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Development of z-transform electromagnetic transient analysis methods for multinode power networks

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3 Author(s)
Humpage, W.D. ; University of Western Australia, Department of Electrical & Electronic Engineering, Crawley, Australia ; Wong, K.P. ; Nguyen, T.T.

The paper continues and extends the recent development of z-transform electromagnetic transient analysis in power systems as reported in a companion paper. Whereas the original development was based on the configuration of a single transmission line and a simplified equivalent-source model, the present paper extends this to the more general case of multinode-power-transmission networks. In those terms, the formulation developed in the present paper provides for distributed-parameter transmission-line models with series-path nonlinear frequency dependence, together with lumped-parameter circuit elements of linear and nonlinear forms, in any arbitrary combination and interconnection. This general electromagnetic transient analysis formulation is complemented by means of representing any circuit-breaker switching sequence and any short-circuit fault constraint. An assessment of the inherent accuracy and stability of the multinode z-transform solution scheme derived is made from comparisons with solutions from formal frequency-domain analysis.

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Generation, Transmission and Distribution, IEE Proceedings C  (Volume:127 ,  Issue: 6 )