大型光伏电站等值建模综述

Review on Equivalent Modeling of Large-scale Photovoltaic Power Plant

现阶段对大型光伏电站详细模型的研究较多,而对等值模型的研究较少。本文对光伏电站的稳态等值模型和暂态等值模型进行了概述。对于稳态等值,考虑节点处理方法与整体等值模型,其模型的建立有利于潮流计算和静态稳定性分析。对于暂态等值,单机等值基于容量加权或参数辨识进行处理,多机等值则考虑不同的分群指标和分群方法,其模型的建立有利于进行系统的大扰动仿真分析。然后对等值参数的计算和集电网络的等值作简要介绍。最后提出了需要进一步改进和研究的问题。

At present,there are more studies on the detailed models of large-scale photovoltaic(PV)power plants.However,the studieson the corresponding equivalent models are relatively fewer. In this paper,the steady-state and transient equivalent models of a PV power plant are summarized. In the steady-state equivalent model,the node processing method and the overall equivalent model are considered,and the establishment of its model facilitates the power flow calculation and static stability analysis. In the transient equivalent model,single-machine equivalence is processed based on capacity weighting orparameter identification,while multi-machine equivalence considers different grouping indexes and grouping methods. The establishment of its model is beneficial tothe large disturbance simulation analysis of the system. Afterwards,the calculation of equivalent parameters and the equivalence of collector network are briefly introduced. Finally,the problems that need further improvement and research are put forward.