Multiple synchronous four-quadrant high-voltage converting device

The invention provides a multiple synchronous four-quadrant high-voltage converting device with large power, small volume, structure unitization and convenient installation and maintenance based on 3/2 AC-DC-AC converting unit series connection and multiple superposition. The device consists of an user high-voltage working power supply, a bypass cabinet, a transformer cabinet, a controller, a power cabinet and utilization equipment, wherein the user high-voltage working power supply is connected with the bypass cabinet; the bypass cabinet is connected with the transformer cabinet; the transformer cabinet is connected with the power cabinet; the power cabinet is connected with the bypass cabinet; the bypass cabinet is connected with the utilization equipment; and the controller is embedded in the power cabinet. The executing component for power conversion is a 3/2 AC-DC-AC converting unit, the 3/2 AC-DC-AC converting units are connected by a copper belt in structural design, the controller is embedded in the p