15kw wind turbine off grid working system including: wind turbine main body( blades rotor, permanent magnet generator, rotor body, braking part, tail rod, tail vane), stand alone tower or lattice tower, charge controller with dump load, battery group, inverter. 15kw wind turbine on grid working system including: wind turbine main body (blades rotor, permanent magnet generator, rotor body, tail rod, tail vane), stand alone tower or lattice tower, PWM on grid controller with dump load, grid tie inverter.