Selection of current transformers (CTs) must be done carefully to ensure protection, control, and measuring systems function correctly. Some of the conventional CTs on medium voltage (MV) switchgear in nuclear power plants (NPPs) perform poorly due to accuracy errors and saturation. This paper suggests the use of electronic current transformers (ECTs) as a solution. Simulations were done on a 13.8 kV switchgear using electromagnetic transient program restructured version (EMTP‐RV) software to compare the performance of conventional CTs and ECTs under high fault currents. It was found that ECTs show significant improvement in performance with the secondary current output of 97.37% and eliminate saturation even in systems with high symmetrical and asymmetrical short‐circuit currents. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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缓解核电站APR1400中压开关设备上的电流互感器饱和

必须仔细选择电流互感器（CT），以确保保护，控制和测量系统正常运行。核电厂（NPP）中的中压（MV）开关设备上的某些常规CT由于精度误差和饱和而性能较差。本文建议使用电子电流互感器（ECT）作为解决方案。使用电磁瞬态程序重组版本（EMTP-RV）软件在13.8 kV开关柜上进行了仿真，以比较传统CT和ECT在高故障电流下的性能。发现ECT的次级电流输出为97.37％，表现出显着的性能提高，甚至在具有高对称和非对称短路电流的系统中也消除了饱和。©2020日本电气工程师学会。