Transient stability analyses of micro-grids with multiple distributed generations

This paper studies the transient stability of the micro-grid supplied by multiple distributed generations, which are interfaced by synchronous generator and inverters. The study is performed by DIgSILENT Power Factory 14.0 and the IEEE 37-node distribution system is used for simulations. The three-phase-to-ground short-circuit fault is applied when doing the following work. The transient behaviors of synchronous generator and inverter-based distributed generations that adopt Droop Control strategy are simulated and analyzed. The decisive aspects that affect the transient stability of them are both investigated. The transient stability of the micro-grid supplied by a combination of synchronous generator and inverter-based distributed generations that adopt PQ Control strategy is analyzed. The comparison work of another combination of synchronous generator and inverter-based distributed generations that adopt Droop Control strategy are also accomplished.