分布式光伏电源并网对电网电压影响的仿真建模

The Simulation Modeling of the Impact of Distributed Photovoltaic Power Grid Connection on Grid Voltage

摘要: 分布式光伏发电是光伏发电的重要发展方向，但光伏电源的输出特性使得其并网会对配电网的电压产生一定影响。本文从分布式光伏电源的原理和发展出发，介绍了光伏发电在未来能源利用方面的重要地位，简要叙述了光伏发电系统及发电原理，就光伏发电系统的分类、组成做出了归类，并对当前光伏发电系统研究热门的两大方向，即集中式并网光伏发电系统和分布式并网光伏发电系统的特点进行了说明。然后重点分析了光伏电源的等效模型，研究了光伏电源并网对配电网电压影响的仿真模型的建立，并搭建了基于通用的IEEE34节点配电网模型及其参数的Matlab/Simulink光伏并网仿真平台，为探究光伏电源并网对配电网电压影响规律建立了模型基础。

Abstract: Distributed photovoltaic power generation is an important developing direction of photovoltaic power generation. But the output characteristic of photovoltaic (pv) power has certain influence on the voltage of the distribution network. Firstly, this paper introduces the photovoltaic energy’s role in the future, and briefly introduces the principle of photovoltaic power generation system and power generation. Secondly, the centralized grid connection photovoltaic power generation system and distributed grid connection photovoltaic power generation system which are current research focuses of photovoltaic power generation system are discussed. Then the equivalent simulation model of photovoltaic power source is analyzed. Thirdly, the matlab simulation model is built based on the general IEEE 34 nodes distribution network model and parameters. Finally, this paper analyzes the influence on power grid voltage under the condition of different interconnected locations and various capacities of photovoltaic power.