CN111064273A - Distributed micro-grid power supply system - Google Patents
Distributed micro-grid power supply system Download PDFInfo
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- CN111064273A CN111064273A CN201911297127.3A CN201911297127A CN111064273A CN 111064273 A CN111064273 A CN 111064273A CN 201911297127 A CN201911297127 A CN 201911297127A CN 111064273 A CN111064273 A CN 111064273A
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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
- H02J9/061—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 DC 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
Abstract
The invention provides a distributed micro-grid power supply system which comprises a power supply module (comprising a rectifying module, a control module and a bypass module) and a lithium battery module, wherein the height of the whole machine occupies 4-6U of a cabinet space, all the modules support hot plugging, the distributed system adopts high-voltage direct current (DC 240V) output and is distributed in racks at all power receiving ends as required, and all the distributed systems are connected through copper core cables and communication cables to form an energy micro-grid; the system intelligently schedules power resources among the devices according to preset rules, one device in the system fails or is overloaded, and uninterrupted power supply of loads carried by the system can be effectively guaranteed.
Description
Technical Field
The invention relates to a distributed micro-grid power supply system.
Background
The traditional centralized power supply scheme of the data center faces the following problems:
(1) the machine room space utilization rate is low, the construction cost is high, and the installation and implementation are difficult. The space ratio of the UPS to the IT equipment is about 2:3, and the space waste is large; because UPS equipment and storage battery are heavier, the requirement for bearing the load of a power battery room is higher than 16 KN/square meter, the requirement for the infrastructure is very high, and old machine buildings generally cannot meet the use requirement.
(2) The future demand is unclear, and the flexible capacity expansion is insufficient. The traditional centralized uninterrupted power supply system needs to be constructed once to meet the power supply capacity of one machine room or one floor, the design and demonstration period is long, and the initial investment is large; future ambiguity in demand often results in early power supply devices often operating at light loads; the expansion transformation and the system cutting are difficult to implement.
(3) The capacity of a single machine is larger and larger, and the operation and maintenance difficulty is high. Large-scale UPS needs professional UPS maintenance personnel, and the requirement on the maintenance personnel is high; the lead-acid storage battery needs to be regularly checked; the reliability of power supply depends on the reliability of a single machine of the UPS, and a single fault point exists.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the technical problem of the prior art and provides a distributed micro-grid power supply system which comprises a power supply module and a lithium battery module;
the power supply module comprises a rectification module, a control module and a bypass module;
the rectification module is used for realizing the conversion between alternating current and direct current; the control module is used for managing and controlling the power supply;
the lithium battery module is used for storing and discharging energy;
the three-phase 380V mains supply is converted into high-voltage direct current through the rectifier module, high-voltage direct current is transmitted to a load through the bypass module through the direct current bus, and meanwhile the lithium battery module is also interconnected with the direct current micro-grid and the bypass module through the direct current bus.
When the commercial power is normal, the load is supplied with power by the commercial power through the rectifying module, when the commercial power is cut off or the rectifying module fails, the load is directly supplied with power by the lithium battery module connected in parallel on the bus, or the load is controlled by the control module, the load is connected into the direct-current micro-grid, and the micro-grid supplies power to the load, or the system supplies power to other equipment on the micro-grid through the direct-current micro-grid.
The rectification module is an AC/DC module with adjustable AC voltage input and DC voltage output, and is digitally controlled by a DSP (digital signal processor), is subjected to resonant soft switching and adopts an active PFC (power factor correction) technology. The rectifier module has the characteristics of high power density, high power factor, small harmonic, high efficiency and the like, and has the performance of multiple modules in parallel connection.
The control module is used for uniformly processing the whole machine operation data transmitted back from the lithium battery module, the rectifying module and the bypass module, and finishing related operation measurement work and control operation (battery charging, voltage regulation of the rectifying module and the like) through communication between the control module and the management server through an SNMP protocol.
The control module consists of a control board card (the main control chip is STM32) and a control module shell and can reflect the running state of the module (the module has an alarm and can be displayed on an indicator light)
The strong current circuit in the lithium battery module is connected with the output of the rectification module in parallel; the lithium battery module is communicated with the control module through the CAN interface, transmits battery information and obtains control information.
