Capacity increasing circuit for data center and power supply system for data center

Abstract

The invention discloses a capacity increasing circuit for a data center and a power supply system for the data center. The compatibilization circuit includes a first rectifier module connected to a first input transformer in a first dual power subsystem of a power supply system configured to receive power from the first input transformer, a second rectifier module connected to a second input transformer configured to receive power from the second input transformer, a first DC bus connected to the first rectifier module, and a second DC bus connected to the second rectifier module. The rectifier module includes a first DC bus configured to receive power from the first rectifier module, a second DC bus configured to receive power from the second rectifier module, and a fast protection device connected between the first DC bus and the second DC bus. According to the capacity increasing circuit and the power supply system disclosed by the invention, more loads can be increased under the power capacity of the existing dual-power subsystem, and the capacity increasing cost is reduced; on the basis that the existing mature power supply and distribution system architecture is not changed and the redundancy level of load power distribution is not reduced, capacity increasing can be carried out on the load.

Description

Technical Field

[0001] The invention relates to a capacity increasing circuit and a power supply system comprising the capacity increasing circuit. Background Art

[0002] In recent years, computer-based industries such as cloud computing, finance, big data, smart homes, and gaming have flourished. With the development of these internet industries, the demand for large-scale computing resources has increased, necessitating the construction of large-scale data centers.

[0003] Data centers are infrastructure used for centralized storage, management, processing, and distribution of data. Data centers typically include a large number of information technology (IT) loads, such as servers, storage devices, and other network equipment. Because IT loads place high demands on the continuity and stability of the power supply system, data center power systems typically include one or more dual power (2N) systems. A dual power supply system can include two power supply units, each capable of meeting the power needs of all IT loads. The two power supply units operate simultaneously and serve as backup for each other. During normal operation, each power supply unit can provide 50% of the power to the IT load. If one power supply unit fails and ceases operation, the other power supply unit can provide 100% of the power to the load. In this way, high reliability of the data center power supply can be ensured. Furthermore, other industries with high power supply reliability requirements, such as heavy industries like oil, gas, and chemical engineering, can also adopt dual power supply systems.

[0004] However, each dual power supply system is not interconnected, resulting in a significant amount of redundant capacity being unused while ensuring power reliability. Furthermore, power capacity (for example, in data centers or heavy industry plants like oil, gas, and chemical plants) is limited, making it difficult to request additional power capacity. Therefore, it is desirable to maximize the use of existing power capacity while ensuring power reliability. Summary of the Invention

[0005] An embodiment of the present disclosure provides a capacity expansion circuit, comprising: a first rectifier module, connected to a first input transformer in a first dual power subsystem among multiple dual-node dual power subsystems of a power supply system, configured to receive power from the first input transformer; a second rectifier module, connected to a second input transformer in a second dual power subsystem among multiple dual power subsystems of the power supply system, configured to receive power from the second input transformer; a first DC bus, connected to the first rectifier module, configured to receive power from the first rectifier module; a second DC bus, connected to the second rectifier module, configured to receive power from the second rectifier module; and a fast protection device, connected between the first DC bus and the second DC bus.

[0006] According to an embodiment of the present disclosure, the capacity expansion circuit further includes a capacity expansion controller, wherein the capacity expansion controller is further configured to: monitor power data of at least one of the first input transformer and the second input transformer, adjust the power output of the first rectifier module in response to an overload of the first input transformer, and adjust the power output of the second rectifier module in response to an overload of the second input transformer.

[0007] According to the capacity expansion circuit of an embodiment of the present disclosure, the overload of the first input transformer is caused by a fault of the third input transformer included in the first dual power subsystem or a fault of the AC bus connected to the third input transformer, and the overload of the second input transformer is caused by a fault of the fourth input transformer included in the second dual power subsystem or a fault of the AC bus connected to the fourth input transformer.

