An analog electronics emulation solution is investigated in order to assess the state of a power system facing dynamic phenomena such as the transient stability. Two approaches are studied: DC emulation and AC emulation. Both are intended to be integrated on VLSI submicron CMOS silicon technologies. This implementation has the advantages of presenting low cost, fast simulation time that is independent of the network size and the number of the generators connected to it, low power consumption and small size. ©2007 IEEE.