The invention discloses a 66kV collection access-based flexible direct-current offshore converter
station, a
system and a control method, and the flexible direct-current offshore converter
station is characterized in that the offshore converter
station comprises a connection
transformer, a flexible direct-current converter valve and a bridge arm reactor, wherein the primary side of the connection
transformer is connected with a
bus bar of an offshore wind
plant; the primary side is connected with the input end of the flexible
direct current converter valve, the output end of the flexible
direct current converter valve is connected with the first end of the bridge arm reactor, and the second end of the reactor is connected with the
direct current submarine cable. And the investment and maintenance cost of an offshore booster station is saved. By increasing control strategies, increasing module
voltage, reducing the total number of converter valve modules, reducing
capacitance value, improving transmission capacity of equipment and reducing size and weight of an
offshore wind power plant, the problems of
land occupation, large load, high cost and the like of an offshore converter station can be effectively solved, technical cost of
engineering implementation is remarkably reduced, and the method is suitable for large-scale popularization and application. The method has better economical efficiency and is of great significance to large-scale development and utilization of
offshore wind power.