An optimal power tracking control system and method for a hydraulic wind turbine

Abstract

The invention discloses an optimal power tracking control system for a hydraulic wind turbine, comprising a sensor group and an industrial computer; the industrial computer makes a system safety logic judgment on the received pipeline parameters, and when the pipeline parameters exceed a corresponding preset threshold value Trigger the emergency stop, otherwise, combine the pipeline parameters, real-time wind speed, the speed and torque output by the wind turbine, the speed and torque output by the variable motor, the active power of the grid, and the best power corresponding to the current wind speed, calculate the variable motor The compensation value of the swing angle, combined with the variable motor swing angle reference value obtained from the grid-connected power generation control link, are jointly output to the variable motor to control the speed of the wind rotor, so that the active power output by the wind turbine can reach the corresponding maximum power at the current wind speed. The invention can adjust the swing angle of the variable motor in the hydraulic circuit by monitoring the rotational speed of the variable motor and the rotational speed of the wind turbine in real time, so as to realize real-time regulation of the output power of the variable motor and achieve optimal power tracking.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to an optimal power tracking control system and method for a hydraulic type wind turbine. Background technique [0002] With the development of human progress and society, the development and utilization of fossil energy has exceeded the load, the living environment has gradually deteriorated, and clean energy has gradually attracted everyone's attention. Wind energy is a member of clean energy. Unlike traditional fossil fuels, wind energy has huge reserves on the earth, and there is no pollution in the process of utilization. However, wind speed is a highly random and uncertain component, and the output power of the wind energy conversion system (WECS) is proportional to the cube of the wind speed, thus causing fluctuations in the output power of wind turbines. At the same time, in order to achieve the maximum wind energy utilization efficiency of wind turbines, That...

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Problems solved by technology

[0005] Patent CN201911310437.4 proposes a hydraulic wind turbine grid-connected speed control system. By controlling the variable motor swing angle, hydraulic energy storage subsystem and proportional throttle opening, the hydraulic wind turbine grid-connected speed control is realized. However, due to wind power The optimal power tracking control of the unit is a function that needs to be realized after the wind turbine has the function of grid-connected power generation, and the optimal power tracking control of the hydraulic wind turbine still needs to be studied

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