中国电机工程学报2016，Vol.36Issue(13)：3692-3698,7.DOI:10.13334/j.0258-8013.pcsee.152178
计及套管导体辐射损耗的VFTO计算方法
VFTO Calculation Method Considering Radiation Loss of Bushing Conductor
摘要
Abstract
Through research in very fast transient overvoltage(VFTO) test circuit of UHV AC test base, it is found that the decay time of calculated VFTO single breakdown waveform is more than that of measured waveform. This result will affect the evaluation of hemi-wave time of VFTO standard waveform through simulation. So the research of loss mechanism is needed. Based on the poor considering of radiation loss of bushing conductor in CIGRE recommended model and other literatures, this paper firstly analyzed the traveling wave mode of current distribution on bushing conductor, deduced the calculation formula of radiation resistance and average characteristic impedance of bushing conductor and build transmission model of bushing considering radiation loss. Then the frequency domain calculation method of VFTO was proposed in order to handle the frequency dependent parameter of radiation resistance. The calculation results in VFTO test circuit show that the radiation resistance of bushing conductor is much bigger than the arc resistance and the bus-bar resistance at main frequencies, and meanwhile the decay time is much more close to that of the measured waveform. Therefore the rationality of the proposed calculation method has been verified.关键词
特快速瞬态过电压/气体绝缘变电站/传输线方法/辐射损耗/辐射电阻/特征阻抗Key words
very fast transient overvoltage (VFTO)/gas insulated substation (GIS)/transmission line method/radiation loss/radiation resistance/characteristic impedance分类
信息技术与安全科学引用本文复制引用
赵军,陈维江,张建功,李志兵,王磊..计及套管导体辐射损耗的VFTO计算方法[J].中国电机工程学报,2016,36(13):3692-3698,7.基金项目
国家重点基础研究发展计划项目(973项目)(2011CB 209405)；国家电网公司科技项目(GY71-11-050，GY71-14-036，GY71-14-074)。 The National Basic Research Program of China (973 Program)(2011CB209405) （973项目）
Science and Technology Project of SGCC(GY71-11-050, GY71-14-036, GY71-14-074) （GY71-11-050, GY71-14-036, GY71-14-074）