[0008] According to the capacity expansion circuit of an embodiment of the present disclosure, the overload of the first input transformer is caused by a bus failure of an uninterruptible power supply UPS device connected to the third input transformer included in the first dual power subsystem, and the overload of the second input transformer is caused by a bus failure of a UPS device connected to the fourth input transformer included in the second dual power subsystem.

[0009] According to the capacity expansion circuit of an embodiment of the present disclosure, controlling and adjusting the power output of the first rectifier module includes controlling to reduce the power output of the first rectifier module so that the time during which the first input transformer is overloaded is less than the overload allowable operating time of the first input transformer and the circuit breaker of the first input transformer, and controlling and adjusting the power output of the second rectifier module includes controlling to reduce the power output of the second rectifier module so that the time during which the second input transformer is overloaded is less than the overload allowable operating time of the second input transformer and the circuit breaker of the second input transformer.

[0010] According to an embodiment of the present disclosure, the capacity expansion circuit further includes a capacity expansion controller, wherein the capacity expansion controller is further configured to: receive power data of at least one of the third input transformer in the first dual power subsystem and the fourth input transformer in the second dual power subsystem from the AC system controller of the power supply system; in response to a fault of the third input transformer, control and adjust the power output of the first rectifier module; and in response to a fault of the fourth input transformer, control and adjust the power output of the second rectifier module.

[0011] According to the capacity expansion circuit of an embodiment of the present disclosure, controlling and adjusting the power output of the first rectifier module includes controlling to reduce the power output of the first rectifier module so that the first input transformer is not overloaded after the bus tie switch in the first dual power subsystem is closed, and controlling and adjusting the power output of the second rectifier module includes controlling to reduce the power output of the second rectifier module so that the second input transformer is not overloaded after the bus tie switch in the second dual power subsystem is closed.

[0012] According to an embodiment of the present disclosure, the capacity expansion circuit further includes a capacity expansion controller, wherein the capacity expansion controller is further configured to: monitor the power data of at least one input transformer among the first input transformer and the AC bus connected to the first input transformer and the second input transformer and the AC bus connected to the second input transformer, and control the shutdown of the power output of the first rectifier module in response to a fault of the first input transformer or the AC bus connected to the first input transformer, and control the shutdown of the power output of the second rectifier module in response to a fault of the second input transformer or the AC bus connected to the second input transformer.

[0013] According to the capacity expansion circuit of an embodiment of the present disclosure, the fast protection device is further configured to: disconnect the fast protection device in response to a fault of the first DC bus or the second DC bus, and; wherein, in response to a fault of the first DC bus, the first rectifier module automatically shuts down the power output, and wherein, in response to a fault of the second DC bus, the second rectifier module automatically shuts down the power output.

[0014] According to an embodiment of the present disclosure, the capacity-increasing circuit further includes one or more DC branches, which are connected between the capacity-increasing load and the first DC bus or the second DC bus, and the capacity-increasing load receives power from at least one of the first DC bus or the second DC bus through the one or more DC branches, wherein the one or more DC branches include corresponding sub-fast protection devices.

[0015] According to the capacity expansion circuit of an embodiment of the present disclosure, the sub-fast protection device is configured to disconnect the corresponding sub-fast protection device in response to a DC branch fault in which the sub-fast protection device is located.

[0016] According to the capacity-increasing circuit of an embodiment of the present disclosure, the capacity of the first rectifier module is equal to or less than half of the capacity of the first input transformer, the capacity of the second rectifier module is equal to or less than half of the capacity of the second input transformer, the capacity of the first rectifier module is equal to the capacity of the second rectifier module, and the capacity of the capacity-increasing load to which the capacity-increasing circuit is connected is equal to the capacity of the first rectifier module or equal to the capacity of the second rectifier module.

[0017] According to the capacity-increasing circuit of an embodiment of the present disclosure, the first rectifier module includes two or more sub-rectifier modules, wherein the capacity of the two or more sub-rectifier modules included in the first rectifier module is respectively half of the capacity of the first rectifier module; the second rectifier module includes two or more sub-rectifier modules, wherein the capacity of the two or more sub-rectifier modules included in the second rectifier module is respectively half of the capacity of the second rectifier module.

