High-voltage ride-through strategy for wind turbine with fully-rated converter based on current operating range

Peilin Liu, Guofang Zhu, Lei Ding, Xuesong Gao, Chunjiang Jia, Chong Ng, V. Terzija

Research output: Contribution to journalArticlepeer-review

Abstract

During grid high-voltage ride-through (HVRT), a wind turbine (WT) with fully-rated converter (FRC) would experience an overvoltage at the DC link, which can threaten the safety of the DC link capacitors and the connected power modules. This paper investigates the process of the DC link voltage rise. Two concepts, current operating range (COR) and performance factor, are introduced to help propose a grid-side converter control strategy, in which the DC link overvoltage is greatly released or eliminated through injection of quantitative reactive current derived from the current margin of fully-rated converter and the grid voltage. The injected levels of reactive current into the grid are determined under different grid overvoltage conditions with reduced magnitude and occurrence of the DC link overvoltage. Thereby, the high-voltage ride-through capability of the fully-rated converter wind turbine is significantly improved. The detailed verification is obtained through simulations using DIgSILENT PowerFactory.

Original languageEnglish
Article number108101
JournalInternational Journal of Electrical Power and Energy Systems
Volume141
DOIs
Publication statusPublished - Oct 2022

Keywords

  • Current Operating Range
  • Fully-Rated Converter
  • High-Voltage Ride-Through
  • Performance Factor
  • Reactive Current

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