The Response of Substation Bus Systems to Short Circuit Conditions, Part III: A Dynamic Design Analysis

For use in the design of substations, a dynamic analysis of bus structures reacting to the mechanical forces arising from short circuit currents has been developed and programmed for numerical solution on the IBM 360 computer. The analysis is based upon a well established, continuous method for describing the transverse vibration of slender beams having distributed mass and elasticity, the Euler- Bernoulli equation, and treats a member of the structural configurations commonly encountered in substations. Comparisons of predicted displacements with published values from tests on three, full scale structures are presented in this paper to illustrate the success of the analysis in predicting dynamic behavior.