|
|
|
| Core Loss Measurement of the Ferromagnetic Components Using Low-Frequency Method Frequency Power Supply |
| Liu Xin1, Yao Chenguo1, Liang Shibin2, Wang Junkai1, Liu Tao3 |
1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China;
2.Yunnan Electric Power Test & Research Institute (Group) Co.Ltd Kunming 650051 China;
3.Yunnan Electric Power Technology Company Kunming 650051 China |
|
|
|
|
Abstract Transformers will have measured no-load excitation characteristics, no-load loss and load loss for factory tests. Generally, a large capacity of industrial-frequency (IF) power supply is needed to measure the no-load loss which mainly consists of core loss. In order to reduce the capacity of testing power supply and make the test equipment portable, a low-frequency power supply rather than IF power supply which was used for core loss measurement of ferromagnetic components, was demonstrated in this paper. By applying several low frequencies voltages, the cure of E/f-PFe(electromotive force/frequency-core loss) via calculating core loss under low-frequency can be first obtained. Core loss under low-frequency of different frequency at constant value of E/f were then calculated through spline interpolation method. Lastly, the converted core loss under IF was determined based on least square method. In addition, experiments were conducted on the current transformer (CT) and single phase power transformer, comparing conversion results which using 15,20,25 Hz with directly measured results under IF, the relative error ε is below 5% and standard deviation of relative error σε is less than 0.9, respectively. These results show that this method possesses high conversion accuracy and stability and reduces the capacity of testing power supply obviously.
|
|
Received: 06 April 2016
Published: 20 June 2017
|
|
|
|
|
|
[1] GB1094.1—2013,电力变压器 第一部分: 总则[S].2013.
[2] JB/T 501—2006,电力变压器试验验导则[S]. 2006.
[3] 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 compensation calculation method for measuring ferromagnetic component volt-ampere characteristic using low frequency and frequency conversion power[J]. Proceedings of the CSEE, 2010, 30(3): 125-129.
[4] 张艳丽, 刘洋, 谢德馨, 等. 一种考虑硅钢片旋转损耗的三相变压器铁心损耗简化计算方法[J]. 中国电机工程学报, 2013, 33(18): 126-131.
Zhang Yanli, Liu Yang, Xie Dexin, et al. A simplified calculation method of core losses considering rotating losses of electrical steel sheets in three-phase transformers[J].Proceedings of the CSEE, 2013, 33(18): 126-131.
[5] 张艳丽, 彭志华, 谢德馨, 等. 直流偏磁下不同磁化曲线对变压器铁心损耗仿真的影响[J]. 电工技术学报, 2014, 29(5): 43-48.
Zhang Yanli, Peng Zhihua, Xie Dexin, et al. Effect of different magnetization curves on simulation for transformer core loss under DC bias[J]. Transactions of China Electrotechnical Society, 2014, 29(5): 43-48.
[6] 赵小军, 崔灿, 李琳, 等. 基于定点谐波平衡法的铁心磁滞与损耗特性分析[J]. 电工技术学报,2014, 24(5): 46-51.
Zhao Xiaojun, Cui Can, Li Lin, et al. Analysis of the hysteresis and loss characteristic in the laminated core by fixed-point harmonic-balanced method[J].Transactions of China Electrotechnical Society, 2014, 24(9): 46-51.
[7] 赵小军, 李琳, 程志光, 等. 定点谐波平衡有限元法与叠片铁心直流偏磁磁化特性研究[J]. 中国电机工程学报, 2011, 31(9): 126-132.
Zhao Xiaojun, Li Lin, Cheng Zhiguang, et al. Fixed point harmonic-balanced finite element method and DC-biasing magnetizing characteristic of laminated core[J]. Proceedings of the CSEE, 2011, 31(9): 126-132.
[8] 郭满生, 梅桂华, 张喜乐, 等. 直流偏磁条件下单相三柱电力变压器损耗计算[J]. 电工技术学报, 2010, 25(7): 67-71.
Guo Mansheng, Mei Guihua, Zhang Xile, et al.Calculation of losses in single phase three limb transformer under DC-biasing[J]. Transactions of China Electrotechnical Society, 2010, 25(7): 67-71.
[9] Mu Mingka, Li Qian, David J G, et al. New core loss measurement method for high-frequency magnetic materials[J].IEEE Transactions on Power Electronics , 2014, 29(8): 4374-4381.
[10] Tenyenhuis E G, Mechler G F, Girgis R S. Flux distribution and core loss calculation for single phase and five limb three phase transformer core designs[J]. IEEE Transactions on Power Delivery, 2000, 15(1): 204-209.
[11] Ibrahim M, Pillay P.Advanced testing and modeling of magnetic materials including a new method of core loss separation for electrical machines[J]. IEEE Transactions on Industry Applications, 2012, 48(5): 1507-1515.
[12] Hasan S, Taib S, Hardi S, et al. Core loss characteristics analysis of power transformer under different frequencies excitation[C]//7th International Power Engineering and Optimization Conference, Langkawi, 2013: 619-623.
[13] 何小庆, 刘淑萍, 李攀宏, 等. 一种消除单相变压器励磁涌流的预充磁策略[J]. 电力系统保护与控制, 2014, 42(17): 120-124.
He Xiaoqing, Liu Shuping, Li Panhong, et al. Eliminating the single-phase transformer inrush current based on pre-magnetizing[J]. Power System Protection and Control, 2014, 42(17): 120-124.
[14] 傅伟, 赵莉华, 梁勇, 等. 多台变压器空载合闸励磁涌流及其抑制方案的研究[J]. 电力系统保护与控制, 2015, 43(1): 28-33.
Fu Wei, Zhao Lihua, Liang Yong, et al. Study on no-load closing inrush current of transformer group and suppression measures[J]. Power System Protection and Control, 2015, 43(1): 28-33.
[15] 姚东晓, 邓茂军, 倪传坤, 等. 变压器多侧励磁涌流产生机理及对差动快速动作区影响研究[J]. 电力系统保护与控制, 2016, 44(5): 36-41.
Yao Dongxiao, Deng Maojun, Ni Chuankun, et al. Transformer's multi-side inrush current generation mechanism and its influence on the differential protection's fast action zone[J]. Power System Protection and Control, 2016, 44(5): 36-41.
[16] León F D, Farazmand A, Jazebi S, et al. Elimination of residual flux in transformers by the application of an alternating polarity DC voltage source[J]. IEEE Transactions on Power Delivery, 2015, 30(4): 1727-1734.
[17] 汤蕴璆.电机学[M]. 北京: 机械工业出版社, 2011.
[18] Steinmetz C P. On the law of hysteresis[J]. Proceedings of the IEEE, 1984, 72(2): 196-221.
[19] Bertotti G. General properties of power losses in soft ferromagnetic materials[J]. IEEE Transactions on Magnetics, 1988, 24(1): 621-630.
[20] 朱春波, 徐德鸿, 张龙龙, 等. 应用于电力电子技术的变压器和电感——理论、设计与应用[M]. 北京:机械工业出版社, 2014. |
|
|
|
2017, Vol. 32 
