Rectifier unit with two electrolysis series

The utility model discloses a rectifier unit with two electrolysis series, belonging to the technical field of rectifier units. The rectifier unit with the two electrolysis series comprises two rectifier units, wherein rectifier cabinets in the first rectifier unit are respectively connected with a first direct current (DC) main bus, and rectifier cabinets in the second rectifier unit are respectively connected with a second DC main bus; a common interbus is arranged between the first DC main bus and the second DC main bus; the first DC main bus, the second DC main bus and the common interbus are movably connected by using an aluminum bus; a positive bus DC isolation knife switch is arranged between each rectifier cabinet and a positive bus of the DC main bus and the common interbus, and a negative bus DC isolation knife switch is arranged between each rectifier cabinet and a negative bus of the DC main bus and the common interbus; a contrary-current sensor is arranged between each negative bus DC isolation knife switch and each rectifier cabinet; and a DC sensor is arranged between two contrary-current sensors connected with the same rectifier cabinet and the rectifier cabinet.