Flexible power supply system and power supply method for direct-current data center

Abstract

The invention discloses a direct-current data center flexible power supply system and a power supply method, and belongs to the technical field of data center power supply. The system comprises a direct-current power supply, a backup power supply, a server, a power supply main circuit and a power supply bypass; the power supply bypass is provided with a first DC / DC converter, one end of the first DC / DC converter is connected with the DC power supply, and the other end is connected with the backup power supply; the direct-current power supply is connected with the server through the power supply main circuit and is used for supplying power to the server through the power supply main circuit and charging the backup power supply through the first DC / DC converter in a normal power supply mode; and the backup power supply is connected with the server through the power supply bypass and is used for supplying power to the server through the power supply bypass in the backup power supply mode. Through the reasonable topological structure design, the power supply conversion efficiency is improved, unnecessary energy loss is reduced, the requirement for the capacity of the converter is reduced, the overall power supply efficiency and reliability of the system are effectively improved, and the equipment cost is reduced.

Description

Technical Field

[0001] The invention relates to a flexible power supply system and a power supply method for a direct current data center, and belongs to the technical field of power supply for data centers. Background Art

[0002] With the rapid development of modern power systems and information technology, especially in the fields of renewable energy integration, electric vehicle charging stations, and data centers, the requirements for power distribution methods are gradually increasing. Traditional AC distribution systems involve multi-level AC-DC conversion, resulting in low energy conversion efficiency, complex system architecture, and high equipment maintenance and operating costs, making it difficult to meet the needs of efficient and reliable power supply. In order to address these problems, DC distribution technology, as a new type of power distribution method, is being valued and applied in more and more application scenarios.

[0003] Data centers are typical application scenarios for DC power distribution technology, with the main loads including IT equipment loads and air conditioning loads. Since most IT equipment uses DC power supply, the use of DC power distribution technology can reduce the multi-stage AC-DC conversion link, thereby improving power transmission efficiency and reducing the overall power loss of the system. Existing DC data center high-voltage DC power supply topology, such as Figure 1 As shown in the figure, the high-voltage DC power supply is the core, and the system includes a DC power supply, a DC / DC converter located in the main power supply circuit, and a backup power battery. In the existing high-voltage DC power supply topology, the DC / DC converter needs to power the server and the backup battery at the same time, which places high requirements on the capacity of the converter. Moreover, since the DC power supply powers the server through the DC / DC converter, the loss in the power conversion process is increased, and the overall power supply efficiency of the system is reduced. Therefore, how to optimize the existing DC power supply topology, reduce the capacity requirements of the DC / DC converter, reduce power loss, and simplify the operation and maintenance process of the system has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a flexible power supply system and power supply method for a DC data center, which improves the power conversion efficiency, reduces unnecessary energy loss, reduces the demand for converter capacity, effectively improves the overall power supply efficiency and power supply reliability of the system, and reduces equipment costs through reasonable topology structure design and power supply method control.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions.

[0006] In a first aspect, the present invention provides a DC data center flexible power supply system, including a DC power supply, a backup power supply, a server, a main power supply circuit, and a power supply bypass circuit; The power supply bypass is provided with a first DC / DC converter, one end of the first DC / DC converter is connected to the DC power supply, and the other end is connected to the backup power supply; The DC power supply is connected to the server through a main power supply path, and the DC power supply is used to power the server through the main power supply path in a normal power supply mode, and to charge the backup power supply through a first DC / DC converter; The backup power supply is connected to the server via a power supply bypass, and the backup power supply is used to supply power to the server via the power supply bypass in a backup power supply mode.

[0007] Furthermore, the main power supply circuit is provided with a first check diode located between the DC power supply and the server. The first check diode is used to prevent the current of the backup power supply from flowing back to the DC power grid, avoid system instability or energy waste caused by power backflow, and ensure that the DC power supply continuously and stably supplies power to the server.

[0008] Furthermore, the power supply bypass is provided with a second check diode located between the backup power supply and the server. The second check diode is used to prevent the DC power supply from unnecessarily charging the backup power supply through the power supply bypass when the voltage of the main power supply is higher than the voltage of the backup power supply, thereby optimizing the power supply efficiency.

