A power supply system and method

Abstract

This application discloses a power supply system and method, comprising N uninterruptible power supply (UPS) systems and N-1 static transfer switches, where N ≥ 3; the N UPS systems include N-1 primary UPS systems and one backup UPS system; the N-1 primary UPS systems correspond one-to-one with the N-1 static transfer switches; the output terminal of any primary UPS system is connected to the corresponding static transfer switch; the output terminals of the backup UPS systems are connected one-to-one with the N-1 static transfer switches. By controlling at least two STSs connected to the same load device, since each STS is always connected to a primary UPS and a backup UPS, when one of the at least two STSs experiences an anomaly in its primary UPS, the backup UPS can still provide power to that STS, thus ensuring the power supply redundancy of the load device in this state.

Description

Technical Field

[0001] This application relates to the field of power supply and distribution management technology, and in particular to a power supply system and method. Background Technology

[0002] With the continuous development of the economy, the amount of financial data held by major financial enterprises is increasing daily. In the process of using data centers to store, process, and apply massive amounts of financial data, building a stable and reliable power supply system will provide strong support for the normal operation of the enterprise.

[0003] Currently, the architecture of existing power supply systems is mainly divided into three types: 2N architecture, DR (Distribution Redundancy) architecture, and RR (Reserve Redundancy) architecture. For example... Figure 1 The diagram shown is a schematic of a 2N architecture power supply system provided by existing technology. Figure 2 The diagram shown is a schematic of a power supply system for a DR architecture provided by existing technology. Figure 3 The diagram shown is a schematic of a power supply system based on the RR architecture provided by existing technology. Wherein:

[0004] See Figure 1 In a 2N architecture, two power supply units are used, each capable of meeting the power needs of all load devices. These two units are configured to operate simultaneously, serving as backups for each other. Specifically, during normal operation, each power supply unit provides 50% of the power to the load devices; if one power supply unit fails, the other provides 100% of the power. Therefore, in scenarios where a power supply unit fails, the load devices will be powered by only one unit, which clearly fails to meet the requirement for redundant power supply.

[0005] See Figure 2 In a DR (Remote Distribution) architecture, it consists of N (N≥3) identically configured UPS (Uninterruptible Power Systems), all operating simultaneously. Downstream load devices are divided into N groups, with each UPS supplying power to its own group and adjacent groups, forming a daisy-chain power supply. When one UPS fails, its corresponding load device will be powered by a neighboring UPS. However, this results in downstream load devices being powered by only one UPS, failing to achieve redundant power supply and reducing the stability of the power supply system.

[0006] See Figure 3In a reverse rotation (RR) architecture, multiple UPS units are used, with one UPS serving as a backup for the others. Multiple STS (Static Transfer Switches) are employed at the end of the power distribution system for power switching. This allows the backup UPS to power downstream loads connected to the failed primary UPS when one primary UPS fails. However, this results in downstream loads being powered by only one UPS, failing to achieve redundant power supply and reducing the stability of the power supply system.

[0007] The UPS, which is prone to failure when malfunctioning, cannot provide redundant power to the load devices in the power supply systems formed by the above three architectures, which will seriously affect the stability of the data center using the power supply system.

[0008] Therefore, there is an urgent need for a power supply system in which the load equipment is always powered by at least two different UPSs, thereby improving the stability of data centers using this power supply system. Summary of the Invention

[0009] This application provides a power supply system and method to ensure that the load device is always powered by at least two different UPSs, thereby guaranteeing the redundancy of power supply to the load device in the event of UPS failure.

[0010] In a first aspect, embodiments of this application provide a power supply system comprising: N uninterruptible power supply (UPS) systems and N-1 static transfer switches, where N ≥ 3; the N UPS systems include N-1 primary UPS systems and one backup UPS system; each of the N-1 primary UPS systems corresponds one-to-one with one of the N-1 static transfer switches; the output terminal of any primary UPS system is connected to the corresponding static transfer switch; the output terminals of the backup UPS systems are connected one-to-one with each of the N-1 static transfer switches; and at least two of the N-1 static transfer switches have their output terminals connected to the same load device.

[0011] In the above scheme, the power supply system is configured with an architecture of N UPS and N-1 static transfer switches. One of the N UPS is configured as a shared backup UPS for the other N-1 main UPSs. Each of the N-1 main UPSs is connected to a corresponding STS, and the backup UPS is connected to one of the N-1 STSs. Finally, at least two of the N-1 STSs are connected to the same load device. Because at least two STSs are connected to the same load device, and each STS is always connected to both a main UPS and a backup UPS, if one of the main UPSs connected to one of the at least two STSs fails, the backup UPS can still provide power to that STS, thus ensuring power redundancy for the load device in this state.

[0012] In one possible implementation, the power supply system includes a first primary uninterruptible power supply (UPS), a second primary UPS, and a backup UPS; wherein a first circuit breaker is installed on the connection line between the first primary UPS and its corresponding first static transfer switch; a second circuit breaker is installed on the connection line between the backup UPS and its corresponding second static transfer switch; a third circuit breaker is installed on the connection line between the second primary UPS and its corresponding second static transfer switch; and a fourth circuit breaker is installed on the connection line between the backup UPS and its corresponding first static transfer switch; the first circuit breaker and the second circuit breaker are electrically interlocked, and the third circuit breaker and the fourth circuit breaker are also electrically interlocked.

