Standby power supply system based on flywheel energy storage and generator

Abstract

The utility model provides a standby power supply system based on flywheel energy storage and a generator, and belongs to the technical field of standby power supplies. The controller is electrically connected with the mains supply, the flywheel energy storage system and the generator, monitors the running state of the mains supply, controls the flywheel energy storage system and the generator to start and stop according to the running state of the mains supply, and finally outputs the flywheel energy storage system and the generator through the output circuit; the flywheel energy storage system can make charging and discharging response within millisecond level, instantaneous power is provided, and the risk of power failure of key equipment is reduced; the running time and the starting frequency of the generator can be reduced by the participation of the flywheel energy storage system, so that the fuel consumption and the pollutant emission are obviously reduced, and the environment-friendly requirement is better met; the service life of the flywheel energy storage system is usually longer, and the replacement cost and the maintenance frequency are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a standby power supply technology field, specifically, relate to a kind of standby power supply system based on flywheel energy storage and generator. BACKGROUND

[0002] In many critical places, such as data centers, hospitals, factories, etc., it is crucial to ensure the continuous and stable supply of electricity. When the main power grid fails or power outage occurs, a reliable standby power supply system needs to be quickly put into operation to avoid causing significant losses and impacts.

[0003] The current common standby power supply scheme has some shortcomings. For example, simply relying on batteries as a standby power supply, its energy storage capacity is limited, and the number of charge and discharge is limited, with relatively short service life. Although the generator can provide larger power output, the starting time is longer, and it cannot provide power support instantly, and noise and pollution will be generated during operation.

[0004] Therefore, there is an urgent need for a standby power supply system with fast response, efficient energy storage and stable power supply. SUMMARY

[0005] Therefore, the utility model provides a kind of standby power supply system combining the advantages of flywheel energy storage and diesel generator, which realizes fast response, efficient energy storage and stable power supply.

[0006] The technical scheme of the utility model is realized as follows: a kind of standby power supply system based on flywheel energy storage and generator, including commercial power, flywheel energy storage system, generator and controller, the controller is connected with commercial power, flywheel energy storage system and generator, and the controller monitors the operating state of commercial power, and the controller controls the start-stop of flywheel energy storage system and generator according to the operating state of commercial power, and finally outputs by output circuit.

[0007] On the basis of the above technical scheme, preferably, the commercial power is connected with S1 switch, the generator is connected with S3 switch, and S1 switch and S3 switch are both connected with output circuit.

[0008] On the basis of the above technical scheme, preferably, the S1 switch and S3 switch are both connected with the controller.

[0009] On the basis of the above technical scheme, preferably, the flywheel energy storage system includes S2 switch, and the S2 switch is connected with output circuit.

[0010] On the basis of the above technical scheme, preferably, the S2 switch is connected with the controller.

[0011] On the basis of the above technical scheme, preferably, the flywheel energy storage system further comprises a transformer and a plurality of flywheel charge-discharge groups, and the transformer is electrically connected with the S2 switch and the plurality of flywheel charge-discharge groups.

[0012] On the basis of the above technical scheme, preferably, the flywheel charge-discharge group comprises a grid-forming converter and a plurality of flywheel units, and the grid-forming converter is electrically connected with the transformer and the plurality of flywheel units.

[0013] On the basis of the above technical scheme, preferably, the grid-forming converter is electrically connected with the controller.

[0014] On the basis of the above technical scheme, preferably, the flywheel unit comprises a machine-side converter and an energy storage flywheel, and the machine-side converter is electrically connected with the energy storage flywheel and the grid-forming converter.

[0015] On the basis of the above technical scheme, preferably, the machine-side converter is electrically connected with the controller.