[0009] Furthermore, a first switch is provided at one end of the main power supply circuit close to the DC power supply, and a second switch is provided at one end of the main power supply circuit close to the server.

[0010] Furthermore, the server includes a server power supply connected to the main power supply circuit, and a second DC / DC converter is provided in the server power supply.

[0011] Furthermore, the server also includes a server mainboard, and one end of the second DC / DC converter is connected to the main power supply circuit, and the other end is connected to the server mainboard.

[0012] Furthermore, the backup power supply is a battery, the equalization charging voltage of the battery is lower than the voltage of the DC power supply, the termination voltage of the battery is higher than the lowest voltage of the server, and the voltage of the DC power supply is lower than the highest tolerance voltage of the server.

[0013] In a second aspect, a DC data center flexible power supply method is provided, comprising: When the DC power supply can supply power and the supply voltage is higher than the floating charge voltage of the backup power supply, the normal power supply mode is entered, and the DC power supply supplies power to the server through the main power supply path, and charges the backup power supply through the first DC / DC converter in the power supply bypass path; When the supply voltage of the DC power supply is lower than the floating charge voltage of the backup power supply or the DC power supply fails, it switches to the backup power supply mode, and the backup power supply supplies power to the server through the power supply bypass.

[0014] Furthermore, the main power supply circuit is provided with a first check diode located between the DC power supply and the server; in normal power supply mode, the DC power supply supplies power to the server through the main power supply circuit and the first check diode in the main power supply circuit.

[0015] Furthermore, the power supply bypass is provided with a second check diode located between the backup power supply and the server; in the backup power supply mode, the backup power supply supplies power to the server through the power supply bypass and the second check diode in the power supply bypass.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The DC data center flexible power supply system provided by the present invention includes a DC power supply, a backup power supply, a server, a main power supply circuit and a power supply bypass. The power supply bypass is provided with a first DC / DC converter, one end of the first DC / DC converter is connected to the DC power supply, and the other end is connected to the backup power supply; in normal power supply mode, the DC power supply directly supplies power to the server through the main power supply circuit, and charges the backup power supply through the first DC / DC converter to maintain the full capacity state of the backup power supply. The DC / DC converter design in the prior art is omitted in the main power supply circuit, which improves the power conversion efficiency and reduces unnecessary energy loss. At the same time, the DC / DC converter located in the bypass only supplies power to the backup power supply, so the demand for converter capacity is greatly reduced, effectively reducing the equipment cost; when the supply voltage of the DC power supply is lower than the floating charge voltage of the backup power supply or the DC power supply fails, the system automatically switches to the backup power supply mode, and the backup power supply supplies power to the server through the power supply bypass, ensuring that the power supply to the server is not interrupted, thereby improving the overall power supply efficiency and power supply reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a DC data center power supply system in the prior art; Figure 2 A schematic diagram of the structure of a DC data center flexible power supply system provided in an embodiment of the present invention; Figure 3 Schematic diagram of power transmission direction in a normal power supply mode in an embodiment of the present invention; Figure 4 Schematic diagram of power transmission direction in a backup power supply mode in an embodiment of the present invention.

[0018] The markings in the figure are: 1. DC power supply; 2. Server power supply; 3. Backup power supply; 4. First check diode; 5. First DC / DC converter; 6. Second check diode; 7. Main power supply line; 8. Power supply bypass; 9. First switch; 10. Second switch; 11. Second DC / DC converter; 12. Server mainboard. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0020] The term "and / or" is only a way to describe the association relationship of related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the related objects are in an "or" relationship.

[0021] Example 1

[0022] like Figure 2 As shown, this embodiment introduces a DC data center flexible power supply system, including a DC power supply 1, a backup power supply 3, a server, a main power supply circuit 7 and a bypass power supply 8; the main power supply circuit 7 is connected between the DC power supply 1 and the server, and a first check diode 4 is provided on the main power supply circuit 7; the bypass power supply 8 is arranged on both sides of the first check diode 4 of the main power supply circuit 7, and a first DC / DC converter 5 and a second check diode 6 are provided on the bypass power supply 8 in sequence, one end of the first DC / DC converter 5 is connected to the main power supply circuit 7, and then connected to the DC power supply 1, the other end of the first DC / DC converter 5 is connected to the backup power supply 3, and the second check diode 6 is located between the backup power supply 3 and the server.

