Abstract High penetration of grid-connected photovoltaic (PV) power, especially large PV power plants consisting of hundreds of units, has significant impacts on dynamic characteristics of power grids. It is increasingly important to develop a dynamic equivalent model for a large PV plant to simulate its responses under large disturbances, especially during the fault ride-through process, by using single or several equivalent PV units. To construct such a model for large PV plants, a four-step framework is proposed: clustering of PV units within a PV plant, aggregating of PV units within a cluster, allocating of the collector network and validating of the constructed equivalent model. Comprehensive reviews with solutions and comparisons on each of the four modeling steps are presented. Further, equivalent modeling challenges are summarized, and future research directions for advancing single- and multi-unit equivalent methods are recommended.

中文翻译：

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大型光伏电站动态等效建模综述

摘要 光伏并网发电的高渗透率，特别是由数百台机组组成的大型光伏电站，对电网的动态特性具有显着影响。为大型光伏电站开发动态等效模型以模拟其在大扰动下的响应变得越来越重要，尤其是在故障穿越过程中，通过使用单个或多个等效光伏单元。为了为大型光伏电站构建这样的模型，提出了一个四步框架：光伏电站内光伏机组的集群、集群内光伏机组的聚合、集热器网络的分配和构建的等效模型的验证。介绍了对四个建模步骤中每一个步骤的解决方案和比较的综合评论。此外，总结了等效的建模挑战，