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- Title
DC current oscillations reduction in MMC-HVDC system.
- Authors
Hafeez, Kamran; Van den Bossche, Alex
- Abstract
Modular multilevel converter (MMC) is a type of voltage source converter (VSC) that offers several advantages, permitting suitable technology in high voltage direct current (HVDC) transmission systems. In the conventional non-energy-based control method, current does not manage capacitor energies inside MMC modules and produces DC current oscillations. Whereas in energy-based control methods, oscillations in DC current are reduced 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.
- Subjects
CURRENT fluctuations; SIMULATION software; IDEAL sources (Electric circuits); HIGH voltages; SUCCESSIVE approximation analog-to-digital converters; CRYSTAL oscillators; OSCILLATIONS
- Publication
Journal of Power Technologies, 2024, Vol 104, Issue 1, p86
- ISSN
2083-4187
- Publication type
Article