摘要
高压电流互感器在高压下校准时,由于一次绕组对地电位差和绕组层间电位差增大,引起容性漏电流和容性误差占比增大,进而导致精度下降。对其影响程度进行仿真分析有助于评估测量结果,优化器件结构,具有实际意义。通过等效变换电流互感器的T型等效电路,进而搭建考虑寄生参数的电流互感器电路仿真分析模型。通过仿真,分析互感器的性能,研究各分布电容对校准精度的影响,以确定其中的关键因素。
When high voltage current transformer is calibrated under high voltage,the capacitive leakage current increases and the proportion of capacitive error increases,which leads to the decrease of accuracy.Simulation analysis of its influence degree is helpful to evaluate the measurement results and optimize the device structure,which has practical significance.RLC parasitic parameters of current transformer are extracted by numerical calculation,and the T-type equivalent circuit of current transformer is equivalent transformed,and then the simulation analysis model of current transformer circuit considering parasitic parameters is built.Through simulation analysis,the performance of transformer is analyzed,and the influence of distributed capacitance on calibration accuracy is studied to determine the key factors.
作者
赵伟
王宇
李旺
沈杰
唐建蒙
ZHAO Wei;WANG Yu;LI Wang;SHEN Jie;TANG Jianmeng(National Institute of Metrology,Beijing 100029,China;Beijing Internet Based Engineering Application Co.,Ltd.,Beijing 100083,China;Beijing Internet Based Engineering Co.,Ltd.,Beijing 100083,China)
出处
《通信电源技术》
2021年第5期10-12,共3页
Telecom Power Technology
基金
科技部课题“国家质量基础的共性技术研究与应用”(2017YFF0205701)。
关键词
分布电容
高压
电流互感器
distributed capacitance
high pressure
current transformer
