中国电机工程学报Issue(33)：5948-5955,8.DOI:10.13334/j.0258-8013.pcsee.2014.33.019
1000 kV交流同塔双回线路工频相参数测量计算
Measurement and Calculation of Power Frequency Phase Parameters of 1000kV AC Double-circuit Transmission Lines on the Same Tower
摘要
Abstract
ABSTRACT:Power frequency phase parameters of transmission lines are essential parameters of overvoltage calculation, so it is necessary to obtain the phase parameters of 1000kV AC double-circuit transmission lines on the same tower before the lines are put into operation. Phase parameters of short distance lines can be accurately obtained by measurement and calcalation without taking into consideration their distributed parameter characteristic, while errors tend to arisefor long distance lines. In order to get accurate phase parameters of long distance UHV transmission lines, a multiconductor transmission line was modeled and analyzed byπ lumped parameter and distributed parameter equivalent circuit respectively in this paper. A method was proposed to obtain mutual capacitances between phase conductors by measuring the voltages or currents at both ends of each phase conductor and calculating mutual admittances equations between phase conductors. Equations of mutual impedances between conductors were deduced based on the distributed parameter characteristic of lines. Self-parameters of phase conductors were calculated according to the relationship equations between the voltages and currents on both sides of phase conductors. The results indicate that calculation errors of the parameters can be reduced by adopting the methods, which has been verified by means of simulation. The methods were used to obtain the phase parameters of 1000 kV Huainan-WuhuⅠandⅡ lines of eastward transmission of Anhui electric power and can provide exact data for overvoltage calculation of the project.关键词
1 000 kV交流/同塔双回线路/相参数/测量Key words
1000kV AC/double-circuit transmission lines on the same tower/phase parameters/measurement分类
信息技术与安全科学引用本文复制引用
陈维江,傅中,王贻平,孙岗,叶剑涛,刘楠,陈国强,夏令志..1000 kV交流同塔双回线路工频相参数测量计算[J].中国电机工程学报,2014,(33):5948-5955,8.基金项目
国家重点基础研究发展计划项目(973项目)(2011209405)；国家电网公司科技项目(SGJLJSFW(2013)494)。The National Basic Research Program of China (973 Program)(2011209405) （973项目）
Science and Technology Project of SGCC (SGJLJSFW (2013)494) （SGJLJSFW (2013）
