A novel TQWT based protection and coordination scheme in multiterminal VSC HVDC systems
Year: 2024
Type: article
Abstract: Although the conventional protection system can provide sufficient protection for a point-to-point high voltage direct current (HVDC) system, fault detection and protection coordination in multiterminal HVDC (MTDC) systems still significant challenges. This paper presents a non-pilot fault detection and protection coordination technique for the MTDC systems. Initially, an extremely rapid fault detection method is proposed based on the energy of a tunable Q Wavelet transform (TQWT) signal processing technique. The proposed technique enhances fault detection performance by adjusting the wavelet transform (WT). Additionally, this study analyzes the impact of the Q-factor on the MTDC protection system. Finally, a protection coordination strategy with the main and backup protection systems is presented. A case study is conducted using PSCAD/EMTDC software, and MATLAB is employed to extract signal features. Simulation results confirm the accuracy and rapidity of the proposed method for the MTDC protection systems. The proposed method can detect the faults in approximately 1 ms under different fault types with high impedance faults (HIF) and noise.
Source: Electric Power Systems Research
Institutions: Energinet (Denmark), Aalborg University
Language: English
Subfield: Control and Systems Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,480
OpenAlex ID: W4405855056