CN115333289A - Flywheel energy storage device based on double motors - Google Patents
Flywheel energy storage device based on double motors Download PDFInfo
- Publication number
- CN115333289A CN115333289A CN202211016945.3A CN202211016945A CN115333289A CN 115333289 A CN115333289 A CN 115333289A CN 202211016945 A CN202211016945 A CN 202211016945A CN 115333289 A CN115333289 A CN 115333289A
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- motor
- generator
- energy storage
- flywheel
- driver
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- 238000004146 energy storage Methods 0.000 title claims abstract description 30
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 19
- 230000002441 reversible effect Effects 0.000 claims abstract description 18
- 230000003993 interaction Effects 0.000 claims abstract 2
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000010248 power generation Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000001133 acceleration Effects 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1846—Rotary generators structurally associated with wheels or associated parts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/20—Structural association with auxiliary dynamo-electric machines, e.g. with electric starter motors or exciters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Control Of Multiple Motors (AREA)
Abstract
The invention discloses a flywheel energy storage device based on double motors, which comprises a flywheel rotor, a motor/generator, an auxiliary motor, two controllers, a driver, a bidirectional reversible driver, a rotary transformer, a display, a modem and other matched equipment. The flywheel rotor is coaxially assembled with the motor/generator and the auxiliary motor; the two controllers respectively drive the auxiliary motor and the motor/generator through the driver and the bidirectional reversible driver; the flywheel rotor is coaxially matched with the rotary transformer; the rotary transformer signals are processed by a modem and then transmitted to two controllers; the controller is in signal interaction with a display; through the cooperation of the high-speed conventional standby of the auxiliary motor and the acceleration, energy storage and speed reduction power generation of the motor/generator, the energy consumption can be saved, and the economic value is improved.
Description
Technical Field
The invention relates to the fields of flywheel energy storage, flywheel batteries, rotating batteries and double motors, in particular to a flywheel energy storage device based on double motors.
Background
At present, the flywheel energy storage is used as a pollution-free energy source and has a very important role.
Flywheel energy storage requires a high power motor/generator to drive a high mass density flywheel to rotate quickly due to its long life and high frequency deep charge and discharge. Meanwhile, the flywheel rotor reaching the rated rotating speed needs to be kept at a constant speed for occasional needs, and a high-power motor/generator drives the constant-speed rotor to obviously belong to a large horse-drawn trolley, so that the power supply cannot be saved, high-frequency charge and discharge are realized, the current directions in the silicon controlled rectifier are opposite in a very short time, the silicon controlled rectifier is easily burnt due to dead zone conduction, and the service life of core parts such as the silicon controlled rectifier is shortened. Therefore, the present invention will give a solution to this outstanding problem.
The invention patent with the patent application number of 201010573714.3 and the name of 'double-stator alternating current motor flywheel energy storage' uses an alternating current disc type motor to drive a flywheel, overcomes the defect of sliding contact of direct current electric brushes and greatly improves the working reliability. The scheme fully utilizes the section of the flywheel rotor of the disc type motor, reduces the integral height of the flywheel energy storage, but fails to save energy in a high-speed hot standby state;
the patent application number is 201220712382.7, and the invention patent is named as an integrated magnetic suspension energy storage flywheel dual-motor control system.A flywheel energy storage scheme is adopted, wherein an upper motor and a lower motor are matched with a flywheel, the upper direct current motor and the lower direct current motor are arranged at two ends of a flywheel rotor, the flywheel rotor is accelerated at the same current value, compared with a single large motor, the speed can be accelerated at the same power more quickly, and even if one motor is used in a high-speed hot standby state, the condition of 'big horse pulls a small car' type resource waste still exists;
the above patent all adopts two upper and lower motors/generators of the same type, and the effect of more than one large motor/generator of the same power reduces the production cost. However, the danger of resource waste and the conduction of the silicon controlled dead zone can occur by adopting any one of the upper motor and the lower motor.
Disclosure of Invention
The invention aims to provide a flywheel energy storage device based on double motors, which aims to solve the problems of energy saving and safety and stability improvement in a high-speed hot standby state in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention discloses a dual-motor-based flywheel energy storage device which comprises a flywheel rotor, a motor/generator, an auxiliary motor, two controllers, a bidirectional reversible driver, a rotary transformer, a display and other matched equipment.
