Candidate: Mohamed Radwan
Date: December 15, 2023
Time: 10:00 AM - 11:00 AM
Place: Remote Attendance
Supervisor(s): Pirooz Azad, Sahar
Abstract:
To attain reliable future supergrids with low carbon emissions, multi-terminal HVDC grids are considered a promising candidate. HVDC grids facilitate the transmission of bulk power over long distances and the integration of renewable energy sources (RESs). Protection of HVDC grids is a crucial research trend that pursues further advancements to ensure the secure integration of green renewable resources, particularly offshore wind farms. To thoroughly protect HVDC grids during faults, primary and backup protection schemes as well as a fault location identification scheme are required to detect the fault, discriminate between internal and external faults, determine the exact fault location, and provide backup protection during relay or breaker failure events. Based on Hilbert-Huang Transform (HHT) and the extracted instantaneous features, i.e., instantaneous frequency and energy, from voltage measurements by HHT. The required schemes are proposed. A four-terminal HVDC grid is simulated in PSCAD/EMTDC software and various fault scenarios are investigated to verify the effectiveness and the reliable performance of the proposed schemes under severe fault conditions.