摘要
提出了一种用于小电流测量的印制电路板(PCB)平面型Rogowski线圈电流互感器,给出了其结构和工作原理,推导出了线圈互感系数的计算公式,并分析了其抗外磁场干扰的机理,设计了实验模型。测试结果显示:额定100A的小电流测量准确度达到了0.2级,具有较强的抗电磁干扰能力和抗直流能力,适合作为电子式电能表和继电保护专用电流变换器,也可用于抗直流领域的小电流测量。这对于开发新型电流互感器具有积极的意义。
This paper presents a planar Rogowski coil current transformer based on PCB for low current measurement. Its structure and working principle are given. Formula for calculating the coil＇ s coefficient of mutual inductance is derived. Antiinterference mechanism of external magnetic field is analyzed. Experimental model is designed, and the test results show that the transformer model of rated 100 A has an accuracy of 0. 2 for low current measurement, strong anti-electromagnetic interference ability and anti-DC interference ability. It is suitable for a special current converter of electronic power meter and relay protection, and can also be used for low current measurement in areas of anti-DC. So it has a positive significance for the development of new current transformer. This work is granted Practical New Type Patent （No. 200620052659.2） and Invention Patent （No. 200610032482.4）.
出处
《电力系统自动化》
EI
CSCD
北大核心
2008年第22期79-82,共4页
Automation of Electric Power Systems
