VFTO仿真中GIS隔离开关电弧模型的研究

摘要/Abstract

摘要：

气体绝缘变电站（GIS）中快速暂态过电压（VFTO）严重影响相关设备的安全运行和绝缘强度设计,在仿真计算中,用合理的电弧模型得到较为准确的VFTO波形就显得尤为重要。本文提出虚拟电感电弧模型,结合某1 000kV GIS变电站,通过与其他电弧模型对比,对GIS内部关键设备处的VFTO做了详细的研究,并研究了仿真步长对VFTO的影响。结果表明,虚拟电感模型是考虑弧道电感特性的电弧电阻模型的继续,相比于时变电阻模型和定值电阻电弧模型,考虑了弧道电感特性,并且解决了考虑弧道电感特性的电弧电阻模型中动态电感难以搭建并且影响系统稳定性的问题,在VFTO的研究中,适合在考虑电弧电感特性时使用。

关键词: 气体绝缘变电站, 快速暂态过电压, 电弧模型, 虚拟电感, 仿真步长

Abstract:

The very fast transient over-voltage (VFTO) in gas insulated substation (GIS) seriously affect the safe operation of the related equipment and the designing of insulating strength. So in the simulation calculation, accurate VFTO waveform under the reasonable arc model is particularly important. In this paper, virtual inductance arc model is put forward, combining with some 1 000kV GIS substation and comparing with other arc model, and detailed VFTO research of internal key equipment of GIS is made, and the influence of simulation step on VFTO is made. Result shows that virtual inductance arc model is continued of arc resistance model considering arc inductance characteristic, and it takes into account the inductance characteristics of arc compared with time-varying resistance model and the fixed value resistance model of the arc. Dynamic inductance is difficult to set up and affect the system stability in arc resistance model considering arc inductance characteristic, but virtual inductance arc model can solve the problem, so virtual inductance arc model is suitable for use when considering inductance characteristic of arc in the study of VFTO.

Key words: Gas insulated substation, very fast transient over-voltage, arc model, virtual inductance, simulation step

中图分类号:

TM564.1

刘德东,何人望,黄戡,詹骥文. VFTO仿真中GIS隔离开关电弧模型的研究[J]. 电气工程学报, 2015, 10(6): 88-93.

Liu Dedong,He Renwang,Huang Kan,Zhan Jiwen. Research of Gas Insulated Substation Switching Arc Model in the Simulation of Very Fast Transient Over-Voltage[J]. Journal of Electrical Engineering, 2015, 10(6): 88-93.

