Optimization of a Power Transient Stability Program on a Vector Supercomputer,Theory and Applications. (Final Report)

摘要

Detailed simulations of large interconnected power distribution systems currentlycannot be performed. Vector supercomputers have the capability to solve the great number of differential and non-linear simultaneous equations associated with the models, but programs have not been developed for them. This thesis investigates the optimization of a current power stability program installed on a Cray Y-MP vector supercomputer. Theory and models for power system stability are reviewed and an outline of the program is given. A discussion of vector supercomputer pipelining and the Cray Y-MP architecture are included. Programming constructs in FORTRAN which inhibit compiler optimization and vectorization are discussed, and program modification techniques to overcome these are presented. The modifications made to the power stability program are discussed and their effects on program execution time and output are presented. It is shown that significant speed up in program execution time can be achieved with no change in program output. (Author)(kr)