Abstract：The integration of new energy sources through grid-connected inverters (GCI) is changing the dynamic characteristics of modern power systems. Electromechanical transient stability analyses for systems dominated by synchronous generators are no longer comprehensive since they do not take the electromagnetic transients into account. This paper presents an overview of electromagnetic transient synchronous stability issues of GCI during fault ride-throughs of new energy generation units caused by large disturbances in which the GCI loses synchronization with the main system which causes the corresponding generator to go offline. This paper describes the GCI current source and voltage source control and the synchronization mechanism compared with that of the synchronous generator. This paper then introduces the key factors characterizing the power electronics and simplifications that give fast accurate results. Then, this paper introduces the typical modeling-analysis process and stability improvement strategies. Finally, further research challenges are identified to improve the power system stability.
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