With the continuous expansion of power grid capacity, the problem of short-circuit current exceeding the standard is becoming increasingly serious. Fault current limiter is a promising solution and is gradually becoming a research hotspot. In this study, fault current limiters are classified into four categories. And saturated-core fault current limiters are emphatically introduced, including its working principle and comparison with the other three categories. Saturated core fault current limiters are divided into four branches according to the ways leading the core saturated. A comprehensive review of the research activities and emerging technologies of saturated-core fault current limiters for AC power systems is presented in this study. The working principle and typical structure of DC-biased-, permanent-magnet-, superconducting- and hybrid-type saturated-core fault current limiters are introduced. The advantages and disadvantages of four types of saturated core fault current limiters are compared in detail from the aspects of current-limiting performance, iron core size and DC magnetomotive force. Real grid application examples of some types of devices are presented, as well as new progress in the techniques, are covered and discussed in detail. One may find the content of this study helpful as a detailed literature review or as practical technical guidance.

随着电网容量的不断扩大，短路电流超过标准的问题变得越来越严重。故障电流限制器是一个有前途的解决方案，并逐渐成为研究的热点。在这项研究中，故障电流限制器分为四类。着重介绍了饱和铁心故障限流器的工作原理，并与其他三类进行了比较。饱和磁芯故障电流限制器根据导致磁芯饱和的方式分为四个分支。本研究对交流电源系统的饱和铁心故障限流器的研究活动和新兴技术进行了全面综述。直流偏置永磁体的工作原理和典型结构 介绍了超导和混合型饱和铁心故障限流器。从限流性能，铁芯尺寸和直流磁通势等方面对四种饱和铁心故障限流器的优缺点进行了比较。介绍了某些类型设备的实际网格应用示例，并详细介绍了该技术的新进展。可能会发现本研究的内容可作为详细的文献综述或实用的技术指导有所帮助。介绍了某些类型设备的实际网格应用示例，并详细介绍了该技术的新进展。可能会发现本研究的内容可作为详细的文献综述或实用的技术指导有所帮助。本文介绍了某些类型设备的实际网格应用示例，并详细介绍了该技术的新进展。可能会发现本研究的内容对详细的文献综述或实用的技术指导很有帮助。