Position failure fault-tolerant driving control method for wind power generation pitch system

A pitch system, fault technology, applied in the direction of motor control, motor generator control, AC motor control, etc., can solve the problems of fan damage, limited size, sensor occupying motor system space, etc.

Active Publication Date: 2017-05-17
HARBIN INST OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the above-mentioned prior art, that is, to solve the problem that the blades of the fan cannot be feathered normally when the motor position sensor is damaged, thereby causing the overall damage of the fan, and at the same time

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  • Position failure fault-tolerant driving control method for wind power generation pitch system
  • Position failure fault-tolerant driving control method for wind power generation pitch system
  • Position failure fault-tolerant driving control method for wind power generation pitch system

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following embodiments.

[0021] Such as Figure 1 to Figure 6 As shown, a position fault-tolerant drive control method for a wind power generation pitch system involved in this embodiment:

[0022] 1. Position and speed Position estimation:

[0023] The block diagram of the drive control principle of the permanent magnet synchronous motor of the variable pitch system for wind power generation is as follows: figure 1 shown. according to figure 1 , the two-phase current i of the permanent magnet synchronous motor a ,i b , Bus voltage U dc , The SIN and COS signals of the resolver are detected by A / D and collected into the microprocessor, the v...

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Abstract

The invention discloses a position failure fault-tolerant driving control method for a wind power generation pitch system. During the operation of a permanent magnet synchronous motor, the electromagnetic parameters of the motor are detected; when the permanent magnet synchronous motor normally operates on the condition that a position sensor exists, the motor status information is calculated in real time; the position working status of the permanent magnet synchronous motor is judged, smooth switching between sensor control and sensor-less control of a driving control system is flexibly conducted according to the working status; under the sensor-less vector control double closed loop condition, the permanent magnet synchronous motor driving control method is set up; after the position sensor output signal breaks down during the normal operation of the permanent magnet synchronous motor, the permanent magnet synchronous motor is switched from a vector control system with actual position and rotation speed feedback into a sensor-less vector control mode using an estimated position and a speed signal. After the breakdown signal is removed, the system is switched from a sensor-less vector control mode into a position vector control mode in real time.

Description

technical field [0001] The invention relates to a position fault-tolerant drive control method for a wind power generation pitch system, and belongs to the technical field of position fault-tolerant drive control methods. Background technique [0002] The pitch system in wind power generation controls the speed of the wind rotor by controlling the angle of the blades, and then controls the output power of the fan, and can stop the fan safely through aerodynamic braking. When the fan is running normally, all parts rotate with the hub at a certain speed. When the wind speed exceeds the rated wind speed of the unit (wind speed is between 12m / s and 25m / s), in order to control the power output, the pitch angle is limited to 0 degrees to 30 degrees. degrees (the pitch angle is automatically adjusted according to changes in wind speed), and the speed of the wind rotor is kept constant by controlling the angle of the blades. Shutdown caused by any condition will cause the blades to...

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Application Information

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IPC IPC(8): H02P21/14H02P23/14H02P25/022
CPCH02P23/14H02P2207/05
Inventor 刘家曦李立毅
Owner HARBIN INST OF TECH
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