[0013] In the above scheme, taking N=3 as an example, that is, the power supply system includes a first main UPS, a second main UPS, and a backup UPS, illustrating the implementation of power supply redundancy for the load equipment. Specifically, a first circuit breaker is installed on the connection line between the first main UPS and its corresponding first STS; a second circuit breaker is installed on the connection line between the backup UPS and the second UPS's corresponding second STS; a third circuit breaker is installed on the connection line between the second main UPS and its corresponding second STS; and a fourth circuit breaker is installed on the connection line between the backup UPS and the first main UPS's corresponding first STS. Furthermore, by configuring the first and second circuit breakers and the third and fourth circuit breakers to be electrically interlocked, a power supply redundancy is achieved when the power distribution link where the first main UPS is located fails or needs to be re-established. During maintenance, the first circuit breaker will trip and disconnect, and the first STS will automatically switch to the backup UPS for power supply. At the same time, due to electrical interlocking, the second circuit breaker will automatically trip and disconnect, thus ensuring the capacity safety of the power distribution link where the backup UPS is located. If the first and second circuit breakers are not configured with electrical interlocking, the second circuit breaker will not be able to trip and disconnect automatically in this state. In this case, if a problem occurs in the power distribution link where the second main UPS is located, the power distribution link where the backup UPS is located, as the only one with power supply capability, will be unable to supply power to the load equipment, which can easily lead to power supply abnormalities and damage to the load equipment.

[0014] In one possible implementation, the first circuit breaker, the second circuit breaker, the third circuit breaker, and the fourth circuit breaker are all equipped with undervoltage tripping function and are initially set to the closed state.

[0015] In the above scheme, taking N=3 as an example, that is, the power supply system includes a first main UPS, a second main UPS, and a backup UPS, illustrating the implementation of power supply redundancy for the load equipment. Since a first circuit breaker, a second circuit breaker, a third circuit breaker, and a fourth circuit breaker are introduced, these four circuit breakers will be set to the closed state when the power supply system is officially started. Simultaneously, because the first STS is configured to select the power distribution link where the first main UPS (where the first circuit breaker is located) is located to supply power to the load equipment when the power supply system is in a normal state, the first STS is also configured to select the power distribution link where the backup UPS is located to supply power to the load equipment when the power distribution link where the first main UPS is located is abnormal. When the power supply system returns to normal, the first STS will automatically switch back from the backup UPS to the primary UPS. The second STS is configured to select the power distribution link of the primary UPS where the third circuit breaker is located to supply power to the load equipment when the power supply system is in normal condition. The second STS is also configured to select the power distribution link of the backup UPS to supply power to the load equipment when the power distribution link of the primary UPS is abnormal. When the power distribution link of the primary UPS returns to normal, the second STS will automatically switch back from the backup UPS to the primary UPS. That is, the first and second STS are set to automatic transfer and automatic recovery. At this time, by configuring the four circuit breakers with undervoltage trip function, the operation of the power supply system can be realized.

[0016] In one possible implementation, a first bypass is provided outside any static transfer switch; the first bypass is located between the input terminal and the output terminal of the static transfer switch, and the first bypass is used to remove the static transfer switch when the circuit is connected.

[0017] In the above scheme, by setting a first bypass outside any STS, and setting the first bypass between the input terminal and the output terminal of the STS, the STS can be removed when the first bypass is turned on, thus achieving the effect of removing and maintaining the STS without shutting down the power supply system.

[0018] In one possible implementation, for the first static transfer switch, the first bypass includes a first sub-bypass that connects the first main uninterruptible power supply system to the first static transfer switch, and a fifth circuit breaker is provided on the first sub-bypass.

[0019] In the above scheme, by setting the first sub-bypass between the first main UPS and the first STS to conduct through the first static transfer switch, and by setting the first sub-bypass to a fifth circuit breaker, when the first STS needs to be replaced, the backup UPS can be controlled to supply power to the load device through the second STS first, then the fourth circuit breaker is set to the open state, and then the third circuit breaker will automatically trip and open based on the electrical interlock between the third and fourth circuit breakers. Finally, by closing the fifth circuit breaker on the first sub-bypass, the first main UPS can supply power to the load device through the first sub-bypass.

[0020] In one possible implementation, for the first static transfer switch, the first bypass includes a second sub-bypass connecting the backup uninterruptible power supply system to the first static transfer switch, and a sixth circuit breaker is provided on the second sub-bypass.

[0021] In the above scheme, by setting the second sub-bypass between the backup UPS and the first STS to conduct through the first static transfer switch, and by setting the sixth circuit breaker on the second sub-bypass, when the power distribution link where the first UPS is located is abnormal and the first STS needs to be replaced, the first circuit breaker can be disconnected first. Then, based on the electrical interlock between the second circuit breaker and the first circuit breaker, the second circuit breaker will automatically trip and disconnect. Finally, by closing the sixth circuit breaker on the second sub-bypass, the backup UPS can supply power to the load equipment through the second sub-bypass.

[0022] In one possible implementation, any static transfer switch is provided with a second bypass; the second bypass is used to perform maintenance on the static transfer switch when the circuit is open.

[0023] In the above scheme, by setting a second bypass inside any STS, the STS can be directly inspected when the second bypass is turned on, thus achieving the effect of direct inspection of the STS without shutting down the power supply system.

[0024] Secondly, embodiments of this application provide a power supply method applicable to the power supply system described in any of the first aspects above. The power supply method includes: when any primary uninterruptible power supply system is in a working state, it supplies power to the load device through a static transfer switch corresponding to the primary uninterruptible power supply system; if the first primary uninterruptible power supply system is in an abnormal state, a backup uninterruptible power supply system supplies power to the load device through a static transfer switch corresponding to the first primary uninterruptible power supply system; the first primary uninterruptible power supply system is any one of N-1 primary uninterruptible power supply systems.

[0025] In the above scheme, since at least two STSs are connected to the same load device, and each STS is always connected to a main UPS and a backup UPS, when one of the at least two STSs is connected to a main UPS that fails, the STS can still be powered by the backup UPS, thus ensuring the power supply redundancy of the load device in this state.

