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Improved ADC model of voltage-source converters in DC grids

Mu, Qing, Liang, Jun, Zhou, Xiaoxin, Li, Yalou and Zhang, Xing 2014. Improved ADC model of voltage-source converters in DC grids. IEEE Transactions on Power Electronics 29 (11) , pp. 5738-5748. 10.1109/TPEL.2014.2301197

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Due to a large number of converters in dc grids, the simulation speed using traditional electromagnetic simulation tools becomes very slow. An associated discrete circuit (ADC) switch model can improve the simulation efficiency greatly by avoiding the modification of system matrix during switching. However, existing ADC switches induce virtual power losses due to simulation errors during switching transients. The mechanism of the virtual power loss is analyzed, and a power loss model is established. An improved ADC switch model is designed by adding compensation sources to mitigate the simulation errors. Theoretical analyses are carried out to prove this improvement. A fast algorithm to obtain the initial values of the compensation sources is proposed by utilizing the complementary operation of IGBTs. The improved ADC switch provides fast simulation speed and high accuracy. The modeling is particularly suitable for investigating long term system dynamics of dc grids with multiple converters and fast converter transients at the same time.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 0885-8993
Funders: CEPRI
Date of First Compliant Deposit: 30 March 2016
Last Modified: 21 Apr 2020 15:27

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