微电网(群)宽频振荡分析和抑制研究进展与展望

Research Progress and Prospect of Wide-band Oscillations Analysis and Suppression for Microgrid(Clusters)

具有“自平衡、自调节、自控制”能力的微电网是新型电力系统的重要组成部分。然而,微电网中大量不同类型电力电子变流器接口的设备与电网络无源元件之间的动态耦合交互作用在不同带宽控制环节的作用下跨越多个时间尺度,容易诱发微电网发生宽频带振荡现象,威胁微电网乃至配电网的安全稳定运行。为此,该文对微电网(群)的宽频振荡问题及其分析与抑制的相关研究进行了系统性的梳理、综述与展望。首先,在梳理微电网(群)宽频振荡问题的特点与产生原因的基础上,提出了微电网(群)宽频振荡问题的分类方法;随后,基于宽频振荡问题分类以及抑制控制的不同方式,综述了国内外在微电网(群)宽频振荡分析与抑制领域的研究现状;最后,对相关领域的研究方向与思路进行了展望。

The microgrid with the ability of"self-balancing,self-regulating and self-controlling"is an important part of the new type power system.However,the dynamic interaction between a large number of different types of power electronic converter interfaced devices in the microgrid and the passive components in the power networks spans multiple time scales under the action of the control components with different bandwidths,which may easily induce the occurrence of wide-band oscillations in the microgrid.The wide-band oscillations threaten the safe and stable operation of the microgrid and even the distribution network.To this end,the wide-band oscillation problem of microgrid(clusters)and its related analysis and suppression researches are systematically reviewed,summarized and prospected in this paper.Firstly,on the basis of sorting out the characteristics and causes of the microgrid(clusters)wide-band oscillation problem,a classification method for the microgrid wide-band oscillation problem is proposed.Subsequently,based on the classification of wide-band oscillation problems and different types of suppression control,this paper summarizes the research status in the field of the wide-band oscillation analysis and suppression of microgrid(clusters)at home and abroad.Finally,the research directions and ideas for the related areas are prospected.