[0018] According to the capacity expansion circuit of an embodiment of the present disclosure, when one of the two or more sub-rectifier modules included in the first rectifier module is overhauled, half of the power of the capacity of the first rectifier module is output through the other sub-rectifier modules included in the first rectifier module; when one of the two or more sub-rectifier modules included in the second rectifier module is overhauled, half of the power of the capacity of the second rectifier module is output through the other sub-rectifier modules included in the second rectifier module.

[0019] According to the capacity expansion circuit of an embodiment of the present disclosure, the UPS devices of the multiple dual power subsystems of the power supply system output AC power or DC power.

[0020] According to the capacity expansion circuit of an embodiment of the present disclosure, the fast protection device is a bidirectional solid-state circuit breaker.

[0021] According to an embodiment of the present disclosure, the capacity-increasing circuit further includes an energy storage device connected to at least one of the first DC bus or the second DC bus, wherein the energy storage device is configured to maintain the voltage of at least one of the first DC bus or the second DC bus when a voltage sag occurs in the power grid. The capacity-increasing circuit further includes a capacity-increasing controller, wherein the capacity-increasing controller is configured to control the operating mode of the energy storage device, wherein the operating mode includes one or more of a droop mode, a constant power mode, and a constant voltage mode.

[0022] According to an embodiment of the present disclosure, the capacity-increasing circuit further includes a renewable energy DC power generation device connected to at least one of the first DC bus or the second DC bus, wherein the capacity-increasing circuit further includes a capacity-increasing controller, and the capacity-increasing controller is configured to control the operating mode of the renewable energy DC power generation device, wherein the operating mode includes one or more of a droop mode, a constant power mode, a constant voltage mode, and a maximum power point tracking mode.

[0023] According to an embodiment of the present disclosure, the capacity expansion circuit further includes a capacity expansion controller, wherein the capacity expansion controller is also configured to control the operating mode of at least one of the first rectifier module and the second rectifier module, wherein the operating mode includes one or more of a droop mode, a constant power mode, and a constant voltage mode.

[0024] According to the capacity expansion circuit of an embodiment of the present disclosure, the capacity expansion controller is further configured to balance the output of the first input transformer or the second input transformer by controlling an operation mode of at least one of the first rectifier module and the second rectifier module.

[0025] The capacity expansion circuit according to an embodiment of the present disclosure further includes: a third rectifier module, connected to the third input transformer in the first dual power subsystem among the multiple dual power subsystems of the power supply system, configured to receive power from the third input transformer, a fourth rectifier module, connected to the fourth input transformer in the second dual power subsystem among the multiple dual power subsystems of the power supply system, configured to receive power from the fourth input transformer, a third DC bus, connected to the third rectifier module, configured to receive power from the third rectifier module, a fourth DC bus, connected to the fourth rectifier module, configured to receive power from the fourth rectifier module, and a second fast protection device, connected between the third DC bus and the fourth DC bus.

[0026] According to the capacity expansion circuit of an embodiment of the present disclosure, the capacity expansion circuit is used in a data center.

[0027] An embodiment of the present disclosure provides a power supply system, comprising: a plurality of dual-node dual power subsystems, configured to output power to a load, each of the plurality of dual power subsystems comprising two input transformers for obtaining power from a power grid, and a capacity expansion circuit, configured to output power to the capacity expansion load, the capacity expansion circuit comprising: a first rectifier module, connected to a first input transformer in a first dual power subsystem of the plurality of dual power subsystems, configured to receive power from the first input transformer, a second rectifier module, connected to a second input transformer in a second dual power subsystem of the plurality of dual power subsystems, configured to receive power from the second input transformer, a first DC bus, connected to the first rectifier module, configured to receive power from the first rectifier module, a second DC bus, connected to the second rectifier module, configured to receive power from the second rectifier module, and a fast protection device, connected between the first DC bus and the second DC bus.

