Applications of DC Power Flow Based Power System Dynamic Simulations

The increasing amount of power electronic devices and inertia-lacking generation have introduced more complexity in power system frequency stability analysis. For power system operations, quick analysis of system frequency response following contingencies is desired. Building upon the uniform frequency approximation, an approach commonly used in operator training simulators, this paper proposes a method of power system dynamic simulation using a uniform frequency approximation coupled with a dc power flow. This method is compared with the full frequency stability study using two case studies of different system sizes. In this paper, the computation time and performance of the two methods are compared, and the applications of the proposed method are also discussed.