Device and method for realizing direct-current power transmission by using three-phase alternating-current line

The invention belongs to the field of direct-current power transmission methods, and relates to a device and method for realizing direct-current power transmission by using a three-phase alternating-current line, and the device comprises a sending-end three-phase circuit breaker and a sending-end converter, the sending-end three-phase circuit breaker is arranged on the three-phase alternating-current line in series, and is used for controlling the on-off of the sending end of the three-phase alternating-current line; the two ends of the sending-end three-phase circuit breaker are connected with a sending-end converter in parallel, and the sending-end converter is used for rectifying three-phase alternating current into direct current. Through the arrangement of the sending end converter, the receiving end converter and various switches, the direct current transmission method can greatly improve the transmission capacity, and can realize various working modes. 本发明属于直流输电方法领域，涉及一种利用三相交流线路实现直流输电的装置及方法，包括：送端三相断路器及