微电网的建模仿真研究

摘要

研究微电网的建模仿真问题,针对微电网中的微电源种类多样且输出特性各异,由传统的简易微电源模型所构成的微电网平台很难对现今微电网的研究进行仿真.针对以上情况,构建了结构、功能完整的风电机组、燃料电池、带有MPPT(最大功率点跟踪)光伏电池以及柴油发电机等微电源模型,及具有调频作用的二次负载模型,仿真验证了所建模型的合理性及有效性.在此基础上,又构建了一个含多种能源负荷的微型电网模型,对负荷突变及严重故障的条件下微电网维持电能质量和快速恢复的能力予以评估,结果表明所构建的微电源模型和微电网模型能较好地仿真实际情况,为微电网的进一步研究提供了良好的仿真平台.%It is difficult for the micro-grid platform consisted of traditional simple micro-power models to simulate modem micro-grid simulation experiments,due to variety of micro-powers of micro-grid have different output power characters,when the issues of modeling and simulating of micro-grid are studied.Based on that,micro-powers,including wind turbine generator model,fuel cell model,photovoltaic cell with MPPT (maximum power point tracking) model and diesel generator model,as well as the secondary load equipped with the capacity of frequency modulation,were established,and simulations were carried to prove the models' rationality and validity.On this basis,a micro-grid with various energy sources and loads was built.By evaluating its capacity of maintaining power quality and quick recovery under load mutations and serious fault scenario,it shows that the constructed micro -powers and micro-grid model can simulate the practical situation well,and it provides better simulation platform for further study of micro-grid.