谐波标准下的配电网理论线损研究  

Research on Theoretical Line Loss of Distribution Network Under Harmonic Standard

作　　者：曹庆 朱俊 谢荣斌 周群[1] 闫东辉 CAO Qing;ZHU Jun;XIE Rongbin;ZHOU Qun;YAN Donghui(College of Electrical Engineering,Sichuan University,Chengdu 610065,Sichuan,China;Xifeng Power Supply Branch,Guizhou Power Grid Co.,Ltd.,Xifeng 551100,Guizhou,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]贵州电网息烽供电分公司,贵州息烽551100

出　　处：《电气传动》2021年第4期56-62,共7页Electric Drive

基　　金：贵州电网公司科技项目(GZKJXM20171037)。

摘　　要：为了准确计算电网理论线损,考虑谐波环境下趋肤效应对阻值的影响,结合等值电阻法,对传统理论线损计算公式进行修正。运用提出的修正式子,通过两个算例,验证谐波对10 kV及以下配网理论线损的影响。算例一根据《GB/T 14549—1993电能质量公用电网谐波》中规定的公共连接点PCC注入谐波电流的允许值,计算某地区电网由谐波标准规定允许的谐波含量所造成的额外损耗;算例二根据实测数据计算出某加工厂380 V侧线路损耗。有效分析了谐波含量对配电网线损的影响,证明了将谐波造成的额外损耗计入理论线损中的必要性。In order to calculate the theoretical line loss accurately,traditional theoretical line loss formula was revised according to the equivalent resistance method of skin effect with harmonic.By the revised calculation formula proposed,two examples were given to verify the influence of harmonics on theoretical line loss of distribution network with 10 kV and below.Example 1:according to the allowable value of injecting harmonic current into PCC(point of common coupling)stipulated in《GB/T 14549—1993 Harmonics of Power Quality Public Power Grid》,the additional losses caused by the allowable harmonic content were calculated.Example 2,the loss of 380 V line in the processing plant was calculated,on the basis of the measured data and the modified formula.The influence of harmonic content on line loss of distribution network was analyzed effectively,and the necessity of incorporating additional loss caused by harmonic into theoretical line loss was proved.

关 键 词：谐波标准 理论线损 趋肤效应 等值电阻法 谐波电流畸变率 

分 类 号：TM711[电气工程—电力系统及自动化]