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This paper compares the performance of unified power flow controllers (UPFCs), static var compensators (SVCs), and static compensators (STATCOMs) in commutation failure immunity (CFI) improvement of line-commutated converter-based high-voltage direct-current… Click to show full abstract
This paper compares the performance of unified power flow controllers (UPFCs), static var compensators (SVCs), and static compensators (STATCOMs) in commutation failure immunity (CFI) improvement of line-commutated converter-based high-voltage direct-current transmission (LCC-HVDC) systems. Theoretical analysis is presented to investigate the capacity requirements of SVCs, STATCOMs, and UPFCs to maintain the inverter-side ac voltage in the cases where three-phase faults occur on the receiving-end ac grids with different short-circuit ratio (SCR). Simulation studies were undertaken to validate the CFI improving performance achieved by UPFCs in comparison to SVCs and STATCOMs. Results of three-phase and single-phase fault tests manifest the superior CFI of LCC-HVDC systems having UPFCs installed.
Journal Title: IEEE Access
Year Published: 2020
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