All-digital testbed for electric pitch control system of wind generating set

Abstract

The invention discloses an all-digital testbed for an electric pitch control system of a wind generating set, which comprises a motor butting fixed platform, wherein a plurality of fixing positions for fixing a pitch control motor of the wind generating set are arranged on the motor butting fixed platform, a load assistant motor is detachably arranged on each fixing position and coaxially opposite to the pitch control motor, and the rotating shafts of the load assistant motors and the pitch control motor are connected together through couplers. The all-digital testbed further comprises a servo driver which connects and controls all the load assistant motors, a controller which controls the servo driver, and a host computer which contains a human-machine interaction interface and is provided for operators to input control commands. The all-digital testbed can effectively test the response condition of the electric pitch control system when the paddle load varies (i.e. when the wind speed is disturbed), and meanwhile, feathering, low voltage riding through and other functions of the standby power supplies of the pitch control system can be tested. The construction of the testbed provides an effective way for ground test research of the electric pitch control system.

Description

technical field [0001] The invention belongs to the technical field of pitch control of wind power generating sets, and in particular relates to a test device for a pitch changing system of wind power generating sets. Background technique [0002] Against the background of the world energy crisis, wind power, as a clean and non-polluting energy, has been highly valued by various countries, and thus has achieved extremely rapid development. Since wind turbines are basically built in shallow sea areas or inland areas, installation and maintenance are inconvenient, so the reliability of their work is very important. To ensure the operational reliability of a wind turbine, several tests must be carried out before its installation. The wind turbines above the megawatt level put into commercial operation all over the world have adopted variable pitch technology. The combination of variable pitch control and frequency conversion technology has improved the power generation eff...

AI Technical Summary

Problems solved by technology

Although this method can add load disturbance during the motion of the pitch motor, its resistance varies with the speed. When the pitch motor is stationary, the torque of the magnetic powder brake also disappears. However, in the actual operation of the wind turbine, When the pitch angle of the blade is kept constant or the pitch angle of the blade is changed, the wind resistance on the blade always exists and is constantly changing

Moreover, wind turbines with different power levels and models have different power levels of the motors of the variable pitch system, and the communication methods with the control system of the wind turbines are also different. The electricity generated during the motor test needs to be consumed or fed back to the grid. It is difficult to meet the above requirements at the same time

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