CN219779852U - Novel modularized dynamic UPS device and system - Google Patents
Novel modularized dynamic UPS device and system Download PDFInfo
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- CN219779852U CN219779852U CN202223580759.0U CN202223580759U CN219779852U CN 219779852 U CN219779852 U CN 219779852U CN 202223580759 U CN202223580759 U CN 202223580759U CN 219779852 U CN219779852 U CN 219779852U
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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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Abstract
The utility model discloses a novel modularized dynamic UPS device and a system, wherein the dynamic UPS device comprises an oil engine generator set and a flywheel system; the oil engine generator set comprises an engine, a generator and an excitation controller, wherein an engine output shaft is mechanically connected with a generator shaft, and the excitation controller is electrically and controllably connected with the generator and the energy storage converter; the flywheel system comprises a control motor, a planetary gear mechanism, a small flywheel component and an inverter, wherein the planetary gear mechanism is respectively and mechanically connected with the other end of the generator shaft, the small flywheel component and the control motor; the inverter is electrically and controllably connected with the control motor and the energy storage converter. The utility model provides a novel modularized dynamic UPS device and system, which have the advantages of uninterrupted high-efficiency direct current power output, quick starting response of an oil engine, small volume of a flywheel system, light weight, high safety, low cost, realization of high-power mobile energy storage and power grid frequency modulation, and reduction of dependence on high-power diesel engines and flywheel energy storage technologies.
Description
Technical Field
The utility model relates to a novel modularized dynamic UPS device and a system.
Background
In recent years, the development of energy storage technology and industry is highly emphasized in China, a series of policy measures are put forward, and' new energy source is greatly developed. However, the new energy is not high in utilization rate, difficult to digest in cost, difficult to play an effective role in a dispersing mode, reasonable in configuration, lack of scientific demonstration on scale and the like. In the markets of large UPS uninterruptible power supplies and power grid frequency modulation power supplies, the technology of adopting storage batteries and flywheel energy storage systems is increasingly applied.
The UPS is an uninterruptible power supply, and is divided into a dynamic UPS and a static UPS, and currently, the static UPS system on the market mostly adopts a storage battery as an energy storage unit, so that the system has the advantage of high energy storage density, and can provide long-time power supply for loads, but has the defects of large occupied area, high failure rate, unfriendly environment and other factors, and limits the application of the storage battery energy storage UPS.
A typical representative of a dynamic UPS is a flywheel UPS, which is used as an energy storage unit. The flywheel UPS system stores the electric energy as mechanical energy, has the advantages of high-efficiency storage, quick charge and discharge, high power density, high reliability, long service life, small occupied area, environmental friendliness and the like, and is particularly suitable for places where the power grid is frequently powered off. The dynamic UPS system mainly comprises a normal working power supply (usually a mains supply), a motor, a synchronous generator, a diesel engine, a clutch and an energy storage flywheel. The diesel engine starting time constrains the standby power requirement of the flywheel system (the flywheel energy storage is limited and can only be maintained for a short time), and as the requirement of load power is higher and higher, the manufacturing difficulty of the clutch is higher and higher, the energy required to be stored by the flywheel is more and more, and the use and development of the dynamic UPS are further limited by various factors such as system cost, safety, volume and the like.
For the current dynamic UPS power supply system, the structure of the dynamic UPS is complicated no matter the mechanical connection between the flywheel and the motor or the mechanical connection between the diesel engine and the generator through the clutch, so that the manufacturing difficulty is increased, the later maintenance work is difficult, and the manufacturing difficulty of the clutch is increased along with the higher and higher requirements of the load power.
Conventional flywheel UPS typically have a backup time of only 15 seconds for flywheel energy storage, which places significant limitations on their use. Particularly, when the high-power megawatt-level power grid peak regulation and frequency modulation uninterruptible power supply system is used as a standby power supply, the high-power flywheel energy storage system has the problems of high system price, large volume, safety and the like.