[0023] The DC power supply 1 is connected to the server through the main power supply path 7 and the first check diode 4 in the main power supply path 7. The DC power supply 1 is used to supply power to the server through the main power supply path 7 and the first check diode 4 in the main power supply path 7 in the normal power supply mode. At this time, the DC power supply 1 serves as the main power supply of the server to ensure that the server is continuously and stably powered under normal working conditions. This voltage value is accurately selected to meet the voltage requirements of the server and ensure the stability and reliability of the power supply. While supplying power to the server, the DC power supply 1 charges the backup power supply 3 through the first DC / DC converter 5 to ensure that the backup power supply 3 always maintains full capacity in the floating charge state, so as to provide immediate power support in an emergency and ensure that the server does not experience power interruption when the power is cut off. The first check diode 4 is used to prevent the current of the backup power supply 3 from flowing back to the DC power grid, avoid system instability or energy waste caused by power backflow, and ensure that the DC power supply 1 continuously and stably supplies power to the server.

[0024] The backup power supply 3 is connected to the server through the power supply bypass 8 and the second check diode 6 in the power supply bypass 8. When the supply voltage of the DC power supply 1 is lower than the floating charge voltage of the backup power supply 3 or the DC power supply fails, the system will switch to the backup power supply mode. The backup power supply 3 is used to supply power to the server through the power supply bypass 8 and the second check diode 6 in the power supply bypass 8 in the backup power supply mode to ensure continuous power supply to the server. The second check diode 6 is used to prevent the DC power supply 1 from unnecessarily charging the backup power supply 3 through the power supply bypass 8 when the voltage of the main power supply 7 is higher than the voltage of the backup power supply 3, thereby optimizing the power supply efficiency.

[0025] In this embodiment, a first switch 9 is provided at one end of the main power supply circuit 7 close to the DC power supply 1, and a second switch 10 is provided at one end of the main power supply circuit 7 close to the server. The first switch 9 and the second switch 10 are used to control the on and off of the power supply.

[0026] In this embodiment, the server includes a server power supply 2 connected to the main power supply circuit 7, and a second DC / DC converter 11 is provided in the server power supply 2. The server also includes a server motherboard 12, and one end of the second DC / DC converter 11 is connected to the main power supply circuit 7, and the other end is connected to the server motherboard 12.

[0027] In this embodiment, the backup power supply 3 is a battery, the equalization charging voltage of the battery is lower than the voltage of the DC power supply 1, the termination voltage of the battery is higher than the lowest voltage of the server, and the voltage of the DC power supply 1 is lower than the highest tolerance voltage of the server.

[0028] Example 2

[0029] Based on the same inventive concept as that of Example 1, this embodiment introduces a DC data center flexible power supply method, including: When the DC power supply can supply power and the supply voltage is higher than the floating charge voltage of the backup power supply, the normal power supply mode is entered. The DC power supply supplies power to the server through the main power supply circuit and the first non-reverse diode in the main power supply circuit, and charges the backup power supply through the first DC / DC converter in the power supply bypass to maintain the backup power supply in a full-capacity standby state. At this time, the backup power supply does not participate in the power supply, and the power transmission direction is as follows: Figure 3 As shown; When the supply voltage of the DC power supply is lower than the floating charge voltage of the backup power supply or the DC power supply fails, the system automatically switches to the backup power supply mode. The backup power supply supplies power to the server through the power supply bypass and the second non-reverse diode in the power supply bypass to ensure that the server power supply is not interrupted, thereby improving the reliability of the backup power supply. The power transmission direction is as follows: Figure 4 shown.

[0030] Example 3

[0031] This embodiment provides a practical application scenario of the DC data center flexible power supply system described in Example 1, using a server model FusionServer 5885H V6 (with a voltage range of 260V-400V). A 375V DC power supply is used to power the server. Considering that the output voltage fluctuation range of the transformer is ±2%, the actual output voltage range is 367.5V to 382.5V. In order to ensure that the voltage of the backup power supply battery in the equalization and floating charge states meets the system requirements, 26 series-connected battery packs are selected as backup power supplies. The equalization voltage of each battery is 14.1V, the floating charge voltage is 13.5V, and the termination voltage is 10.8V. According to calculations, the equalization voltage of the 26 batteries connected in series is 366.6V, the floating charge voltage is 351V, and the termination voltage is 280.8V. The above battery voltage configuration fully meets the working requirements of the system.

