Duplex transformer offshore wind power direct current sending-out system and control method

The invention relates to a duplex transformer offshore wind power direct current sending-out system and a control method, and the system comprises a plurality of wind power plant booster stations which are grouped and accessed to an alternating current switch station, then are connected through two parallel connection transformers, and finally are accessed to a direct current system. When any one of the connected transformers breaks down and quits operation, the surplus power of the other connected transformer is rapidly calculated, the disconnected wind power plant booster station is determined by comparing the surplus power with the output power of the wind power plant booster station, the offshore wind power plant is controlled, the large-area offshore wind power plant is prevented from being off-grid, so the stability and reliability of direct current output of the offshore wind power plant are improved. 一种双联接变压器海上风电直流送出系统及控制方法，所述系统包括多个风电场升压站，分组接入交流开关场站，然后通过两台并联连接的联接变压器相连，最后接入直流系统。当联接变压器中任一台出现故障而退出运行时，快速计