As an uninterruptible power supply, the flywheel UPS is short in standby time of only 15 seconds, and the starting time of a commonly configured oil engine is about 30 seconds, for example, serious power failure accidents can be caused by failure in starting of the oil engine, and then the system is required to further increase the capacity of the flywheel energy storage system to perform standby according to the full load peak power requirement of a load end, so that the starting time requirement of the oil engine for 30 seconds is met, and the cost of the flywheel UPS system is expensive and difficult to reduce.
Disclosure of Invention
The utility model aims to solve the technical problems of overcoming the defects of the prior art, and provides a novel modularized dynamic UPS device and system, which have the advantages of uninterrupted high-efficiency direct-current power output, quick starting response of an oil engine, small volume of a flywheel system, light weight, high safety, low cost, realization of high-power mobile energy storage and power grid frequency modulation, and reduction of dependence on high-power diesel engines and flywheel energy storage technologies.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the utility model provides a dynamic UPS device, which comprises an oil engine generator set and a flywheel system;
the oil engine generator set comprises an engine, a generator and an excitation controller, wherein an output shaft of the engine is mechanically connected with a generator shaft, and the excitation controller is respectively electrically and controllably connected with the generator and the energy storage converter;
the output shaft of the flywheel system is mechanically connected with the other end of the generator shaft in the oil engine generating set, and the inverter of the flywheel system is electrically and controllably connected with the energy storage converter.
Further, the flywheel system comprises an inverter, a control motor, a planetary gear mechanism and a small flywheel assembly;
the three degrees of freedom of the planetary gear mechanism are respectively and mechanically connected with the other end of the generator shaft, the small flywheel component and the control motor;
the inverter is respectively electrically and controllably connected with the control motor and the energy storage converter.
Further, the output shaft of the flywheel system is in transmission connection with a planet carrier in the planetary gear mechanism, the small flywheel assembly is in transmission connection with a gear ring in the planetary gear mechanism, and the control motor is in transmission connection with a sun gear in the planetary gear mechanism.
Further, the small flywheel component is formed by connecting a plurality of small flywheels in parallel in a transmission mode.
The system further comprises a battery pack, wherein a direct current bus of the battery pack is electrically connected with the oil engine generator set and a DC direct current side of the flywheel system in parallel, and transmits electric power to the energy storage converter; and the battery pack control signal is in control connection with the energy storage converter.
In another aspect, the utility model provides a novel modular dynamic UPS system comprising an energy storage converter and a dynamic UPS device.
Further, one end of the energy storage converter is electrically and signally connected with a commercial power AC side circuit, and the other end of the energy storage converter is electrically and signally connected with a dynamic UPS device DC side circuit.
Furthermore, the dynamic UPS device is provided with a plurality of dynamic UPS energy storage systems which are combined in parallel to form a high-power dynamic UPS energy storage system, and the dynamic UPS energy storage system is used for high-power scenes such as power grid frequency modulation.
Further, the dynamic UPS devices are connected in parallel to the direct current side and are electrically and controllably connected with a direct current side circuit of the high-power energy storage converter.
Furthermore, the energy storage converter and the dynamic UPS devices can be arranged in a 20-ruler standard container to realize up-down multi-layer arrangement, so that a high-power movable dynamic UPS energy storage system power supply vehicle or a standby power supply is formed.
By adopting the technical scheme, the utility model has the following beneficial effects:
1. the utility model can realize quick start of the engine, the flywheel system in the utility model can output mechanical torque to drive the main shaft of the engine to rotate while releasing the kinetic energy of the flywheel to generate electricity, and can quickly start dynamic ignition of the engine, so that the generator set can quickly and stably generate electricity and output, the start time of the oil engine is greatly shortened to be within 5 seconds, and quick response of the UPS system is realized.
