A Novel Position Tracking Control Method for Energy Storage Process of Mechanical Elastic Energy Storage System

A mechanical elastic energy storage and system energy storage technology, which is applied in the field of motors, can solve the problems of the reduction of the counter-torque moment of inertia and the inability to guarantee the stable operation of the system, and achieve the effect of smooth operation of the speed and simple control equations

Active Publication Date: 2019-11-08
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Application Information

AI Technical Summary

Problems solved by technology

The large planar scroll springs fixed side by side in the volute spring box, the spring shrinks from the box wall to the mandrel during the energy storage process, which will cause the counter torque of the volute spring box to gradually increase and the moment of inertia to gradually decrease, which cannot guarantee the stable operation of the system

Method used

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  • A Novel Position Tracking Control Method for Energy Storage Process of Mechanical Elastic Energy Storage System
  • A Novel Position Tracking Control Method for Energy Storage Process of Mechanical Elastic Energy Storage System
  • A Novel Position Tracking Control Method for Energy Storage Process of Mechanical Elastic Energy Storage System

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Embodiment Construction

[0049] The present invention is realized by the following technical solutions:

[0050] 1. Mathematical model of mechanical elastic energy storage system

[0051] The mechanical elastic energy storage system consists of figure 1 As shown, the power grid drives the PMSM to achieve stable and efficient energy storage through the inverter under the control strategy of the present invention.

[0052]The mathematical model of PMSM in the d, q axis coordinate system can be written as:

[0053] Stator current equation

[0054]

[0055] Stator Flux Equation

[0056]

[0057] Rotor equation of motion

[0058]

[0059] Electromagnetic Torque Equation

[0060] T e =1.5n p ψ f i q (4)

[0061] In the formula: u d , u q , are stator d, q axis voltage respectively; i d , i q Respectively stator d, q axis current; R is stator resistance; L is stator inductance; n p is the number of pole pairs; ω is the rotational angular velocity of the motor; ψ f is the rotor flux ...

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Abstract

The invention relates to a novel position tracking control method in the energy storage process of a mechanical elastic energy storage system. In the energy storage process of a mechanical elastic energy storage system, conversion from electric energy to mechanical energy and storage of mechanical energy are realized by making a permanent magnet synchronous motor (PMSM) tighten a mechanical elastic energy storage device. In the energy storage process, a spring contracts from the box wall to the spindle, which will cause a gradual increase in the counter torque and a gradual decrease in the moment of inertia of a vortex spring box. A PMSM control scheme is needed to ensure accurate tracking of the PMSM angle (position) so as to ensure the accuracy of system energy storage, and to ensure that the output torque of PMSM can quickly track the counter torque of an energy storage box so as to ensure the safety of a control system. Virtual variables with the angle and torque of the energy storage box as the core are designed. A stator voltage equation under a d-q coordinate system is obtained according to the virtual variables and a parameter estimation result of an exponential forgetting method. The operation of an inverter is controlled based on the stator voltage equation so as to ensure the efficient and stable operation of the energy storage system.

Description

technical field [0001] The invention relates to a method for controlling the energy storage process of a mechanical elastic energy storage system, which belongs to the technical field of motors. Background technique [0002] The mechanical elastic energy storage system realizes the conversion and storage of electrical energy into mechanical elastic potential energy by controlling the permanent magnet synchronous motor (Permanent Magnet Synchronous Motor, PMSM) to tighten the mechanical elastic energy storage device (volute spring box) during the energy storage process. The large planar scroll springs fixed side by side in the volute spring box, the spring shrinks from the box wall to the mandrel during the energy storage process, which will cause the counter torque of the volute spring box to gradually increase and the moment of inertia to gradually decrease, which cannot guarantee the stable operation of the system . Contents of the invention [0003] The purpose of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/18
CPCH02P21/0017H02P21/18
Inventor 郑晓明米增强余洋马云凤孙辰军李晓龙魏明磊
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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