The bypass module is internally provided with a micro-grid switch closing detection and load current and micro-grid current sensor (63A), and can complete switch closing detection and current measurement; after the microgrid switch is manually closed, the load of the distributed microgrid power supply system is connected with the microgrid, and after the closing signal is detected by the control module, corresponding control operation is carried out through the control module.
The bypass module is an interface module and can be detached independently when equipment is replaced, so that the load output is not influenced.
The bypass module is used for communicating (manually) a load with the high-voltage direct-current micro-grid when equipment is maintained or replaced, and the bypass module is interconnected with other modules through an internal strong current circuit.
The system has N, and the distributed setting is in N rack, rectifier module, control module, battery module and bypass module support the hot plug, and the system adopts high voltage direct current output, and output voltage 240VDC during operation, the system in every rack supplies this rack energy.
The control module carries out big data analysis according to the collected data, intelligently dispatches power resources among all cabinets, judges whether a standby system can provide enough electric quantity or not if the power supply of one system fails or is overloaded, directly uses the standby system to supply power if the power supply of the standby system is enough, and calls the system with low load to supply power for the failed cabinet if the power supply of the standby system is not enough.
The system intelligently integrates application functions such as a rectification function, a control function and battery power supply under the management of a distributed micro-grid, and performs strategy analysis and judgment and issues a control instruction in real time by acquiring and detecting operation parameter data information such as a load power consumption state, a battery operation state and a real-time working state of a rectification/control module.
The system can automatically provide operation alarm and working state control functions, intelligent management of load power utilization is achieved, load equipment can be controlled through level priority and load priority modes in specific operation, and priority guarantee supply of power is achieved intelligently.
The system occupies 4-6U space of the cabinet, and all modules support hot plugging;
the invention adopts a synchronous control technology, the power supply equipment in the same resource pool performs synchronous control processing, and before starting the electric energy sharing of the resource pool, the output end voltage of the power supply equipment is ensured to be synchronous with the output end voltage of the fault equipment;
the system intelligently schedules power resources among the distributed system devices according to a preset rule, one device in the system fails or is overloaded, and uninterrupted power supply of loads carried by the system can be effectively guaranteed;
the invention aims at the problems that a UPS single machine of a traditional centralized power supply system of a data center is strong in reliability dependence, low in space utilization rate, high in initial construction cost, incapable of elastically expanding capacity, high in operation and maintenance difficulty and the like. The power supply system host and the backup battery system are integrated into one device, and the device is arranged in a cabinet. And meanwhile, the output ends of all the power supply devices are connected through cables to form an energy micro-grid. The invention adopts a lithium battery backup power supply guarantee technology, a high-quality battery core, an advanced PACK process and a leading BMS technology.
The concept of the distributed micro-grid is developed in the climax of cloud computing, and the distributed micro-grid provides powerful support for virtualization of IT computing resources. The distributed micro-grid uniformly performs dynamic scheduling distribution by taking the energy supply of the data center as an energy pool, and can realize dynamic adjustment of the energy supply according to the distribution transformation of IT computing resources, so that the whole data center is more flexible and energy-saving in operation, and the space utilization efficiency is improved.
Has the advantages that: compared with the prior art, the invention has the following beneficial effects:
(1) the energy internet power supply system forms all power supply equipment into a resource pool, the equipment breaks down, the load in the same resource pool can be guaranteed not to be powered off, and meanwhile, the battery backup time of a single cabinet is effectively prolonged.
(2) The rack type deployment can save 30% of space area, and the floor bearing capacity is reduced to 6kN/m 2.
(3) The design is simple and quick, and the capacity can be flexibly expanded according to the deployment of actual traffic as required.
(4) Due to the introduction of the lithium battery technology, the service life of the product is as long as more than 10 years, and meanwhile, the maintenance-free performance of the whole life cycle is realized.
Drawings
The foregoing and/or other advantages of the invention will become further apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic block diagram of connection of modules according to an embodiment of the present invention.
Fig. 2 is a topological diagram of a distributed microgrid power supply system.
Fig. 3 is a power supply principle diagram of the fault machine.
Fig. 4 is a diagram of a microgrid architecture.
Fig. 5 is a schematic diagram of a system failure/maintenance/ac power failure condition detected by a control module.