The flywheel rotor is coaxially assembled with the motor/generator, the auxiliary motor and the rotary transformer;
the two controllers respectively drive the auxiliary motor and the motor/generator through the driver and the bidirectional reversible driver;
the rotary transformer signals are processed by a modem and then transmitted to two controllers;
the two controllers are respectively a controller 1 and a controller 2, and the two controllers can communicate and process data and can also interact with a display screen;
the auxiliary motor is less powerful than the motor/generator.
As a further scheme of the invention: the motor/generator may be an axial flux disc motor or a radial flux conventional motor;
as a still further scheme of the invention: the motor/generator can adopt a double-stator disc type motor or a radial magnetic flux upper and lower double motors;
as a still further scheme of the invention: the auxiliary motor can adopt an alternating current or direct current motor;
as a still further scheme of the invention: the controller is not related to a specific model, a specific product; the controller can adopt intelligent chips with functions of calculation, storage and judgment, such as a single chip microcomputer, a PLC, a DSP, an FPGA and the like, and is not limited to the intelligent chips;
as a still further scheme of the invention: the flywheel rotor can be made of high-density mass metal or nonmetal materials in a mixing mode;
compared with the prior art, the invention has the beneficial effects that: firstly, after the flywheel energy storage device speeds up to a rated rotating speed, the motor/generator does not output torque any more to stabilize the rotating speed of a flywheel rotor, but the auxiliary motor outputs the torque to stabilize the rotating speed, if the motor/generator contains permanent magnet materials, the temperature of the motor/generator is reduced, the possibility of demagnetization of the permanent magnet materials is reduced, and the service life of the permanent magnet materials is prolonged; secondly, the bidirectional invertible driver prepares for speed reduction discharge at any time, so that the possibility of breakdown of silicon controlled rectifier due to dead zone conduction is greatly reduced, and the safety and stability of charge and discharge are ensured; thirdly, for the energy storage power station effect exhibited by the large-mass and super-large-mass flywheel rotor, the high-speed hot standby state of the energy storage power station occupies most time in the whole charging and discharging process, so that the energy consumption can be reduced by using the auxiliary motor.
Drawings
FIG. 1 is a configuration diagram of a flywheel energy storage device based on double motors;
FIG. 2 is a system diagram of a flywheel energy storage device based on dual motors;
FIG. 3 is a preset diagram of a flywheel energy storage device system based on dual motors;
FIG. 4 is a preset diagram of a flywheel energy storage device system based on dual motors;
Detailed Description
The technical solution of the present patent will be further described in detail with reference to the following embodiments.
Referring to fig. 1, a flywheel energy storage device based on dual motors includes a flywheel rotor 4, a controller 1, a controller 2, a driver 1-1, an auxiliary motor 1-2, a bidirectional reversible driver 2-1, a motor/generator 2-2, a rotary transformer 3-2, a modem 3-1, a display 5, and other supporting equipment.
Referring to fig. 1, the flywheel rotor 4 is coaxially assembled with the motor/generator 2-2 and the auxiliary motor 1-2;
referring to fig. 1, the controller 1 drives an auxiliary motor 1-2 through a driver 1-1; the controller 2 drives the motor/generator 2-2 through the bidirectional reversible driver 2-1; the controller 2 feeds back electric energy generated by the motor/generator 2-2 to the bus by controlling the bidirectional reversible driver 2-1;
referring to fig. 1, the flywheel rotor 4 is coaxially matched with the rotary transformer 3-2;
referring to fig. 1, the signal of the resolver 3-2 is processed by the modem 3-1 and then transmitted to the controller 1 and the controller 2;
referring to fig. 1, the auxiliary motor 1-2 is used for high-speed hot standby and is matched with the motor/generator 2-2 for increasing the speed, storing energy and reducing the speed to generate electricity, so that energy consumption can be saved and economic value can be improved.
