| 摘要 |
A control unit 11 senses the phase voltages for each phase of a utility grid 2, and the control unit 11 also senses the three phase sum active and reactive powers of the grid 2. A microcomputer (24) in the control unit 11 processes the measured data to determine the maximum output power Plim which wind turbine driven generators 13, connected to the grid 2, can be permitted to generate. The limit value is sent from control unit 11 to a control processor 12 which changes the operating parameters of the wind turbines 13 to limit their output power to below Plim. The wind turbines 13 may be adjustable with respect to wind direction according to the output from control processor 12. The problem of over-voltage supply on a weakly loaded grid is thereby avoided. |