[0026] In one possible implementation, if the first primary uninterruptible power supply system is in an abnormal state, the first circuit breaker trips and opens; based on the electrical interlocking state of the first and second circuit breakers, the second circuit breaker is in an open state.

[0027] In the above scheme, by setting the first circuit breaker and the second circuit breaker to an electrical interlock state, when the power distribution link where the first main UPS is located fails to supply power due to an anomaly, the first circuit breaker will automatically trip and open. At the same time, based on the electrical interlock state between the second circuit breaker and the first circuit breaker, the second circuit breaker will also automatically trip and open. This ensures the power supply safety of the load equipment by the second main UPS and the backup UPS. If the electrical interlock function between the first and second circuit breakers is not set, when the power distribution link where the first main UPS is located fails to supply power due to an anomaly, only the first circuit breaker will automatically trip and open, while the second circuit breaker will not open. Therefore, during the process of redundant power supply to the load equipment by the second main UPS and the backup UPS, if the power distribution link where the second main UPS is located fails to supply power, the third circuit breaker will automatically trip and open, resulting in a situation where only the backup UPS supplies power to the load equipment. In this case, the backup UPS will be unable to meet the power supply demand of the load equipment, which could easily lead to the collapse of the power supply system and endanger the load equipment. Therefore, by setting an electrical interlock function between the first circuit breaker and the second circuit breaker, the safety of the power supply system during operation can be greatly improved.

[0028] In one possible implementation, when the first static transfer switch corresponding to the first primary uninterruptible power supply system is replaced, the backup uninterruptible power supply system supplies power to the load device through the second static transfer switch; the fourth circuit breaker between the backup uninterruptible power supply system and the first static transfer switch is set to the open state; based on the electrical interlocking state between the third circuit breaker and the fourth circuit breaker, the third circuit breaker is in the open state; the fifth circuit breaker is closed, thereby the first primary uninterruptible power supply system supplies power to the load device through the first sub-bypass.

[0029] In the above scheme, by setting the first sub-bypass between the first main UPS and the first STS to conduct through the first static transfer switch, and by setting the first sub-bypass to a fifth circuit breaker, when the first STS needs to be replaced, the backup UPS can be controlled to supply power to the load device through the second STS first, then the fourth circuit breaker is set to the open state, and then the third circuit breaker will automatically trip and open based on the electrical interlock between the third and fourth circuit breakers. Finally, by closing the fifth circuit breaker on the first sub-bypass, the first main UPS can supply power to the load device through the first sub-bypass.

[0030] In one possible implementation, when the first static transfer switch corresponding to the first primary uninterruptible power supply system is replaced and the first active uninterruptible power supply system malfunctions, the first circuit breaker is disconnected; based on the electrical interlock between the second circuit breaker and the first circuit breaker, the second circuit breaker is in the open state; the sixth circuit breaker is closed, so that the backup uninterruptible power supply system supplies power to the load device through the second sub-bypass.

[0031] In the above scheme, by setting the second sub-bypass between the backup UPS and the first STS to conduct through the first static transfer switch, and by setting the sixth circuit breaker on the second sub-bypass, when the power distribution link where the first UPS is located is abnormal and the first STS needs to be replaced, the first circuit breaker can be disconnected first. Then, based on the electrical interlock between the second circuit breaker and the first circuit breaker, the second circuit breaker will automatically trip and disconnect. Finally, by closing the sixth circuit breaker on the second sub-bypass, the backup UPS can supply power to the load equipment through the second sub-bypass.

[0032] Thirdly, embodiments of this application provide a computing device, including:

[0033] Memory, used to store program instructions;

[0034] A processor is configured to invoke program instructions stored in the memory and execute any implementation method of the second aspect according to the obtained program.

[0035] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform any implementation method as described in the second aspect. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of a 2N architecture power supply system provided for existing technologies;

[0038] Figure 2 A schematic diagram of a power supply system for a DR architecture provided by the prior art;

[0039] Figure 3 A schematic diagram of a power supply system based on the RR architecture provided for existing technology;

[0040] Figure 4 A schematic diagram of a power supply system provided in an embodiment of this application;

[0041] Figure 5 A schematic diagram of a power supply system provided in an embodiment of this application;

[0042] Figure 6 A schematic diagram of a power supply system provided in an embodiment of this application;

[0043] Figure 7 A schematic diagram of another power supply system provided in the embodiments of this application;

[0044] Figure 8 A schematic diagram of a power supply system provided in an embodiment of this application;

[0045] Figure 9 A schematic diagram of a power supply system provided in an embodiment of this application;

[0046] Figure 10 This is a schematic diagram of a computing device provided in an embodiment of this application. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] For current 2N, RR, and DR power supply systems, when an anomaly occurs in the power distribution link of one UPS, the load devices connected to that UPS will only be powered by one power source, which obviously cannot meet the requirements of power supply redundancy.

[0049] To address the aforementioned technical problems, embodiments of this application provide a power supply system, which includes:

[0050] There are N uninterruptible power supply systems and N-1 static transfer switches, where N ≥ 3; the N uninterruptible power supply systems include N-1 primary uninterruptible power supply systems and one backup uninterruptible power supply system;

[0051] The N-1 primary uninterruptible power supply systems correspond one-to-one with the N-1 static transfer switches; the output terminal of any primary uninterruptible power supply system is connected to the corresponding static transfer switch; the output terminal of each backup uninterruptible power supply system is connected to one-to-one with the N-1 static transfer switches.

[0052] At least two of the N-1 static transfer switches have their output terminals connected to the same load device.