The working principle of the invention is as follows: referring to fig. 2, before using the apparatus, the following work is prepared: 1. confirming that the vacuum degree is normal, and confirming the vacuum degree in the shell of the flywheel energy storage device; 2. confirming that the temperature is normal and the rotary transformer sensor 3-2 works normally; 4. confirming that the controller 1 and the controller 2 are in normal wiring and normal communication with each component; in the first step, the charging is accelerated. The controller 2 outputs a control signal to the bidirectional reversible driver 2-1 to softly start the motor/generator 2-2 so that the flywheel rotor 4 is accelerated to a rated rotating speed from a static state; and step two, storing electricity at a constant speed. The controller 2 stops outputting a driving signal to the bidirectional reversible driver 2-1, the motor/generator keeps idling, the controller 1 judges the position of the flywheel rotor 4 according to the signal of the modem 3-1 and then sends a control signal to the driver 1-1 to drive the auxiliary motor 1-2 to stably operate at a rated rotating speed or the existing rotating speed; and thirdly, reducing the speed to generate power. The reason for the speed reduction of the flywheel rotor 4 can be summarized as power generation or shutdown maintenance, if power generation is carried out, the controller 1 stops outputting a control signal to the driver 1-1, the driver 1-1 stops driving the auxiliary motor 1-2, the controller 1 outputs a control signal to the bidirectional reversible change driver 2-1 according to a signal of the modem 3-1, and effective electric energy is output to a national power grid under the condition that the bidirectional reversible change driver 2-1 is matched with the flywheel rotor 4 in rotation speed; if the flywheel energy storage device is stopped for maintenance, the controller 1 and the controller 2 stop outputting control signals to the driver 1-1 and the bidirectional reversible variable driver 2-1, meanwhile, the alternating current contactor is connected to enable the auxiliary motor 1-2 and the motor/generator 2-2 to be connected with the energy consumption resistor, and the flywheel energy storage device is rapidly braked in an energy consumption braking mode.
When the flywheel energy storage device is used, the field factors are changed, and the implementation cannot be completely carried out according to the flow chart, so that the preset scheme for uncontrollable reasons is as follows:
referring to fig. 3, in the first case: and (6) performing sudden stop. The conditions of sudden stop and the like can be met in the processes of accelerating charging, constant-speed power storage and decelerating power generation. When the emergency stop occurs, the controller 1 and the controller 2 immediately stop outputting control signals to the driver 1-1 and the bidirectional reversible driver 2-1, and simultaneously switch on the alternating current contactor to enable the flywheel energy storage device to perform energy consumption braking.
Referring to fig. 4, in a second case: and (4) discharging at a reduced speed when the speed-up charging is not up to the rated rotating speed. The controller 2 stops outputting a driving signal to the bidirectional reversible change driver 2-1 to drive the motor/generator 2-2, judges the position of the flywheel rotor 4 according to a signal of the modem 3-1 and then controls the bidirectional reversible change driver 2-1 to enable the bidirectional reversible change driver to output electric energy to a national power grid in cooperation with the flywheel rotor 4.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (3)
1. A flywheel energy storage device based on double motors comprises a flywheel rotor (4), a motor/generator (2-2), an auxiliary motor (1-2), controllers (1, 2), a driver (1-1), a bidirectional reversible driver (2-1), a rotary transformer (3-2), a display (5), a modem (3-1) and other matched equipment. The flywheel rotor (4) is coaxially assembled with the motor/generator (2-2) and the auxiliary motor (1-2); the controllers (1 and 2) respectively drive the auxiliary motor (1-2) and the motor/generator (2-2) through the driver (1-1) and the bidirectional reversible driver (2-1); the flywheel rotor (4) is coaxially matched with the rotary transformer (3-2); signals of the rotary transformer (3-2) are processed by the modem (3-1) and then transmitted to the controllers (1, 2) for processing; the controllers (1, 2) are in signal interaction with a display (5).
2. The dual-motor based flywheel energy storage device as claimed in claim 1, wherein: the auxiliary motor (1-2) is less powerful than the motor/generator (2-2).
3. The dual-motor based flywheel energy storage device as claimed in claim 1, wherein: the rotary transformer (3-2), the auxiliary motor (1-2), the motor/generator (2-2) and the flywheel rotor (4) are assembled in the same axial direction, and the assembly sequence has no requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211016945.3A CN115333289A (en) | 2022-08-15 | 2022-08-15 | Flywheel energy storage device based on double motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211016945.3A CN115333289A (en) | 2022-08-15 | 2022-08-15 | Flywheel energy storage device based on double motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115333289A true CN115333289A (en) | 2022-11-11 |
Family
ID=83925117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211016945.3A Pending CN115333289A (en) | 2022-08-15 | 2022-08-15 | Flywheel energy storage device based on double motors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115333289A (en) |
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2022
- 2022-08-15 CN CN202211016945.3A patent/CN115333289A/en active Pending
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