Fig. 6 shows that the control module commands the distributed hvdc power system to access the microgrid to obtain power from the microgrid.
Detailed Description
As shown in fig. 1, 2, and 3, the present invention provides a distributed micro grid power supply system, which includes a power supply module and a lithium battery module;
the power supply module comprises a rectification module, a control module and a bypass module;
the rectifier module is used for realizing the conversion between alternating current and direct current, and the core devices are a capacitor (18000MFD/500VDC), a direct current sensor (63A), a relay (12V/300VDC) and the like;
the control module is used for managing and controlling the power supply, the core device is a control board card, and the control board card uses an STM32 chip;
the lithium battery module is used for storing and discharging energy, and the lithium battery uses a lithium iron phosphate battery;
the three-phase 380V mains supply is converted into high-voltage direct current through the rectifier module, high-voltage direct current is transmitted to a load through the bypass module through the direct current bus, and meanwhile the lithium battery module is also interconnected with the direct current micro-grid and the bypass module through the direct current bus.
When the commercial power is normal, the load is supplied with power by the commercial power through the rectifying module, when the commercial power is cut off or the rectifying module fails, the load is directly supplied with power by the lithium battery module connected in parallel on the bus, or the load is controlled by the control module, the load is connected into the direct-current micro-grid, and the micro-grid supplies power to the load, or the system supplies power to other equipment on the micro-grid through the direct-current micro-grid. The system adopts a standard deployment mode of a distributed system:
the distributed system adopts high-voltage direct-current output and is distributed in the racks of all power receiving ends as required, and all the distributed systems are connected through copper core cables and communication cables to form an energy micro-grid:
the AC input cable of the system comes from the first cabinet;
the direct current micro-grid buses (positive and negative) of the system are converged through the bus bar of the column head cabinet;
the load output of the system is directly connected to the PDU of the IT rack in which the system is positioned;
the system forms interconnection with the management system through Ethernet;
the system working mode is as follows:
when the power supply of the current cabinet is independently used as the power supply of the cabinet in normal work, when the power supply of one cabinet is in failure or overloaded, the control module controls the system to designate a standby distributed system to supply power for the failed cabinet.
When more than one distributed system fails or is overloaded, the system firstly judges whether the standby distributed system can provide enough electric quantity, and if not, a power supply with low load needs to be called to supply power for the failure cabinet.
The structure of the microgrid is shown in fig. 4. In the figure, 4 distributed high-voltage direct-current power supply system hosts are respectively installed in four cabinets and independently supply power to the equipment of the local cabinet, a red main line is an alternating-current bus, a blue main line is a direct-current micro-grid bus (colors cannot be seen in the figure because the attached drawing of the specification is only a gray scale figure), and all the distributed high-voltage direct-current power supply systems are connected to the direct-current bus through a circuit (the distributed high-voltage direct-current power supply systems cannot be connected at ordinary times and are controlled to be connected with the direct-current bus when.
And (3) fault occurrence processing:
fig. 5 is a schematic diagram of a situation where a fault/maintenance/ac power failure occurs in a certain distributed system, and a control module monitors that the distributed high-voltage dc power supply system has a fault;
in fig. 6, the connection between the faulty distributed system and the microgrid bus is changed to a solid line, which indicates that the control module commands the distributed high-voltage direct-current power supply system to access the microgrid to obtain electric energy from the microgrid. (the same processing method is adopted when a certain system runs in an overload state, and other systems share the load.)
The present invention provides a distributed micro-grid power supply system, and a method and a way for implementing the technical scheme are many, and the above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (9)
1. A distributed micro-grid power supply system is characterized by comprising a power supply module and a lithium battery module;
the power supply module comprises a rectification module, a control module and a bypass module;
the rectification module is used for realizing the conversion between alternating current and direct current; the control module is used for managing and controlling the power supply;
the lithium battery module is used for storing and discharging energy;
the three-phase 380V commercial power is converted into high-voltage direct current through the rectifier module, high-voltage direct current is transmitted to a load through the direct current bus and the bypass module, and meanwhile the lithium battery module is also interconnected with the direct current micro-grid and the bypass module through the direct current bus;
when the commercial power is normal, the load is supplied with power by the commercial power through the rectifying module, when the commercial power is cut off or the rectifying module fails, the load is directly supplied with power by the lithium battery module connected in parallel on the bus, or the load is controlled by the control module, the load is connected into the direct-current micro-grid, and the micro-grid supplies power to the load, or the system supplies power to other equipment on the micro-grid through the direct-current micro-grid.
