分析了由并联型有源电力滤波器(parallel active power filter,PAPF)和并联电容器组成的混合补偿系统的系统稳定性。分析表明采用传统的PAPF控制方式时,当PAPF检测的负载电流中不包含并联电容器的电流时,混合补偿系统稳定,并且有理想的...分析了由并联型有源电力滤波器(parallel active power filter,PAPF)和并联电容器组成的混合补偿系统的系统稳定性。分析表明采用传统的PAPF控制方式时,当PAPF检测的负载电流中不包含并联电容器的电流时,混合补偿系统稳定,并且有理想的谐波补偿效果;当PAPF检测的负载电流中包含并联电容器的电流时,此时混合系统存在稳定性和谐波抑制效果之间的矛盾。实际系统中检测的负载电流中包含并联电容器电流的情况有时是不可避免的,针对这种情况提出一种同时检测负载电流和电源电压来控制PAPF输出电流的控制方案,该控制方案可以使系统变稳定,并且具有理想的谐波补偿效果。最后给出了仿真和实验验证结果。展开更多
The renewable energy sources(RESs)dominated power grid is an envisaged infrastructure of the future power system,where the commonly used grid following(GFL)control for grid-tied converters suffers from lacking grid su...The renewable energy sources(RESs)dominated power grid is an envisaged infrastructure of the future power system,where the commonly used grid following(GFL)control for grid-tied converters suffers from lacking grid support capability,low stability,etc.Recently,emerging grid forming(GFM)control methods have been proposed to improve the dynamic performance and stability of grid-tied converters.This paper reviews existing GFM control methods for the grid-tied converters and compares them in terms of control structure,grid support capability,fault current limiting,and stability.Considering the impact of fault current limiting strategies,a comprehensive transient stability analysis is provided.In addition,this paper explores the typical applications of GFM converters,such as AC microgrid and offshore wind farm high-voltage direct current(OWF-HVDC)integration systems.Finally,the challenges to the GFM converters in future applications are discussed.展开更多
文摘分析了由并联型有源电力滤波器(parallel active power filter,PAPF)和并联电容器组成的混合补偿系统的系统稳定性。分析表明采用传统的PAPF控制方式时,当PAPF检测的负载电流中不包含并联电容器的电流时,混合补偿系统稳定,并且有理想的谐波补偿效果;当PAPF检测的负载电流中包含并联电容器的电流时,此时混合系统存在稳定性和谐波抑制效果之间的矛盾。实际系统中检测的负载电流中包含并联电容器电流的情况有时是不可避免的,针对这种情况提出一种同时检测负载电流和电源电压来控制PAPF输出电流的控制方案,该控制方案可以使系统变稳定,并且具有理想的谐波补偿效果。最后给出了仿真和实验验证结果。
基金supported by the Xinjiang Autonomous Region Key R&D Projects(No.2020B02002)。
文摘The renewable energy sources(RESs)dominated power grid is an envisaged infrastructure of the future power system,where the commonly used grid following(GFL)control for grid-tied converters suffers from lacking grid support capability,low stability,etc.Recently,emerging grid forming(GFM)control methods have been proposed to improve the dynamic performance and stability of grid-tied converters.This paper reviews existing GFM control methods for the grid-tied converters and compares them in terms of control structure,grid support capability,fault current limiting,and stability.Considering the impact of fault current limiting strategies,a comprehensive transient stability analysis is provided.In addition,this paper explores the typical applications of GFM converters,such as AC microgrid and offshore wind farm high-voltage direct current(OWF-HVDC)integration systems.Finally,the challenges to the GFM converters in future applications are discussed.
