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A Control Method of HVDC-Modular Multilevel Converter Based on Arm Current Under the Unbalanced Voltage Condition
This paper proposes an enhanced control method for a high-voltage direct-current (HVDC) modular multilevel converter (MMC). To control an MMC-HVDC system properly, the ac current, circulating current, and submodule (SM) capacitor voltage are considered. The ac-side current is a fundamental frequency...
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Published in: | IEEE transactions on power delivery 2015-04, Vol.30 (2), p.529-536 |
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container_end_page | 536 |
container_issue | 2 |
container_start_page | 529 |
container_title | IEEE transactions on power delivery |
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creator | Moon, Ji-Woo Park, Jung-Woo Kang, Dae-Wook Kim, Jang-Mok |
description | This paper proposes an enhanced control method for a high-voltage direct-current (HVDC) modular multilevel converter (MMC). To control an MMC-HVDC system properly, the ac current, circulating current, and submodule (SM) capacitor voltage are considered. The ac-side current is a fundamental frequency component, and the circulating current is a double-line frequency component. Existing control methods control the ac current and circulating current by separating each component. However, the existing methods have a disadvantage in that the ac-side current must be separated into the positive and negative sequences for control under an unbalanced voltage condition. The circulating current consists of not only negative-sequence components but also positive- and zero-sequence components under an unbalanced voltage condition. Therefore, an additional control method is necessary to consider the positive- and zero-sequence components of the circulating current. The proposed control method has the advantage of controlling not only the ac-side current of the MMC but also the circulating current without separating each of the current components to control each arm current of the MMC. In addition, it can stably control the positive- and zero-sequence components of the circulating current under the unbalanced voltage condition. |
doi_str_mv | 10.1109/TPWRD.2014.2342229 |
format | article |
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To control an MMC-HVDC system properly, the ac current, circulating current, and submodule (SM) capacitor voltage are considered. The ac-side current is a fundamental frequency component, and the circulating current is a double-line frequency component. Existing control methods control the ac current and circulating current by separating each component. However, the existing methods have a disadvantage in that the ac-side current must be separated into the positive and negative sequences for control under an unbalanced voltage condition. The circulating current consists of not only negative-sequence components but also positive- and zero-sequence components under an unbalanced voltage condition. Therefore, an additional control method is necessary to consider the positive- and zero-sequence components of the circulating current. The proposed control method has the advantage of controlling not only the ac-side current of the MMC but also the circulating current without separating each of the current components to control each arm current of the MMC. In addition, it can stably control the positive- and zero-sequence components of the circulating current under the unbalanced voltage condition.</description><identifier>ISSN: 0885-8977</identifier><identifier>EISSN: 1937-4208</identifier><identifier>DOI: 10.1109/TPWRD.2014.2342229</identifier><identifier>CODEN: ITPDE5</identifier><language>eng</language><publisher>IEEE</publisher><subject>Capacitors ; Current control ; Frequency control ; HVDC transmission ; Moon ; multilevel systems ; Power conversion ; Voltage control ; voltage fluctuations</subject><ispartof>IEEE transactions on power delivery, 2015-04, Vol.30 (2), p.529-536</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c473t-e7e9ef469d07bfbd939fd284b4922a373d9845379566a2dc86478415944f30333</citedby><cites>FETCH-LOGICAL-c473t-e7e9ef469d07bfbd939fd284b4922a373d9845379566a2dc86478415944f30333</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/6877696$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>315,786,790,27957,27958,55147</link.rule.ids></links><search><creatorcontrib>Moon, Ji-Woo</creatorcontrib><creatorcontrib>Park, Jung-Woo</creatorcontrib><creatorcontrib>Kang, Dae-Wook</creatorcontrib><creatorcontrib>Kim, Jang-Mok</creatorcontrib><title>A Control Method of HVDC-Modular Multilevel Converter Based on Arm Current Under the Unbalanced Voltage Condition</title><title>IEEE transactions on power delivery</title><addtitle>TPWRD</addtitle><description>This paper proposes an enhanced control method for a high-voltage direct-current (HVDC) modular multilevel converter (MMC). To control an MMC-HVDC system properly, the ac current, circulating current, and submodule (SM) capacitor voltage are considered. The ac-side current is a fundamental frequency component, and the circulating current is a double-line frequency component. Existing control methods control the ac current and circulating current by separating each component. However, the existing methods have