CN110867944A - Regenerative braking energy management system and uninterruptible power supply system - Google Patents
Regenerative braking energy management system and uninterruptible power supply system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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Abstract
The invention discloses a regenerative braking energy management system and an uninterruptible power supply system, wherein the regenerative braking energy management system comprises a controller, a rechargeable energy storage battery module and a battery management module which are connected with the controller, the uninterruptible power supply system is also connected with the rechargeable energy storage battery module and the battery management module, and the output of the uninterruptible power supply system is connected to a uninterruptible load. The rechargeable energy storage battery module for energy storage in the braking system is used as a backup battery of the uninterruptible power supply system, so that backup energy storage energy with larger output power is provided for the uninterruptible power supply system; meanwhile, the uninterrupted power system can conditionally charge the braking system battery module, so that the service life of the battery module is prolonged, and the reliability of the system is improved.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a regenerative braking energy management system and an uninterruptible power supply system.
Background
In recent years, urban rail transit develops rapidly, and various electromechanical systems are control platforms for rail transit operation command, passenger service and information transmission. The stable and uninterrupted power supply can ensure that the vehicle can be operated safely and efficiently, and high-quality service is provided for passengers.
Therefore, how to stably and uninterruptedly provide power for various electromechanical systems in a vehicle becomes an urgent problem to be solved.
However, various loads are connected in the utility grid, which causes interference and pollution to the grid, deteriorates the power supply quality, and affects the normal operation of the loads. Meanwhile, in an urban rail transit system, a brake system is a device for providing electric energy absorption for regenerative braking of a rail vehicle. Railway vehicles are often provided with a braking system. The in-situ braking system is also subject to interference and contaminated utility power grids, reducing battery life of stored energy in the braking system.
In current urban rail transit, set up uninterrupted power source system (UPS) at the subway station usually, because the influence of factors such as subway station space restriction, battery are with high costs, bulky, the battery quantity that disposes among the uninterrupted power source system is very limited, consequently, the time that uninterrupted power source system maintains emergent reserve power Supply is short, and power is little.
Therefore, the existing rail transit regenerative braking and uninterruptible power supply technology still needs to be improved.
Disclosure of Invention
The invention provides a BATTERY energy storage type rail transit regenerative braking energy management system and an uninterruptible power supply system based on the system, aiming at the technical problems, the energy management system comprises a main controller, a bidirectional power converter, a rechargeable energy storage BATTERY module and a BATTERY management module (BATTERY MANAGEMENT SYSTEM, BMS), and meanwhile, a bidirectional energy storage inverter connected with an energy storage BATTERY and the BATTERY management module, an intelligent fast switch unit and a uninterruptible load form a set of high-power uninterruptible power supply system. The regenerative braking energy management system and the uninterruptible power supply system of the invention use the rechargeable energy storage battery module used for energy storage in the braking system as the backup battery of the uninterruptible power supply system, provide backup energy storage energy with higher power for the uninterruptible power supply system and provide the uninterruptible power supply system which can improve the service life of the battery module and the reliability of the system.
In a first aspect, the technical solution provided by the embodiments of the present invention is: the utility model provides a regenerative braking energy management system, including the chargeable energy storage battery module and the battery management module of controller and connection, still include the uninterrupted power system who connects the controller, this uninterrupted power system still connects this chargeable energy storage battery module and connects this battery management module, the output of this uninterrupted power system is connected to uninterrupted power load.
In one embodiment, the uninterruptible power supply system comprises an intelligent fast switching unit and a bidirectional energy storage inverter, wherein the input of the intelligent fast switching unit is connected with a three-phase power grid, and the input of the bidirectional energy storage inverter is connected with the output of the intelligent fast switching unit to convert the alternating current commercial power input of the three-phase power grid into direct current; the output of the intelligent fast switching unit and the reverse output of the bidirectional energy storage inverter are connected to the uninterruptible load.
The regenerative braking energy management system braking system further comprises a main control unit and a bidirectional power conversion unit connected with the main control unit, wherein the output of the main control unit is connected to a contact network, and the bidirectional power conversion unit is connected to the rechargeable energy storage battery module and the battery management module.
