Electronic current transducers based on Rogowski coil are commonly used for power system protection. However, they may generate additional dynamic components in some cases that may cause misoperation of protection devices. In order to check the hidden danger of this undesired phenomenon, this article studies the transfer characteristics of Rogowski coil and proposes an approach to detect the possible occurrence of the additional dynamic component phenomenon. First, the root cause for the appearance of additional dynamic component is analyzed and investigated. Then, using the electromagnetic transient simulation modeling and variable delay scanning method, the simulation data of the grid operation are injected into the actual acquisition unit and the integral unit to obtain the output response of the current transducer. Therefore, the additional dynamic component phenomenon can be reproduced and identified. Finally, the test results of the application example demonstrate the effectiveness of the proposed method.

中文翻译：

---

基于罗氏线圈的电子电流互感器附加动态元件的研究及其测试方法

基于 Rogowski 线圈的电子电流传感器通常用于电力系统保护。但是，在某些情况下，它们可能会产生额外的动态分量，从而导致保护装置的误操作。为了排查这种不良现象的隐患，本文研究了罗氏线圈的传递特性，提出了一种检测可能发生的附加动态分量现象的方法。首先，分析和调查出现附加动态组件的根本原因。然后，利用电磁暂态仿真建模和可变延迟扫描方法，将电网运行的仿真数据注入实际采集单元和积分单元，得到电流互感器的输出响应。所以，可以再现和识别附加的动态分量现象。最后，应用实例的测试结果证明了所提出方法的有效性。