PROJECT TITLE :

Constant-Parameter Interfacing of Induction Machine Models Considering Main Flux Saturation in EMTP-Type Programs

ABSTRACT:

The state-of-the-art magnetically linear voltage-behind-reactance (VBR) and part-domain induction machine models for nodal-analysis-primarily based electromagnetic transients programs (EMTP-kind) provide an excellent combination of numerical stability, accuracy, and efficiency. However, incorporation of magnetic saturation in these models renders their interfacing circuits passionate about the operating segment of the piecewise-linear saturation characteristics. Consequently, refactorization of the network's conductance matrix is needed throughout simulations, that reduces the numerical efficiency of the general resolution and limits the models' range of application. This paper presents a new VBR squirrel-cage induction machine model that includes main flux saturation and possesses a saturation-independent constant-parameter interfacing circuit. Case studies in PSCAD/EMTDC demonstrate that the proposed model offers similar numerical stability and accuracy to the state-of-the-art models, whereas considerably increasing simulation speed for sensible multimachine systems.