The invention discloses a variable speed
constant frequency wind power generation
system integrated with an energy storing device and control methods. A variable
pitch draught fan is connected with a variable pump through a coupler, the variable pump, a one-way valve A, a two-position two-way electromagnetic
directional valve B, a variable motor and an
oil filter are sequentially connected through hydraulic pipelines to form a loop-locked main hydraulic speed regulation loop, the variable motor is connected with a power generator or an electromotor through a
clutch A, the energy storing device comprises a pump or a motor and a high-pressure gas
storage tank, and the power generator or the electromotor is connected with the pump or the motor through a
clutch B. A wind generating set and the energy storing device are integrated, the displacement of the variable pump and the displacement of the variable motor are independently regulated, maximum power tracing of a wind
turbine can be achieved, it can be guaranteed that the output rotating speed of the variable motor is constant, the output frequency of the power generator is stable, different control methods are adopted for different types of
wind power, the influences of the time and
climate change on
wind power generation are effectively avoided, the wind energy
utilization rate is greatly increased, and wind
electricity quality is improved.