摘要
为克服光储直流微网(DC microgrid with photovoltaic and storage system,DMPSS)易受功率波动和负载扰动影响的问题,提出VDCM+PBC策略,即在储能接口变换器的控制中电流内环采用无源控制(passivity-based control,PBC)策略,电压外环引入虚拟直流电机(virtual DC machine,VDCM)控制策略。仿真结果表明:与外环为VDCM、内环为PI控制策略(VDCM+PI)相比,VDCM+PBC策略可减小负载以及光伏输出功率变化时的母线电压波动,可更好地提高直流母线电压的稳定性,从而验证了所提VDCM+PBC策略的可行性。
In order to overcome the susceptibility of DC microgrid with photovoltaic and storage system(DMPSS)to power fluctuations and load disturbances,a VDCM+PBC strategy was formed.That is,in the control of energy storage converter,a passivity-based control(PBC)was adopted in current-loop,and a virtual DC machine(VDCM)control strategy was introduced in voltage-loop.Simulation results show that,compared with the VDCM+PI strategy(i.e.,the voltage-loop is VDCM control and the current-loop is PI control),the VDCM+PBC strategy can reduce the bus voltage fluctuations when the load and photovoltaic output power changes.The improved stability of DC bus voltage verifies the feasibility of the proposed VDCM+PBC strategy.
作者
杨继鑫
王久和
王勉
王振业
YANG Jixin;WANG Jiuhe;WANG Mian;WANG Zhenye(School of Automation,Beijing Information Science&Technology University,Haidian District,Beijing 100192,China;School of Electrical Engineering,Beijing Jiaotong University,Haidian District,Beijing 100044,China)
出处
《发电技术》
2021年第5期576-584,共9页
Power Generation Technology
基金
国家自然科学基金项目(51777012)
北京市自然科学基金-教委联合资助项目(KZ201911232045)。
关键词
光储直流微网(DMPSS)
无源控制
虚拟直流电机控制(VDCM)
母线电压波动
DC microgrid with photovoltaic and storage system(DMPSS)
passivity-based control
virtual DC machine control(VDCM)
fluctuation of DC bus voltage