[0016] The utility model relates to a kind of standby power supply system based on flywheel energy storage and generator relative to prior art has the following beneficial effects:

[0017] Flywheel energy storage system can make charge-discharge response within millisecond level, provide instantaneous power, reduce the risk of key equipment power failure;

[0018] The participation of flywheel energy storage system can reduce the operating time and start frequency of generator, thereby significantly reducing fuel consumption and pollutant emissions, and more in line with environmental protection requirements;

[0019] The service life of flywheel energy storage system is usually longer, reduces replacement cost and maintenance frequency. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0021] Figure 1 It is the principle diagram of the utility model one kind based on flywheel energy storage and generator's standby power supply system;

[0022] Figure 2 It is the circuit diagram of the utility model one kind based on flywheel energy storage and generator's standby power supply system. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0024] As shown in Figure 1 and Figure 2 A standby power supply system based on a flywheel energy storage and a generator, comprising a commercial power 1, a flywheel energy storage system 2, a generator 3 and a controller 4, the controller 4 is electrically connected with the commercial power 1, the flywheel energy storage system 2 and the generator 3, the controller 4 monitors the running state of the commercial power 1, the controller 4 controls the start and stop of the flywheel energy storage system and the generator according to the running state of the commercial power 1, and finally outputs by an output circuit 5. When the commercial power 1 normally supplies power, the flywheel energy storage system 2 is in a floating state to keep sufficient power, and at the same time the generator 3 is in a standby state; the generator 3 can be a fuel generator such as a diesel, gasoline or coal generator, or a water power generation device, and the present embodiment takes a diesel generator as an example. When the commercial power 1 suddenly loses power or the voltage is unstable, the controller 4 detects the fault, and the flywheel energy storage system 2 has the performance of rapid discharge, so it immediately switches to the flywheel energy storage system 2 to supply power to the output circuit after cutting off the commercial power 1 through the controller 4; with the passage of time, if the energy stored in the flywheel energy storage system 2 is about to be exhausted and the fault of the commercial power 1 is still not solved, the controller 4 starts the generator 3, and the controller 4 switches the power supply of the output circuit 5 to the generator 3. When the commercial power 1 recovers normally, the controller 4 switches back to the commercial power 1 for power supply, and then charges the flywheel energy storage system 2, and at the same time the generator 3 enters the standby state. The standby power supply system takes advantage of the fast response speed of the flywheel energy storage system 2 in charging and discharging, when the commercial power 1 fails, immediately supplies power to the output circuit 5 through the flywheel energy storage system 2 to avoid the fluctuation of the current and voltage of the output circuit 5 causing damage to the load, when the commercial power 1 cannot recover for a long time, the power supply is switched from the flywheel energy storage system 2 to the generator 3, which can ensure the long-term stable power supply of the output circuit 5, the power supply switching of the standby power supply is more stable, and the current and voltage of the output circuit 5 will not increase or decrease instantaneously, which protects the load and is convenient for protecting precision electrical appliances. The flywheel energy storage system can respond within milliseconds to provide instantaneous power, reducing the risk of power failure of critical equipment; the participation of the flywheel energy storage system can reduce the running time and starting frequency of the diesel generator, thereby significantly reducing fuel consumption and pollutant emissions, and more in line with environmental protection requirements; the service life of the flywheel energy storage system is usually longer, reducing the replacement cost and maintenance frequency.

[0025] The mains 1 is connected with S1 switch 11, the generator 3 is connected with S3 switch 31, S1 switch 11 and S3 switch 31 are electrically connected with output circuit 5.

[0026] S1 switch 11 and S3 switch 31 are electrically connected with controller 4, in order to more intelligent control S1 switch 11 and S3 switch 31's on and off, S1 switch 11 and S3 switch 31 are electrically connected with controller 4, do not need manual operation control S1 switch 11 and S3 switch 31's on and off, operation efficiency is higher, corresponding speed is faster, more accurate, avoid the fluctuation of output circuit 5 voltage and current, do not need manual operation, the safety of operation is improved.

[0027] The flywheel energy storage system 2 includes S2 switch 21, the S2 switch 21 is electrically connected with output circuit 5.S2 switch 21 controls the on-off of flywheel energy storage system 2 and output circuit 5, realizes flywheel energy storage system 2 to output circuit 5 power transmission and power off.

[0028] The S2 switch 21 is electrically connected with controller 4.Controller 4 controls S2 switch 21's power on and power off, operation efficiency is higher, corresponding speed is faster, more accurate, avoid the fluctuation of output circuit 5 voltage and current, do not need manual operation, the safety of operation is improved.

