Electrical Engineering  2021, Vol. 22 Issue (2): 36-41    DOI:
Maintenance & Fault Diagnosis of Electrical Equipment Current Issue| Next Issue| Archive| Adv Search |
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

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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.
Key wordselectromagnetic transformer      harmonics      broadband modeling      measurement error      Matlab simulation     
Received: 16 June 2020     
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LI Youmin
JIANG Jianping
JIAN Youwei
LI Xiaofei
YANG Yongxin
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.
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https://dqjs.cesmedia.cn/EN/Y2021/V22/I2/36
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