[0053] For the power supply system described above, it can be achieved through... Figure 4 The architecture diagram shown is used for illustration. For example... Figure 4 The diagram shown is a schematic of a power supply system provided in an embodiment of this application, where N = 3.

[0054] See Figure 4 The power distribution link for the UPS in column A includes mains power line A, transformer 1, and the UPS in column A. The power distribution link for the UPS in column B includes mains power line B, transformer 2, and the UPS in column B. The power distribution link for column C includes mains power line C, transformer 3, and the UPS in column C.

[0055] If we consider column A as a primary UPS and column C as a primary UPS, then column B will serve as a backup UPS for both column A and column C.

[0056] Furthermore, since the connection relationship between the main UPS and the STS is one-to-one, we can set the output of the UPS in column A to be connected to STS1, the output of the UPS in column C to be connected to STS2, and so on. In this way, the output of the UPS in column B will be connected to both STS1 and STS2.

[0057] like Figure 4 As shown, assuming Figure 4The power supply system shown can supply power to four load devices, which are named load device 1, load device 2, load device 3 and load device 4 respectively. The output of STS1 will be connected to load device 1, load device 2, load device 3 and load device 4 at the same time, and the output of STS2 will also be connected to load device 1, load device 2, load device 3 and load device 4 at the same time.

[0058] Based on the power supply system architecture described above in this application, this application can provide a power supply method, including: when any primary uninterruptible power supply system is in a working state, it supplies power to the load device through a static transfer switch corresponding to the primary uninterruptible power supply system; if the first primary uninterruptible power supply system is in an abnormal state, the backup uninterruptible power supply system supplies power to the load device through a static transfer switch corresponding to the first primary uninterruptible power supply system; the first primary uninterruptible power supply system is any one of N-1 primary uninterruptible power supply systems.

[0059] against Figure 4 The specific usage process of the power supply method provided in this application is illustrated using only load device 1 as an example; however, the method for supplying power to other load devices can be referred to load device 1, and will not be repeated here.

[0060] For STS1, since its input terminal is connected to both the power distribution link of the main UPS (Column A) and the backup UPS (Column B), it is pre-configured to prioritize the power distribution link of the main UPS (Column A) to supply power to the load device when the power distribution link of the main UPS (Column A) is working normally. It will automatically switch to the power distribution link of the backup UPS (Column B) to supply power to the load device only when the power distribution link of the main UPS (Column A) is not working normally. When the power distribution link of the main UPS (Column A) is restored, STS1 will actively switch the power distribution link supplying power to the load device from the power distribution link of the main UPS (Column B) to the power distribution link of the main UPS (Column A). In other words, this application will configure STS1 with an automatic transfer and automatic recovery function.

[0061] For STS2, since its input is connected to both the power distribution link of the main UPS (Column C) and the backup UPS (Column B), it can be pre-configured to prioritize the power distribution link of the main UPS (Column C) to supply power to the load devices when the power distribution link of the main UPS (Column C) is working properly. If the power distribution link of the main UPS (Column C) fails to supply power, it will automatically switch to the power distribution link of the backup UPS (Column B) to supply power to the load devices. When the power distribution link of the main UPS (Column C) is restored, STS2 will actively switch the power distribution link supplying power to the load devices from the power distribution link of the main UPS (Column B) to the power distribution link of the main UPS (Column C). In other words, this application will configure STS2 with an automatic transfer and automatic recovery function.

[0062] Based on the self-transfer and self-recovery functions configured for STS1 and STS2 in this application, for load device 1, since it is connected to STS1 and STS2, where STS1 is simultaneously connected to the power distribution link of the main UPS (column A) and the backup UPS (column B), and STS2 is simultaneously connected to the power distribution link of the main UPS (column C) and the backup UPS (column B), the power supply system should supply power to load device 1 in the following two cases:

[0063] Scenario 1: If both the power distribution links of the main UPS in column A and column C can normally supply power to the load equipment, then:

[0064] STS1 can be powered by the power distribution link of the UPS in column A, and STS2 can be powered by the power distribution link of the UPS in column C. Thus, for load device 1, load device 1 will be redundantly powered by the power distribution links of the UPS in column A and the UPS in column C.

[0065] Scenario 2: If one of the power distribution links in column A (the main UPS) or column C (the main UPS) experiences an anomaly and cannot supply power to the load, and assuming the anomaly is in column A, then:

[0066] When the power distribution link of the UPS in column A connected to STS1 fails to supply power to load device 1 due to an anomaly, the STS1, with its automatic transfer and recovery function, can switch from the power distribution link of the UPS in column A to the power distribution link of the UPS in column B. This updates the two power distribution links supplying load device 1 from the original links of the UPS in columns A and C to the links of the UPS in columns B and C. Compared to the prior art, when a power distribution link of a certain UPS in the power supply system fails, the power supply to the load device can always be guaranteed to come from two different power distribution links, achieving redundant power supply to the load device under abnormal conditions and greatly improving the safety of the power supply system.

[0067] It should be noted that this application will not list the specific process by which the UPS in column C provides power to load device 1 when the power distribution link is abnormal and unable to provide power to load device 1.

[0068] Furthermore, in the 2N architecture power supply system of the background technology, considering the normal power supply requirements of the load equipment under abnormal conditions, the current system can only supply power to the load equipment at a maximum load rate of 50% by setting each power distribution link. Therefore, the energy efficiency utilization rate of the 2N architecture power supply system is 50%. In contrast, this application... Figure 4 The power supply system shown can have a maximum load rate of 100% for each distribution link, and since the load equipment is always powered by two of the three distribution links, this application... Figure 4 The power supply system shown can achieve an energy efficiency of 66.7%. Therefore, it is clear that by adopting this application… Figure 4 The power supply system shown will ensure that the load equipment can always be powered by two different power sources, and its energy efficiency will be significantly higher than that of the 2N architecture power supply system.