When the alternating current commercial power is cut off, the intelligent quick switch unit instantly and quickly separates a three-phase power grid from the uninterrupted load, and the bidirectional energy storage inverter inverts the electric quantity of the rechargeable energy storage battery module into three-phase alternating current to supply power to the uninterrupted load.
In order to ensure the service life of the rechargeable energy storage battery module, the controller is provided with a charging control module, the charging control module is provided with an electric quantity lower limit value and an electric quantity upper limit value, the controller acquires the current electric quantity of the rechargeable energy storage battery module, and when the current electric quantity is lower than the electric quantity lower limit value when the three-phase electrician works normally, the bidirectional energy storage inverter is started to charge the rechargeable energy storage battery module; and when the current electric quantity is higher than the electric quantity upper limit value, starting the bidirectional energy storage inverter to start a grid-connected inverter module, and releasing energy to the three-phase power grid.
In another embodiment, the UPS system is an online UPS including a UPS power supply circuit including a rectifier, an inverter, and a static switch connected in series, and a bypass power supply circuit including a charger and a battery pack connected in series.
In a second aspect, the technical solution provided by the embodiment of the present invention is: the utility model provides an uninterrupted power system, including main control unit, the two-way power conversion unit of connecting this main control unit, chargeable energy storage battery module and battery management module connect this two-way power conversion unit, still include uninterrupted power system, this uninterrupted power system connects this chargeable energy storage battery module and connects this battery management module, the output of this uninterrupted power system is connected to the load that does not cut off the power supply.
In one embodiment, the uninterruptible power supply system comprises an intelligent fast switching unit and a bidirectional energy storage inverter, wherein the input of the intelligent fast switching unit is connected with a three-phase power grid, and the input of the bidirectional energy storage inverter is connected with the output of the intelligent fast switching unit to convert the alternating current commercial power input of the three-phase power grid into direct current; the output of the intelligent fast switching unit and the reverse output of the bidirectional energy storage inverter are connected to the uninterruptible load.
When the alternating current commercial power is cut off, the intelligent quick switch unit instantly and quickly separates a three-phase power grid from the uninterrupted load, and the bidirectional energy storage inverter inverts the electric quantity of the rechargeable energy storage battery module into three-phase alternating current to supply power to the uninterrupted load.
In another embodiment, the uninterruptible power supply system is an online UPS including a UPS power supply circuit including a rectifier, an inverter, and a static switch connected in series, and a bypass power supply circuit including a charger and a battery pack connected in series.
The beneficial effects of the embodiment of the invention are as follows: in the regenerative braking energy management system and the uninterruptible power supply system of the embodiment, the uninterruptible power supply system is connected to the rechargeable energy storage battery module and the battery management module of the braking system, and the rechargeable energy storage battery module for storing energy in the braking system is used as a backup battery of the uninterruptible power supply system, so that higher power output is provided for the uninterruptible power supply system; in addition, the uninterruptible power supply system is connected with the rechargeable energy storage battery module, so that the uninterruptible power supply system can conditionally charge the rechargeable energy storage battery module, the electric quantity of the uninterruptible power supply system is kept in a set range, the influence of interference and polluted mains supply power grids is avoided, and the service life of the battery module is prolonged.
Drawings
FIG. 1 is a system schematic block diagram of a first embodiment of a regenerative braking energy management system of the present invention;
FIG. 2 is a system schematic block diagram of a second embodiment of the regenerative braking energy management system of the present invention;
fig. 3 is a circuit block diagram of an intelligent fast switching unit in the ups system according to the present invention;
fig. 4 is a system schematic block diagram of a second embodiment of an uninterruptible power supply system of an embodiment of the invention; and
fig. 5 is a functional block diagram of an online UPS of an uninterruptible power supply system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Referring to FIG. 1, a system schematic block diagram of a first embodiment of a regenerative braking energy management system according to the present invention is shown. The regenerative braking energy management system of this embodiment mainly includes a braking system 100 and an uninterruptible power supply system 200.
The braking system 100 includes a rechargeable energy storage battery module 131 and a battery management module 132, and further includes an uninterruptible power supply system 200 connected to the controller 600.
