Control strategies of MMC-HVDC connected to large offshore wind farms for improving fault ride-through capability

Loading...
Thumbnail Image

Persistent link to this item

Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

Control strategies of MMC-HVDC connected to large offshore wind farms for improving fault ride-through capability

Published Date

2020-07

Publisher

Type

Thesis or Dissertation

Abstract

This paper proposes strategies to improve fault ride-through (FRT) capability of the modular multi-level converter (MMC) - high voltage direct current (HVDC) system connected to large offshore wind farms and performs simulations. In offshore wind power plants, HVDC system is indispensable for long-distance high-capacity transmission. The voltage rise of HVDC-link happens inevitably due to energy accumulation to satisfy low voltage ride-through (LVRT) regulation when a main grid fault occurs. This paper presents strategies for controlling HVDC-link voltages while minimizing the application of DC choppers and the mechanical and electrical stress of wind turbines through fast fault detection and current limit control of the master controller and wind turbine converter. PSCAD/EMTDC simulation is performed to verify the control strategies, and the results show that the FRT capability is enhanced by controlling HVDC-link voltage properly.

Description

University of Minnesota M.S.E.C.E. thesis. 2020. Major: Electrical/Computer Engineering. Advisor: Ned Mohan. 1 computer file (PDF); 82 pages.

Related to

Replaces

License

Series/Report Number

Funding information

Isbn identifier

Doi identifier

Previously Published Citation

Suggested citation

Choi, Woojung. (2020). Control strategies of MMC-HVDC connected to large offshore wind farms for improving fault ride-through capability. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/216310.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.