[0069] For the power supply system described above, it can be achieved through... Figure 5 The architecture diagram shown is used for illustration. For example... Figure 5 The diagram shown is a schematic of a power supply system provided in an embodiment of this application, where N = 4.

[0070] See Figure 5 The power distribution links for UPS in column A include mains power line A, transformer 1, and UPS in column A; the power distribution links for UPS in column B include mains power line B, transformer 2, and UPS in column B; the power distribution links for UPS in column C include mains power line C, transformer 3, and UPS in column C; and the power distribution links for UPS in column D include mains power line D, transformer 4, and UPS in column D.

[0071] If we consider column A as a primary UPS, column C as a primary UPS, and column D as a primary UPS, then column B will serve as a backup UPS for columns A, C, and D.

[0072] Furthermore, since the connection relationship between the main UPS and STS is one-to-one, we can set the output of the UPS in column A to be connected to STS1, the output of the UPS in column C to be connected to STS2, and the output of the UPS in column D to be connected to STS3. In this way, the output of the UPS in column B will be connected to STS1, STS2, and STS3.

[0073] like Figure 5 As shown, assuming Figure 5 The power supply system shown can supply power to four load devices, which are respectively named load device 1, load device 2, load device 3 and load device 4. In this application, the output terminal of STS1 can be connected to load device 1 and load device 2 simultaneously, the output terminal of STS2 can be connected to load device 1, load device 2, load device 3 and load device 4 simultaneously, and the output terminal of STS3 can be connected to load device 3 and load device 4 simultaneously.

[0074] It should be noted that, regarding the above Figure 5 The design of configuring any one load device to connect to two STSs is primarily based on the fact that current load devices only have two ports for connecting to the STS. Therefore, if the number of ports on the load device that can connect to the STS is improved, such as by increasing it to three interfaces, then... Figure 5 Each STS shown can be connected to four load devices in sequence.

[0075] To reiterate, this application will not elaborate further. Figure 5 The diagram illustrates the specific process by which a power supply system consisting of four power distribution links provides redundant power to the load equipment when one of the power distribution links malfunctions.

[0076] For the power supply system described above, it can be achieved through... Figure 6 The architecture diagram shown is used for illustration. For example... Figure 6 The diagram shown is a schematic of a power supply system provided in an embodiment of this application, where N = 5.

[0077] See Figure 6The power distribution links for UPS in column A include mains power line A, transformer 1, and UPS in column A; the power distribution links for UPS in column B include mains power line B, transformer 2, and UPS in column B; the power distribution links for UPS in column C include mains power line C, transformer 3, and UPS in column C; the power distribution links for UPS in column D include mains power line D, transformer 4, and UPS in column D; and the power distribution links for UPS in column E include mains power line E, transformer 5, and UPS in column E.

[0078] If we consider column A as a primary UPS, column C as a primary UPS, column D as a primary UPS, and column E as a primary UPS, then column B will serve as a backup UPS for columns A, C, D, and E.

[0079] Furthermore, since the connection relationship between the main UPS and STS is one-to-one, we can set the output of the UPS in column A to be connected to STS1, the output of the UPS in column C to be connected to STS2, the output of the UPS in column D to be connected to STS3, and the output of the UPS in column E to be connected to STS4. In this way, the output of the UPS in column B will be connected to STS1, STS2, STS3 and STS4.

[0080] like Figure 6 As shown, assuming Figure 6 The power supply system shown can supply power to four load devices, which are respectively named load device 1, load device 2, load device 3 and load device 4. In this application, the output terminal of STS1 can be connected to load device 1 and load device 2 simultaneously, the output terminal of STS2 can be connected to load device 2 and load device 3 simultaneously, the output terminal of STS3 can be connected to load device 3 and load device 4 simultaneously, and the output terminal of STS4 can be connected to load device 4 and load device 1 simultaneously.

[0081] It should be noted that, regarding the above Figure 6 The design of configuring any one load device to connect to two STSs is primarily based on the fact that current load devices are designed with only two ports for connecting to the STS. Therefore, if the number of ports on the load device that can connect to the STS is improved, such as increasing it to four interfaces, then... Figure 6 Each STS shown can be connected to four load devices in sequence.

[0082] To reiterate, this application will not elaborate further. Figure 6 The diagram illustrates the specific process by which a power supply system consisting of five power distribution links provides redundant power to the load equipment when one of the power distribution links malfunctions.

[0083] Furthermore, for scenarios where the number of UPS units is 5, i.e., N=5, such as Figure 7 The diagram shown is a schematic of another power supply system provided in an embodiment of this application.

[0084] See Figure 7 The power distribution links for UPS in column A include mains power line A, transformer 1, and UPS in column A; the power distribution links for UPS in column B include mains power line B, transformer 2, and UPS in column B; the power distribution links for UPS in column C include mains power line C, transformer 3, and UPS in column C; the power distribution links for UPS in column D include mains power line D, transformer 4, and UPS in column D; and the power distribution links for UPS in column E include mains power line E, transformer 5, and UPS in column E.

[0085] Specifically, let the UPS in column A be a primary UPS, let the UPS in column C be a primary UPS, and let the UPS in column E also be a primary UPS. Let the UPS in column B be the backup UPS for the UPS in columns A and C, and let the UPS in column D be the backup UPS for the UPS in columns C and E.

