The Use of Averaged-Value Model of Modular Multilevel Converter in DC Grid
- 15 July 2014
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Delivery
- Vol. 30 (2), 519-528
- https://doi.org/10.1109/tpwrd.2014.2332557
Abstract
This paper investigates the applicability of averaged-value models (AVMs) for modular multilevel converters (MMCs) operating in a voltage-sourced converter-based-high-voltage dc (VSC-HVDC) grid. The AVM models are benchmarked by comparison with a detailed electromagnetic transient model of the grid, including a fully detailed MMC model. Analysis results show that the AVM is only effective as long as the capacitors are large enough to maintain nearly constant voltage across each MMC submodule. This paper also shows that previously developed MMC averaged models are not able to accurately simulate the transients under dc fault conditions. This paper introduces topology changes to a previously proposed averaged model that results in much improved simulation for such conditions. This paper also shows that the model can be used effectively to study HVDC grids with significant time savings.Keywords
Funding Information
- Chinese Scholarship Council (CSC)
- National Natural Science Foundation of China (51177042)
- National High Technology Research and Development Program of China (863 Program) (2013AA050105)
- Natural Sciences and Engineering Research Council of Canada
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