢芯耐热铝合金绞线 全寿命周期成本分析 导线选型优化 经济电流密度 新型电力系统 

分 类 号：TM751[电气工程—电力系统及自动化]