[0029] The flywheel energy storage system 2 further includes transformer 22 and several flywheel charge-discharge groups 23, transformer 22 is electrically connected with S2 switch 21 and several flywheel charge-discharge groups 23.Transformer 22 is used for adjusting the electric energy released by flywheel charge-discharge group 23 to the voltage required by output circuit 5, or adjusting the mains 1 voltage to the voltage required by flywheel charge-discharge group 23.

[0030] The flywheel charge-discharge group 23 includes network type converter 24 and several flywheel units 25, network type converter 24 is electrically connected with transformer 22 and several flywheel units 25.The network type converter 24 is electrically connected with controller 4.The flywheel unit 25 includes machine side converter 251 and energy storage flywheel 252, the machine side converter 251 is electrically connected with energy storage flywheel 252, network type converter 24.The machine side converter 251 is electrically connected with controller 4.

[0031] Use method:

[0032] When the commercial power 1 is normal, the S1 switch 11 and the S2 switch 21 are closed, and the S3 switch 31 is opened, the load on the output circuit 5 is powered by the commercial power 1, the generator 3 is standby, and the flywheel 252 of the flywheel energy storage system 2 is charged to the highest speed and then is in the standby operation in the float charging state;

[0033] When the commercial power 1 is powered off, the S1 switch 11 is opened, the flywheel 252 of the flywheel energy storage system 2 is immediately switched from the standby state to the discharging state, the kinetic energy of the flywheel 252 is converted into electric energy through the machine-side converter 251 and the grid-forming converter 24, the generator 3 is started, and the voltage, frequency and phase of the output circuit 5 are detected and automatically followed, after synchronization, the S3 switch 31 is closed, and the flywheel 252 is switched from the discharging state to the charging state;

[0034] After the commercial power 1 is restored, the grid-forming converter 24 automatically follows the voltage, frequency and phase of the commercial power 1, after the flywheel 252 is fully charged and synchronized with the commercial power 1, the S3 switch 31 is opened, and the S1 switch 11 is closed to restore the commercial power 1.

[0035] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flywheel energy storage and generator based backup power system, characterized by: The utility model provides a kind of flywheel energy storage system, including commercial power (1), flywheel energy storage system (2), generator (3) and controller (4), the controller (4) is electrically connected with commercial power (1), flywheel energy storage system (2) and generator (3), controller (4) monitors the operating state of commercial power (1), controller (4) controls the start-stop of flywheel energy storage system and generator according to the operating state of commercial power (1), finally output by output circuit (5);The flywheel energy storage system (2) further includes transformer (22) and several flywheel charge-discharge groups (23), transformer (22) is electrically connected with S2 switch (21) and several flywheel charge-discharge groups (23);The flywheel charge-discharge group (23) includes network type converter (24) and several flywheel units (25), network type converter (24) is electrically connected with transformer (22) and several flywheel units (25);The flywheel unit (25) includes machine side converter (251) and energy storage flywheel (252), the machine side converter (251) is electrically connected with energy storage flywheel (252), network type converter (24).

2. A flywheel-based energy storage and generator-based backup power system as claimed in claim 1, characterized in that: The commercial power (1) is connected with S1 switch (11), the generator (3) is connected with S3 switch (31), and the S1 switch (11) and the S3 switch (31) are electrically connected with the output circuit (5).

3. A flywheel-based energy storage and generator-based backup power system as claimed in claim 2, characterized in that: The S1 switch (11) and the S3 switch (31) are electrically connected with the controller (4).

4. A flywheel-based energy storage and generator-based backup power system as claimed in claim 1, characterized by: The flywheel energy storage system (2) includes S2 switch (21), and the S2 switch (21) is electrically connected with the output circuit (5).

5. A flywheel-based energy storage and generator-based backup power system as claimed in claim 4, characterized in that: The S2 switch (21) is electrically connected with the controller (4).

6. A flywheel-based energy storage and generator-based backup power system as set forth in claim 1, characterized by: The network type converter (24) is electrically connected with the controller (4).

7. A flywheel-based energy storage and generator-based backup power system as set forth in claim 1, characterized by: The machine side converter (251) is electrically connected with the controller (4).

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