2. The utility model can greatly shorten the starting time of the oil engine, correspondingly greatly shorten the standby time requirement of the flywheel UPS, greatly reduce the energy storage capacity and the power requirement of the flywheel system, and reduce the volume and the cost of the flywheel system.
3. The utility model adopts the planetary gear structure design, can amplify the flywheel power by k times, and compared with a motor or a generator used in the traditional flywheel energy storage system, the power of the control motor can be reduced to 1/k, so that the power of the control motor is greatly reduced, the power and the cost of an inverter are optimized, the heat loss and the energy loss of an electric drive system are reduced in the long-term operation process of the control motor, and the dual functions of saving energy and reducing the cost of the flywheel system are achieved.
4. The utility model adopts the small flywheel component formed by connecting the small flywheels in parallel, can reduce the manufacturing cost of the flywheel body, improves the safety, and greatly improves the energy storage capacity and the safety of the flywheel by adopting the high-speed small flywheel design and utilizing the parallel scheme of the small flywheels, thereby reducing the volume and the weight of the flywheel and the manufacturing cost of the flywheel.
5. The utility model adopts the design of the planetary gear mechanism, avoids the use and maintenance of a high-power clutch, improves the reliability of the system and reduces the cost of parts. The planetary gear mechanism is used as a power splitting element, the technology is mature, the power coupling is uninterrupted, and the planetary gear mechanism has the advantages of simplicity, reliability, maintenance-free performance, high transmission power, low cost and the like.
6. The output of the oil engine generator set in the dynamic UPS device is direct current, and compared with the traditional alternating current power generation, the dynamic UPS device has high efficiency, avoids a high-voltage inversion process, reduces the use of high-voltage power components and reduces the system cost.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of a dynamic UPS device and system architecture according to embodiment 1 of the present utility model;
FIG. 2 is a schematic diagram of a dynamic UPS device and system architecture according to embodiment 2 of the present utility model;
fig. 3 is a schematic diagram of a novel modular dynamic UPS system power cart in embodiment 3 of the present utility model.
Detailed Description
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example 1
As shown in fig. 1, embodiment 1 provides a dynamic UPS device, which includes an oil engine generator set and a flywheel system.
As shown in fig. 1, the oil engine generator set of the embodiment 1 comprises an engine 3, a generator 4 and an excitation controller 2, wherein an output shaft of the engine 3 is mechanically connected with an axis of the generator 4, and the excitation controller 2 is respectively electrically and controllably connected with the generator 4 and an energy storage converter 1; the output shaft of the flywheel system is mechanically connected with the other end of the shaft of the generator 4 in the oil engine generating set, and the inverter 5 of the flywheel system is electrically and controllably connected with the energy storage converter 1.
As shown in fig. 1, the flywheel system of the present embodiment 1 includes an inverter 5, a control motor 6, a planetary gear mechanism 7, and a small flywheel assembly 8; the three degrees of freedom of the planetary gear mechanism 7 are respectively and mechanically connected with the other end of the shaft of the generator 4, the small flywheel component 8 and the control motor 6; the inverter 5 is electrically and controllably connected to the control motor 6 and the energy storage converter 1, respectively. The flywheel system output shaft is in transmission connection with a planet carrier in the planetary gear mechanism 7, the small flywheel component 8 is in transmission connection with a gear ring in the planetary gear mechanism 7, and the control motor 6 is in transmission connection with a sun gear in the planetary gear mechanism 7. The small flywheel component 8 is formed by connecting a plurality of small flywheels in parallel transmission.
The working principle of the flywheel system in this embodiment 1 can be seen from the working principle of the power-increasing and energy-saving driving device in the driving device of the new energy automobile disclosed in the chinese patent with publication number CN103171426a, and the second motor/generator 4 in the power-increasing and energy-saving driving device is equivalent to the control motor 6 in the present utility model, and the description of this embodiment is omitted.
