With the rapid development of microgrid technology based on various distributed generators

the transient stability problem has now become one of the most important contents in researches of microgrid system. Both structure and control strategy of microgrid vary with different applications

so the transient stability of microgrid is very complex. In order to solve the problem

the effects on the transient stability of microgrid are summarized from four main aspects: the types of distributed generation

power electronic interface

the load and fault in microgrid

which affects the dynamic behavior of microgrid when subjecting to large disturbances

and the measures to improve its transient stability are summarized. Finally

key issues and prospects on microgrid transient stability to be solved are presented. This work is supported by National Natural Science Foundation of China (No. 51207048)

National High Technology Research and Development Program of China (863 Program) (No. 2014AA052601) and Foundation for the Author of National Excellent Doctoral Dissertation of China (FANEDD) (No. 201441).