[0086] Furthermore, assume that the output terminals of the UPS in column A are connected to STS1, the output terminals of the UPS in column C are connected to STS2 and STS3, and the output terminals of the UPS in column E are connected to STS4. Also assume that the output terminals of the UPS in column B are connected to STS1 and STS2, and the output terminals of the UPS in column D are connected to STS3 and STS4.

[0087] like Figure 7 As shown, assuming Figure 7 The power supply system shown can supply power to four load devices, which are respectively named load device 1, load device 2, load device 3 and load device 4. In this application, the output terminal of STS1 can be connected to load device 1 and load device 2 simultaneously, the output terminal of STS2 can be connected to load device 2 and load device 3 simultaneously, the output terminal of STS3 can be connected to load device 3 and load device 4 simultaneously, and the output terminal of STS4 can be connected to load device 4 and load device 1 simultaneously.

[0088] Among them, Figure 7 In the power supply system shown, to ensure that downstream load devices can always be powered by two different sources of mains power when any of the main UPS columns experiences an anomaly in the power distribution link, this application allows for the configuration of power supply data for each UPS column's power distribution link, including:

[0089] The power distribution links of UPS in column A can be powered at a maximum load rate of 100%, the power distribution links of UPS in column E can be powered at a maximum load rate of 100%, and the power distribution links of UPS in columns B, C, and D can be powered at a maximum load rate of 50%.

[0090] It should be noted that, regarding the above Figure 7 The design of configuring any one load device to connect to two STSs is primarily based on the fact that current load devices are designed with only two ports for connecting to the STS. Therefore, if the number of ports on the load device that can connect to the STS is improved, such as increasing it to four interfaces, then... Figure 7 Each STS shown can be connected to four load devices in sequence.

[0091] To reiterate, this application will not elaborate further. Figure 7 The diagram illustrates the specific process by which a power supply system consisting of five power distribution links provides redundant power to the load equipment when one of the power distribution links malfunctions.

[0092] In some embodiments of this application, the power supply system includes a first primary uninterruptible power supply (UPS), a second primary UPS, and a backup UPS; wherein a first circuit breaker is installed on the connection line between the first primary UPS and its corresponding first static transfer switch; a second circuit breaker is installed on the connection line between the backup UPS and its corresponding second static transfer switch; a third circuit breaker is installed on the connection line between the second primary UPS and its corresponding second static transfer switch; and a fourth circuit breaker is installed on the connection line between the backup UPS and its corresponding first static transfer switch; the first circuit breaker and the second circuit breaker are electrically interlocked, and the third circuit breaker and the fourth circuit breaker are also electrically interlocked.

[0093] In some embodiments of this application, the first circuit breaker, the second circuit breaker, the third circuit breaker and the fourth circuit breaker are all equipped with undervoltage tripping function and are initially set to the closed state.

[0094] In some embodiments of this application, if the first main uninterruptible power supply system is in an abnormal state, the first circuit breaker trips and opens; based on the electrical interlocking state of the first circuit breaker and the second circuit breaker, the second circuit breaker is in the open state.

[0095] like Figure 8The diagram shows a power supply system according to an embodiment of this application. UPS units in columns A and C are each a primary UPS; more specifically, UPS unit in column C is the first primary UPS, UPS unit in column A is the second primary UPS, and UPS unit in column B is a standby UPS. A circuit breaker S1 is installed at the output of the UPS unit in column A on the line connected to STS1; circuit breaker S1 is the third circuit breaker. A circuit breaker S4 is installed at the output of the UPS unit in column C on the line connected to STS2; circuit breaker S4 is the first circuit breaker. A circuit breaker S2 is installed at the output of the UPS unit in column B on the line connected to STS1; circuit breaker S2 is the second circuit breaker, and circuit breaker S3 is installed at the output of the UPS unit in column B on the line connected to STS2; circuit breaker S3 is the fourth circuit breaker. Circuit breakers S1 and S3 are electrically interlocked, and circuit breakers S2 and S4 are also electrically interlocked. Regarding the configuration of circuit breakers S1 and S3 in an electrically interlocked state, the advantages of this design are illustrated below with an example; furthermore, the advantages of this design of configuring circuit breakers S1 and S3 in an electrically interlocked state will not be elaborated further in this application.

[0096] See Figure 4 When the power distribution link of the UPS in column A fails or is under maintenance, STS1 will switch to power supply from the power distribution link of the UPS in column B. At this time, the two power distribution links supplying power to the four downstream load devices will be changed from the power distribution links of the UPS in column A and column C to the power distribution links of the UPS in column B and column C. If the power distribution link of the UPS in column C also fails at this time, STS2 will switch to power supply from the power distribution link of the UPS in column B. However, obviously, the power distribution link of the UPS in column B will be unable to supply power to the four downstream load devices, which will easily lead to instability of the power supply system and even endanger the load devices.

[0097] against Figure 4 The power supply system shown has relatively low safety issues; please refer to [link to relevant documentation]. Figure 8When the power distribution link of the UPS in column A fails or is under maintenance, circuit breaker S1 will trip and open. STS1 will switch power supply to the power distribution link of the UPS in column B. Simultaneously, based on the electrical interlock between circuit breaker S3 and circuit breaker S1, circuit breaker S3 will also trip and open. At this time, the two power distribution links supplying power to the four downstream load devices will be changed from the power distribution links of UPS in column A and UPS in column C to the power distribution links of UPS in column B and UPS in column C. If the power distribution link of UPS in column C also fails at this time, circuit breaker S4 will trip and open. Based on the electrical interlock between circuit breaker S2 and circuit breaker S4, circuit breaker S2 will also trip and open. At this time, no power distribution link will supply power to the load devices. In this situation, although power supply to the load devices will be temporarily unavailable, this approach poses a much smaller safety hazard to the load devices compared to the situation described above where no circuit breakers were installed in the power supply system and no electrical interlock was configured for the relevant circuit breakers.

