A GENERALIZED HARMONIC-BALANCE METHOD FOR EMTP INITIALIZATION

The harmonic balance method is extended to the steady-state analysis of power system models that include complex nonlinearities and variable topology power electronics equipment as may be user-assembled from basic EMTP-TACS components. In applying the harmonic balance method, these devices are considered as black boxes and isolated from the linear part of the model. A shooting method is used to accelerate the computation of their intermediate time-domain steady-state responses and to solve the harmonic balance equation formulated as a fixed point problem. Numerical tests show that the resulting generalized harmonic balance method is very promising for lightly damped dynamic power system models.