南方电网技术2017，Vol.11Issue(8)：41-48,8.DOI:10.13648/j.cnki.issn1674-0629.2017.08.006
陡波下500 kV GIS同轴母线管道的暂态电场特性
Transient Electric Field Characteristics for Coaxial Bus Duct of 500 kV GIS Under Steep Wave
摘要
Abstract
To accurately guide the insulation design of coaxial bus duct of 500 kV GIS, it is necessary to study the dynamic distribution characteristics of electric field caused by structure and different voltage waveform.Taking the L-type and T-type bus bars in 500 kV GIS manufactured by a company as examples, the transient electric field characteristics under very fast transient voltage and lightning wave are studied based on time domain finite difference method.Results show that under very fast transient overvoltage, the peak val-ue of the electric field in the L-type bus is smaller than that of the electric field under steady state, but the reflection of the wave front should be paid attention to.In the T-type bus, the reflection of the electric field is larger than that in the L-type bus.The maximum value of electric field is about 1.13 times as large as the steady-state value, and there is obvious oscillation in the wave front when 4 ns ramp wave overvoltage is applied, so it is needed to use transient electric field to check the insulation design.Under lightning wave, there is no reflection in the electric field of each node in the L-type bus and the T-type bus, and the electric field can be verified by the calculation result of the electrostatic field.关键词
GIS母线/暂态电场/雷电波/特快速暂态过电压/时域有限差分法Key words
GIS bus/transient electric field/lightning wave/very fast transient overvoltage/time domain finite difference method分类
信息技术与安全科学引用本文复制引用
张福增,杨瑞,贺恒鑫,何俊佳,刘磊..陡波下500 kV GIS同轴母线管道的暂态电场特性[J].南方电网技术,2017,11(8):41-48,8.基金项目
国家工程实验室开放基金资助项目(NEL201604).Supported by National Engineering Laboratory Open Foundings of China (NEL201604) . （NEL201604）
