| Abstract |
The simulation of current source modular multilevel converter (CSMMC) based systems with large numberof submodules require significant computational efforts. In this paper, a simplified model of CSMMCis developed to reduce the computational complexity while maintaining the accuracy of the traditionaldetailed model. The model is constituted using controlled current sources in each arm of the converter.The controlled output of the current source is determined, considering the variation in the total submoduleinductor currents and the switching due to modulation. Since the dynamics of the submoduleinductors are reproduced in the arm level model of the converter, the arm currents of the proposed modelprovide the accurate representations of the actual converter waveforms. The accuracy of the proposedmodel is validated for the different simulation studies on CSMMC based STATCOM test system with thetraditional and the proposed method in PSCAD/EMTDC. The computing performance of the proposedmodel is also compared with the traditional detailed model and the results show that the simulation speedwith the proposed model increases drastically. |
