Low-Frequency Measuring Method for Ferromagnetic Elements Excitation Characteristics
Wang Junkai1,2, Liang Shibin3, Liu Tao4, Yao Chenguo1, Liu Xin1
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China; 2. State Grid Tianfu Electric Power Supply Company Chengdu 610000 China; 3. Yunnan Power Test & Research Institute Kunming 650217 China; 4. Yunnan Power Test & Research Institute (Group) Co. Ltd Kunming 650217 China
Abstract：The current low-frequency measurement methods of ferromagnetic component excitation characteristics fail to consider the core loss. This paper analyzes the core loss principle under low frequency test, and concludes that the change of power frequency only affects the equivalent eddy current. Thus, the low-frequency test and conversion methods are proposed, which are suitable for measuring the excitation characteristics of ferromagnetic element in field test. The influence of core loss and leakage reactance is considered respectively. The low frequency voltage and current test data are both compensated. The test shows that the compensated data and the power frequency test results are basically the same. Compared with the frequency conversion method recommended by the regulation, the proposed method can reduce calculation error rate, where it reaches 5% during knee and saturated section.
王俊凯, 梁仕斌, 刘涛, 姚陈果, 刘鑫. 铁磁元件励磁特性低频测量方法[J]. 电工技术学报, 2017, 32(10): 168-173.
Wang Junkai, Liang Shibin, Liu Tao, Yao Chenguo, Liu Xin. Low-Frequency Measuring Method for Ferromagnetic Elements Excitation Characteristics. Transactions of China Electrotechnical Society, 2017, 32(10): 168-173.
[1] GB 20840.2—2014 互感器 第2部分: 电流互感器的补充技术要求[S]. 2014. [2] 梁仕斌, 王建新. 电流互感器励磁特性试验及其新方法[J]. 电力系统保护与控制, 2007, 35(增1): 398- 402. Liang Shibin, Wang Jianxin. The excitation special experimentation and new technique of current transformer[J]. Power System Protection and Control, 2007, 35(S1): 398-402. [3] 郑立群, 郑永寅. 用低频电源测量高安匝数电流互感器的伏安特性[J]. 高压电器, 2004, 40(5): 394- 395. Zheng Liqun, Zheng Yongyin. Measuring V - A characteristic of current transformer with high ampers-turns using low-frequency generator[J]. High Voltage Apparatus, 2004, 40(5): 394-395. [4] 林莉, 王军兵, 唐凤英, 等. 10kV电压互感器损坏的仿真计算研究[J]. 电力系统保护与控制, 2012, 40(17): 51-55. Lin Li, Wang Junbing, Tang Fengying, et al. Simu- lation and computational analysis on potential trans- former damage in 10kV system[J]. Power System Protection and Control, 2012, 40(17): 51-55. [5] GB/T 22071.1—2008 互感器试验导则: 第1部分 电流互感器[S]. 2008. [6] 何汉桥. 大功率低频测试电源研制应用[J]. 天津电力技术, 2002(3): 26-29. He Hanqiao. Development and application of high- power low-frequency test power[J]. Tianjin Electric Power Technology, 2002(3): 26-29. [7] 于梦瑶, 于群, 史建省, 等. 电流互感器饱和对低压电动机保护的影响及对策[J]. 电力系统保护与控制, 2014, 42(18): 78-82. Yu Mengyao, Yu Qun, Shi Jiansheng, et al. Influences and countermeasures for saturation of current trans- formers on low voltage motors protections[J]. Power System Protection and Control, 2014, 42(18): 78-82. [8] 梁仕斌, 文华, 赵涓, 等. 低频变频电源测量铁磁元件伏安特性的一种补偿计算方法[J]. 中国电机工程学报, 2010, 30(3): 125-129. Liang Shibin, Wen Hua, Zhao Juan, et al. A com- pensation calculation method for measuring ferro- magnetic component volt-ampere characteristic using low frequency and frequency conversion power[J]. Proceedings of the CSEE, 2010, 30(3): 125-129. [9] 张地生, 孔忻, 李晗, 等. 电流互感器伏安特性测试方法的研究[J]. 高压电器, 2012, 48(6): 80-84. Zhang Disheng, Kong Xin, Li Han, et al. Research of measuring method for V-A characteristic of current transformer[J]. High Voltage Apparatus, 2012, 48(6): 80-84 [10] 汤蕴璆. 电机学[M]. 北京: 机械工业出版社, 2011. [11] Tziouvaras D, Mclaren P. Mathematical models for current, voltage and coupling capacitor voltage trans- formers[J]. IEEE Transactions on Power Delivery, 2000, 15(1): 62-72. [12] Lueas J, Melaren P, Keerthipala W, et al. Improved simulation models for current and voltage trans- formers in relay studies[J]. IEEE Transactions on Power Delivery, 1992, 17(1): 152-159. [13] 张重远, 徐志钮, 律方成, 等. 电压互感器的高频无源电路模型[J]. 电工技术学报, 2012, 27(4): 77- 82. Zhang Zhongyuan, Xu Zhiniu, Lü Fangcheng, et al. High frequency passivity circuit model of potential transformers[J]. Transactions of China Electro- technical Society, 2012, 27(4): 77-82. [14] 胡启凡. 变压器试验技术[M]. 北京: 中国电力出版社, 2009. [15] 赵志宇, 罗隆福, 许加柱, 等. 基于Levenberg- Marquadt的非线性最小二乘新型换流变压器漏感矩阵识别法[J]. 电工技术学报, 2013, 28(4): 212- 220. Zhao Zhiyu, Luo Longfu, Xu Jiazhu, et al. Leakage inductances matrix identification of new converter transformer based on Levenberg-Marquadt nonlinear least squares algorithm[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 212-220. [16] 赵小军, 李琳, 程志光, 等. 基于直流偏磁实验的叠片铁心磁化特性分析[J]. 电工技术学报, 2011, 26(1): 7-13. Zhao Xiaojun, Li Lin, Cheng Zhiguang, et al. Analysis of magnetizing characteristic of laminated core based on the DC-biasing experiment[J]. Trans- actions of China Electrotechnical Society, 2011, 26(1): 7-13. [17] 陈林. 电力电子变换器中磁性元件磁芯损耗的研究[D]. 武汉: 华中科技大学, 2012. [18] 刘志存. 铁氧体材料的磁滞损耗特性[J]. 西北大学学报: 自然科学版, 2003, 33(4): 394-396. Liu Zhicun. Hysteresis loss characteristics of ferrite materials[J]. Journal of Northwest University (Natural Science Edition), 2003, 33(4): 394-396.
2017, Vol. 32 