[0028] According to the embodiments of the present disclosure, the capacity expansion circuit and power supply system can add more loads within the power capacity of the existing dual power subsystem, making more effective use of the existing power capacity while keeping the capacity expansion cost low; it can be applied to existing and newly built facilities, increasing the flexibility of the capacity expansion plan; the load capacity can be expanded without changing the existing mature power supply and distribution system architecture and without reducing the redundancy level of the load distribution, and the capacity expansion system has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0030] Figure 1 is an exemplary schematic diagram of a data center power supply system;

[0031] Figure 2A is an exemplary data center power supply system according to at least one embodiment of the present disclosure;

[0032] Figure 2B is another exemplary data center power supply system according to at least one embodiment of the present disclosure;

[0033] Figure 2C is another exemplary data center power supply system according to at least one embodiment of the present disclosure;

[0034] Figure 2D is another exemplary data center power supply system according to at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] Before proceeding with the following detailed description, it may be helpful to set forth definitions of certain words and phrases used throughout this disclosure. The terms "include" and "comprising" and their derivatives mean including, but not limited to, including. The phrase "at least one of," when used with a list of items, means that different combinations of one or more of the listed items may be used, and only one item from the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A, B, and C.

[0036] Definitions for other specific words and phrases are provided throughout this disclosure. Those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior and future uses of such defined words and phrases.

[0037] The various embodiments of the principles of the present disclosure in this patent application document are described below in conjunction with the accompanying drawings for illustration only and should not be interpreted as limiting the scope of the present disclosure in any way. It will be understood by those skilled in the art that the principles of the present disclosure can be implemented in any appropriately arranged system or device. In some cases, the actions described in the present disclosure can be performed in a different order and can still achieve the desired result. In addition, the process depicted in the accompanying drawings does not necessarily require the specific order shown or the sequential order to achieve the desired result. In a specific embodiment, multitasking and parallel processing may be advantageous.

[0038] The text and drawings are provided as examples only to aid understanding of the present disclosure. They should not be interpreted as limiting the scope of the claims appended hereto in any way. Throughout the drawings, the same reference numerals generally indicate the same elements. Although certain embodiments and examples have been provided, it will be clear to those skilled in the art based on the contents of this disclosure that the illustrated embodiments and examples may be modified without departing from the scope of this disclosure.

[0039] Although the data center power supply system is used as an example in the following description, those skilled in the art will understand that the capacity expansion circuit according to the present disclosure can be applied to various power supply systems, such as but not limited to power supply systems in heavy industries such as oil, gas and chemical industries.

[0040] Figure 1 is an exemplary schematic diagram of a data center power supply system.

[0041] The data center power supply system 1000 can supply power to IT loads. Figure 1 As shown, the data center power supply system 1000 may include m (m is a natural number greater than or equal to 1) dual power subsystems. For example, the data center power supply system 1000 may include a first dual power subsystem 1100, a second dual power subsystem 1200, ..., an mth dual power subsystem 1m00.

[0042] Each of the dual power subsystems can supply power to one or more corresponding IT loads. A first dual power subsystem 1100 may include a transformer 1110, a transformer 1120, an AC bus 1130, an AC bus 1140, a bus tie switch 1150, and an uninterruptible power supply (UPS) device 1160. A second dual power subsystem 1200 may include a transformer 1210, a transformer 1220, an AC bus 1230, an AC bus 1240, a bus tie switch 1250, and a UPS device 1260.

