| 摘要 |
The invention describes a method for maximum power point tracking approximation and speed control of a wind turbine using an AC-DC converter consisting of "passive" components only. The proposed system only uses passive electrical components or semiconductors such as inductors, capacitor or diodes. In the proposed concept this is done by designing an electric circuit so that it loads the generator output in such a way as to realize a pre-defined torque-frequency characteristic. By carefully choosing the values of the different components, the circuit can be tuned to fit an ideal torque-frequency curve. This torque characteristic is close to the maximum-power tracking control law up to the rated rotor speed, and steeply rises beyond that speed in order to maintain the rotor speed within a certain range and prevent turbine runaway. |
