IEC TR 63401-3:20 23是一份技术报告，提供了对各种形式的快速频率响应和频率穿越技术的深入了解，这些技术涉及大容量电力系统中基于逆变器的发电源（主要是风能和光伏）。 本文首先侧重于从世界各地的不同参考文献中提取FFR的明确定义，同时研究FFR作用于系统频率的机制以及FFR的独特特征。然后比较了各种频率响应，并论证了同步惯性响应、快速频率响应和一次频率响应之间的关系。确定了FFR适合的几种系统需求和条件。本文件还重点介绍了各种非同步资源，并讨论了验证不同层次FFR能力的测试方法。最后，重点讨论了ROCOF问题和FFR的鲁棒性能。

IEC TR 63401-3:2023, which is a Technical Report, provides an insight into the various forms of fast frequency response and frequency ride-through techniques that involve inverter-based generation sources (mainly wind and PV) in a bulk electrical system.
This document first focuses on extracting the clear definition of FFR from different references around the world, while studying the mechanism of FFR acting on system frequency and the unique features of FFR. It then compares various kinds of frequency response and demonstrates the relationship among synchronous inertia response, fast frequency response, and primary frequency response. Several system needs and conditions where FFR is suitable are identified. This document also focuses on the performance objectives, practicality and capabilities of various non-synchronous resources, and discusses the test methods for verifying FFR capability at different levels. Finally, it focuses on the ROCOF issues and on the robust performances of FFR.