An efficient EMTP compatible algorithm for modelling switch-controlled drive circuits

The possibility of opposite interactions between the machine systems and the switching circuits of converters has created a need for both better models and more efficient computer programs to conduct detailed simulation studies involving machines and arbitrary drive systems with switching circuits included. This paper presents an efficient and fully Electromagnetic Transients Program (EMTP) compatible numerical algorithm that introduces the resistive representations and the cut-set algorithm into the system formulation stages, such that the possible numerical problems as might occur from using the EMTP can be avoided and the system equations needing to be solved can be minimized. Numerical verifications based on the proposed algorithm and the EMTP are provided for illustrations