Oghorada, OJK and Zhang, L (2019) Unbalanced and Reactive Load Compensation Using MMCC-Based SATCOMs With Third-Harmonic Injection. IEEE Transactions on Industrial Electronics, 66 (4). pp. 2891-2902. ISSN 0278-0046
Abstract
Modular multilevel cascaded converter-based STATCOMs are scalable to higher voltages without requiring a step-up transformer with multiple windings and can be realized using a low switching frequency, giving lower harmonic content and hence a reduced filtering requirement. The paper presents a new injection technique to extend the operating ranges of MMCC STATCOMs when used for negative sequence and reactive current compensation. A non-sinusoidal voltage or current containing a fundamental and its third harmonic component is injected to achieve phase cluster voltage balance. This technique reduces the maximum dc-link voltage for the star configuration, and the maximum converter phase circulating current for the Delta case, compared to applying only sinusoidal zero sequence components for mitigating the same degree of load unbalance. The analysis is confirmed experimentally, showing that the third harmonic injection can allow a significant improvement of STATCOM capability for simultaneous compensation of unbalanced load and reactive current.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
Keywords: | Delta connection; Modular Multilevel Cascaded Converter; STATCOM; Unbalanced load.; Star |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Communication & Power Networks (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Jun 2018 12:17 |
Last Modified: | 27 Jan 2021 10:35 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/TIE.2018.2849962 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:131838 |