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.
李猷民, 姜建平, 菅有为, 李小飞, 杨永鑫. 谐波对电磁式互感器测量的影响研究[J]. 电气技术, 2021, 22(2): 36-41.
LI Youmin, JIANG Jianping, JIAN Youwei, LI Xiaofei, YANG Yongxin. Research on the influence of harmonics on the measurement of electromagnetic transformers. Electrical Engineering, 2021, 22(2): 36-41.
2021, Vol. 22 
