Modeling of Common Mode Interference of Secondary Side of Potential Transformer in VFTO Excitation

doi:10.16183/j.cnki.jsjtu.2023.366

Abstract

Abstract:

Very fast transient overvoltage (VFTO) is generated during the operation of isolation switches and circuit breakers in substations, which can affect the safe and reliable operation of power secondary equipment through cable transmission and spatial radiation. VFTO is a type of transient interference pulse which contains multiple frequency band interference components with frequencies reaching to 100 MHz. However, it is difficult to describe the time-frequency characteristics of VFTO interference waveforms by current electromagnetic interference models and experimental standards. Therefore, first, the generation mechanism and transmission path of VFTO in substations are analyzed and a measurement method for VFTO in substations is proposed. Macro and micro pulses of VFTO are measured on the secondary side of voltage transformers during isolation switch operation. Then, a method for the time-frequency characteristic analysis of VFTO is proposed based on synchronous compressed wavelet transform, which can obtain the time-frequency characteristics of VFTO and improve the time-domain and frequency-domain resolution. Finally, a VFTO interference model for substation is established based on attenuated damping oscillation waves and a method for extracting the model parameters is proposed based on difference evolutionary algorithm. The experimental results show that predictions made by the model are basically consistent with the measured results with a coefficient of determination (R²) is 0.85. The proposed model can describe the time-frequency characteristics of VFTO interference waveforms, providing a basis for the development of VFTO immunity standards and the operation and maintenance of power equipment.

Key words: very fast transient overvoltage (VFTO), gas insulated substation (GIS), secondary side of potential transformer (PT), differential evolution algorithm (DE)

CLC Number:

TM595

PANG Fubin, JI Jianfei, WU Xianqiang, ZHOU Mengxia, YAN Wei, XU Dong. Modeling of Common Mode Interference of Secondary Side of Potential Transformer in VFTO Excitation[J]. Journal of Shanghai Jiao Tong University, 2025, 59(6): 812-820.

