Control method for permanent magnet synchronous generator for mechanical elastic energy storage

Abstract

Disclosed is a control method for a permanent magnet synchronous generator for mechanical elastic energy storage. According to the control method, a full-system mathematical model of a permanent magnet synchronous generation apparatus which is formed by a coil spring box, a speed-changing gear box and a permanent magnet synchronous generator which are connected in sequence is established firstly; then a state equation of the permanent magnet synchronous generator is established according to internal and external interferences, and a high-gain interference observer is designed; the comprehensive interference is evaluated by the high-gain interference observer; the control voltages of a d axis and a q axis are solved by designing a robust back-stepping controller L2; and finally, the control voltages are input into the full-system mathematical model of the permanent magnet synchronous generator to realize control on the permanent magnet synchronous generator. According to the control method provided by the invention, the high-gain algorithm based interference observer is designed based on the internal and external non-linear interferences; the robust back-stepping control law is designed based on the L2 interference suppression algorithm; test results prove that the control method can fully restrain internal and external non-linear interferences; and consequently, the high-precision control of the generator is realized, and high-quality electric energy output by the motor is ensured.

Description

technical field [0001] The invention relates to a method for controlling a permanent magnet synchronous generator for mechanical elastic energy storage, which belongs to the technical field of control. Background technique [0002] The permanent magnet synchronous generator has the advantages of high air gap flux density, large torque inertia ratio, simple and compact structure, high efficiency, fast response speed, etc., and is suitable for converting mechanical energy to electrical energy in permanent magnet motor mechanical elastic energy storage units execution equipment. Due to the electromechanical coupling characteristics of the permanent magnet motor mechanical elastic energy storage unit and the nonlinear characteristics of the permanent magnet synchronous generator, the key technical problem that needs to be solved when the mechanical elastic energy storage unit generates power is the nonlinear control problem of the permanent magnet synchronous generator. . In a...

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Problems solved by technology

In addition, when the permanent magnet synchronous generator is in power generation operation, the torque and moment of inertia of the coil spring as the power source are constantly changing, which will have a negative impact on the performance of the motor

In addition, the internal parameters of the permanent magnet synchronous generator are easily affected by the ambient temperature, humidity, etc., so that its internal parameters often deviate from the rated value. Difficult to meet the control requirements of high-quality power generation

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