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Study on Transient Saturation Characteristic of Current Transformer

机译：电流变压器瞬态饱和特性的研究

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Current transformer (CT) is an important measuring equipment to transfer the current signal from the primary side of the system to the secondary side. Most relay protection depends on the current signal transferred by CT. However, CT is prone to transient saturation due to the influence of the aperiodic component of the fault current. This paper deeply analyzes the transient saturation characteristic of CT from the perspectives of equivalent circuit calculation and saturation mechanism and verifies the influence of aperiodic component on the saturation characteristic of CT through PSCAD/EMTDC software simulation. The measures to reduce the influence of transient saturation of current transformer on relay protection are introduced. It is of great significance to improve the performance of relay protection and the stability of electrical power system.
机译：电流互感器（CT）是一种重要的测量设备，用于将电流信号从系统的初级侧传递到次级侧。大多数继电器保护取决于CT传输的电流信号。然而，由于故障电流的非周期性组分的影响，CT容易出现瞬态饱和。本文从等效电路计算和饱和机制的角度深入分析了CT的瞬态饱和度特性，并验证了非周期性组分对CT通过PSCAD / EMTDC软件仿真的饱和特性的影响。介绍了降低电流校准对继电保护瞬态饱和度的措施。提高继电器保护和电力系统稳定性的性能具有重要意义。

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