Averaged-circuit modeling of line-commutated rectifiers for transient simulation programs

Dynamic average-value models (AVM) for line-commutated rectifier circuits are generally formulated in a state-space form and hence are straightforward to implement in state-variable-based simulation languages. In nodal-analysis-based languages, however, developing AVMs requires additional effort to reformulate the models and interface them with the external circuit networks. This paper proposes an averaged-circuit model for representing three-phase line-commutated rectifier in nodal-analysis-based simulation languages. The model derivation and its interface with the network are presented. The proposed model is verified against a detailed switch-level implementation of the system.