Model predictive control and protection of MMC-based MTDC power systems

Ajay Shetgaonkar*, Le Liu, Aleksandra Lekić, Marjan Popov, Peter Palensky

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)
161 Downloads (Pure)

Abstract

Meshed offshore grids (MOGs) present a viable option for a reliable bulk power transmission topology. The station-level control of MOGs requires faster dynamics along with multiple objective functions, which is realized by the model predictive control (MPC). This paper provides control, and protection design for the Modular Multilevel Converter (MMC) based multi-terminal DC (MTDC) power system using MPC. MPC is defined using a quadratic cost function, and a dqz rotating frame voltage inputs are represented using Laguerre orthonormal functions. MPC has been applied for the control of both grid forming and grid following converters in a four-terminal MTDC setup, implemented for real-time Electromagnetic Transient (EMT) simulation. By applying numerous time-domain simulations, the advantages of the MPC when dealing with AC and DC side disturbances are investigated. The investigation highlights the MPC's inherent feature of fast response and high damping during- and post-disturbance, which is compared to the traditional PI controller performance. The analysis provides a comprehensive insight into the transient behavior of the MTDC during disturbances.

Original languageEnglish
Article number108710
JournalInternational Journal of Electrical Power and Energy Systems
Volume146
DOIs
Publication statusPublished - 2023

Keywords

  • GTFPGA
  • MMC
  • Model predictive control
  • MTDC
  • Software-in-the-loop
  • VARC DC CB
  • Wind power plant

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