南方电网技术2017，Vol.11Issue(12)：76-84,9.DOI:10.13648/j.cnki.issn1674-0629.2017.12.012
同塔输电线路零序互感参数的规律研究
Study on the Regularity of Zero-Sequence Mutual Inductance Parameters of Transmission Lines on the Same Tower
摘要
Abstract
Zero-sequence mutual inductance is an important factor affecting the fault characteristics of transmission lines on the same tower.In order to get its accurate value in a convenient way,the zero-sequence parameters of the transmission lines on the same tower when soil resistance,tower structure,height,and sag changes are studied.The results show that the effect of tower structure on mutual zero-sequence inductance is significant,besides the accepted soil resistivity.For the multi-circuit transmission lines,those circuits which near the earth,whose zero-sequence self-inductances are significantly larger than those which near the overhead ground wire.Based on that,the law of zero-sequence mutual-inductance/self-inductance ratio influenced by soil resistivity is also studied,and a method of zero-sequence mutual-inductance estimation based on voltage level and tower structure is proposed.PSCAD simulation verifies the good robustness of using subdivision ratio to estimate the zero-sequence mutual-inductance of transmission lines on the same tower,and the method's accuracy satisfies the engineering requirement.关键词
同塔输电线路/零序互感/杆塔结构/土壤电阻率Key words
transmission lines on the same tower/zero-sequence mutual inductance/tower structure/soil resistivity分类
信息技术与安全科学引用本文复制引用
李晓华,刘飘,李帆,张陈泽宇,蔡旺延,张少凡,曹杰..同塔输电线路零序互感参数的规律研究[J].南方电网技术,2017,11(12):76-84,9.基金项目
国家自然科学基金资助项目(51377059,51677073),广州供电局有限公司科技项目(GZM2014-2-0028).Supported by the National Natural Science Foundation of China (51377059,51677073) （51377059,51677073）
Science and Technology Project of Guangzhou Power Supply Bureau Co.,Ltd.(GZM2014-2-0028). （GZM2014-2-0028）