图/表 9

图1

图2

图3

图4

图5

表1

图6

表2

图7

参考文献 17

[1]	林莘 . 现代高压电器技术[M]. 2版.北京: 机械工业出版社, 2011.
[2]	刘教民, 杜巍 , 等. VFTO仿真中GIS隔离开关电弧模型的研究进展[J]. 高压电器, 2013,49(5):21-25.
	Liu Jiaomin, Du Wei . The research progress of isolating switch arc model in GIS simulation of VFTO[J]. High Voltage Apparatus, 2013,49(5):21-25.
[3]	Vinod V Kumar, Joy Thomas M, Naidu M S . Influence of switching conditions on the VFTO magnitudes in a GIS[J]. IEEE Transactions on Power Delivery, 2001,16(4):539-544. doi: 10.1109/61.956734
[4]	谷定燮, 修木洪, 戴敏 , 等. 1000 kV GIS变电所VFTO特性研究[J]. 高电压技术, 2007,33(11):27-32.
	Gu Dingxie, Xiu Muhong, Dai Min , et al. VFTO characteristic research of 1000 kV GIS substation[J]. High Voltage Technology, 2007,33(11):27-32.
[5]	刘德东, 吴文辉, 何人望 , 等. 考虑弧道电感特性的电弧电阻模型下VFTO的研究[J]. 高压电器, 2015,51(1):105-109.
	Liu Dedong, Wu Wenhui, He Renwang , et al. The VFTO research under the arc resistance model caring about inductance characteristics[J]. High Voltage Apparatus, 2015,51(1):105-109.
[6]	詹花茂, 郑记玲 , 等. 短空气间隙弧阻模型的研究[J]. 高压电器, 2012,48(10):12-16.
	Zhan Maohua, Zheng Jiling , et al. Study of arc resistance model for short air gap[J]. High Voltage Apparatus, 2012,48(10):12-16.
[7]	吴文辉 . 电力系统电磁暂态计算与EMTP应用[M]. 北京: 中国水利水电出版社, 2012.
[8]	郭洁, 刘振, 赵丹丹 , 等. 750 kV GIS中运行方式对快速暂态过电压的影响[J]. 电网技术, 2008,32(S2):233-235.
	Guo Jie, Liu Zhen, Zhao Dandan , et al. Influence of operation modes to very fast transient voltage in 750kV GIS[J]. Power System Technology, 2008,32(S2):233-235.
[9]	卢江平, 杨兰均, 贾涛 , 等. 1 100kV GIS 隔离开关分合容性小电流试验中的暂态电压测量[J]. 高压电器, 2009,45(6):106-109.
	Lu Jiangping, Yang Lanjun, Jia Tao , et al. Transient voltage measurement in switching small capacitive current test of 1100 kV GIS disconnector[J]. High Voltage Apparatus, 2009,45(6):106-109.
[10]	阮全荣, 施围, 王亮 . 限制GIS中隔离开关操作引起的过电压的研究[J]. 高压电器, 2006,42(1):18-20.
	Ruan Quanrong, Shi Wei, Wang Liang . Study on suppression of switching overvoltage caused by operation of disconnector in GIS[J]. High Voltage Apparatus, 2006,42(1):18-20.
[11]	王娜, 林莘, 徐建源 , 等. GIS中隔离开关电弧模型对快速暂态过电压的影响[J]. 电工电能新技术, 2013,32(1):85-88.
	Wang Na, Lin Shen, Xu Jianyuan . The influence of isolating switch arc in the GIS model to fast transient overvoltage[J]. Advanced Technology of Electrical Engineering and Energy, 2013,32(1):85-88.
[12]	孟涛, 林莘, 徐建源 . 分段电弧模型VFTO的计算与分析[J]. 电工技术学报, 2010,25(9):69-73.
	Meng Tao, Lin Shen, Xu Jianyuan . Calculation of VFTO on the condition of segmental arcing model[J]. Transactions of China Electrotechnical Society, 2010,25(9):69-73.
[13]	Povh D, Schmitt H, Valcker O . Modeling and analysis guidelines for very fast transients[J]. IEEE Transac-tions on Power Delivery, 1996,11(4):2028-2035.
[14]	邵冲, 杨钰, 王赞基 . GIS 开关电弧建模及其对 VFTO 波形的影响[J]. 电网技术, 2010,34(7):200-205.
	Shao Chong, Yang Yu, Wang Zanji . Modeling of GIS switching arc and its effect on VFTO waveforms[J]. Power System Technology, 2010,34(7):200-205.
[15]	史保壮, 张文元, 顾温国 , 等. GIS中快速暂态过电压的计算及其影响因素分析[J]. 高电压技术, 1997,23(4):19-25.
	Shi Baozhuang, Zhang Wenyuan, Gu Wenguo , et al. The analysis of GIS fast transient over-voltage calculation and its influencing factors[J]. High Voltage Technology, 1997,23(4):19-25.
[16]	王晓彤, 班连庚, 林集明 , 等. 1000kV紧凑型输电线路的电气参数及电磁暂态分析[J]. 电网技术, 2012,36(3):9-14.
	Wang Xiaotong, Ban Liangeng, Lin Jiming , et al. Analysis on electrical parameters and eletromagnetic transient of 1000kV compact transmission line[J]. Power System Technology, 2012,36(3):9-14.
[17]	林莘, 李爽, 徐建源 , 等. 考虑GIS外壳传输特性的VFTO计算模型[J]. 电网技术, 2010,34(11):203-207.
	Lin Xin, Li Shuang, Xu Jianyuan , et al. Calculation model of VFTO considering transmitting character- ristics of GIS enclosure[J]. Power System Technology, 2010,34(11):203-207.

节点位置	VFTO幅值(pu)
节点位置	定值电阻模型	时变电阻模型	虚拟电感模型
变压器	1.069 8	1.149 7	1.150 2
变压器QS	2.085 1	2.034 5	1.983 4
操作QS	1.675 3	1.708 8	1.708 8
母线端部	2.423 1	2.639 0	2.519 3

步长/ns	节点位置
步长/ns	变压器	操作QS	母线端部
0.5	1.152	1.769	2.642
1	1.150	1.709	2.519
1.5	1.146	1.699	2.496
2.0	1.141	1.724	2.364
2.5	1.135	1.750	2.343