摘要
本文分别对分散式逆变光伏电站站内的交流和直流线损进行了实地检测,分散式逆变器的电缆铺设结构是:组串直流至逆变器--逆变器交流至汇流箱--汇流箱交流至开关站--开关站经过升压至外网。检测组串直流至逆变器的电缆两端电压,再测量直流电流做好记录,通过实际测试数据计算组串直流至逆变器MC4光伏专用直流电缆线的线损;分别选择长中短不同距离的三个逆变器的MC4直流电缆做检测来平均计算直流线损的准确数据。检测逆变器交流至汇流箱的电缆两端电压,再测量交流电流做好记录,通过实际测试数据计算逆变器交流至汇流箱三相四线交流电缆线的线损;
In this paper,the AC and DC line losses in the distributed inverter photovoltaic power station are detected on thespot.Thecable layingstructure of the distributed inverteris:DC to inverter,AC to bus box,ACto bus boxto switchingstation,and the switching station isboosted to external network.Detect thevoltage atboth ends ofthe DC-to-inverter cable,measure theDC current and record it,and calculatethe line loss of the DC-to-inverter MC4 dedicated DC cable through the actual test data.Three inverters MC4 DC cables with different distances are selected for detection to calculate the accurate data of DC line loss on average.Detecting the voltage at both ends of the cable from the inverter AC to the bus box,measuring the AC current and recording it,and calculating the line loss of the three-phase four-wire AC cable from the inverter AC to the bus box through the actual test data;Three-phase four-wire AC cables from three bus boxes at different distances are selected to the bus boxes for detection to calculate the accurate data of AC line loss on average.
作者
郑占治
Zheng Zhanzhi(Jiangxi Xinganeng photovoltaic Technology Co.,Ltd.Ruijin Jiangxi,342500)
出处
《电子测试》
2019年第3期119-120,140,共3页
Electronic Test
关键词
光伏电站站内
交流直流线损检测
photovoltaic power station station
AC/DC line loss detection
