高压电器2018，Vol.54Issue(2)：76-83,8.DOI:10.13296/j.1001-1609.hva.2018.02.013
特高压GIS现场冲击耐压试验暂态过电压及其抑制方法研究
Research on Ultra-high-voltage GIS On-site Lightning Impulse Withstand Voltage Test Transient Over-voltage and Its Restraining Method
摘要
Abstract
Gas insulated switchgear(GIS)has been widely used in electrical power system.During the on-site lightning impulse withstand voltage test of GIS,when the underproof GIS discharges,high-amplitude oscillating overvoltage will take place,which may threaten the intact equipments.In this paper,we developed a ATP-EMTP transient analyzing model of ultra-high-voltage GIS on-site lightning impulse withstand voltage test system and fault arc.The over-voltage amplitude and its restraining method has been investigated.The results show that the calculated voltage waveforms matches well with the test waveforms,indicating that the fault arc model can simulate the discharging process accurately.The fringe nodes in the test system will cause the total reflection of transient voltage,making the over-voltage amplitude higher than 2 400 kV.The over-voltage amplitude on top of the no-load bushing can be restrained after the introduction of the low-damping transient voltage restrainer.The parameter Cr=800 pF、Rr=100 Ω is suggested,which can effectively make the oscillating voltage lower than 2 400 kV.关键词
特高压GIS/现场冲击耐压试验/故障电弧模型/暂态过电压/抑制方法Key words
ultra-high-voltage GIS/on-site lightning impulse withstand voltage test/fault arc model/transient over-voltage/restraining method引用本文复制引用
季斌炜,谷永刚,刘子瑞,郭安祥,王帅,文韬,张乔根..特高压GIS现场冲击耐压试验暂态过电压及其抑制方法研究[J].高压电器,2018,54(2):76-83,8.基金项目
国家电网公司科技项目资助(SGSNKY00KJJS1501562).Project Supported by Science and Technology Program of State Grid Corporation of China(SGSNKY00KJJS1501562). （SGSNKY00KJJS1501562）