[0098] In some embodiments of this application, a first bypass is provided outside any static transfer switch; the first bypass is provided between the input terminal and the output terminal of the static transfer switch, and the first bypass is used to remove the static transfer switch when the circuit is connected.

[0099] Optionally, for the first static transfer switch, the first bypass includes a first sub-bypass that connects the first main uninterruptible power supply system to the first static transfer switch, and a fifth circuit breaker is provided on the first sub-bypass.

[0100] Optionally, for the first static transfer switch, the first bypass includes a second sub-bypass that connects the backup uninterruptible power supply system to the first static transfer switch, and a sixth circuit breaker is provided on the second sub-bypass.

[0101] like Figure 9The diagram shows a power supply system according to an embodiment of this application, where column A and column C are each a main UPS, and column B is a backup UPS. A circuit breaker S1 is installed at the output terminal of the UPS in column A on the line connected to STS1; a circuit breaker S4 is installed at the output terminal of the UPS in column C on the line connected to STS2; a circuit breaker S2 is installed at the output terminal of the UPS in column B on the line connected to STS1; and a circuit breaker S3 is installed at the output terminal of the UPS in column B on the line connected to STS2. Circuit breakers S1 and S3 are configured to be electrically interlocked, and circuit breakers S2 and S4 are also configured to be electrically interlocked. Furthermore, assuming STS2 is the first static transfer switch, the first sub-bypass is the line connecting the power distribution link of the UPS in column C to the load device connected to STS2, where a fifth circuit breaker S8 is installed. The second sub-bypass is the line connecting the power distribution link of the UPS in column B to the load device connected to STS2, where a sixth circuit breaker S7 is installed. Similarly, assuming STS1 is the first static transfer switch, the first sub-bypass is the line connecting the power distribution link of the UPS in column A to the load device connected to STS1, where a fifth circuit breaker S5 is installed. The second sub-bypass is the line connecting the power distribution link of the UPS in column B to the load device connected to STS1, where a sixth circuit breaker S6 is installed. The following explanation uses STS2 as the first static transfer switch as an example to illustrate the specific usage of the first and second sub-bypasses.

[0102] for Figure 9 In the power supply system shown, when STS2 needs to be replaced, STS1 can be switched from the power distribution link of the UPS in column A to the power distribution link of the UPS in column B. Then, circuit breaker S3 is disconnected. Due to the electrical interlock between circuit breakers S1 and S3, circuit breaker S1 will also automatically disconnect. At this time, by closing the fifth circuit breaker S8 on the first sub-bypass, the output of the power distribution link of the UPS in column C will supply power to the four downstream load devices through circuit breakers S4 and S8. STS2 can then be taken out of operation, allowing for its replacement. During the replacement of STS2, the downstream load devices will be powered by the power distribution links of the UPS in columns B and C.

[0103] The above describes how to replace STS2 by closing the fifth circuit breaker S8 on the first sub-bypass. Alternatively, when STS2 needs replacement, it can be achieved by closing the sixth circuit breaker S7 on the second sub-bypass, as follows:

[0104] for Figure 9In the power supply system shown, when STS2 needs to be replaced, the user manually performs a main / standby switch operation on STS2, switching the downstream load equipment from the main circuit to the standby circuit. That is, the current flowing to the downstream load equipment changes from S4 to S3, and STS2 will switch from the C-column UPS distribution link to the B-column UPS distribution link. Then, circuit breaker S4 is disconnected. Simultaneously, based on the electrical interlock between circuit breakers S2 and S4, S2 will automatically trip. At this point, by closing the sixth circuit breaker S7 in the second sub-bypass, STS2 can be taken out of operation, allowing for its replacement. During the STS2 replacement process, the downstream load will be powered by the distribution links of the B-column UPS and the A-column UPS.

[0105] This application also provides a computing device, which may specifically be a desktop computer, portable computer, smartphone, tablet computer, personal digital assistant (PDA), etc. The computing device may include a central processing unit (CPU), memory, input / output devices, etc. Input devices may include a keyboard, mouse, touchscreen, etc., and output devices may include display devices, such as liquid crystal displays (LCDs) and cathode ray tubes (CRTs).

[0106] The memory may include read-only memory (ROM) and random access memory (RAM), and provides the processor with program instructions and data stored in the memory. In the embodiments of this application, the memory may be used to store program instructions for a power supply method;

[0107] The processor is used to call program instructions stored in the memory and execute the power supply method according to the obtained program.

[0108] like Figure 10 The diagram shown is a schematic representation of a computing device provided in an embodiment of this application. The computing device includes:

[0109] The processor 1001, memory 1002, transceiver 1003, and bus interface 1004 are included; wherein the processor 1001, memory 1002, and transceiver 1003 are connected via bus 1005.

[0110] The processor 1001 is used to read the program in the memory 1002 and execute the above power supply method;

[0111] Processor 1001 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. It can also be a hardware chip. The aforementioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The aforementioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0112] The memory 1002 is used to store one or more executable programs and can store data used by the processor 1001 when performing operations.

[0113] Specifically, the program may include program code, which includes computer operation instructions. The memory 1002 may include volatile memory, such as random-access memory (RAM); the memory 1002 may also include non-volatile memory, such as flash memory, hard disk drive (HDD), or solid-state drive (SSD); the memory 1002 may also include combinations of the above types of memory.

[0114] Memory 1002 stores the following elements: executable modules or data structures, or subsets thereof, or extended sets thereof:

[0115] Operation instructions: This includes various operation instructions used to perform various operations.

[0116] Operating system: includes various system programs used to implement various basic business functions and handle hardware-based tasks.

