Title :
Accelerated Model of Modular Multilevel Converters in PSCAD/EMTDC
Author :
Xu, Jianzhong ; Zhao, Chengyong ; Liu, Wenjing ; Guo, Chunyi
Author_Institution :
State Key Lab. of Alternate Electr. Power Syst. with Renewable Energy Sources, North China Electr. Power Univ., Beijing, China
Abstract :
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.
Keywords :
power convertors; power system CAD; PSCAD/EMTDC; electromagnetic transient simulations; equivalent accelerated model; high level Kirchhoff´s Law; high-voltage direct-current transmission; large-scale admittance matrix; modular multilevel converters; nodal analysis method; small-scale matrices; voltage-sourced converter; Acceleration; Capacitors; EMTDC; Mathematical model; Modulation; PSCAD; Voltage control; Accelerated model; PSCAD/EMTDC; high voltage direct current (HVDC); modular multilevel converter (MMC); nodal analysis method; voltage-source converter (VSC);
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2012.2201511
