Research on Energy Dissipation Technology and AC Overvoltage Suppression of Sending End in UHVDC Transmission

Abstract For suppress the amplitude of overvoltage from HVDC sending terminal, an suppression scheme based on principle controllable energy dissipation was proposed. The mechanism a weak AC system under fault DC analyzed, and method operating CSREDD were Prototype develop tested, which proved correctness about design. device has been successfully applied to ±800kV Lu-Gu UHVDC transmission project. operation results show that can effectively overvoltage.