Control systems for controlling a wind turbine

Claim 2

In a distributed module control system for controlling a wind turbine using multiple controllers and monitors, including turbine monitors, the combination comprising a) multiple modules that include microcontrollers, and having data input terminals and data output terminals, b) high level logic circuitry interconnecting the modules via selected data input and data output terminals, and c) certain modules also connected with said turbine monitors and controllers to control operation of the wind turbine in response to monitoring of turbine operation.

Claim 3

The system of claim 1 wherein said turbine monitors and controllers include: a turbine driven generator control a propeller overspeed monitor and control an AC mains voltage and frequency monitor a turbine yaw system control a wind speed monitor and control a cable twist monitor and control.

Claim 4

The system of claim 1 wherein the system includes multiple wind turbines, and multiple of said elements a), b) and c).

Claim 5

The system of claim 1 wherein said circuitry interconnecting said modules includes circuit components connecting between low internal voltage logic in each microcontroller and high signalling voltage logic paths between microcontrollers.

Claim 6

The system of claim 1 wherein said modules include: i) a wind speed module connected to acquire output data from a wind turbine tower mounted anemometer and to provide wind speed digital data, ii) an auto yaw module connected to acquire output data from a turbine nacelle mounted wind vane sensing nacelle direction relative to prevailing wind direction, and to provide error data, iii) an auto untwist module connected to respond to said error data and to control the turbine yaw motor.

Claim 7

The system of claim 5 wherein the auto untwist module is also connected to be responsive to twist state of a turbine platform to control the turbine yaw motor.

Claim 8

The system of claim 1 wherein the modules include a fault module for controlling a turbine brake, and at lest three of the following modules: i) a wind trigger module responsive to input from an anemometer at a tower mounting the turbine for signaling the fault module; ii) a yaw module responsive to a prevailing wind direction signal to control a turbine yaw motor for rotating a turbine platform to maintain turbine propeller alignment with wind direction; iii) an auto untwist module responsive to twisting of a turbine mounting platform to signal the fault module; iv) a generator control circuit responsive to turbine speed to signal an overspeed condition to the fault module; v) a generator temperature module responsive to generator temperature to signal said fault module; vi) a propeller control unit responsive to turbine speed to signal said fault module; vii) a line voltage and frequency module responsive to monitored line voltage and frequency to signal said fault module; and viii) a loss of phase module responsive to monitored phase of a three-phase mains system to signal the fault monitor in the event of phase loss.

Claim 9

The system of claim 7 wherein said modules are separate and discrete, and have individually replaceable circuit boards.