The multirate method for simulation of power system dynamics教程.pdf

1684 IEEE Transactions on Power Systems, Vol. 9. NO.3. August 1994 The Multirate Method for Simulation of Power System Dynamics M. L. Crow, Member James G. Chen Department of Electrical Engineering University of Missouri-Rolla Rolla, Missouri, 65401 Abstract One family of methods which has been used for In this paper, the multirate method will be introduced to Power system simulation are variablestep methods [l][2]. analyae power system behavior for systems with widely Variablestep methods are integration techniques in which varying time constants. Estimates for computational the timestep may vary in accordance with the fastest speed-up will be derived based on a linear system ap- varying state in the system. The variablestep method preach. The method will be applied to a small power sys- is well suited for simulating dynamic systems which are tem example and the results, both in terms of accuracy primarily slow response systems, but exhibit infrequent and computation time, will be compared to traditional fast decaying transients. The method is not well suited simulation methods. for systems in which the fast response is sustained for a large portion of the simulation interval. Unfortunately, this is the case when the power system contains induction 1 Introduction