TRANSFORMERLESS HIGH VOLTAGE DIRECT CURRENT TRANSMISSION TOPOLOGICAL STRUCTURE

摘要

A transformerless high voltage direct current transmission topological structure comprising a high voltage charging circuit (R, KM), inductors (L1, L2), a rectifier circuit, and an inverter circuit. A high voltage power grid connects directly to the rectifier circuit via the high voltage charging circuit (R, KM) and the coupling or non-coupling inductor (L1). A rectified direct current supplies power to the inverter circuit via a long distance power line. An output terminal of the inverter circuit connects to the coupling or non-coupling inductor (L2). The rectifying circuit and the inverter circuit are both constituted by a plurality of power units, wherein each of the power units is a half-bridge structure or an H-bridge structure constituted by switch elements. The present topological structure enables a high voltage direct current transmission to achieve long distance, high capacity power transmission without requiring a transformer.