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This paper proposes a improved hill climbing searching (HCS) maximum power point tracking (MPPT) control strategy for the dual power flow (DPF) wind energy conversion system (WECS) which is based on the electrical variable transmission (EVT). The proposed improved HCS MPPT strategy is developed based on the electrical power which is generated by the stator. The peak detection capability has been devised...
In the widely applied non-direct-driven wind power generation system, a gearbox is connected between the wind turbine and high-speed doubly fed induction generator so that the system can supply power with constant voltage and constant frequency as the wind turbine speed varies. However, the multilevel mechanical gearbox is rather vulnerable and poses many difficulties to maintain. Electrical variable...
This paper proposes a sensorless maximum power point tracking (MPPT) strategy for dual power flow wind energy conversion system (WECS) based on electrical variable transmission (EVT). The outer rotor torque of the EVT is suitably controlled according to the outer rotor speed to realize the MPPT without the knowledge of wind velocity. Moreover, the model reference adaptive system (MRAS) observers are...
This paper presents a dual-mode power control strategy for a dual power flow (DPF) wind power generation system (WPGS). When the wind power is below the rated value, two maximum power point tracking (MPPT) methods, namely speed feedback control and torque feedback control, are adopted and compared. On the other hand, when the wind power is above the rated value, the power control would be taken and...
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