[0117] The 1005 bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 10 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0118] Bus interface 1004 can be a wired communication interface, a wireless bus interface, or a combination thereof. The wired bus interface can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless bus interface can be a WLAN interface.

[0119] This application also provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform a power supply method.

[0120] Those skilled in the art will understand that embodiments of this application can be provided as methods or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied 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.

[0121] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0122] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0123] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0124] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0125] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A power supply system, characterized in that, include: There are N uninterruptible power supply (UPS) systems and N-1 static transfer switches, where N ≥ 3; the N UPS systems include N-1 primary UPS systems and one backup UPS system, and the load rate of the power distribution link of the backup UPS system is never 0. The N-1 primary uninterruptible power supply systems correspond one-to-one with the N-1 static transfer switches; the output terminal of any primary uninterruptible power supply system is connected to the corresponding static transfer switch; the output terminal of each backup uninterruptible power supply system is connected to one-to-one with the N-1 static transfer switches. At least two of the N-1 static transfer switches have their output terminals connected to the same load device; When the first primary uninterruptible power supply system is in an abnormal state, the backup uninterruptible power supply system supplies power to the corresponding load device through the static transfer switch corresponding to the first primary uninterruptible power supply system, so that the power source of the load device is always at least two uninterruptible power supply systems, and the first primary uninterruptible power supply system is any one of the N-1 primary uninterruptible power supply systems. The power supply system includes a first main uninterruptible power supply system, a second main uninterruptible power supply system, and a backup uninterruptible power supply system; wherein, a first circuit breaker is installed on the connection line between the first main uninterruptible power supply system and the corresponding first static transfer switch; a second circuit breaker is installed on the connection line between the backup uninterruptible power supply system and the corresponding second static transfer switch of the second main uninterruptible power supply system; a third circuit breaker is installed on the connection line between the second main uninterruptible power supply system and the corresponding second static transfer switch; and a fourth circuit breaker is installed on the connection line between the backup uninterruptible power supply system and the corresponding first static transfer switch of the first main uninterruptible power supply system. The first circuit breaker and the second circuit breaker are configured to be electrically interlocked, wherein when the first circuit breaker trips and opens, the second circuit breaker also trips and opens. The third circuit breaker and the fourth circuit breaker are configured to be electrically interlocked, wherein when the third circuit breaker trips and opens, the fourth circuit breaker also trips and opens.

2. The power supply system as described in claim 1, characterized in that, The first circuit breaker, the second circuit breaker, the third circuit breaker, and the fourth circuit breaker are all equipped with undervoltage tripping function and are initially set to the closed state.

3. The power supply system as described in claim 1 or 2, characterized in that, Each static transfer switch is provided with a first bypass; the first bypass is located between the input terminal and the output terminal of the static transfer switch, and the first bypass is used to remove the static transfer switch when the circuit is connected.

4. The power supply system as described in claim 3, characterized in that, For the first static transfer switch, the first bypass includes a first sub-bypass that connects the first main uninterruptible power supply system to the first static transfer switch, and a fifth circuit breaker is provided on the first sub-bypass.

5. The power supply system as described in claim 3, characterized in that, For the first static transfer switch, the first bypass includes a second sub-bypass that connects the backup uninterruptible power supply system to the first static transfer switch, and a sixth circuit breaker is provided on the second sub-bypass.

6. The power supply system as described in claim 1 or 2, characterized in that, Each static transfer switch is equipped with a second bypass; the second bypass is used to inspect the static transfer switch when the circuit is connected.

7. A power supply method, characterized in that, The method, applicable to any one of claims 1 to 6, comprises: When any primary uninterruptible power supply system is in operation, it supplies power to the load equipment through the static transfer switch corresponding to the primary uninterruptible power supply system; If the first primary uninterruptible power supply system is in an abnormal state, the backup uninterruptible power supply system supplies power to the load equipment through the static transfer switch corresponding to the first primary uninterruptible power supply system; the first primary uninterruptible power supply system is any one of the N-1 primary uninterruptible power supply systems.

8. The method as described in claim 7, characterized in that, The method further includes: If the first main uninterruptible power supply system is in an abnormal state, the first circuit breaker will trip and disconnect. Based on the electrical interlocking state of the first circuit breaker and the second circuit breaker, the second circuit breaker is in the open state.

9. The method as described in claim 7, characterized in that, The method further includes: When the first static transfer switch corresponding to the first primary uninterruptible power supply system is replaced, the backup uninterruptible power supply system supplies power to the load equipment through the second static transfer switch; Set the fourth circuit breaker between the backup uninterruptible power supply system and the first static transfer switch to the open state; Based on the electrical interlocking state between the third circuit breaker and the fourth circuit breaker, the third circuit breaker is in the open state; The fifth circuit breaker is closed, thereby enabling the first primary uninterruptible power supply system to supply power to the load equipment through the first sub-bypass.

10. The method as described in claim 7, characterized in that, The method further includes: When the first static transfer switch corresponding to the first main uninterruptible power supply system is replaced and the first main uninterruptible power supply system is abnormal, the first circuit breaker is disconnected. Based on the electrical interlocking state between the second circuit breaker and the first circuit breaker, the second circuit breaker is in the open state; The sixth circuit breaker is closed, thereby allowing the backup uninterruptible power supply system to supply power to the load equipment via the second sub-bypass.

11. A computer device, characterized in that, include: Memory, used to store computer programs; A processor is configured to invoke a computer program stored in the memory and execute the method as described in any one of claims 7 to 10 according to the obtained program.

12. A computer-readable storage medium, characterized in that, The storage medium stores computer-executable instructions for causing a computer to perform the method as described in any one of claims 7 to 10.

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