2. The system of claim 1, wherein the rectification module is an AC/DC module with adjustable AC voltage input and DC voltage output, and the rectification module is digitally controlled by a DSP.
3. The system of claim 2, wherein the control module performs unified processing on the whole machine operation data transmitted back from the lithium battery module, the rectifying module and the bypass module, and communicates with the management server through an SNMP protocol to complete related operation measurement work and control operation.
4. The system of claim 3, wherein the control module comprises a control board and a control module housing, and is capable of reflecting the operating status of the module.
5. The system of claim 4, wherein the internal strong current circuit of the lithium battery module is connected in parallel with the output of the rectifying module; the lithium battery module is communicated with the control module through the CAN interface, transmits battery information and obtains control information.
6. The system of claim 5, wherein the bypass module is built-in with microgrid switch closure detection and load current and microgrid current sensors capable of performing switch closure detection and current measurement; after the micro-grid switch is manually closed, the load of the system is connected with the micro-grid, and after the closing signal is detected by the control module, corresponding control operation is carried out through the control module.
7. The system of claim 6, wherein the bypass module is an interface module that is separately removable when equipment is replaced, leaving the load output unaffected;
the bypass module is used for communicating a load with the high-voltage direct-current micro-grid when equipment is maintained or replaced, and the bypass module is interconnected with other modules through an internal strong current loop.
8. The system of claim 7, wherein there are N, distributed among N cabinets, the rectifier module, the control module, the battery module and the bypass module support hot plugging, the system uses high voltage dc output, and when the system operates with 240VDC, the system in each cabinet supplies power to the cabinet.
9. The system of claim 8, wherein the control module performs big data analysis according to the collected data, intelligently schedules power resources among the cabinets, and if one system fails or is overloaded, the control module first determines whether the standby system can provide enough power, and if so, the control module directly uses the standby system to supply power, and if not, the control module calls the system with low load to supply power to the failed cabinet.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113867618A (en) * | 2020-06-30 | 2021-12-31 | 华为技术有限公司 | Resource scheduling method, device, equipment, system and medium for energy storage equipment pool |
| CN113949149A (en) * | 2020-06-30 | 2022-01-18 | 超聚变数字技术有限公司 | Data center control method and control system |
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| CN108429336A (en) * | 2018-04-02 | 2018-08-21 | 郑州云海信息技术有限公司 | A kind of data center and its method of supplying power to |
| CN108448564A (en) * | 2018-05-23 | 2018-08-24 | 郑州云海信息技术有限公司 | A kind of micromodule data center distributive high-voltage direct current power supply system |
| CN209626985U (en) * | 2018-09-27 | 2019-11-12 | 北京凯华网联新能源技术有限公司 | Communication base station multichannel based on competition mechanism uses battery manager with |
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2019
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Patent Citations (3)
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| CN108429336A (en) * | 2018-04-02 | 2018-08-21 | 郑州云海信息技术有限公司 | A kind of data center and its method of supplying power to |
| CN108448564A (en) * | 2018-05-23 | 2018-08-24 | 郑州云海信息技术有限公司 | A kind of micromodule data center distributive high-voltage direct current power supply system |
| CN209626985U (en) * | 2018-09-27 | 2019-11-12 | 北京凯华网联新能源技术有限公司 | Communication base station multichannel based on competition mechanism uses battery manager with |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113867618A (en) * | 2020-06-30 | 2021-12-31 | 华为技术有限公司 | Resource scheduling method, device, equipment, system and medium for energy storage equipment pool |
| WO2022001307A1 (en) * | 2020-06-30 | 2022-01-06 | 华为技术有限公司 | Method and apparatus for scheduling resource in energy storage device pool, device, system, and medium |
| CN113949149A (en) * | 2020-06-30 | 2022-01-18 | 超聚变数字技术有限公司 | Data center control method and control system |
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Application publication date: 20200424 |