DC current oscillations reduction in MMC-HVDC system

DC current oscillations

  • kamran hafeez, Dr. comsats
  • Alex Van den Bossche, Prof.Dr

Abstract

Modular multilevel converter (MMC) is a type of voltage source converter (VSC) that offers several advantages, permitting it a suitable technology in high voltage direct current (HVDC) transmission systems. The conventional non-energy based control method; current does not manage capacitor energies inside MMC modules and produced DC current oscillations. Whereas in energy based control methods, oscillations in DC currents reduces as differential currents are controlled. In this paper a Proportional resonant (PR) controller is designed to reduce oscillations in a DC-link of an HVDC system using non-energy based control method. It reduces oscillations by injecting even order harmonics in MMC. The proposed method is tested on a symmetrical monopole point-to-point MMC-HVDC system using PSCAD simulation software. Furthermore, the proposed method is also compared with a conventional Repetitive Current (RC) controller using bode plots. Analytical and simulation results validate the proposed method.
Published
2024-03-15
How to Cite
HAFEEZ, kamran; VAN DEN BOSSCHE, Alex. DC current oscillations reduction in MMC-HVDC system. Journal of Power Technologies, [S.l.], v. 104, n. 1, p. 86 -- 97, mar. 2024. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/1853>. Date accessed: 25 june 2024.
Section
Electrical Engineering

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