Impact of VSC converter topology on fault characteristics in HVDC transmission systems

• DOI: 10.1049/cp.2016.0263
• Publication Date: 2016-06-14T11:19:00Z
• Authors: D. Tzelepis; Hengxu Ha; S. Subramanian; A. Dysko; S. Ademi; D. Vozikis
• Keywords: High-voltage direct current; HVDC converter station; Transient (computer programming); HVDC converter; Transmission system

This work presents the outcome of a comprehensive study that assesses transient behaviour two high voltage direct current (HVDC) networks with similar structures but using different converter topologies, termed two-level and half-bridge (HB) modular multilevel (MMC). To quantify impact topology on DC characteristics detailed comparative is undertaken in which responses HVDC network transients during dc side faults are evaluated. The systems permanent pole-to-pole poleto-ground analysed considering range fault resistances, positions along line, operational conditions as prerequisite. Fast Fourier Transform (FFT) has been conducted analysing di/dt for both architecture types taking into consideration sampling frequency 96 kHz compliance IEC-61869 IEC61850:9-2 DC-side voltages currents.