The control strategy of wind energy conversion system based on H-MMC under asymmetrical grid faults

Fei Rong; Jiajun Yan; Wenlong Sun; Sheng Huang; Qiuwei Wu

doi:10.1049/iet-pel.2019.0108

The control strategy of wind energy conversion system based on H-MMC under asymmetrical grid faults

Fei Rong
, Jiajun Yan
, Wenlong Sun
, Sheng Huang
, Qiuwei Wu

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

This paper proposes a topology of wind energy conversion system (WECS) based on hexagonal modular multilevel converter (H-MMC), which can connect the wind turbine and the AC grid with one stage conversion. It has the advantages of low power losses, low ripple of capacitor voltage and transformer-less grid connection. The operation principle of the proposed topology is analyzed in detail. Then, the positive and negative sequence control method is proposed to eliminate the 2nd harmonics in the output power of H-MMC under asymmetrical grid faults. The double proportional resonant (PR) controller is proposed to track arm current references without steady error. The effectiveness of the proposed topology and its control method are verified by simulations and HIL tests.

Original language	English
Journal	I E T Power Electronics
Volume	12
Issue number	12
Pages (from-to)	3149 - 3157
ISSN	1755-4535
DOIs	https://doi.org/10.1049/iet-pel.2019.0108
Publication status	Published - 2019

Keywords

WECS
AC/AC
Hexagonal modular multilevel converter
Double PR controller
Asymmetrical grid faults

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10.1049/iet-pel.2019.0108

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title = "The control strategy of wind energy conversion system based on H-MMC under asymmetrical grid faults",

abstract = "This paper proposes a topology of wind energy conversion system (WECS) based on hexagonal modular multilevel converter (H-MMC), which can connect the wind turbine and the AC grid with one stage conversion. It has the advantages of low power losses, low ripple of capacitor voltage and transformer-less grid connection. The operation principle of the proposed topology is analyzed in detail. Then, the positive and negative sequence control method is proposed to eliminate the 2nd harmonics in the output power of H-MMC under asymmetrical grid faults. The double proportional resonant (PR) controller is proposed to track arm current references without steady error. The effectiveness of the proposed topology and its control method are verified by simulations and HIL tests. ",

keywords = "WECS, AC/AC, Hexagonal modular multilevel converter, Double PR controller, Asymmetrical grid faults",

author = "Fei Rong and Jiajun Yan and Wenlong Sun and Sheng Huang and Qiuwei Wu",

year = "2019",

doi = "10.1049/iet-pel.2019.0108",

language = "English",

volume = "12",

pages = "3149 -- 3157",

journal = "I E T Power Electronics",

issn = "1755-4535",

publisher = "John Wiley \& Sons Inc.",

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T1 - The control strategy of wind energy conversion system based on H-MMC under asymmetrical grid faults

AU - Rong, Fei

AU - Yan, Jiajun

AU - Sun, Wenlong

AU - Huang, Sheng

AU - Wu, Qiuwei

PY - 2019

Y1 - 2019

N2 - This paper proposes a topology of wind energy conversion system (WECS) based on hexagonal modular multilevel converter (H-MMC), which can connect the wind turbine and the AC grid with one stage conversion. It has the advantages of low power losses, low ripple of capacitor voltage and transformer-less grid connection. The operation principle of the proposed topology is analyzed in detail. Then, the positive and negative sequence control method is proposed to eliminate the 2nd harmonics in the output power of H-MMC under asymmetrical grid faults. The double proportional resonant (PR) controller is proposed to track arm current references without steady error. The effectiveness of the proposed topology and its control method are verified by simulations and HIL tests.

AB - This paper proposes a topology of wind energy conversion system (WECS) based on hexagonal modular multilevel converter (H-MMC), which can connect the wind turbine and the AC grid with one stage conversion. It has the advantages of low power losses, low ripple of capacitor voltage and transformer-less grid connection. The operation principle of the proposed topology is analyzed in detail. Then, the positive and negative sequence control method is proposed to eliminate the 2nd harmonics in the output power of H-MMC under asymmetrical grid faults. The double proportional resonant (PR) controller is proposed to track arm current references without steady error. The effectiveness of the proposed topology and its control method are verified by simulations and HIL tests.

KW - WECS

KW - AC/AC

KW - Hexagonal modular multilevel converter

KW - Double PR controller

KW - Asymmetrical grid faults

U2 - 10.1049/iet-pel.2019.0108

DO - 10.1049/iet-pel.2019.0108

M3 - Journal article

SN - 1755-4535

VL - 12

SP - 3149

EP - 3157

JO - I E T Power Electronics

JF - I E T Power Electronics

IS - 12

ER -

The control strategy of wind energy conversion system based on H-MMC under asymmetrical grid faults

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