a disadvantage in that the ac-side current must be separated into the positive and negative sequences for control under an unbalanced voltage condition. The circulating current consists of not only negative-sequence components but also positive- and zero-sequence components under an unbalanced voltage condition. Therefore, an additional control method is necessary to consider the positive- and zero-sequence components of the circulating current. The proposed control method has the advantage of controlling not only the ac-side current of the MMC but also the circulating current without separating each of the current components to control each arm current of the MMC. In addition, it can stably control the positive- and zero-sequence components of the circulating current under the unbalanced voltage condition.</description><subject>Capacitors</subject><subject>Current control</subject><subject>Frequency control</subject><subject>HVDC transmission</subject><subject>Moon</subject><subject>multilevel systems</subject><subject>Power conversion</subject><subject>Voltage control</subject><subject>voltage fluctuations</subject><issn>0885-8977</issn><issn>1937-4208</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNo9kMtOwzAQAC0EEqXwA3DxD6Q4tuPHsYRHkVqBUFuOkRNvaJAbg-NW4u9JaMVpV9qZPQxC1ymZpCnRt8vX97f7CSUpn1DGKaX6BI1SzWTCKVGnaESUyhKlpTxHF133SQjhRJMR-p7i3LcxeIcXEDfeYl_j2fo-Txbe7pwJeLFzsXGwBzeQewgRAr4zHfRoi6dhi_NdCNBGvGptf4ob6LfSONNWPbP2LpoPGFzbxMa3l-isNq6Dq-Mco9XjwzKfJfOXp-d8Ok8qLllMQIKGmgttiSzr0mqma0sVL7mm1DDJrFY8Y1JnQhhqKyW4VDzNNOc1I4yxMaKHv1XwXRegLr5CszXhp0hJMUQr_qIVQ7TiGK2Xbg5SAwD_glBSCi3YL42HaIQ</recordid><startdate>20150401</startdate><enddate>20150401</enddate><creator>Moon, Ji-Woo</creator><creator>Park, Jung-Woo</creator><creator>Kang, Dae-Wook</creator><creator>Kim, Jang-Mok</creator><general>IEEE</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20150401</creationdate><title>A Control Method of HVDC-Modular Multilevel Converter Based on Arm Current Under the Unbalanced Voltage Condition</title><author>Moon, Ji-Woo ; Park, Jung-Woo ; Kang, Dae-Wook ; Kim, Jang-Mok</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c473t-e7e9ef469d07bfbd939fd284b4922a373d9845379566a2dc86478415944f30333</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Capacitors</topic><topic>Current control</topic><topic>Frequency control</topic><topic>HVDC transmission</topic><topic>Moon</topic><topic>multilevel systems</topic><topic>Power conversion</topic><topic>Voltage control</topic><topic>voltage fluctuations</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Moon, Ji-Woo</creatorcontrib><creatorcontrib>Park, Jung-Woo</creatorcontrib><creatorcontrib>Kang, Dae-Wook</creatorcontrib><creatorcontrib>Kim, Jang-Mok</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998–Present</collection><collection>IEEE Xplore</collection><collection>CrossRef</collection><jtitle>IEEE transactions on power delivery</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Moon, Ji-Woo</au><au>Park, Jung-Woo</au><au>Kang, Dae-Wook</au><au>Kim, Jang-Mok</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A Control Method of HVDC-Modular Multilevel Converter Based on Arm Current Under the Unbalanced Voltage Condition</atitle><jtitle>IEEE transactions on power delivery</jtitle><stitle>TPWRD</stitle><date>2015-04-01</date><risdate>2015</risdate><volume>30</volume><issue>2</issue><spage>529</spage><epage>536</epage><pages>529-536</pages><issn>0885-8977</issn><eissn>1937-4208</eissn><coden>ITPDE5</coden><abstract>This paper proposes an enhanced control method for a high-voltage direct-current (HVDC) modular multilevel converter (MMC). To control an MMC-HVDC system properly, the ac current, circulating current, and submodule (SM) capacitor voltage are considered. The ac-side current is a fundamental frequency component, and the circulating current is a double-line frequency component. Existing control methods control the ac current and circulating current by separating each component. However, the existing methods have a disadvantage in that the ac-side current must be separated into the positive and negative sequences for control under an unbalanced voltage condition. The circulating current consists of not only negative-sequence components but also positive- and zero-sequence components under an unbalanced voltage condition. Therefore, an additional control method is necessary to consider the positive- and zero-sequence components of the circulating current. The proposed control method has the advantage of controlling not only the ac-side current of the MMC but also the circulating current without separating each of the current components to control each arm current of the MMC. In addition, it can stably control the positive- and zero-sequence components of the circulating current under the unbalanced voltage condition.</abstract><pub>IEEE</pub><doi>10.1109/TPWRD.2014.2342229</doi><tpages>8</tpages></addata></record> |
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source | IEEE Electronic Library (IEL) Journals |
subjects | Capacitors Current control Frequency control HVDC transmission Moon multilevel systems Power conversion Voltage control voltage fluctuations |
title | A Control Method of HVDC-Modular Multilevel Converter Based on Arm Current Under the Unbalanced Voltage Condition |
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