电网特性对光伏电站并网的影响

针对光伏电站并网问题，分析了并网接入点的系统电压变化因素，通过建立光伏电站并网的戴维南等效电路及进一步推导，得出了系统短路容量与光伏电站极限规划设计容量及并网点电压之间的简明关系。分析结果表明：可以利用光伏电站待接入的并网点系统短路容量这一电网特性简单估算待并入光伏电站的极限设计容量大小及并网点电压的变化大小，为今后更好地规划设计光伏电站及电力系统的安全稳定运行提供参考。

The influence of power system characteristic on photovoltaic power station grid-connected power generation

Aiming at the problem of photovohaic power station grid-connected power generation, analyzes the influencing factors of system voltage on grid access point of photovoltaic power station, based on the Thevenin＇ s theorem, educes the relationship between the system short circuit capacity with the extreme programming design capacity and voltage of grid access point. The analysis result shows that using the relationship, can simple estimating the limiting capacity of stay online photovolta- ic power station and voltage change of the grid access point, provide reference for programming of pho- tovoltaic power station and stable running of power system.