Averaged model of modular multilevel converter in rotating DQ frame.

Nampally, Ashok; Sinha, Yashwant

Abstract

This paper proposes an average model of Modular Multilevel Converter (MMC) in rotating DQ frame. The proposed MMC model has a modular structure and can be linked with other power elements such as AC and DC subsystems. Modelling in DQ frame has numerous advantages over traditional ABC frame in terms of simulation speed and convenience for linearization. The main challenge of developing DQ model of MMC is to deal with the multiplication terms of dynamic equations of MMC. To overcome this complexity, a generic form is first introduced for each product variable mathematical equations of the average MMC model in ABC frame and then the multiplication results are transferred to DQ frame after ignoring the higher harmonics. The detailed model and the proposed DQ average model are implemented in PSCAD/EMTDC. The simulation results of the two models show very good matching which in turn confirms the accuracy of the proposed model. Also, the DQ average model is considerably faster than the detailed and even ABC average models.

Citation

NAMPALLY, A. and SINHA, Y. 2016. Averaged model of modular multilevel converter in rotating DQ frame. In Proceedings of the 5th Institute of Electrical and Electronics Engineers (IEEE) International conference on renewable energy research and applications (ICRERA 2016), 20-23 November 2016, Birmingham, UK. Piscataway: IEEE [online], pages 319-324. Available from: https://doi.org/10.1109/ICRERA.2016.7884559

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 5th Institute of Electrical and Electronics Engineers (IEEE) International conference on renewable energy research and applications (ICRERA 2016)
• Start Date: Nov 20, 2016
• End Date: Nov 23, 2016
• Acceptance Date: Oct 1, 2016
• Online Publication Date: Nov 20, 2016
• Publication Date: Mar 23, 2017
• Deposit Date: Apr 24, 2017
• Publicly Available Date: Apr 24, 2017
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• Peer Reviewed: Peer Reviewed
• Pages: 319-324
• DOI: https://doi.org/10.1109/ICRERA.2016.7884559
• Keywords: Modular multilevel converter; Modelling; Averaged model; DQ frame
• Public URL: http://hdl.handle.net/10059/2283
• Contract Date: Apr 24, 2017