Large-power mixed cascading bridge-type unit power factor rectifier

The invention relates to a large-power mixed cascading bridge-type unit power factor rectifier. A main power circuit comprises a boosting inductor and cascading modules, the cascading modules include first to sixth modules, and cascading of the main power circuit of the unit power factor rectifier is in a single-phase bridge type, three-phase star connection, corner connection or double-star connection manners. The rectifier has the advantages that use of a power-frequency transformer is not required, power switch tubes of lower withstand voltage can be used to realize large-power rectification and transformation under a high voltage, and the amount of used fully-controlled switching elements is greatly reduced; the rectifier can operate in advanced, lagged, unit power factor and other conditions; the topology structure of the main power circuit is simplified, the cost is reduced, the efficiency is improved, the control complexity is reduced, and system control is simple; and the rectifier has great application values in the fields including high-voltage DC power transmission, large-power electronic power transformers, and large-power middle/high-voltage AC-DC-AC frequency converter.