[0043] The capacity of transformers 1110 and 1120 in first duplicate power subsystem 1100 can each be N. The capacity of the IT load in first duplicate power subsystem 1100 can also be N. During normal operation, transformers 1110 and 1120 can each carry a load of 0.5N. If either transformer 1110 or 1120 fails, the faulty transformer can be disconnected, bus tie breaker 1150 can be closed, and the remaining transformer can carry all IT loads (i.e., a load of N). During the transition period after the faulty transformer is disconnected and bus tie breaker 1150 is not closed, UPS device 1160 maintains power. In other words, the total capacity of the transformers in first duplicate power subsystem 1100 is a dual power supply, and the IT load capacity of the first duplicate power subsystem is N. The capacity of transformers 1210 and 1220 in second duplicate power subsystem 1200 can each be N. The capacity of the IT load in second duplicate power subsystem 1200 can also be N. During normal operation, transformers 1210 and 1220 can each carry a load of 0.5N. If transformer 1210 or transformer 1220 fails, the faulty transformer can be disconnected, and the remaining transformer can carry all IT loads (i.e., a load capacity of N). During the transition period after the faulty transformer is disconnected and bus tie breaker 1250 is not closed, UPS device 1260 maintains power supply. In other words, the total capacity of the transformers in second duplicate power subsystem 1200 is duplicate power, and the IT load capacity of the second duplicate power subsystem is N.

[0044] During normal operation, there is no connection between each pair of dual power subsystems (eg, the first dual power subsystem 1100 and the second dual power subsystem 1200 ), and a large amount of capacity redundancy cannot be utilized.

[0045] Figure 2A is an exemplary data center power supply system according to at least one embodiment of the present disclosure.

[0046] The data center power supply system can supply power to IT loads. Figure 2A As shown, the data center power supply system may include m (m is a natural number greater than or equal to 1) dual power subsystems. For example, the data center power supply system may include a first dual power subsystem 2100, a second dual power subsystem 2200, ..., an mth dual power subsystem 2m00.

[0047] Each of the dual power subsystems can supply power to one or more corresponding IT loads. The first dual power subsystem 2100 can include an input transformer 2110, an input transformer 2220, an AC bus 2130, an AC bus 2140, a bus tie switch 2150, and a UPS device 2160. The second dual power subsystem 2200 can include an input transformer 2210, an input transformer 2220, an AC bus 2230, an AC bus 2240, a bus tie switch 2250, and a UPS device 2260.

[0048] The data center power supply system may further include a capacity expansion circuit 2300 connected between the first dual power subsystem 2100 and the second dual power subsystem 2200 .

[0049] The capacity expansion circuit 2300 may include a rectifier module 2310 , a rectifier module 2320 , a DC bus 2330 , a DC bus 2340 , and a fast protection device (FPD) 2350 .

[0050] The rectifier module 2310 can be connected to an input transformer 2110 in a first dual power subsystem 2100 of a plurality of dual power subsystems of a data center power supply system. The rectifier module 2310 can receive power from the input transformer 2110.

[0051] The rectifier module 2320 can be connected to the input transformer 2210 in the second dual power subsystem 2200 of the plurality of dual power subsystems of the data center power supply system. The second rectifier module 2320 can receive power from the input transformer 2210.

[0052] The DC bus 2230 may be connected to the rectifier module 2310. The DC bus 2230 may receive power from the rectifier module 2310.

[0053] The DC bus 2240 may be connected to the rectifier module 2320. The DC bus 2240 may receive power from the rectifier module 2320.

[0054] The fast protection device 2350 may be connected between the DC bus 2230 and the DC bus 2240 to connect or disconnect the DC bus 2230 and the DC bus 2240 .

[0055] During normal operation, fast protection device 2350 is always closed, and rectifier modules 2310 and 2320 can draw power from their corresponding dual power subsystems to supply the increased IT loads. If the input transformer 2110 of the first dual power subsystem 2100 (or the input transformer 2210 of the second dual power subsystem 2200) fails, fast protection device 2350 is closed, rectifier module 2310 (or rectifier module 2320) can be deactivated, and the other rectifier module can carry all the increased IT loads. If either DC bus 2230 or DC bus 2240 fails, fast protection device 2350 disconnects, allowing the surviving DC bus 2230 or 2240 to continue operating. The rectifier module corresponding to the surviving DC bus can assume the load previously carried by DC bus 2230 or DC bus 2240, thus meeting the standard that no single failure will affect power supply.