The dynamic UPS device and system in this embodiment 1 can be divided into 4 operating states, and these 4 operating states are described below:
1. power-off state
When the voltage sensor of the energy storage converter 1 detects that the AC voltage of the commercial power drops and drops to a certain threshold value, the energy storage converter 1 is judged to be in a power-off state at the moment, and the oil engine generator set and the flywheel system are started.
2. Discharge state
When in a discharging state, the energy storage converter 1 controls the inverter 5 of the flywheel system, and the kinetic energy of the small flywheel component 8 is transmitted to the control motor 6 through the planetary gear to generate electricity and is discharged to a load. Meanwhile, the output torque of the flywheel system transmits power to the shaft end of the generator 4 through the planetary gear, and drives the crankshaft of the engine 3 to accelerate to a certain rotating speed, then dynamic ignition starting is carried out, at the moment, the generator 4 carries out rotating speed control steady-state power generation, after the quick start of the generator set of the oil engine is successful and steady-state discharging takes over the load, the control motor 6 in the flywheel system realizes torque control, the flywheel system exits from discharging, the uninterrupted discharging dynamic switching of the UPS system is realized, and long-time power output can be provided.
3. State of charge
3.1, using the engine 3 margin power: the surplus power of the engine 3 is transmitted to the output shaft of the flywheel system through the shaft of the generator 4, and the small flywheel assembly 8 is accelerated to the highest rotating speed through the planetary gear, so that the energy charging is completed.
3.2, utilizing the surplus electric power on the power grid side to supplement energy: energy is obtained from a commercial power grid, and then the motor 6 is controlled to accelerate the small flywheel assembly 8 to the highest rotating speed through the planetary gear, so that energy charging is completed.
4. Standby state
And after the mains supply voltage is recovered to be normal, the flywheel system exits the discharge state and enters the standby state.
4.1, at the moment, the flywheel system obtains electric energy from the power grid, and the small flywheel assembly 8 keeps the highest rotating speed through controlling the motor 6, so that the flywheel system is always in a full energy state.
4.2, the engine 3 and the generator 4 stop working, and the oil engine is in a state to be started.
And 4.3, detecting the voltage fluctuation of the utility grid at the same time by a voltage sensor of the energy storage converter 1, and preparing for starting the UPS system next time.
Example 2
As shown in fig. 2, embodiment 2 provides a dynamic UPS device, which includes an oil engine generator set, a flywheel system, and a battery pack 9.
As shown in fig. 2, the dynamic UPS device 10 of this embodiment further adds a battery pack 9, where a DC bus of the battery pack 9 is electrically connected in parallel with the DC sides of the oil engine generator set and the flywheel system, and transmits electric power to the energy storage converter 1; the control signal of the battery pack 9 is connected to the energy storage converter 1 in a controlled manner.
Due to the addition of the battery pack 9, the battery pack 9 can be used for rapidly supplementing electricity when the mains supply is powered off in a short time, so that the starting times of the oil engine are reduced; and the flywheel system can be used as a composite energy storage device when the primary frequency modulation or the secondary frequency modulation of the power grid is carried out, so that the standby time and the energy storage capacity requirement of the flywheel system are reduced, and the safety redundancy of the system is also increased.
Example 3
As shown in fig. 3, this embodiment 3 provides a power supply vehicle equipped with a novel modular dynamic UPS system, which includes a plurality of dynamic UPS devices 10, an energy storage converter 1, a container 11, and a mobile towing vehicle 12.
The embodiment 3 provides a novel modularized dynamic UPS system power supply vehicle, which comprises an energy storage converter 1 and 4 dynamic UPS devices 10, wherein the 4 dynamic UPS devices 10 are connected in parallel on the direct current side and are electrically and controllably connected with a circuit on the direct current side of the high-power energy storage converter 1, and the alternating current side of the energy storage converter 1 is connected with a power grid circuit.