The braking system 100 further includes a generator adapted to the vehicle model, a main control unit 110, a bi-directional power conversion unit 120, a rechargeable energy storage battery pack 131, and a battery management module 132 that can monitor and manage the performance of the battery. The braking system 100 recovers excess energy released by the vehicle during braking or coasting, converts the braking energy into electric energy through the generator, and stores the electric energy in the rechargeable energy storage battery pack 131 for subsequent acceleration of the vehicle. Meanwhile, the rechargeable energy storage battery pack 131 can also provide an uninterruptible power supply for power consumption equipment in a vehicle or a station, so that the purposes of environmental protection, energy conservation and emission reduction are achieved.
The ups system 200 of the present embodiment is connected to the rechargeable energy storage battery module 131 and the battery management module 132. The output of the ups system 200 is connected to a uninterruptible load 300. The UPS system 200 of the present embodiment is also called UPS, i.e., an uninterruptible power supply. Can be used to provide uninterrupted power supply to a single computer, computer network system or other power electronic device. When the mains supply input is normal, the uninterruptible power supply system 200 supplies the mains supply to the uninterruptible load 300 after stabilizing the voltage of the mains supply; when the utility power is interrupted, for example, due to an accident power failure, the ups system 200 immediately supplies 220 v ac power to the uninterruptible load 300 through inverter conversion, so that the load can maintain normal operation and protect the load software and hardware from damage.
Example 1
Referring to fig. 1, the regenerative braking energy management system of the present embodiment includes a controller 600, a braking system 100 connected to the controller 600, and an uninterruptible power supply system 200. The braking system 100 includes a rechargeable energy storage battery module 131 and a battery management module 132, and further includes an uninterruptible power supply system 200 connected to the controller 600, the uninterruptible power supply system 200 is further connected to the rechargeable energy storage battery module 131 and the battery management module 132, and an output of the uninterruptible power supply system 200 is connected to the uninterruptible load 300.
The braking system 100 further includes a main control unit 110 and a bidirectional power conversion unit 120 connected to the main control unit 110, wherein an output of the main control unit 110 is connected to a contact system, such as a subway contact system. The bidirectional power conversion unit 120 is connected to the rechargeable energy storage battery module 131 and the battery management module 132.
The main control unit 110 of the braking system 100 realizes data acquisition, communication, control, protection and the like in the whole working process, and the bidirectional power conversion unit 120 consists of a high-power IGBT module and a drive plate. When a vehicle enters a station, the voltage of the overhead line system rises, the main control unit 110 is triggered to absorb braking energy, and at the moment, the overhead line system charges a battery through power conversion; similarly, when the vehicle is out of the station, the voltage of the contact network is reduced, the main control unit 110 is triggered to release the battery energy, and the rechargeable energy storage battery module 131 discharges to the contact network through power conversion.
The ups system 200 of the present embodiment can be implemented in various ways, and the first embodiment is described below.
In the first embodiment, the uninterruptible power supply system 200 includes an intelligent fast switching unit 210 and a bidirectional energy storage inverter 220.
The input of the intelligent fast switch unit 210 is connected to a three-phase power grid, and the input of the bidirectional energy-storage inverter 220 is connected to the output of the intelligent fast switch unit 210, so as to convert the ac mains supply input of the three-phase power grid into dc power. The output of the intelligent fast switching unit 210 and the inverted output of the bidirectional tank inverter 220 are connected to the uninterruptible load 300. The bidirectional energy-storage inverter 220 is further connected to the rechargeable energy-storage battery module 131 of the braking system 100 and the battery management module 132, so as to realize the electric energy exchange between the uninterruptible power supply system 200 and the braking system 100.
When the commercial power is normally supplied, the uninterruptible load 300 is directly supplied with power by the commercial power, when the commercial power is suddenly cut off due to an accident, the intelligent fast switching unit 210 can instantly and quickly separate the power grid from the uninterruptible load 300, meanwhile, the bidirectional energy storage inverter 220 inverts the energy of the battery into three-phase alternating current to supply power to the uninterruptible load 300, and the whole switching process is completed within 10 milliseconds, so that the uninterruptible power supply is realized.
