电力自动化通信网和系统的第90-21部分：行波故障定位

[中文适用范围]： IEC TR 61850-90-21:2025 是一份技术报告，旨在提供背景信息、用例、数据模型和此类技术的应用指导。本文件将 1) 描述基于通信辅助行波的故障定位原理；2) 在以下应用场景下指定此方法的用例：a) 单端故障定位，b) 通过两个设备之间的通信进行双端故障定位，c) 与主站通信的双端故障定位，d) 广域故障定位应用，e) 脉冲雷达回波法，f) 变电站与其他故障定位和扰动记录功能的集成，g) 测试和校准；3) 描述每个用例的信息模型；4) 提供方案配置指导。 [外文原描述]： IEC TR 61850-90-21:2025, which is a Technical Report, aims to provide background information, use cases, data models and guidance on the application of such a technique. This document will 1) describe the principles of fault location based on travelling waves aided by communications; 2) specify use cases for this method under the following application scenarios: a) Single-ended fault location, b) Double-ended fault location through communications between two devices, c) Double-ended fault location with communications to a master station, d) Wide area fault location applications, e) Pulse radar echo method, f) Substation integration with other fault location and disturbance recording functions, g) Testing and calibration; 3) describe the information model for each use case; 4) give guidance on scheme configuration.