Dear all, I want run AC power flow, considering multiple generators with possibility of Islanding using MATPOWER 4.1. In addition to the grid supply I have five generators of equal output capacity at particular bus location. I defined this bus location as slack bus. This means I have two slack buses (including the grid supply). When I run MATPOWER AC power flow, with the grid connected, one of the generators (the first generator of the five connected) is taking care of system losses, showing that the chosen generator has unlimited capacity and is also absorbing negative active power. I am assuming a distributed generator (which could be synchronous generator, fuel cell etc) is this physically feasible? I had expected the grid supply been the first slack bus to take care of the system losses and provide other support for the network. I would be glad if someone could advice on how to go about it.
Idris Musa