Referring to fig. 3, in an implementation, the intelligent fast switch unit 210 includes an ac circuit breaker 211 and a static switch 212 connected in series, and the static switch 212 is connected in series with a bypass circuit breaker 214. When the commercial power is normally supplied, the uninterruptible load 300 is directly supplied with power by the ac commercial power, when the ac commercial power fails, the intelligent fast switching unit 210 instantly separates the three-phase power grid from the uninterruptible load 300, and the bidirectional energy storage inverter 220 inverts the electric quantity of the rechargeable energy storage battery module 131 into the three-phase ac power to supply power to the uninterruptible load 300. The load or the microgrid can be separated from the power grid instantly, for example, within 10 milliseconds, meanwhile, the bypass breaker 14 has a short-circuit protection function, and the bypass breaker 214 with a loop redundancy design can be used when a rapid switch fails, so that power failure in important time periods is ensured.
In order to ensure the service life of the rechargeable energy storage battery module 131, the controller 600 is provided with a charging control module, the charging control module is provided with an electric quantity lower limit value and an electric quantity upper limit value, the controller 600 obtains the current electric quantity of the rechargeable energy storage battery module 131, and when the current electric quantity is lower than the electric quantity lower limit value when the three-phase electrician works normally, the bidirectional energy storage inverter 220 is started to charge the rechargeable energy storage battery module 131; when the current electric quantity is higher than the electric quantity upper limit value, the bidirectional energy storage inverter 220 is started to start a grid-connected inverter module, and energy is released to the three-phase power grid.
In order to ensure the service life of the batteries in the rechargeable energy storage battery module 131 sufficiently, the batteries in the rechargeable energy storage battery module 131 are usually operated optimally in the energy range of 30% -70%. In this embodiment, when the commercial power is supplied normally, the controller 600 detects that the remaining power of the rechargeable energy storage battery module exceeds the upper limit value by 70%, the bidirectional energy storage inverter 220 starts a grid-connected inversion function to release the excess power to the three-phase power grid, and when the remaining power of the rechargeable energy storage battery module 131 is lower than the lower limit value by 30%, the bidirectional energy storage inverter 220 starts a rectification charging function to charge the battery, thereby always ensuring that the power of the rechargeable energy storage battery module 131 is in a normal state.
Referring to fig. 2, the controller 600 may also be configured to be connected to the remote monitoring terminal 400 or the wireless communication module 410 in order to monitor the operation of the system. The operation, monitoring and protection of each component and each functional module of the whole system CAN realize data communication through communication buses, such as a CAN bus and a 485 bus, meanwhile, the controller 600 CAN be connected with an upper computer to realize remote monitoring, and the wireless communication module 410 is used for realizing wireless monitoring of the system.
As shown in fig. 4, in the second embodiment of the UPS system 200, the UPS system 200 is an online UPS500, which includes a UPS power supply circuit including a rectifier 231, an inverter 232 and a static switch 233 connected in series, and a bypass power supply circuit including a charger 234 and a battery pack 235 connected in series.
When the inverter 232 of the online UPS500 normally operates, the UPS power supply path is turned on, the bypass power-on path is turned off, and the inverter 232 supplies power to the uninterruptible load 300 through the static switch 233. When the inverter 232 is powered off due to a fault, the static switch 233 is switched to the bypass power supply path, and the uninterruptible load 300 is continuously powered by the mains bypass.
The regenerative braking energy management system of this embodiment combines the braking system 100 and the uninterruptible power supply system 200, so that the braking system 100 and the uninterruptible power supply system 200 share the same rechargeable energy storage battery module 131. The rechargeable energy storage battery module 131 of the braking system 100 is used for replacing a lead-acid battery of a traditional uninterruptible power supply system, so that the cost is saved, and the space utilization rate is increased. Meanwhile, the controller 600 reasonably manages and controls the rechargeable energy storage battery module 131, so that the rechargeable energy storage battery module 131 has long service life, high discharge rate, high energy density and large stored energy, and supports the uninterrupted power supply requirement of a super-high power load.
In the first embodiment of the uninterruptible power supply system 200, the bidirectional energy storage inverter 220 not only supports offline load independent operation, but also has the functions of grid-connected inversion, rectification charging and the like, and can be used for building a microgrid. The bidirectional energy storage inverter 220 simultaneously supports multiple parallel machines to increase power, so that the system can be compatible with loads of various power types for use.
