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Reliability and Cost based Redundancy Design for Modular Multilevel Converter
Open accessAbstract
The modular multilevel converter (MMC) is very attractive in a high-voltage dc (HVdc) transmission system due to its high modularity and scalability. It is also a promising candidate for medium-voltage applications. An MMC has many power devices that lead to a relatively low reliability based only on a direct failure rate calculation. The reliability of an MMC can be improved by redundant designs. Lots of redundant designs and strategies have been proposed in recent years, while their reliability improvements are hardly quantified in existing literature. In practice, reliability improvement with constraint costs is a challenge. In view of these, this paper proposes a reliability and cost assessment scheme for MMC redundant designs and strategies. Reliability and cost are quantified for comparison purposes. A medium-voltage application is used to demonstrate the reliability and cost assessment scheme. The reliability analysis is based on a combinatorial model and the Poisson process model. The cost analysis focuses on capital cost and power loss cost. The proposed reliability and cost analysis scheme provides a guideline for MMC redundant design and redundant strategy selection.
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“There is a trade-off between submodule redundancy and cost, which should be evaluated for each project to define redundancy design and operation strategy [139].”
From Modular Multilevel Converters: Recent Achievements and Challenges (2021) · cites this paper as [139]
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HVDC Transmission: Technology Review, Market Trends and Future Outlook
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Metadata
- Authors
- Tu, P., Yang, S., & Wang, P.
- Affiliations
- Nanyang Technological University (SG)
- Venue
- IEEE Transactions on Industrial Electronics
- Published
- 2018
- Pages
- 1-1
- ISSN
- 0278-0046 (ISSN-L)
- 1557-9948
- OpenAlex
- W2784130885
- Cited by
- 199
- References
- 39
- Citations by year
- 2026: 7 · 2025: 12 · 2024: 25 · 2023: 23 · 2022: 29 · 2021: 32 · 2020: 40 · 2019: 25 · 2018: 6
- FWCI
- 9.86
- Type
- journal article
- Language
- en
- Open access
- green
- hdl.handle.net
- Licence
- Locations
- IEEE Transactions on Industrial Electronics (publishedVersion)
- DR-NTU (Nanyang Technological University) (submittedVersion)
- Funders
- National Research Foundation
- National Research Foundation Singapore
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › HVDC Systems and Fault Protection
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Multilevel Inverters and Converters
- Physical Sciences › Engineering › Safety, Risk, Reliability and Quality › Reliability and Maintenance Optimization
- Keywords
- modular multilevel converter, redundancy design, reliability analysis, cost analysis, Poisson process model, capital costs, power loss cost, medium voltage applications, HVDC transmission
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