A Fast Sorting Strategy Based on a Two-way Merge Sort for Balancing the Capacitor Voltages in Modular Multilevel Converters Article Swipe
Fangzhou Zhao
,
Guochun Xiao
,
Min Liu
,
Daoshu Yang
·
YOU?
·
· 2017
· Open Access
·
· DOI: https://doi.org/10.6113/jpe.2017.17.2.346
YOU?
·
· 2017
· Open Access
·
· DOI: https://doi.org/10.6113/jpe.2017.17.2.346
The Modular Multilevel Converter (MMC) is particularly attractive for medium and high power applications such as High-Voltage Direct Current (HVDC) systems. In order to reach a high voltage, the number of cascaded submodules (SMs) is generally very large. Thus, in the applications with hundreds or even thousands of SMs such as MMC-HVDCs, the sorting algorithm of the conventional voltage balancing strategy is extremely slow. This complicates the controller design and increases the hardware cost tremendously. This paper presents a Two-Way Merge Sort (TWMS) strategy based on the prediction of the capacitor voltages under ideal conditions. It also proposes an innovative Insertion Sort Correction for the TWMS (ISC-TWMS) to solve issues in practical engineering under non-ideal conditions. The proposed sorting methods are combined with the features of the MMC-HVDC control strategy, which significantly accelerates the sorting process and reduces the implementation efforts. In comparison with the commonly used quicksort algorithm, it saves at least two-thirds of the sorting execution time in one arm with 100 SMs, and saves more with a higher number of SMs. A 501-level MMC-HVDC simulation model in PSCAD/EMTDC has been built to verify the validity of the proposed strategies. The fast speed and high efficiency of the algorithms are demonstrated by experiments with a DSP controller (TMS320F28335).
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Concepts
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.6113/jpe.2017.17.2.346
- http://society.kisti.re.kr/sv/SV_svpsbs03V.do?method=download&cn1=JAKO201713059661591
- OA Status
- bronze
- Cited By
- 10
- References
- 22
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2613082274
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W2613082274Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.6113/jpe.2017.17.2.346Digital Object Identifier
- Title
-
A Fast Sorting Strategy Based on a Two-way Merge Sort for Balancing the Capacitor Voltages in Modular Multilevel ConvertersWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2017Year of publication
- Publication date
-
2017-03-20Full publication date if available
- Authors
-
Fangzhou Zhao, Guochun Xiao, Min Liu, Daoshu YangList of authors in order
- Landing page
-
https://doi.org/10.6113/jpe.2017.17.2.346Publisher landing page
- PDF URL
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https://society.kisti.re.kr/sv/SV_svpsbs03V.do?method=download&cn1=JAKO201713059661591Direct link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
bronzeOpen access status per OpenAlex
- OA URL
-
https://society.kisti.re.kr/sv/SV_svpsbs03V.do?method=download&cn1=JAKO201713059661591Direct OA link when available
- Concepts
-
Modular design, Converters, Merge (version control), sort, Sorting, Sorting algorithm, Capacitor, Computer science, Voltage, Electronic engineering, Merge sort, Electrical engineering, Parallel computing, Engineering, Algorithm, Operating system, Information retrievalTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
10Total citation count in OpenAlex
- Citations by year (recent)
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2025: 1, 2023: 2, 2022: 1, 2019: 4, 2018: 1Per-year citation counts (last 5 years)
- References (count)
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22Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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| corresponding_institution_ids | https://openalex.org/I891191580 |
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