The novel modular dynamic UPS system power source vehicle of this embodiment 3 constructs a 1MW dynamic UPS system by using 4 dynamic UPS devices 10 of 250 KW; the modularized system can be placed in a movable container 11 for up-down multilayer arrangement integration, and a high-power movable dynamic UPS energy storage system power supply vehicle or a standby power supply is realized. The modularized, movable and uninterrupted power supply system can be flexibly applied to various power backup fields, such as data centers, hospitals, large-scale activities, power grid frequency modulation and other scenes. And the power supply of the factory building peak in the park reduces equipment and operation cost generated by power capacity increase, and reduces the production cost of enterprises.
The technical problems, technical solutions and advantageous effects solved by the present utility model have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present utility model and are not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present utility model should be included in the scope of protection of the present utility model.
Claims (10)
1. A dynamic UPS device, characterized in that: the system comprises an oil engine generator set and a flywheel system;
the oil engine generator set comprises an engine (3), a generator (4) and an excitation controller (2), wherein an output shaft of the engine (3) is mechanically connected with a shaft of the generator (4), and the excitation controller (2) is respectively connected with the generator (4) and the energy storage converter (1);
the output shaft of the flywheel system is mechanically connected with the other end of the shaft of the generator (4) in the oil engine generating set, and the inverter (5) of the flywheel system is connected with the energy storage converter (1).
2. The dynamic UPS device of claim 1, wherein: the flywheel system comprises an inverter (5), a control motor (6), a planetary gear mechanism (7) and a small flywheel assembly (8);
the three degrees of freedom of the planetary gear mechanism (7) are respectively and mechanically connected with the other end of the shaft of the generator (4), the small flywheel component (8) and the control motor (6);
the inverter (5) is respectively connected with the control motor (6) and the energy storage converter (1).
3. The dynamic UPS device of claim 2, wherein: the flywheel system output shaft is in transmission connection with a planet carrier in the planetary gear mechanism (7), the small flywheel component (8) is in transmission connection with a gear ring in the planetary gear mechanism (7), and the control motor (6) is in transmission connection with a sun gear in the planetary gear mechanism (7).
4. The dynamic UPS device of claim 2, wherein: the small flywheel component (8) is formed by connecting a plurality of small flywheels in parallel in a transmission way.
5. The dynamic UPS device of claim 1, wherein: the device further comprises a battery pack (9), wherein a direct current bus of the battery pack (9) is electrically connected with the oil engine generator set and the DC direct current side of the flywheel system in parallel, and transmits electric power to the energy storage converter (1); the control signal of the battery pack (9) is connected with the energy storage converter (1).
6. A novel modular dynamic UPS system, characterized by: comprising an energy storage converter (1) and a dynamic UPS device (10) according to any of claims 1 to 5.
7. The novel modular dynamic UPS system of claim 6, wherein: one end of the energy storage converter (1) is electrically and signally connected with a commercial power AC side circuit, and the other end of the energy storage converter (1) is connected with a DC side circuit of the dynamic UPS device (10).
8. The novel modular dynamic UPS system of claim 6, wherein: the dynamic UPS device (10) is provided with a plurality of devices.
9. The novel modular dynamic UPS system of claim 6, wherein: the dynamic UPS devices (10) are connected in parallel to the direct current side of the energy storage converter (1) and are connected with the direct current side circuit of the energy storage converter (1).
10. The novel modular dynamic UPS system of claim 6, wherein: the energy storage converter (1) and the plurality of dynamic UPS devices (10) are arranged in the container (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202223580759.0U CN219779852U (en) | 2022-12-31 | 2022-12-31 | Novel modularized dynamic UPS device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223580759.0U CN219779852U (en) | 2022-12-31 | 2022-12-31 | Novel modularized dynamic UPS device and system |
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| CN219779852U true CN219779852U (en) | 2023-09-29 |
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| CN202223580759.0U Active CN219779852U (en) | 2022-12-31 | 2022-12-31 | Novel modularized dynamic UPS device and system |
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- 2022-12-31 CN CN202223580759.0U patent/CN219779852U/en active Active
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