Summary of research on stability of independent microgrid based on high permeability distributed generation

Abstract

The independent microgrid with high-permeability distributed generation is greatly constrained by the natural environment and economy, and lacks the support of large grid in operation. At the same time, the large-scale use of power electronic equipment such as converter will cause its stability problem to have new characteristics compared with the traditional grid, and therefore become the key of research. This paper summarizes the characteristics of microgrid stability, points out the problems existing in applying the traditional definition of power system stability to microgrid, and gives the definition and classification of the stability of the independent microgrid with high permeability DGS; reviews the analysis methods of microgrid stability from three aspects of signal stability, transient stability and voltage stability respectively; discusses the guarantee of microgrid stability The control method of signal stability and the technical measures to improve the transient stability of the microgrid are discussed. Finally, the key problems of the stability of the independent microgrid with high permeability distributed generation that need further study are summarized and prospected.

Power Management of AC/DC Hybrid Distribution Network With Multi-Port PET Considering Reliability of Power Supply System

“…At the same time, the research on structure design (Wang et al, 2015;Xiao, 2015), stability (Sanchez and Molinas, 2015;Pu et al, 2018;Wan et al, 2019), DC voltage control strategy (Dragicevic et al, 2014;Eghtedarpour and Farjah, 2014;Gao et al, 2017), and energy and power control strategy (Gao et al, 2017) has been widely carried out in the field of microgrid. AC/ DC technology can improve the utilization efficiency of new energy to a certain extent but hesitates to limit the access capacity of microgrid.…”