摘要
分析了在Rogowski线圈测量脉冲电流及电网短路电流时电路参数和线圈结构对测量准确度的影响,结果表明:用I1m=nim算式计算脉冲电流幅值I1m时将产生一定误差;利用简化方程确定短路电流大小时同样会产生误差;若线圈均匀缠绕于骨架,其输出信号不受一次电流导体位置和导体倾斜度的影响。修订了脉冲电流及电力系统短路电流的表达式,并以线圈结构变化为例进行了测量误差估计。
Rogowski coil is commonly used to measure pulsed current and short circuit current. Its performance must be carefully studied for better accuracy. The error is produced if the amplitude of the pulsed current I1m is determined by the equation I1m =nim. Similarly, the error produced by simplified equation is analyzed. Some other problems are also studied, such as the influence of the position and obliquity of primary current. It is concluded that if the coil is symmetrically wound on the framework of Rogowski coil, the output of Rogowski coil is independent of the position and obliquity of primary current. As an example, the error is estimated when the structure of coil changes.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2003年第1期6-7,27,共3页
High Voltage Engineering
