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State-space switching model of modular multilevel converters

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8 Author(s)
Jun Wang ; Center for Power Electronics Systems, Virginia Polytechnic Institute and State University, Blacksburg, 24061, USA ; Ewan Farr ; Rolando Burgos ; Dushan Boroyevich
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This paper presents a comprehensive summary and detailed analysis on the modeling of modular multilevel converters for High Voltage Direct Current (HVDC) transmission, and develops a state-space switching model for the now well-known Modular Multilevel Converter (MMC), and also for the more recently developed Alternate Arm Converter (AAC). Various models used for the MMC are firstly discussed, followed by the complete derivation procedure of the state-space switching models of both MMC and AAC. The modeling approach used is based on the premise that only state variable transformations and simple voltage and current equations could be formulated, allowing it to capture all circuital information. The only assumption in the derivation is the ideal nature of the switching devices. The paper presents as well an in-depth analysis of the models developed, comparing the MMC and AAC at their most fundamental level of operation.

Published in:

Control and Modeling for Power Electronics (COMPEL), 2013 IEEE 14th Workshop on

Date of Conference:

23-26 June 2013