Moreover, the bidirectional energy storage inverter 220 in the uninterruptible power supply system 200 has a certain maintenance function on the battery of the rechargeable energy storage battery module 131, so that the remaining capacity of the battery can be effectively kept within the range required by the braking system 100, and the service life of the battery and the reliability of the system are improved. The backup rechargeable battery in the uninterruptible power supply system 200 of the invention does not separately configure a lead-acid battery with heavy weight and low energy density, but shares the energy storage battery of the subway braking system 100, thereby saving the cost and the space.
The regenerative braking energy management system, such as a subway, guides the electric power of a contact net into the interior of the train through a pantograph, and then provides power for the regenerative braking energy management system and provides electric power for subway illumination, air conditioners and the like.
The switching device in the uninterruptible power supply system 200 uses the intelligent fast switching unit 210, and the intelligent fast switching unit 210 has no hard contact point, is fast in response, long in service life and high in reliability, and supports super-high power circuit separation.
Example 2
The present embodiment explains the design scheme solely from the viewpoint of the brake system.
The ups system 200 of the present embodiment shares the storage power with the braking system 100, and the braking system 100 includes a main control unit 110, a bidirectional power conversion unit 120 connected to the main control unit 110, a rechargeable energy storage battery module 131, and a battery management module 132.
The rechargeable energy storage battery module 131 and the battery management module 132 are connected to the bidirectional power conversion unit 120, the ups system 200 is also connected to the rechargeable energy storage battery module 131 and the battery management module 132, and an output of the ups system 200 is connected to the uninterruptible load 300.
As a first embodiment of the uninterruptible power supply system 200, the uninterruptible power supply system 200 includes an intelligent fast switching unit 210 and a bidirectional energy storage inverter 220, an input of the intelligent fast switching unit 210 is connected to a three-phase power grid, an input of the bidirectional energy storage inverter 220 is connected to an output of the intelligent fast switching unit 210, and an ac utility power input of the three-phase power grid is converted into a dc power; the output of the intelligent fast switching unit 210 and the inverted output of the bidirectional tank inverter 220 are connected to the uninterruptible load 300.
In specific implementation, the intelligent fast switch unit 210 includes an ac breaker 211 and a static switch 212 connected in series, the static switch 212 is connected in series with a bypass breaker 214, when the commercial power is normally supplied, the uninterruptible load 300 is directly supplied with power by the ac commercial power, when the ac commercial power is interrupted, the intelligent fast switch unit 210 instantly and quickly separates the three-phase power grid from the uninterruptible load 300, and the bidirectional energy storage inverter 220 inverts the electric quantity of the rechargeable energy storage battery module 131 into three-phase ac power to supply power to the uninterruptible load 300.
As a second embodiment of the UPS system 200, the UPS system 200 is an on-line UPS500, which includes a UPS power supply circuit including a rectifier 231, an inverter 232, and a static switch 233 connected in series, and a bypass power supply circuit including a charger 234 and a battery pack 235 connected in series.
In the regenerative braking energy management system and the uninterruptible power supply system 200 of this embodiment, the uninterruptible power supply system 200 is connected to the rechargeable energy storage battery module 131 and the battery management module 132 of the braking system 100, and the rechargeable energy storage battery module 131 for energy storage in the braking system 100 is used as a backup battery of the uninterruptible power supply system 200, so as to provide a higher power output for the uninterruptible power supply system 200; moreover, the ups system 200 is connected to the ups system 200, so that the ups system 200 can conditionally charge the rechargeable energy storage battery module 131, so that the electric quantity of the rechargeable energy storage battery module is kept within a set range, thereby avoiding the influence of the disturbed and polluted mains supply power grid, and improving the service life of the battery module and the system reliability.
The regenerative braking energy management system of this embodiment combines the braking system 100 and the uninterruptible power supply system 200, so that the braking system 100 and the uninterruptible power supply system 200 share the same rechargeable energy storage battery module 131. The rechargeable energy storage battery module 131 of the braking system 100 is used for replacing a lead-acid battery of a traditional uninterruptible power supply system, so that the cost is saved, and the space utilization rate is increased. Meanwhile, the controller 600 reasonably manages and controls the rechargeable energy storage battery module 131, so that the rechargeable energy storage battery module 131 has long service life, high discharge rate, high energy density and large stored energy, and supports the uninterrupted power supply requirement of a super-high power load.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The regenerative braking energy management system is characterized by further comprising an uninterruptible power supply system connected with the controller, the uninterruptible power supply system is further connected with the rechargeable energy storage battery module and the battery management module, and the output of the uninterruptible power supply system is connected to a uninterruptible load.
