Wind generating set variable pitch execution tracking supervision control system and method

Abstract

The invention provides a wind generating set variable pitch execution tracking supervision control system and method. A dynamic response process of a first-order variable pitch execution mechanism is introduced into a variable pitch execution error following algorithm, the deviation between an estimated variable pitch angle position and an actual variable pitch angle position is detected to judge whether a wind generating set encounters the condition that the variable pitch following error is continuously increased or not, if the variable pitch following error exceeds a set threshold value, the set enters shutdown operation, the situation that the set experiences the limit load is avoided to the maximum extent, and the operation safety of the set under the complex working condition is improved. A mode of estimating the variable pitch angle position is adopted, the control effect deviation caused by the fact that the characteristics of a variable pitch executing mechanism are not considered in a traditional mode is overcome, the dynamic response of the first-order variable pitch executing mechanism is innovatively combined into the variable pitch following error algorithm, and therefore the variable pitch following error and the trend situation are found out as soon as possible, and the control action is triggered to protect the set from adverse effects caused by pneumatic imbalance of an impeller.

Description

technical field [0001] The invention belongs to the field of wind power generation, and in particular relates to a wind power generation unit pitch execution tracking supervision control system and method. Background technique [0002] The wind rotor of the horizontal axis wind turbine absorbs wind energy and rotates, and then drives the connected generator to rotate to generate electricity. When the wind speed is above the rated wind speed, the wind turbine adopts the method of controlling the pitch angle to absorb or release the wind energy, so that the speed of the unit can be maintained near the rated speed, so as to maintain the rated power of the unit in the form of constant power or constant torque. Therefore, the control of the pitch angle is particularly important to the control system of the wind turbine, and a series of control actions including shutdown protection are all completed by the pitch angle control. The pitch angle control is generally given to the pit...

AI Technical Summary

Problems solved by technology

However, the actual situation is that the pitch actuator is generally driven by hydraulic or electric, and there are many and complicated components. For example, the pitch actuator fails to execute the required pitch angle command in the case of component failure.

Due to the actual implementation of the pitch angle of the three blades is d...

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