高电压技术2012，Vol.38Issue(12)：3310-3315,6.
特高压GIS变电站中快速暂态过电压仿真及其特性分析
Simulation and Characteristics Analysis of Very Fast Transient Overvoltage in Gas Insulated Substation with Ultra High Voltage
摘要
Abstract
In the computer simulation process of very fast transient overvoltage (VFTO), establishing an accurate model of gas insulated substation(GIS)component is a key factor that affects the accuracy of VFTO. Thus, a VFTO overall simulation model was established combining the inner transient model and the model of transmission characteristics of GIS enclosures. Moreover, A dynamic arcing model was proposed based on the arc physical process, and a metal oxide surge arrester(MOA) transient circuit model was established based on the polarization theory in alternating electric field. By 3D electric field analysis, an accurate GIS equipment equivalent model and its parameters were obtained based on the body structure of the GIS. Furthermore, according to the transmission lines theory and the phase-model transformation method, the GIS enclosure was modeled, and a transient ground model was established by taking the mutual induction within the grounding body into consideration. Finally, taking a 1 100 kV GIS as example, we simulated the VFTOs in detail. The results show that the per unit amplitude of the VFTO in the segmented dynamic arc model is up to 1. 270 { taking the corresponding value as a reference), increased by 17. 59% over that of the index variable arc model. After taking the nonlinear characteristics of the MOA into consideration, the oscillation of the VFTO amplitude decreases persistently, and is reduced by 20% when the simulation time is close to 20. According to the comparison between the simulation results and the measured waveform analysis, the difference of per unit VFTO amplitude is in a range of 0.2~0.4, indicating the presented overall VFTO simulation model is valid.关键词
隔离开关/特高压（UHV）/动态电弧模型/GIS变电站/快速暂态过电压（VFTO）/金属氧化锌避雷器（MOA）/暂态模型Key words
disconnector/ultra high voltage(UHV)/dynamic arcing model/gas insulated substation(GIS)/very fast transient overvohage{ VFTO)/metal oxide arrester{MOA)/transient model分类
信息技术与安全科学引用本文复制引用
王娜,林莘,徐建源,王飞鸣,王静..特高压GIS变电站中快速暂态过电压仿真及其特性分析[J].高电压技术,2012,38(12):3310-3315,6.基金项目
基金资助项目：辽宁省自然科学基金 （）
教育部高等学校博士学科点专项科研基金（20092102110001）. （）