2. The regenerative braking energy management system of claim 1, wherein the uninterruptible power supply system comprises a smart fast switching unit and a bidirectional energy storage inverter, wherein an input of the smart fast switching unit is connected to a three-phase power grid, and an input of the bidirectional energy storage inverter is connected to an output of the smart fast switching unit, so that an ac utility power input of the three-phase power grid is converted into a dc power; the output of the intelligent fast switching unit and the reverse output of the bidirectional energy storage inverter are connected to the uninterruptible load.
3. The regenerative braking energy management system of claim 2, wherein the braking system further comprises a main control unit and a bidirectional power conversion unit connected to the main control unit, an output of the main control unit is connected to a catenary, and the bidirectional power conversion unit is connected to the rechargeable energy storage battery module and the battery management module.
4. The regenerative braking energy management system of claim 2 or 3, wherein the intelligent fast switch unit comprises an ac breaker and a static switch connected in series, the static switch is connected in series with a bypass breaker, the uninterruptible load is directly powered by the ac mains when the ac mains is normally powered, the intelligent fast switch unit instantly separates the three-phase grid from the uninterruptible load when the ac mains is powered off, and the bidirectional energy storage inverter inverts the electric quantity of the rechargeable energy storage battery module into three-phase ac power to power the uninterruptible load.
5. The regenerative braking energy management system of claim 4, wherein the controller is configured with a charging control module, the charging control module is configured with a lower electric quantity limit and an upper electric quantity limit, the controller obtains a current electric quantity of the rechargeable energy storage battery module, and when the current electric quantity is lower than the lower electric quantity limit during normal operation of the three-phase electrician, the bidirectional energy storage inverter is started to charge the rechargeable energy storage battery module; and when the current electric quantity is higher than the electric quantity upper limit value, starting the bidirectional energy storage inverter to start a grid-connected inversion module, and releasing energy to the three-phase power grid.
6. The regenerative braking energy management system of claim 1, wherein the uninterruptible power supply system is an online UPS comprising a UPS power supply path and a parallel bypass power supply path, the UPS power supply circuit comprises a series rectifier, an inverter, and a static switch, and the bypass power supply circuit comprises a series charger and a battery pack.
7. The utility model provides an uninterrupted power source system, its characterized in that, with the shared storage electric energy of braking system, braking system includes the main control unit, connects main control unit's two-way power conversion unit, chargeable energy storage battery module and battery management module are connected two-way power conversion unit, uninterrupted power source system connects chargeable energy storage battery module and connection battery management module, uninterrupted power source system's output is connected to the load that does not cut off the power supply.
8. The uninterruptible power supply system according to claim 7, wherein the uninterruptible power supply system includes a smart fast switching unit and a bidirectional energy storage inverter, an input of the smart fast switching unit is connected to a three-phase power grid, and an input of the bidirectional energy storage inverter is connected to an output of the smart fast switching unit, so as to convert an ac utility power input of the three-phase power grid into a dc power; the output of the intelligent fast switching unit and the reverse output of the bidirectional energy storage inverter are connected to the uninterruptible load.
9. The uninterruptible power supply system according to claim 8, wherein the intelligent fast switch unit comprises an ac breaker and a static switch connected in series, the static switch is connected in series with a bypass breaker, the uninterruptible load is directly powered by ac mains when the ac mains is normally powered, the intelligent fast switch unit instantly separates a three-phase power grid from the uninterruptible load when the ac mains is powered off, and the bidirectional energy storage inverter inverts the electric quantity of the rechargeable energy storage battery module into three-phase ac power to power the uninterruptible load.
10. The uninterruptible power supply system of claim 9, wherein the uninterruptible power supply system is an online UPS comprising a UPS power supply path and a parallel bypass power supply path, the UPS power supply circuit comprises a series rectifier, an inverter, and a static switch, and the bypass power supply circuit comprises a series charger and a battery pack.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111740438A (en) * | 2020-06-16 | 2020-10-02 | 同济大学 | An urban rail transit regenerative braking energy management and control system and its control method |
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