[0056] In this way, more IT loads can be added within the power capacity of the existing dual power subsystem, making fuller use of the existing power capacity while keeping the capacity expansion cost low. This can be applied to existing and newly built data centers, increasing the flexibility of the capacity expansion plan. The load capacity can be increased without changing the existing mature power supply and distribution system architecture of the data center or reducing the redundancy level of the load power distribution, and the reliability of the capacity expansion system is high. It will be understood by those skilled in the art that the capacity expansion circuit and power supply system according to the embodiments of the present disclosure can also be applied to heavy industries such as oil, gas, and chemical industry.

[0057] Figure 2B is another exemplary data center power supply system according to at least one embodiment of the present disclosure.

[0058] like Figure 2B As shown, Figure 2B The data center power supply system also includes a capacity expansion controller 2360. In order to avoid redundancy, Figure 2B Zhongyu Figure 2A The same components will not be described again.

[0059] Despite Figure 2B As shown, the UPS devices of the multiple dual power subsystems of the data center power supply system can output AC power. However, those skilled in the art will appreciate that the UPS devices can also output DC power, for example, by using a data center high-voltage DC UPS device. Fast protection device 2350 can be a bidirectional solid-state circuit breaker.

[0060] In one embodiment, the capacity expansion controller 2360 can monitor power data of at least one of the input transformers 2110 and 2210. In response to an overload on the input transformer 2110, the capacity expansion controller 2360 can control and adjust the power output of the rectifier module 2310. For example, the capacity expansion controller 2360 can control and adjust the power output of the rectifier module 2310. (Herein, reducing the power output may include shutting down the power output.) Additionally or alternatively, the capacity expansion controller 2360 can control and adjust the power output of the rectifier module 2310. Additionally or alternatively, the capacity expansion controller 2360 can control and adjust the power output of the rectifier module 2310. In response to an overload on the input transformer 2210, the capacity expansion controller 2360 can control and adjust the power output of the rectifier module 2320. For example, the capacity expansion controller 2360 can control and adjust the power output of the rectifier module 2320. Additionally or alternatively, the capacity expansion controller 2360 can control and adjust the power output of the rectifier module 2320. Since the fast protection device 2350 is in the closed state, there is no impact on the power supply to the increased IT load side.

[0061] For example, an overload of the input transformer 2110 may be caused by a fault in the input transformer 2120 included in the first dual power subsystem 2100 or a fault in the AC bus 2130 connected to the input transformer 2120. For example, an overload of the input transformer 2210 may be caused by a fault in the input transformer 2220 included in the second dual power subsystem 2200 or a fault in the AC bus 2240 connected to the input transformer 2220.

[0062] For example, the overload of the input transformer 2110 may be caused by a failure of the UPS bus 2180 of the UPS device connected to the input transformer 2120 included in the first dual power subsystem 2100, and the overload of the input transformer 2210 may be caused by a failure of the UPS bus 2280 of the UPS device connected to the input transformer 2220 included in the second dual power subsystem 2200.

[0063] Because the input transformer and its circuit breaker can be overloaded for a short period of time, the capacity expansion controller 2360 can promptly shut down the corresponding rectifier module to ensure system stability. For example, when the input transformer 2110 is overloaded, the capacity expansion controller 2360 controls and adjusts the power output of the rectifier module 2310 so that the duration of the input transformer 2110 overload is less than the permissible overload operating time of the input transformer 2110 and its circuit breaker. By way of example only, the permissible overload operating time of the input transformer 2110 and its circuit breaker may be 20 seconds. The capacity expansion controller 2360 can control and adjust (e.g., directly or indirectly reduce) the power output of the rectifier module 2310 so that the input transformer 2110 is no longer overloaded within 10 seconds. For example, when the input transformer 2210 is overloaded, the capacity expansion controller 2360 controls and adjusts the power output of the rectifier module 2320 so that the time during which the input transformer 2210 is overloaded can be less than the overload allowable operating time of the input transformer 2210 and the circuit breaker of the input transformer 2210. For example only, the overload allowable operating time of the input transformer 2210 and the circuit breaker of the input transformer 2210 can be 20 seconds. The capacity expansion controller 2360 can control and adjust (for example, directly or indirectly reduce) the power output of the rectifier module 2320 so that the input transformer 2210 is no longer overloaded within 10 seconds.

