摘要
文中对保护用超大电流互感器的屏蔽方法进行了对比分析,针对平衡绕组常用的两种连接方式——"反极性串"和"四段全并",先利用有限元数值计算软件ANSYS仿真计算出各绕组的电感和彼此间的互感,进而通过分析其线性电路模型,求解各绕组的电流及测量误差;通过比较两种屏蔽方案对杂散磁通的屏蔽效果和发热量,给出了优选建议。
The paper compares two shielding methods of protective heavy current transformer,when shielding coils are in reverse-polarity series connection and in parallel connection,and calculates the winding inductance and mutual inductance between each otherwith finite element software ANSYS,and analyses the linear circuit modelto obtain the current of coils and measurement error. Then,the paper compares the shielding effects and heat radiation,to make the judgment that which method is better.
出处
《电测与仪表》
北大核心
2016年第8期90-94,共5页
Electrical Measurement & Instrumentation
关键词
保护用电流互感器
屏蔽
测量误差
发热量
protective current transformer
shielding
measurement error
heat radiation
