Transmission level MMC DC/DC Converter for large scale integration of renewable energy into HVDC grid

Huibin Zhang; Dragan Jovcic; Liangzhong Yao; Wang Xiang; Jinyu Wen

doi:10.1109/IPEMC.2016.7512708

Transmission level MMC DC/DC Converter for large scale integration of renewable energy into HVDC grid

Huibin Zhang
, Dragan Jovcic
, Liangzhong Yao
, Wang Xiang
, Jinyu Wen

China Electric Power Research Institute
Huazhong University of Science and Technology

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

2 Citations (Scopus)

Abstract

This paper presents the detailed description of DC/DC operation for reliable grid integration of renewable energy into HVDC grid, under normal operation and different fault conditions. The DC/DC uses the isolated dual-active-bridge DC/DC converter based on MMC (Modular Multilevel Converter) technology. Within the MMC DC/DC converter, an optimal efficiency control strategy to achieve minimal inner current magnitude and fast control for the full power range is proposed. At grid level, the 3-level cascaded current controller design achieves reliable power transfer and grid voltage control. Under normal grid operating conditions, the tie line DC/DC converter enables flexible power exchange between interconnected HVDC links. During fault conditions, the proposed DC/DC cascaded current controller limits the converter currents. The DC/DC converter will therefore function differently, either in power control mode or voltage control mode, for a proper post-fault grid management without grid-wide communication. The validity of the proposed DC/DC control is verified using a 4-terminal DC system with a large wind farm on a detailed PSCAD model for both normal and fault conditions.

Original language	English
Title of host publication	2016 IEEE 8th International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2602-2608
Number of pages	7
ISBN (Electronic)	9781509012107
ISBN (Print)	9781509012114
DOIs	https://doi.org/10.1109/IPEMC.2016.7512708
Publication status	Published - 13 Jul 2016
Event	8th IEEE International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016 - Hefei, China Duration: 22 May 2016 → 26 May 2016

Conference

Conference	8th IEEE International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016
Country/Territory	China
City	Hefei
Period	22/05/16 → 26/05/16

Bibliographical note

This study is sponsored by the Engineering and Physical Sciences Research Council (EPSRC) grant no EP/K006428/1, 2013.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

DC-DC power converters
HVDC transmission
power system protection
power system simulation
wind energy

Access to Document

10.1109/IPEMC.2016.7512708Licence: Unspecified

Cite this

Zhang, H., Jovcic, D., Yao, L., Xiang, W., & Wen, J. (2016). Transmission level MMC DC/DC Converter for large scale integration of renewable energy into HVDC grid. In 2016 IEEE 8th International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016 (pp. 2602-2608). Article 7512708 Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IPEMC.2016.7512708

Transmission level MMC DC/DC Converter for large scale integration of renewable energy into HVDC grid. / Zhang, Huibin; Jovcic, Dragan; Yao, Liangzhong et al.
2016 IEEE 8th International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016. Institute of Electrical and Electronics Engineers Inc., 2016. p. 2602-2608 7512708.

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

Zhang, H, Jovcic, D, Yao, L, Xiang, W & Wen, J 2016, Transmission level MMC DC/DC Converter for large scale integration of renewable energy into HVDC grid. in 2016 IEEE 8th International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016., 7512708, Institute of Electrical and Electronics Engineers Inc., pp. 2602-2608, 8th IEEE International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016, Hefei, China, 22/05/16. https://doi.org/10.1109/IPEMC.2016.7512708

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N2 - This paper presents the detailed description of DC/DC operation for reliable grid integration of renewable energy into HVDC grid, under normal operation and different fault conditions. The DC/DC uses the isolated dual-active-bridge DC/DC converter based on MMC (Modular Multilevel Converter) technology. Within the MMC DC/DC converter, an optimal efficiency control strategy to achieve minimal inner current magnitude and fast control for the full power range is proposed. At grid level, the 3-level cascaded current controller design achieves reliable power transfer and grid voltage control. Under normal grid operating conditions, the tie line DC/DC converter enables flexible power exchange between interconnected HVDC links. During fault conditions, the proposed DC/DC cascaded current controller limits the converter currents. The DC/DC converter will therefore function differently, either in power control mode or voltage control mode, for a proper post-fault grid management without grid-wide communication. The validity of the proposed DC/DC control is verified using a 4-terminal DC system with a large wind farm on a detailed PSCAD model for both normal and fault conditions.

AB - This paper presents the detailed description of DC/DC operation for reliable grid integration of renewable energy into HVDC grid, under normal operation and different fault conditions. The DC/DC uses the isolated dual-active-bridge DC/DC converter based on MMC (Modular Multilevel Converter) technology. Within the MMC DC/DC converter, an optimal efficiency control strategy to achieve minimal inner current magnitude and fast control for the full power range is proposed. At grid level, the 3-level cascaded current controller design achieves reliable power transfer and grid voltage control. Under normal grid operating conditions, the tie line DC/DC converter enables flexible power exchange between interconnected HVDC links. During fault conditions, the proposed DC/DC cascaded current controller limits the converter currents. The DC/DC converter will therefore function differently, either in power control mode or voltage control mode, for a proper post-fault grid management without grid-wide communication. The validity of the proposed DC/DC control is verified using a 4-terminal DC system with a large wind farm on a detailed PSCAD model for both normal and fault conditions.

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Transmission level MMC DC/DC Converter for large scale integration of renewable energy into HVDC grid

Abstract

Conference

Bibliographical note

UN SDGs

Keywords

Access to Document

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