POWERS(POWER Systems) is an electrical distribution network simulation code. Electrical networks are modeled by using the Finite Element Method for basic components such as resistors, inductors, and capacitors. All components are modeled as time-dependent elements. Components other than the basic components can be constructed with the basic component set to build hierarchical electrical components, such as breakers and generator-buses.

powers.gif (5264 bytes) The least-squares form of the Finite Element Method is used in the basic code, POWERS, which results in a symmetric local element formulation. This minimizes the amount of work that has to be performed for the implicit solution method that are used for enhanced simulation stability. The local element matrices for each component are a 2 X 2 structure and joined together to form a symmetric system matrix, for the electrical network, similar to using small building blocks to erect a large structure. All the degrees of freedom for the electrical system are obtained from the matrix inversion and back substitution.

POWERS has a high degree of accuracy and can be easily modified to model any electrical networks. The symmetric nature of the Finite Element Method and its basic building block character results in high system fidelity, fast execution time and the flexibility of interactive model building and testing.


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