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

Volume

28

Issue

1

fYear

2013

fDate

Jan. 2013

Firstpage

129

Lastpage

136

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);

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2012.2201511

Filename

6290426