摘要
针对脉冲性负载的需求功率下母线电压大幅波动的问题,在超级电容-蓄电池混合储能拓扑结构下提出了虚拟直流发电机的混合储能控制方法。该方法通过在传统的下垂控制基础上添加虚拟直流发电机控制环节,实现了由混合储能系统输出惯性功率来支撑直流母线上的功率变化。在带脉冲型负载运行的条件下开展仿真实验,结果表明:采用虚拟直流发电机的混合储能控制方法有效平抑了脉冲型功率波动造成的直流母线电压大幅波动,并保有下垂特性让不同类型的储能元件能够按照下垂系数来响应直流母线上的波动功率,在添加新的储能元件后仍能很好抑制脉冲型负载引起的母线电压波动,同时具备良好的可扩展性,使得混合储能系统的拓扑结构更加灵活,更适合直流微电网的分布式结构。
Aiming at the problem of the large fluctuation of the bus voltage under the demand power of the pulsed load,a hybrid energy storage control method of the virtual DC generator was proposed under the supercapacitor-battery hybrid energy storage topology.By adding a virtual DC generator control link on the basis of traditional droop control,this method realizes that the hybrid energy storage system outputs inertial power to support the power change on the DC bus.The simulation experiment was carried out under the condition of pulse-type load operation,and the results showed that the hybrid energy storage control method using virtual DC generator effectively smoothed the large fluctuations in the DC bus voltage caused by pulse-type power fluctuations,and it also has droop characteristics so that different types of energy storage components can respond to the fluctuating power on the DC bus according to the droop coefficient,and after adding new energy storage components,it can still suppress the bus voltage fluctuations caused by pulse-type loads,and at the same time have good scalability,making the topology of the hybrid energy storage system more flexible and more suitable for the distributed structure of DC microgrids.
作者
杨海涛
邵天章
尹志勇
YANG Haitao;SHAO Tianzhang;YIN Zhiyong(Shijiazhuang Campus,Army Engineering University,Shijiazhuang 050003,China)
出处
《兵器装备工程学报》
CSCD
北大核心
2021年第7期203-209,共7页
Journal of Ordnance Equipment Engineering
