Slcc commutation system for novel electric power system, method for controlling slcc commutation system, storage medium, and program product

Abstract

The present disclosure relates to the technical field of electric power transmission systems, and relates to an SLCC commutation system for a novel electric power system, and a method for controlling the SLCC commutation system. The SLCC commutation system for a novel electric power system comprises: a converter transformer for providing an alternating-current voltage and a converter unit for alternating-current and direct-current conversion. The converter transformer is connected in series to each phase in the converter unit by means of an inductor, each phase comprises an upper bridge arm and a lower bridge arm, each bridge arm comprises a VSC valve, an SVG branch is connected between the converter transformer and the converter unit, and the SVG branch is connected in parallel to an LCC converter valve; the SVG branch comprises a converter transformer and a reactor that are connected in series, and the output end of the reactor is connected to the converter transformer and the converter unit. The problems in conventional LCC direct-current power transmission technology of high dependence on an alternating current system and poor adaptability in a large-scale new energy pooling scene are solved, overvoltage of a transmitting end and undervoltage of a receiving end can be effectively suppressed, and the risk of commutation failure is reduced.

Dependencies are inferred from the claim text.