A PMSG control method for mechanical elastic energy storage based on parameter identification

Abstract

The invention relates to a parameter-identification-based PMSG control method for mechanical elastic energy storage. The method comprises: a full-system mathematical model of a permanent-magnet synchronous power generation device consisting of a vortex spring box, a transmission gearbox and a permanent-magnet synchronous generator is established; according to an MRAS and a Popov hyperstable theory, two kinds of identification algorithm capable of identifying generator parameters including an inductance value and a flux linkage and energy storage box parameters including a torque and a rotary inertia are designed for parameter changing observation; modeling is carried out by using identification values to eliminate a modeling error caused by internal and external parameter changes to the greatest extent; an adaptive backstepping controller is designed to calculate and obtain an adaptive law for describing resistor interference and control input signals of a d axis and a q axis; and then the control signals are inputted into the full-system mathematical model of the permanent-magnet synchronous power generation device, so that controlling of the permanent-magnet synchronous power generation device can be realized. Experiment results demonstrate that internal and external parameter changing interference of the system can be eliminated to the greatest extent; high-precision controlling of the generator can be realized; and the motor can output high-quality electric energy.

Description

technical field [0001] The invention relates to a PMSG control method for mechanical elastic energy storage based on parameter identification, which belongs to the technical field of motors. Background technique [0002] At present, the scale of intermittent new energy grid access continues to expand, and the peak load continues to rise. In order to solve the grid connection problem of intermittent power supplies and balance peak loads, technicians have proposed a permanent magnet motor type mechanical elastic energy storage system. Conversion of electrical energy. During the power generation process, the output torque of the vortex spring gradually decreases, and the moment of inertia gradually increases. In addition, affected by factors such as temperature, humidity, and magnetic saturation effects, the internal structural parameters of the permanent magnet synchronous generator, such as resistance, inductance, and flux linkage, will be difficult to measure directly and ...

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Problems solved by technology

In addition, affected by factors such as temperature, humidity, and magnetic saturation effects, the internal structural parameters of the permanent magnet synchronous generator, such as resistance, inductance, and flux linkage, will be difficult to measure directly and show uncertain characteristics, and the permanent magnet synchronous generator itself It is a multivariable, high-dimensional, strongly coupled nonlinear system. Traditional proportional-integral (PI) regulators are designed according to classical theories, relying on accurate motor models, and cannot follow changes in motor parameters and disturbances. The environment Weak adaptability, weak dynamic response ability, poor robustness, unable to meet the needs of high-quality power generation

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