新型PCB空心线圈电流互感器工频暂态性能研究

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

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。

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.