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References 22

[1]	洪志湖, 彭庆军, 钱国超, 等. 220 kV GIS中VFTO传播特性的影响因素研究[J]. 高压电器, 2020, 56(12): 43-50.
	HONG Zhihu, PENG Qingjun, QIAN Guochao, et al. Research on influence factors of propagation characteristics of the VFTO for 220 kV GIS[J]. High Voltage Apparatus, 2020, 56 (12): 43-50.
[2]	MAO K, HUANG L, XU J, et al. Research on electromagnetic compatibility of secondary circuit of electronic voltage transformer under the action of VFTO[C]// 2018 IEEE Student Conference on Electric Machines and Systems. Huzhou, China: IEEE, 2018: 1-6.
[3]	许鹏程, 林建森, 林缔, 等. 改进严重度模型下计及二次系统影响的电网风险评估[J]. 电力工程技术, 2021, 40(2): 212-219.
	XU Pengcheng, LIN Jiansen, LIN Di, et al. Power grid risk assessment considering the influence of secondary system under improved severity model[J]. Electric Power Engineering Technology, 2021, 40(2): 212-219.
[4]	宋坤宇, 刘春, 王增彬. VFTO仿真中隔离开关电弧模型研究[J]. 电工技术, 2020(11): 17-22.
	SONG Kunyu, LIU Chun, WANG Zengbin. Research on arc model of disconnector in VFTO simulation[J]. Electric Engineering, 2020(11): 17-22.
[5]	吴贤强, 邹志杨, 颜伟, 等. 基于SWT的GIS电压互感器二次侧干扰分析[J]. 电力工程技术, 2021, 40(6): 134-140.
	WU Xianqiang, ZOU Zhiyang, YAN Wei, et al. PT secondary interference of GIS based on synchronous compression wavelet transform[J]. Electric Power Engineering Technology, 2021, 40(6): 134-140.
[6]	陈维江, 赵军, 边凯, 等. GIS变电站开关操作瞬态电磁骚扰研究进展[J]. 中国电机工程学报, 2019, 39(16): 4935-4948.
	CHEN Weijiang, ZHAO Jun; BIAN Kai, et al. Research progress on transient electromagnetic disturbance due to switching operations in GIS substation[J]. Proceedings of the CSEE, 2019, 39(16): 4935-4948.
[7]	闫少俊. GIS智能变电站电子式互感器技术[M]. 北京: 中国电力出版社, 2015.
	YAN Shaojun. Electronic transformer technology in GIS intelligent substation[M]. Beijing: China Electric Power Press, 2015.
[8]	赵军, 陈维江, 王德林, 等. 特快速电磁暂态(VFT)试验平台的研制[J]. 高电压技术, 2020, 46(1): 107-114.
	ZHAO Jun, CHEN Weijiang, WANG Delin, et al. Development of a very fast electromagnetic transient(VFT) test platform[J]. High Voltage Engineering, 2020, 46(1): 107-114.
[9]	中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. GB/T 2624—2006使用指南: GB/Z 33875—2017[S]. 北京: 国家标准化管理委员会, 2017.
	General Adninistration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, Standardization Administration of People’s Republic of China. Guidelines for the use of GB/T 246—2006: GB/Z 33875—2017[S]. Beijing: Standardization Administration, 2017.
[10]	RAO M M, THOMAS M J, SINGH B P. Measurement of transient electric field emission from a 245 kV gas insulated substation model during switching[J]. Journal of Electrical Engineering & Technology, 2007, 2(3): 306-311.
[11]	WANG Q, HE K, TONG Y, et al. Statistical analysis of VFTO time domain modal parameters[C]// 2023 6th International Conference on Energy, Electrical & Power Engineering, Guangzhou, China: IEEE, 2023: 101-106.
[12]	张卫东, 陈沛龙, 陈维江, 等. 特高压GIS变电站VFTO对二次电缆骚扰电压的实测与仿真[J]. 中国电机工程学报, 2013, 33(16): 187-196.
	ZHANG Weidong, CHEN Peilong, CHEN Weijiang, et al. Measurement and simulation of disturbance voltage generated by VFTO in UHV GIS substation on the secondary cables[J]. Proceedings of the CSEE, 2013, 33(16): 187-196.
[13]	康兵, 关向雨, 舒乃秋, 等. 几种时频分析方法在VFTO频谱分析中的应用[J]. 高电压技术, 2015, 41(2): 680-686.
	KANG Bing, GUAN Xiangyu, SHU Naiqiu, et al. Several time-frequency analysis methods applied in spectral analysis of VFTO[J]. High Voltage Engineering, 2015, 41(2): 680-686.
[14]	RAO M M, THOMAS M J, SINGH B P. Transients induced on control cables and secondary circuit of instrument transformers in a GIS during switching operations[J]. IEEE Transactions on Power Delivery, 2007, 22(3): 1505-1513.
[15]	赵晋飞, 张壮壮, 刘琛硕, 等. 扫频电流下不同电流频率对GIS电磁分布特性的影响[J]. 电力工程技术, 2020, 39(6): 138-142.
	ZHAO Jinfei, ZHANG Zhuangzhuang, LIU Chen-shuo, et al. Influence of different current frequencies on electromagnetic distribution characteristics of GIS under swept current[J]. Electric Power Engineering Technology, 2020, 39(6): 138-142.
[16]	胡榕, 崔翔, 陈维江, 等. 特高压气体绝缘开关设备中瞬态外壳电压测量装置的研制[J]. 中国电机工程学报, 2015, 35(23): 6235-6245.
	HU Rong, CUI Xiang, CHEN Weijiang, et al. Development of the measuring device of transient enclosure voltage in ultrahigh voltage gas insulated switchgear[J]. Proceedings of the CSEE, 2015, 35(23): 6235-6245.
[17]	刘守豹, 童理, 韦昌伟, 等. 500 kV GIS升压站主变合闸过电压影响因素分析[J]. 电工电气, 2020(5): 38-42.
	LIU Shoubao, TONG Li, WEI Changwei, et al. Analysis of influencing factors of main transformer closing overvoltage in 500 kV GIS booster station[J]. Electrotechnics Electric, 2020(5): 38-42.
[18]	文韬, 张乔根, 赵军平, 等. 特高压GIS设备现场标准雷电冲击耐压试验技术的应用[J]. 电力工程技术, 2017, 36(1): 30-33.
	WEN Tao, ZHANG Qiaogen, ZHAO Junping, et al. Application of on-site standard lightning impulse test technology for UHV GIS equipment[J]. Electric Power Engineering Technology, 2017, 36(1): 30-33.
[19]	李志兵, 陈维江, 王浩, 等. 特高压交流试验示范工程GIS隔离开关带电操作试验[J]. 高电压技术, 2012, 38(6): 1436-1444.
	LI Zhibing, CHEN Weijiang, WANG Hao, et al. Switching tests of energized GIS disconnectors in UHV AC pilot demonstration project[J]. High Voltage Engineering, 2012, 38(6): 1436-1444.
[20]	张广洲, 路遥, 万保权, 等. 1000 kV变电站保护小室屏蔽措施研究[J]. 高电压技术, 2006, 32(12): 62-65.
	ZHANG Guangzhou, LU Yao, WAN Baoquan, et al. Research on shielding measurement of 1000 kV substation protective chamber in switch yard[J]. High Voltage Engineering, 2006, 32(12): 62-65.
[21]	赵军, 陈维江, 张建功, 等. 智能变电站二次设备对开关瞬态的电磁兼容抗扰度要求分析[J]. 高电压技术, 2015, 41(5): 1687-1695.
	ZHAO Jun, CHEN Weijiang, ZHANG Jiangong, et al. Analysis on electromagnetic compatibility immunity requirements for secondary equipment during switching transient operations in intelligent substation[J]. High Voltage Engineering, 2015, 41(5): 1687-1695.
[22]	徐韵, 淡淑恒, 蔡立川. 变电站保护小室在不同屏蔽方案下的电位分布研究[J]. 高压电器, 2016, 52(5): 130-135.
	XU Yun, DAN Shuheng, CAI Lichuan. Research on potential distribution in substation protective chamber under different shielding schemes[J]. High Voltage Apparatus, 2016, 52(5): 130-135.

设备	型号	性能参数
示波器	Yokogawa DLM2054	最大采样率2.5 GS/s,最大记录长度12.5 Mpoints,带宽500 MHz
衰减器	JUJUN K1000	带宽100 MHz,衰减60 dB

算法	时域分辨率/μs	频域分辨率/MHz
STFT	0.3	10
CWT	0.5	20
GST	0.2	5
SWT	0.1	1

Goal/ MHz	Order	Fstop1/ MHz	Fpass1/ MHz	Fpass2/ MHz	Fstop2/ MHz
1.3	78	0.8	1	2	2.2
7.8	34	6.0	7	8	10.0
31	64	29.0	30	35	36.0

模型参数	a	b	c
1.3 MHz (i=1)	9918480	624354(优化为364210)	1.30
7.8 MHz (i=2)	48376007	280130	-2.73
31 MHz (i=3)	201884887	784640	-0.60