Design and analysis of a transformerless STATCOM based on hybrid cascaded multilevel converter

Pengfei Hu, Josep M. Guerrero, Zhengxu He

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Resumé

This paper presents a new concept of Static Synchronous COMpensator (STATCOM) based on a Hybrid Cascaded Multilevel Converter (HCMC). The HCMC consists of a two- level voltage converter and a wave-shaping circuit formed by cascaded H-bridge Sub-Modules (SM). Firstly, the operation principle and overall control strategy of HCMC are presented. After that, some key parameters including size of capacitors, numbers of sub-modules are in-depth analyzed. And then, a thorough comparison between the proposed HCMC-based STATCOM and conventional cascaded H-bridge based STATCOM is made, which turns out that the proposed HCMC-based STATCOM requires less number, size and stored energy of capacitors and has less power loss. Finally, a 35 kV/±50 Mvar HCMC-based STATCOM simulation model is constructed in PSCAD/EMTDC software platform. The simulation results validate the feasibility of the proposed HCMC-based STATCOM and the correctness of the analysis.
OriginalsprogEngelsk
TidsskriftInternational Journal of Electrical Power and Energy Systems
Vol/bind104
Sider (fra-til)694-704
Antal sider11
ISSN0142-0615
DOI
StatusUdgivet - jan. 2019

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Capacitors
Static synchronous compensators
Networks (circuits)
Electric potential

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    title = "Design and analysis of a transformerless STATCOM based on hybrid cascaded multilevel converter",
    abstract = "This paper presents a new concept of Static Synchronous COMpensator (STATCOM) based on a Hybrid Cascaded Multilevel Converter (HCMC). The HCMC consists of a two- level voltage converter and a wave-shaping circuit formed by cascaded H-bridge Sub-Modules (SM). Firstly, the operation principle and overall control strategy of HCMC are presented. After that, some key parameters including size of capacitors, numbers of sub-modules are in-depth analyzed. And then, a thorough comparison between the proposed HCMC-based STATCOM and conventional cascaded H-bridge based STATCOM is made, which turns out that the proposed HCMC-based STATCOM requires less number, size and stored energy of capacitors and has less power loss. Finally, a 35 kV/±50 Mvar HCMC-based STATCOM simulation model is constructed in PSCAD/EMTDC software platform. The simulation results validate the feasibility of the proposed HCMC-based STATCOM and the correctness of the analysis.",
    keywords = "Control strategy, Hybrid Cascaded Multilevel Converter (HCMC), Sizing of capacitor, Static Synchronous COMpensator (STATCOM)",
    author = "Pengfei Hu and Guerrero, {Josep M.} and Zhengxu He",
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    Design and analysis of a transformerless STATCOM based on hybrid cascaded multilevel converter. / Hu, Pengfei; Guerrero, Josep M.; He, Zhengxu.

    I: International Journal of Electrical Power and Energy Systems, Bind 104, 01.2019, s. 694-704.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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    AU - He, Zhengxu

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    AB - This paper presents a new concept of Static Synchronous COMpensator (STATCOM) based on a Hybrid Cascaded Multilevel Converter (HCMC). The HCMC consists of a two- level voltage converter and a wave-shaping circuit formed by cascaded H-bridge Sub-Modules (SM). Firstly, the operation principle and overall control strategy of HCMC are presented. After that, some key parameters including size of capacitors, numbers of sub-modules are in-depth analyzed. And then, a thorough comparison between the proposed HCMC-based STATCOM and conventional cascaded H-bridge based STATCOM is made, which turns out that the proposed HCMC-based STATCOM requires less number, size and stored energy of capacitors and has less power loss. Finally, a 35 kV/±50 Mvar HCMC-based STATCOM simulation model is constructed in PSCAD/EMTDC software platform. The simulation results validate the feasibility of the proposed HCMC-based STATCOM and the correctness of the analysis.

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