Permanent magnet direct drive type wind generating set control method and system based on rotating paddle energy storage

Abstract

The invention discloses a permanent magnet direct drive type wind generating set control method and system based on rotating blade energy storage, and the method comprises the steps: building a permanent magnet direct drive type wind generating set mathematical model of a wind generating set; solving an optimal rotor speed reference value and an optimal pitch angle reference value beta * of the wind turbine by adopting a specified optimization algorithm in combination with mechanical power P captured by the wind turbine from wind energy and a blade tip speed ratio lambda of the wind turbine; according to the rotating speed reference value and stator currents ia, ib and ic of the wind generating set, a motor of the wind generating set is controlled in a double-loop cascade control mode composed of a rotating speed outer loop and a current inner loop. According to the method, the rotor of the fan is used for storing a large amount of rotation kinetic energy, the wind energy loss of the wind power plant is reduced under the condition of wind curtailment of the wind power plant, energy storage equipment does not need to be additionally arranged, good economical efficiency is achieved, and the power output stability of the wind power plant can be improved.

Description

technical field [0001] The present invention relates to the control technology of wind power generators, in particular to a control method and system for permanent magnet direct drive wind power generators based on energy storage of rotating blades. Background technique [0002] Wind power generation is one of the most effective ways to solve the current world environmental pollution and energy crisis in renewable energy power generation, and it has attracted more and more attention from all countries. The permanent magnet direct-drive wind turbine does not require a speed-up gearbox, does not have slip rings and brushes, has high operating efficiency and low maintenance costs, and is an important development direction in the field of wind power technology. With the increasing installed capacity of wind farms in my country and the increasing penetration rate of wind power in the power grid, the adverse effects of the fluctuation of wind farm output power on the operation of ...

AI Technical Summary

Problems solved by technology

However, the current energy storage equipment is mainly based on battery energy storage, which is not suitable for frequent switching between charging and discharging, and cannot effectively cope with short-term changes in wind speed in wind farms; and this energy storage method requires the installation of additional energy storage equipment, which increases the The installed cost of wind farms reduces the economy

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