特高压GIS变电站VFTO波形衰减仿真研究

王磊; 刘衍; 冯宇; 王浩; 赵军

引用本文:	王磊,刘衍,冯宇,等.特高压GIS变电站VFTO波形衰减仿真研究[J].电力系统保护与控制,2019,47(22):45-51.
	WANG Lei,LIU Yan,FENG Yu,et al.Simulation research on VFTO waveform attenuation in UHV GIS substation[J].Power System Protection and Control,2019,47(22):45-51

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特高压GIS变电站VFTO波形衰减仿真研究
王磊¹,刘衍²,冯宇¹,王浩³,赵军¹
(1.中国电力科学研究院有限公司, 湖北武汉 430074;2.国网江西省电力有限公司电力科学研究院，江西南昌 330096;3.中国电力科学研究院有限公司, 北京 100192)

摘要:

为研究特高压GIS变电站VFTO计算中波形衰减程度与实测相差较大的原因，首先介绍了我国某特高压变电站VFTO实测波形的产生方式和波形特征；其次对VFTO波形的衰减因素，如弧道电阻、盆式绝缘子、GIS弯管和GIS套管的模型进行了分析。在可能产生的电磁泄漏或辐射等损耗的基础上改进了原有IEC推荐模型。最终建立了GIS变电站的整体仿真模型。通过对实测波形的等值转换，将仿真条件与实测波形进行统一后，获得不同模型下的仿真波形特征。结果表明考虑所研究的波形衰减因素后，仿真波形的衰减程度与实测更加吻合，验证了所提出模型的合理性。

关键词: 特快速瞬态过电压特高压气体绝缘变电站辐射电阻波形衰减

DOI：10.19783/j.cnki.pspc.181520

分类号:

基金项目:国家电网公司科技项目资助(GY71-16-006)“特高压工程过电压精密仿真及高频过电压新型抑制导线研究”

Simulation research on VFTO waveform attenuation in UHV GIS substation

WANG Lei¹,LIU Yan²,FENG Yu¹,WANG Hao³,ZHAO Jun¹

(1. China Electric Power Research Institute, Wuhan 430074, China;2. State Grid Jiangxi Electric Power Research Institute, Nanchang 330096, China;3. China Electric Power Research Institute, Beijing 100192, China)

Abstract:

In order to study the reason why the waveform attenuation degree is quite different from the actual measurement in the VFTO calculation of UHV GIS substation, this paper first introduces the generation mode and waveform characteristics of the measured VFTO waveform of a UHV substation in China. Then the possible attenuation factors of the VFTO waveform, such as the arc resistors, basin insulators, GIS elbows and GIS bushings are analyzed. The original IEC recommended model is improved based on possible electromagnetic leakage or radiation loss. Finally, the overall simulation model of GIS substation is established. Through the equivalent conversion of the measured waveform, the simulation conditions are unified with the measured waveform, and the simulated waveform characteristics under different models are obtained. The results show that after considering the waveform attenuation factors studied in this paper, the attenuation degree of the simulated waveform is more consistent with the actual measurement, and the rationality of the proposed model is verified. This work is supported by Science and Technology Plan of SGCC ‘Study of Accurate Simulation of Overvoltage in UHV Project and Study of a New High Frequency Overvoltage Suppression Wire (No. GY71-16-006)’.

Key words: very fast transient overvoltage (VFTO) UHV gas insulated substation (GIS) radiation resistance waveform attenuation

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