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Accelerated Model of Modular Multilevel Converters in PSCAD/EMTDC

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4 Author(s)
Jianzhong Xu ; State Key Lab. of Alternate Electr. Power Syst. with Renewable Energy Sources, North China Electr. Power Univ., Beijing, China ; Chengyong Zhao ; Wenjing Liu ; Chunyi Guo

Modular multilevel converters (MMC) are an effective option for the continuously growing demands of voltage-sourced converter-based high-voltage direct-current (VSC-HVDC) transmission. However, accurate modeling of MMC with a high level in PSCAD/EMTDC is extremely time-consuming and requires hardware. Based on the Kirchhoff's Law, an equivalent accelerated model for MMC is proposed. The essence of the new model is the partition of one large-scale admittance matrix into substantial small-scale matrices, which is mathematically demonstrated with the nodal analysis method. Finally, the detailed electromagnetic transient simulations are implemented for the comparisons of steady state and transient performances, and the results validate the proposed model.

Published in:

Power Delivery, IEEE Transactions on  (Volume:28 ,  Issue: 1 )

Date of Publication:

Jan. 2013

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