Wind power generation double-hydraulic control variable pitch system

The invention discloses a wind power generation double-hydraulic control variable pitch system, which relates to the technical field of wind power generation. By the system, variable pitch control stability and accuracy can be improved, and energy consumption can be reduced; and the system is high in feathering speed. The system comprises a variable pitch base cylinder, an oil supply one-way valve, an oil supply energy accumulator, a cavity A oil inlet throttle valve, a cavity B control valve, a speed control valve, a cavity A hydraulic control one-way valve and a cavity B hydraulic control one-way valve, wherein an external high-pressure oil source is used for supplying oil to the oil supply energy accumulator and the cavity A oil inlet throttle valve through the oil supply one-way valve; a bidirectional lock structure is formed by the two hydraulic control one-way valves; oil outlets of the two hydraulic control one-way valves are connected to two operating cavities of the variable pitch base cylinder respe