大容量电力系统中基于逆变器的资源的动态特性第4部分:基于逆变器的资源对大电网故障的响应行为

[中文适用范围]： 本文档主要关注并网中大规模集成逆变器型资源（IBRs）时，IBR 的故障行为以及现有继电保护的性能。主要内容包括：现行电网导则中关于 IBR 故障电流的要求，包括对称和非对称故障期间正序和负序系统中的有功和无功电流要求；不同 IBR 拓扑和控制方案下 IBR 的故障电流行为，包括暂态和基波频率的电流分量；现有继电保护在大规模集成 IBR 时的适应性，包括距离保护、相位选择器、方向继电器和过电流保护的性能。 [外文原描述]： IEC TR 63401-4:2022 (E), which is a technical report, focuses on the fault behaviour of IBRs and performances of the existing relay protection in grids with large-scale integration of IBRs. This document includes: The IBR fault current requirements in present grid codes, including the requirements of active and reactive currents in positive- and negative-sequence systems during symmetrical and unsymmetrical faults. Fault current behaviour of IBRs, including the current components in transient and fundamental frequency in different IBR topology and control schemes. Adaptability of existing relay protection with the large-scale integration of IBRs, including the performances of distance protection, phase selector, directional relay and over-current protection.