基于Rogowski线圈的电子式电流互感器的积分器技术

Technology in designing integrator of electronic current transducer based on Rogowski coil

积分器是基于Rogowski线圈的电子式电流互感器中的关键环节之一。分别论述了三种积分器的设计与实现,并对其性能进行了比较:用模拟电路实现的积分器不但在测量稳态电流上有很高的精度,还能较真实地反映故障电流的暂态过程,能稳定可靠地应用于测量、保护等实际工程领域。用数值算法实现的积分器由于其精度与算法实现问题,还需进一步研究与完善。采用集成芯片构成的数字积分器适用于计量系统,但在保护系统中使用具有一定的局限性。

Integrator is a key element in an electronic current transducer based on Rogowski coil. This paper designs three types of integrators and compares their performances. The integrator designed by analog circuit could measure steady AC current accurately, and also it has a good performance in describing the transient process of fault current. So it can be used in the engineering field credibly for measuring and protecting system. Digital integrator designed by numerical formula needs the further research because of its deficiency in accuracy and numerical formula, Another digital integrator designed by chips could be applied in the measuring system, but it is limited in protecting system.