光伏并网系统的MATLAB快速仿真模型研究

以光伏发电系统的数学模型为基础,给出了其基于MATLAB/Simulink的仿真模型。针对传统仿真方法快速性、鲁棒性较差的缺陷,分析了两种基于逆变器的等效简化模型—等效开关模型与平均模型,并从仿真速度、精度及鲁棒性等方面对上述模型进行对比。此外,针对大规模光伏发电系统接入电网的情况,提出一种可用于快速仿真的相量模型,有助于电力系统的快速潮流计算与暂态特性分析,其有效性通过仿真对比得到了验证。最后,对四种仿真模型进行综合对比,提出了各种仿真方法的适用场合。

Development of fast simulation models of photovoltaic generation system based on MATLAB

A detailed simulation model of photovoltaic ( PV) generation system based on MATLAB/Simulink is estab-lished , which is based on its detailed mathematical presentation .Its inverter-based simplified models , i.e.the switc-hing-function equivalent model and average model , are proposed and simulated , overcoming the limits of traditional method in simulation speed and robustness .Quantitative comparisons are made between these methods from different aspects, including the simulation speed , accuracy as well as robustness to step-size.Besides, a novel phasor simula-tion model of the grid-connected PV generation system , which significantly improves the simulation speed and is suit-able for the fast analysis of power flow and electromagnetic transient behavior , is proposed .The validity and utility of the proposed phasor model are verified by comparing the steady-state performance with the detailed model .Finally , the applications of each method are proposed based on the aforementioned comparison of four kinds of simulation mod -els.