考虑PV-EVs不确定性的孤岛直流微电网控制策略研究  

Island DC Micro Grid Control Strategy Considering the Uncertainty of PV-EVs

作　　者：刘媛媛[1] 鲍安平[1] Liu Yuanyuan;Bao Anping(CQC New Energy Technology School,Nanjing Vocational College of Information Technology,Nanjing 210023,China)

机构地区：[1]南京信息职业技术学院中认新能源技术学院,南京210023

出　　处：《信息化研究》2019年第6期32-39,共8页INFORMATIZATION RESEARCH

摘　　要：微电网中包含光伏发电和电动汽车等不确定性的电源和负荷,如果不制定有效的控制策略,将影响微电网的稳定运行。文章针对光伏孤岛直流微电网,提出了一种以功率差为基准判定的分层分级协调控制策略,对各子系统分别通过改进最大功率点跟踪(MPPT)控制策略实现光伏出力最大化,通过功率分配策略对混合储能系统进行控制,通过改进粒子群算法有序调度电动车集群充放电,发挥其源荷特性,以分层分级实现对孤岛直流微电网中的光伏发电系统、混合储能系统和电动汽车集群的协调控制,降低PV出力和EVs充放电不确定性对微电网的影响,平抑微电网中的功率、负荷波动,稳定直流母线电压。通过在Matlab/Simulink系统中搭建仿真模型,验证策略有效。Micro grid contains uncertain power and load such as photovoltaic and electric vehicle.If no effective control strategy is formulated,the stable operation of micro grid will be affected.In this paper,a hierarchical and hierarchical coordinated control strategy based on the power difference is proposed for photovoltaic isolated DC micro grid.The photovoltaic output of each subsystem is maximized by improving the MPPT control rate,the hybrid energy storage system is controlled by the power distribution strategy,and the charging and discharging of the electric vehicle cluster is orderly scheduled by improving the particle swarm optimization algorithm to play its source load characteristics,The coordinated control of photovoltaic power generation system,hybrid energy storage system and electric vehicle cluster in the isolated DC micro grid is realized by hierarchical classification.The influence of PV output and EVs charging and discharging uncertainty on the micro grid is reduced,the power and load fluctuation in the micro grid is suppressed,and the DC bus voltage is stabilized.The simulation model is built in Matlab/Simulink system to verify the effectiveness of the strategy.

关 键 词：最大功率点跟踪 电动汽车 混合储能系统 功率差 

分 类 号：TP301.4[自动化与计算机技术—计算机系统结构]