Wideband Frequency-Domain Measurement of Large-Scale Electrical Equipment
Chen Ning1, Qi Lei1, Zheng Yiming2, Cui Xiang1, Zou Guoping2
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy SourcesNorth China Electric Power University Beijing 102206 China; 2. State Grid Zhejiang Electric Power Research Institute Hangzhou 310014 China
Abstract：High voltage electrical equipment’s large size results in the use of very long measurement leads, when measuring broadband impedance. Long leads could seriously affect the measuring results. An on-site measurement method is put forward in this paper using impedance analyzer. The method uses coaxial cable's appropriate shielding connection to ensure the consistency of measurement results under different space wiring. At the same time, the influence of long measurement cable on measurement results is compensated by open/short/load correction. The principle of the method is explained in this paper, and the accuracy of the method is verified in the laboratory and in the field. The on-site measurements show that the method can accurately measure the wide-band impedance of the equipment in the power system in the frequency of MHz.
[1] 刘欣, 崔翔, 梁贵书, 等. 基于分数阶微分理论的宽频建模方法[J]. 电工技术学报, 2013, 28(4): 20-27. Liu Xin, Cui Xiang, Liang Guishu, et al. Wide-band modeling method based on the fractional order differential theory[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 20-27. [2] 焦重庆, 李明洋, 崔翔. 特高压气体绝缘开关设备套管的宽频等效电路建模[J]. 电工技术学报, 2016, 31(20): 64-72.Jiao Chongqing, Li Mingyang, Cui Xiang. Broadband equivalent circuit model of bushing for gas insulated switchgear in ultra high voltage substation[J]. Transactions of China Electrotechnical Society, 2016, 31(20): 64-72. [3] Gustavsen B, Semlyen A.Rational approximation of frequency domain responses by vector fitting[J]. IEEE Transactions on Power Delivery, 1999, 14(3): 1052-1061. [4] Liu Yilu, Sebo S A, Caldecott R, et al.Modeling of converter transformers using frequency domain terminal impedance measurements[J]. IEEE Transactions on Power Delivery, 1993, 8(1): 66-72. [5] Liu Chen, Qi Lei, Cui Xiang, et al.Wideband mechanism model and parameter extracting for high-power high-voltage high-frequency transformers[J]. IEEE Transactions on Power Electronics, 2016, 31(5): 3444-3455. [6] 陈恒林, 陈玮, 冯利民, 等. 基于阻抗测量的共模扼流圈高频建模[J]. 电工技术学报, 2007, 22(4): 8-12.Chen Henglin, Chen Wei, Feng Limin, et al. High frequency modeling for common mode chokes based on impedance measurement[J]. Transactions of China Electrotechnical Society, 2007, 22(4): 8-12. [7] 侯李祥, 卓放, 师洪涛, 等. 基于系统稳定性分析的微电网阻抗测量技术[J]. 电工技术学报, 2015, 30(22): 153-162.Hou Lixiang, Zhuo Fang, Shi Hongtao, et al. New techniques for measuring impedance characteristics of an islanded microgrid based on stability analysis[J]. Transactions of China Electrotechnical Society, 2015, 30(22): 153-162. [8] Caldecott R, Liu Yilu, Sebo S A, et al.Measurement of the frequency dependent impedance of major station equipment[J]. IEEE Transactions on Power Delivery, 1990, 5(1): 474-480. [9] 史祥蓉. 舰船设备电源端高频阻抗特性在线检测[J]. 电工技术学报, 2013, 28(12): 95-99.Shi Xiangrong. Online detection method of power port high frequency impedance characteristics on ship equipment[J]. Transactions of China Electrotechnical Society, 2013, 28(12): 95-99. [10] 方超. 高压直流换流阀模块宽频特性测量与建模方法研究[D]. 北京: 华北电力大学, 2013. [11] 张晓. 特高压直流换流站主设备宽频电磁暂态分析模型及应用[D]. 北京: 清华大学, 2015. [12] 马其燕, 崔翔, 任春阳, 等. 特高压电容式电压互感器阻抗测量及参数灵敏度分析[J]. 高电压技术, 2014, 40(6): 1828-1838.Ma Qiyan, Cui Xiang, Ren Chunyang, et al. Impedance measurement and parameter sensitivity analysis for ultra high voltage capacitor voltage transformer[J]. High Voltage Engineering, 2014, 40(6): 1828-1838. [13] Gustavsen B.Eliminating measurement cable effects from transformer admittance measurements[J]. IEEE Transactions on Power Delivery, 2016, 31(4): 1609-1617. [14] Torrents J M, Pallas-Areny R.Error analysis in two-terminal impedance measurements with residual correction[J]. IEEE Transactions on Instrumentation and Measurement, 2005, 54(5): 2113-2116. [15] Agilent 4294A precision impedance analyzer[R]. 7th ed.Agilent 4294A precision impedance analyzer[R]. 7th ed. Japan: Agilent Technologies, 2003. [16] Henry W O.Electromagnetic compatibility engineering[M]. Canada: John Wiley & Sons, Inc, 2009.
2018, Vol. 33 
