Interoperability of classical and advanced controllers in MMC based MTDC power system

L. Liu*, A.D. Shetgaonkar, A. Lekic

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
55 Downloads (Pure)

Abstract

This paper presents the modular-multilevel-converter (MMC) control interoperability (IOP) and interaction within the High Voltage Direct Current (HVDC)-based power system. IOP is a crucial issue in the large-scale HVDC grid with different suppliers. To accommodate future multi-vendor HVDC grids developments, this article comprehensively investigates the MMC control IOP issue. Firstly, the most commonly adopted proportional-integral (PI) control and other non-linear controllers, e.g., model predictive control (MPC), back-stepping control (BSC), and sliding mode control (SMC), are constructed for MMC. Then, the IOP simulations are carried out in a multi-terminal direct current (MTDC) system in real-time digital simulator (RTDS) environment. The most frequent transients of the practical projects, e.g., power flow changing, wind speed changing, and DC/AC grid faults, are simulated with eight different scenarios. Each scenario presents different control capabilities in maintaining system stability, more precisely, the scenarios with non-linear controllers show faster settling time and fewer DC voltage and power variations. Controller switchings are also achieved without bringing large system oscillations. This paper provides the optimal allocation strategy of controllers to cope with system transients.
Original languageEnglish
Article number108980
Number of pages16
JournalInternational Journal of Electrical Power & Energy Systems
Volume148
Issue number108980
DOIs
Publication statusPublished - 2023

Keywords

  • Interoperability
  • MMC non-linear control
  • MTDC system
  • MPC
  • Back-stepping control
  • Sliding-mode control
  • RTDS
  • Power system transients

Fingerprint

Dive into the research topics of 'Interoperability of classical and advanced controllers in MMC based MTDC power system'. Together they form a unique fingerprint.

Cite this