In this chapter, the transient synchronization stability of the islanded microgrid containing multiple grid-forming and grid-following converters is studied. The microgrid’s transient stability is strongly related to the hidden attractors and the stable equilibrium point’s basin of attraction. It is found that some specific hidden attractor may have a positive impact on the microgrid stability, in contrast to the typical results discussed in the previous chapter. Moreover, the aforementioned basin of attraction can be enlarged via the onset of homoclinic bifurcation. Such bifurcation behavior in high-order multi-converter systems is identified by using the saddle quantity and unstable manifolds.