基于微型燃气轮机的多微源直流微网主从协调控制

Master-slave coordinated control of multi-micro-source DC microgrid based on micro turbine

多微源直流微网系统母线电压稳定性是其电能质量的重要指标,也是限制其大规模应用的关键因素之一。针对直流微网母线电压波动较大的问题,提出一种以微型燃气轮机为主协调单元的主从协调控制策略。该控制策略充分利用微型燃气轮机的功率调节作用,在有效减小微网母线电压波动范围、使其输出电压更加稳定的同时,一定程度上减少了蓄电池单元投入数量和充放电次数,减少蓄电池的后期维护成本,并在Matlab/Simulink中分别搭建分级控制、变功率控制以及主从协调控制模型,通过对比仿真分析的方法,验证了文中所提控制策略在稳定电压及减少蓄电池充放电次数等方面存在的优势。

DC-bus voltage stability of multi-micro-source DC microgrid system is an important index of power quality and one of the key factors that confine large-scale application.Aiming to solving the large fluctuation of the bus voltage,a master-slave coordinating control strategy based on the micro turbine as the main coordination unit is proposed.This control strategy making full use of the power regulation function of micro turbine,effectively reduces the fluctuation range of micro grid bus voltage and makes the output voltage more stable.At the same time,it reduces the number of batteries and the number of charges and discharges,and reduces the later maintenance cost of batteries.In this paper,hierarchical control,variable power control and master-slave coordinated control models are built in Matlab/Simulink respectively.By comparing the simulation analysis methods,the advantages of the proposed control strategy in reducing the battery input cost,maintenance cost and stable voltage are verified.