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

A mechanical elastic energy storage and permanent magnet synchronization technology, applied in the field of control, can solve problems such as difficulty in meeting high-quality power generation control requirements, adverse effects on motor operation performance, and poor adaptability

CN105932922AActive Publication Date: 2016-09-07NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-09-07

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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.
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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...

Examples

Embodiment Construction

[0051] The present invention is realized by the following technical solutions:

[0052] 1. Mathematical modeling of permanent magnet synchronous generator

[0053] The whole system model of permanent magnet synchronous generator is as follows: figure 1 As shown, the gear box is simplified as a multi-degree-of-freedom "spring-mass-damper" model, where B P and B m are the viscous damping coefficients of the motor and the vortex spring respectively, T S Indicates the coil spring driving torque equivalent to the motor side, T m Indicates the torsional moment output by the elastic shaft of the vortex spring, ω and ω m Respectively represent the mechanical angular velocity of the generator rotor and the elastic shaft of the vortex spring.

[0054] During the power generation process, the permanent magnet synchronous motor operates in the generator state, assuming that the stator winding d-axis inductance L d Equal to the stator winding q-axis inductance L q , then the mathema...