|
|
|
| Research on the influence of harmonics on the measurement of electromagnetic transformers |
| LI Youmin1, JIANG Jianping1, JIAN Youwei1, LI Xiaofei1, YANG Yongxin2 |
1. State Grid Shandong Electric Power Maintenance Company, Ji'nan 250018;
2. School of Electrical Engineering, Shandong University, Ji'nan 250061 |
|
|
|
|
Abstract Transformers are the basis of distribution network control and protection. Under harmonic conditions, their measurement accuracy will directly affect the safe and stable operation of the power grid. In this paper, the main electromagnetic transformers in the current low-voltage distribution network-electromagnetic voltage transformers and electromagnetic current transformers-are modeled and analyzed. On the basis of their harmonic transfer characteristics, the influence of different frequency harmonic conditions on the measurement error of electromagnetic transformers is analyzed. The influence of the measurement error of the built-in transformer is verified by simulation in Matlab. The conclusions obtained provide a reference for the application of the electromagnetic transformer under harmonic conditions.
|
|
Received: 16 June 2020
|
|
|
|
| Cite this article: |
|
LI Youmin,JIANG Jianping,JIAN Youwei等. Research on the influence of harmonics on the measurement of electromagnetic transformers[J]. Electrical Engineering, 2021, 22(2): 36-41.
|
|
|
|
| URL: |
|
http://dqjs.cesmedia.cn/EN/Y2021/V22/I2/36
|
[1] 李涛, 陈劲松, 高宝发. 浅谈电磁式电压互感器误差特性隐性恶化的原因分析[C]//2012年8月建筑科技与管理学术交流会, 中国北京, 2012.
[2] 刘翔, 郭克勤, 叶国雄, 等. 电磁式电压互感器冲击电压响应特性试验研究[J]. 高电压技术, 2011, 37(10): 2385-2390.
[3] 梁志瑞, 董维, 刘文轩, 等. 电磁式电压互感器的铁磁谐振仿真研究[J]. 高压电器, 2012, 48(11): 18-23.
[4] 李玉超, 刘开培, 乐健, 等. 电磁式电压互感器频域测量误差分析[J]. 电测与仪表, 2016, 53(8): 50-56.
[5] 吴茂林, 崔翔. 电压互感器宽频特性的建模(英文)[J]. 中国电机工程学报, 2003, 23(10): 1-5.
[6] 杨金涛, 乐健, 汪妮, 等. 谐波背景下电能计量系统的计量误差分析[J]. 电力系统自动化, 2015, 39(13): 144-150.
[7] DOUGLASS D A. Current transformer accuracy with asymmetric and high frequency fault currents[J]. IEEE Power Engineering Review, 1981, PER-1(3): 41-42.
[8] LIU Jun, ZHOU Lijun, LUO Yang, et al.Dielectric frequency response of oil-paper composite insulation with transient moisture distribution[J]. IEEE Transa- ctions on Dielectrics and Electrical Insulation, 2013, 20(4): 1380-1387.
[9] 赵志英, 龚春英, 秦海鸿. 高频变压器分布电容的影响因素分析[J]. 中国电机工程学报, 2008, 28(9): 55-60.
[10] BIELA J, JOHANN W K.Using transformer parasitics for resonant converters-a review of the calculation of the stray capacitance of transformers[J]. IEEE Transa- ctions on Industry Applications, 2008, 44(1): 223-233. |
|
|
|
2021, Vol. 22 
