新型PCB空心线圈电流互感器工频暂态性能研究

本文研究了PCB空心线圈电流互感器输出对短路电流的非周期性分量的影响,发现其取决于积分器的上限截止频率ωT,并通过实验给出了具有优异工频暂态性能的PCB空心线圈电流互感器中T型积分器的最佳匹配时间常数。

The Study to the Transient Performance of New Type PCB Rogowski Coils Electronic Current Transformer

Nowadays using high quality PCB Rogowski coils electronic current transformer in the protection of power system is a trend along with the increase of capacity, heighten of voltages and automation of modern power system. So the optimization to its transient performance is becoming a problem that needs to be solved urgently. Through deep and logical analysis, this paper draws a conclusion that it lies on the upper limit cut-off frequency coT of the T-integrator that whether the PCB Rogowski coils electronic current transformer can reflect the non-periodical variable of the short-circuit current in the main circuit truly and clearly and then it also gives out the best-matching time-constants of T-integrator with perfect transient performance and its validity has been proved by experimentation.