接入分布式光伏的低压配电台区线损计算方法  

Calculation Method of Line Loss in Low-Voltage Distribution Transformer Supply Zone with Distributed Photovoltaic Access

作　　者：宋瑞萍 Song Rui-ping(Enhe Power Supply Station,Zhongning County Power Supply Company,State Grid Ningxia Electric Power Co.,Ltd.,Zhongwei 755000,Ningxia Hui Autonomous Region,China)

机构地区：[1]国网宁夏电力有限公司中宁县供电公司恩和供电所,宁夏中卫755000

出　　处：《科学与信息化》2024年第20期118-120,共3页Technology and Information

摘　　要：分布式光伏的接入使低压配电台区内的电能流动变得更为复杂,容易导致线损计算结果与实际产生偏差。据此本文提出了一种线损计算方法,即通过引入配电台区负荷不平衡度,评估三相负荷的分配均匀性,计算低压配电台区的线损值;确定线损修正系数,修正理论线损值。实验结果表明,利用所提方法计算接入分布式光伏的低压配电台区线损与实际线损的偏差较小,能够精确地计算低压配电台区线损,从而更好地评估台区线损状况。The distributed photovoltaic access produces more complicated electric energy flow in low-voltage distribution transformer supply zone,which easily lead to the deviation between the calculation results of line loss and the actual situation.Accordingly,this paper proposes a line loss calculation method,that is,introducing the load unbalance degree in distribution transformer supply zone,evaluating the three-phase load distribution uniformity,and calculating the line loss value in low-voltage distribution transformer supply zone;determining the correction factor of line loss,and correcting the theoretical line loss value.The experimental results show that the deviation between the calculated line loss and the actual line loss of low-voltage distribution transformer supply zone with distributed photovoltaic access is small by using the proposed method,which can accurately calculate the line loss of low-voltage distribution transformer supply zone,so as to better evaluate the line loss of such zone.

关 键 词：接入分布式光伏 低压配电台区 线损计算 不平衡度 

分 类 号：TM7[电气工程—电力系统及自动化]