高电压技术2018，Vol.44Issue(1)：14-21,8.DOI:10.13336/j.1003-6520.hve.20171227002
特高压半波长交流输电系统过电压特性及对策
Characteristics and Countermeasures of Overvoltage in UHV AC Half-wavelength Transmission System
摘要
Abstract
The mechanism and characteristics of overvoltage of half-wavelength transmission line (HWTL) are different from those of the conventional lines.Overvoltage limitation is one of the key issues for the engineering application of half-wavelength transmission technology.We analyzed the generating condition and mechanism of overvoltage of HWTL,and established a simulation model of UHV half-wavelength AC transmission system.Furthermore,we studied the amplitude,duration,and waveform characteristics of overvoltage of HWTL under different conditions.According to the overvoltage characteristics under different conditions,the corresponding countermeasures were put forward.The results show that the severest overvoltage is generated when ground fault occurs on HWTL.The fault overvoltage can be limited within allowable range by metal oxide arresters (MOAs) along the line and fast active grounding measure at the middle of the line.The energy of MOA during fault can meet the requirements.关键词
特高压/半波长输电/过电压/抑制措施/接地故障Key words
ultra high voltage/half-wavelength transmission/overvoltage/limitation measure/ground fault引用本文复制引用
韩彬,王平,张媛媛,班连庚,项祖涛,谷鹏..特高压半波长交流输电系统过电压特性及对策[J].高电压技术,2018,44(1):14-21,8.基金项目
国家电网公司科技项目(XT71-16-005).Project supported by Science and Technology Project of SGCC (XT71-16-005). （XT71-16-005）