[0064] In another embodiment, the capacity expansion controller 2360 may receive power data from an AC system controller (not shown) of the data center power system regarding at least one of the input transformer 2120 in the first dual power subsystem 2110 and the input transformer 2220 in the second dual power subsystem 2200. In response to a failure in the input transformer 2120, the capacity expansion controller 2360 may control the adjustment of the power output of the rectifier module 2310. For example, the power output of the rectifier module 2310 may be directly reduced, or additionally or alternatively, the power output of the rectifier module 2320 may be indirectly reduced. In response to a failure in the input transformer 2220, the capacity expansion controller 2360 may control the adjustment of the power output of the rectifier module 2320. For example, the power output of the rectifier module 2320 may be directly reduced, or additionally or alternatively, the power output of the rectifier module 2310 may be indirectly reduced. Since the fast protection device 2350 is in the closed state, there is no impact on the power supply to the increased IT load side.

[0065] For example, in response to a fault in input transformer 2120, capacity increase controller 2360 may control a direct reduction in the power output of rectifier module 2310. Additionally or alternatively, capacity increase controller 2360 may control a direct reduction in the power output of rectifier module 2310. Additionally or alternatively, capacity increase controller 2360 may control a direct reduction in the power output of rectifier module 2320. Additionally or alternatively, capacity increase controller 2360 may control a direct reduction in the power output of rectifier module 2320. Additionally or alternatively, capacity increase controller 2360 may control a direct reduction in the power output of rectifier module 2320. Additionally or alternatively, capacity increase controller 2360 may control a direct reduction in the power output of rectifier module 2320. Additionally or alternatively, capacity increase controller 2360 may control a direct increase in the power output of rectifier module 2310. This may prevent overloading of input transformer 2110 or 2210 in the event of a fault in input transformer 2120 or 2220.

[0066] In yet another embodiment, the capacity expansion controller 2360 can monitor power data of at least one of the input transformer 2110 and the AC bus 2140 connected to the input transformer 2110, and the input transformer 2210 and the AC bus 2230 connected to the input transformer 2210. In response to a failure of the input transformer 2110 or the AC bus 2140 connected to the input transformer 2110, the capacity expansion controller 2360 can control the rectifier module 2310 to be shut down. In the event of a failure of the input transformer 2110, after the bus tie switch 2150 is closed, the power output of the rectifier module 2310 can be appropriately increased without overloading the input transformer 2120. In response to a failure of the input transformer 2210 or the AC bus 2230 connected to the input transformer 2210, the capacity expansion controller 2360 can control the rectifier module 2320 to be shut down. In the event of a fault in input transformer 2210, after bus tie breaker 2250 is closed, the power output of rectifier module 2320 can be appropriately increased without overloading input transformer 2220. Because fast protection device 2350 is closed, the output power of the rectifier module on the non-fault side automatically increases, ensuring uninterrupted power supply to the increased IT load.

[0067] In yet another embodiment, the fast protection device 2350 can quickly disconnect in response to a fault in the DC bus 2330 or the DC bus 2340. In one embodiment, the capacity expansion controller 2360 can control the rectifier module 2310 to shut down its power output in response to a fault in the DC bus 2330. The capacity expansion controller 2360 can control the rectifier module 2320 to shut down its power output in response to a fault in the DC bus 2340. In another embodiment, the rectifier module 2310 can automatically shut down its power output in response to a fault in the DC bus 2330. The rectifier module 2320 can automatically shut down its power output in response to a fault in the DC bus 2340.

