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Flywheel energy storage system with electromagnetic coupler

An electromagnetic coupling, flywheel energy storage technology, applied in the field of flywheel energy storage system, can solve the problem of increasing the unbalanced power impact of the system

Pending Publication Date: 2022-03-29
STATE POWER INVESTMENT CORP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The connection of a high proportion of power electronic devices will cause the power grid to remain at a low inertia level for a long time, increasing the impact of unbalanced power in the system, which brings more and more pressure on the safe and stable operation of the power system

Method used

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  • Flywheel energy storage system with electromagnetic coupler
  • Flywheel energy storage system with electromagnetic coupler
  • Flywheel energy storage system with electromagnetic coupler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Such as figure 1 and figure 2 As shown, the flywheel energy storage system 1 of the present embodiment includes an electric motor 10, a flywheel 20, an electromagnetic coupler 30, a frequency converter 40, a generator 50, a first transfer shaft 71, a second drive shaft 72. The electromagnetic coupler 30 includes an inner rotor 32 and the outer rotor 31, and the inner rotor 32 is an input end of the electromagnetic coupler 30, and the outer rotor 31 is connected to the input end of the generator 50.

[0078] The motor 10 is located on one side of the flywheel rotor 20, and the first transport shaft 71 passes through the flywheel rotor 20 and transmits the flywheel rotor 20, and the transmission shaft 30 is transmitted to the output end of the motor 10. Connect, the other end of the first drive shaft 71 is connected to the inner rotor 32. One end of the second drive shaft 72 is connected to the outer rotor 31, and the other end of the second drive shaft 72 is connected to the...

Embodiment 2

[0085] Below image 3 Taking the flywheel energy storage system 1 of the present embodiment, the flywheel energy storage system 1 of the present embodiment includes an electric motor 10, a flywheel 20, an electromagnetic coupler 30, a frequency converter 40, a generator 50, and a speed ratio shifting device 61. The first transfer shaft 71, the second drive shaft 72, and the third transmitting shaft 73. The flywheel rotor 20, the motor 10, and the electromagnetic coupler 30 are similar to the embodiment, and the difference portions are not described herein.

[0086] Such as image 3 As shown, the first transport shaft 31 passes through the flywheel rotor 20 and transmits one end of the flywheel shaft 31 and the output end of the motor 10, and the other end of the first drive shaft 3 and the fixed speed ratio shift speed. The input end of the device 61 is driven. One end of the second drive shaft 32 is connected to the output terminal of the fixed speed ratio shifting device 61, and t...

Embodiment 3

[0095] Below Figure 4 Taking the flywheel energy storage system 1 of the present embodiment, the flywheel energy storage system 1 of the present embodiment includes an electric motor 10, a flywheel 20, an electromagnetic coupler 30, a frequency converter 40, a generator 50, a speed ratio adjustable device 62, The first transfer shaft 71, the second drive shaft 72, and the third transmitting shaft 73. The flywheel rotor 20, the motor 10, and the electromagnetic coupler 30 are similar to the embodiment, and the difference portions are not described herein.

[0096] Such as Figure 4 As shown, the first transport shaft 31 passes through the flywheel rotor 20 and transmits from the flywheel rotor 20, and one end of the first drive shaft 31 is connected to the output of the motor 10, and the other end of the first drive shaft 31 is adjustable. The input end of the device 62 is connected. One end of the second drive shaft 32 is connected to the output terminal of the shift ratio adjustme...

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Abstract

The invention provides a flywheel energy storage system with an electromagnetic coupler, which comprises a motor, a flywheel rotor, the electromagnetic coupler, a frequency converter and a generator, and is characterized in that the motor is connected with the flywheel rotor to drive the flywheel rotor to rotate, the electromagnetic coupler comprises an outer rotor and an inner rotor, and the outer rotor sleeves the inner rotor and is spaced from the inner rotor; the flywheel rotor is in transmission connection with the inner rotor, the inner rotor generates a rotating magnetic field to drive the outer rotor to rotate, and the frequency converter is connected with the outer rotor to change the current frequency of the outer rotor so as to change the magnetic field rotating speed matched with the current, so that the mechanical rotating speed of the outer rotor is kept constant. The generator generates power, accesses the power grid and inputs electric energy with stable frequency into the power grid, the requirement of power transmission to the power grid is met, power electronic devices are not needed, rotational inertia in the power grid can be improved, necessary voltage and frequency support is provided for the power grid, and the capacity of the power grid for efficiently accepting new energy is improved.

Description

Technical field [0001] The present invention relates to the field of energy storage, and more particularly to a flywheel energy storage system having an electromagnetic coupler. Background technique [0002] With the development of new round of energy changes based on cleaning energy, the proportion of new energy in my country's grid is getting higher and higher. However, in the new energy technology, the power electronic device is used to access the grid, and the power electronic device does not rotate the inertia, and it is not possible to provide the necessary voltage and frequency support for the grid, and cannot provide the necessary damping effect. In particular, as the penetration rate of distributed energy through the power electronics to the grid is increasing, the total rotational inertia of the grid is constantly decreasing, so the risk of large frequency deviation occurs when a major load or power mutation occurs. Also increasing. Access to high proportional power ele...

Claims

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Application Information

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IPC IPC(8): H02K7/02H02K49/10H02J3/30H02J15/00H02J3/24
CPCH02K7/025H02K49/106H02J3/30H02J15/007H02J3/241Y02E60/16
Inventor 陈俊吴智泉白宁沈峰刘雨涵孙册孙璇张蔚琦刘赟高康伟陈义学刘江王愐
Owner STATE POWER INVESTMENT CORP RES INST
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