[0032] In summary, according to the above embodiments, the present invention designs two power supply links based on the adaptability of the server to the wide voltage range characteristics, which are used for DC power supply and backup power supply management respectively. Through this configuration, the data center server can flexibly switch the power supply link according to different working conditions to ensure the high efficiency and flexibility of power supply. Specifically, in the normal power supply mode, the server is directly powered by the DC power supply, and the DC / DC converter in the main power supply circuit can be omitted, thereby improving the power conversion efficiency and reducing unnecessary energy loss. At the same time, since the DC / DC converter located in the bypass only supplies power to the backup power supply, the demand for converter capacity is greatly reduced, effectively reducing the equipment cost. When the supply voltage of the DC power supply is lower than the floating charge voltage of the backup power supply or the DC power supply fails, it switches to the backup power supply mode, and the backup power supply supplies power to the server through the power supply bypass, ensuring that the server power supply is uninterrupted, and improving the overall power supply efficiency and power supply reliability of the system.

[0033] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0034] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0035] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0036] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0037] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

Claims

1. A DC data center flexible power supply system, characterized in that: Including DC power supply, backup power supply, server, main power supply and bypass power supply; The power supply bypass is provided with a first DC / DC converter, one end of the first DC / DC converter is connected to the DC power supply, and the other end is connected to the backup power supply; The DC power supply is connected to the server through a main power supply path, and the DC power supply is used to power the server through the main power supply path in a normal power supply mode, and to charge the backup power supply through a first DC / DC converter; The backup power supply is connected to the server via a power supply bypass, and the backup power supply is used to supply power to the server via the power supply bypass in a backup power supply mode.

2. The DC data center flexible power supply system according to claim 1 is characterized in that: The main power supply circuit is provided with a first check diode located between the DC power supply and the server.

3. The DC data center flexible power supply system according to claim 1 is characterized in that: The power supply bypass is provided with a second check diode located between the backup power supply and the server.

4. The DC data center flexible power supply system according to claim 1, characterized in that: A first switch is provided at one end of the main power supply circuit close to the DC power supply, and a second switch is provided at one end of the main power supply circuit close to the server.

5. The DC data center flexible power supply system according to claim 1, characterized in that: The server comprises a server power supply connected to the main power supply circuit, and a second DC / DC converter is arranged in the server power supply.

6. The DC data center flexible power supply system according to claim 5, characterized in that: The server further includes a server mainboard. One end of the second DC / DC converter is connected to the main power supply circuit, and the other end is connected to the server mainboard.

7. The DC data center flexible power supply system according to claim 1, characterized in that: The backup power supply is a battery, the equalization charging voltage of the battery is lower than the voltage of the DC power supply, the termination voltage of the battery is higher than the lowest voltage of the server, and the voltage of the DC power supply is lower than the highest tolerance voltage of the server.

8. A DC data center flexible power supply method, characterized in that: include: When the DC power supply can supply power and the supply voltage is higher than the floating charge voltage of the backup power supply, the normal power supply mode is entered, and the DC power supply supplies power to the server through the main power supply path, and charges the backup power supply through the first DC / DC converter in the power supply bypass path; When the supply voltage of the DC power supply is lower than the floating charge voltage of the backup power supply or the DC power supply fails, it switches to the backup power supply mode, and the backup power supply supplies power to the server through the power supply bypass.

9. The DC data center flexible power supply method according to claim 8, characterized in that: The main power supply circuit is provided with a first check diode located between the DC power supply and the server; in a normal power supply mode, the DC power supply supplies power to the server through the main power supply circuit and the first check diode in the main power supply circuit.

10. The DC data center flexible power supply method according to claim 8, characterized in that: The power supply bypass is provided with a second check diode located between the backup power supply and the server; in the backup power supply mode, the backup power supply supplies power to the server through the power supply bypass and the second check diode in the power supply bypass.

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