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Abstract: Global demand for power has significantly increased, but power generation and transmission capacities have not increased proportionally with this demand. As a result, power consumers suffer from various problems, such as voltage and frequency instability and power quality issues. To overcome these problems, the capacity for available power transfer of a transmission network should be enhanced. Researchers worldwide have addressed this issue by using flexible AC transmission system (FACTS) devices. We have conducted a comprehensive review of how FACTS controllers are used to enhance the available transfer capability (ATC) and power transfer capability (PTC) of power system networks. This review includes a discussion of the classification of different FACTS devices according to different factors. The popularity and applications of these devices are discussed together with relevant statistics. The operating principles of six major FACTS devices and their application in increasing ATC and PTC are also presented. Finally, we evaluate the performance of FACTS devices in ATC and PTC improvement with respect to different control algorithms.

Good representation on the overview of FACTS devices and their classification.

综述：利用柔性交流输电系统（FACTS）装置增强电力传输能力

概要：全世界对电能的需求显著增长，但电能生产和传输能力却未相应提升。这导致电能消费者受多种问题困扰（如：电压和频率不稳定及电能质量问题）。为解决上述问题，需提升电力传输网的可用功率传输能力。世界各地的研究者采用柔性交流传输系统（FACTS）装置来提升这一能力。本文全面总结了FACTS控制器如何用于提升电力系统网的可用传输能力（ATC）和功率传输能力（PTC）；针对不同因素，讨论不同FACTS设备的分类；结合相关统计结果，讨论FACTS设备的普及性和应用情况。此外，本文还包含六种主要FACTS装置的操作原理及其在提升ATC和PTC方面的应用。最后针对不同的控制算法，评估FACTS装置在提升ATC和PTC方面的性能。

关键词：柔性交流输电系统（FACTS）装置；可用传输能力（ATC）；功率传输能力（PTC）；人工智能

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