[0068] In another embodiment, the capacity expansion circuit 2300 further includes one or more capacity expansion branches 2370 for supplying power to the expanded IT load. The one or more DC branches 2370 are connected between the expanded load and the DC bus 2330 or the DC bus 2340. The expanded load receives power from at least one of the DC bus 2330 or the DC bus 2340 via the one or more DC branches 2370, thereby ensuring dual power supply to the expanded load. The one or more DC branches 2370 may include corresponding sub-fast protection devices (not shown). The sub-fast protection device of the DC branch where the expanded load is located may be a unidirectional solid-state circuit breaker. The sub-fast protection device may disconnect in response to a fault in the DC branch 2370 where the sub-fast protection device is located. In this manner, the faulty DC branch is powered on one side, while the other DC branches continue to be powered on both sides, thereby increasing the power supply reliability of the IT power supply system.

[0069] The capacity of the rectifier module 2310 can be half of the capacity of the input transformer 2110 or less than half of the capacity of the input transformer 2110, the capacity of the rectifier module 2320 can be half of the capacity of the input transformer 2210 or less than half of the capacity of the input transformer 2210, the capacity of the rectifier module 2310 can be equal to the capacity of the rectifier module 2320, and the capacity of the capacity-increasing load to which the capacity-increasing circuit 2300 is connected can be equal to the capacity of the rectifier module 2310 or equal to the capacity of the rectifier module 2320.

[0070] Although the capacity increasing circuit 2300 is shown to be connected between the input transformer 2110 and the input transformer 2120, those skilled in the art will understand that the capacity increasing circuit 2300 can be connected between the input transformer 2120 and the input transformer 2220, or can be connected between other dual power supply sub-systems.

[0071] Figure 2C is another exemplary data center power supply system according to at least one embodiment of the present disclosure.

[0072] To avoid redundancy, Figure 2C Zhongyu Figure 2B The same components will not be described again.

[0073] like Figure 2C As shown, Figure 2C The rectifier module 2310 may include a sub-rectifier module 2311 and a sub-rectifier module 2312, wherein the capacity of the sub-rectifier module 2311 and the capacity of the sub-rectifier module 2312 may each be half the capacity of the rectifier module 2310. The rectifier module 2320 may include a sub-rectifier module 2321 and a sub-rectifier module 2322, wherein the capacity of the sub-rectifier module 2321 and the capacity of the sub-rectifier module 2322 may each be half the capacity of the rectifier module 2320.

[0074] For example, when one of the sub-rectifier modules 2311 and 2312 is under maintenance, half the power of the rectifier module 2310 capacity is output through the other of the sub-rectifier modules 2311 and 2312. When one of the sub-rectifier modules 2321 and 2322 is under maintenance, half the power of the rectifier module 2320 capacity is output through the other of the sub-rectifier modules 2321 and 2322. During the maintenance period, the power supply to the additional IT load side is completely unaffected.

[0075] although Figure 2C The number of sub-rectifier modules included in rectifier module 2310 and the number of sub-rectifier modules included in rectifier module 2320 are shown as two, respectively. However, those skilled in the art will appreciate that rectifier module 2310 and rectifier module 2320 can each include more sub-rectifier modules. For example, rectifier module 2310 can include three sub-rectifier modules, each with a capacity of half the capacity of the corresponding rectifier module. In this way, when one sub-rectifier module in a rectifier module is under maintenance, power can be output through at least two other sub-rectifier modules in that rectifier module. Therefore, the power supply reliability of the capacity expansion circuit is further improved.

[0076] like Figure 2C As shown, Figure 2CCapacity expansion circuit 2300 may also include energy storage devices 2381 and 2382 connected to at least one of DC bus 2330 or DC bus 2340. Energy storage devices 2381 and 2382 can maintain the voltage of at least one of DC bus 2330 or DC bus 2340 during a grid voltage sag. Because the fast protection device 2350 switches on and off for extremely short periods of time, energy storage devices 2381 and 2382 do not need to power the fast protection device 2350 during the transition period between switching on and off. Therefore, compared to UPS devices in AC systems, the capacity requirements for energy storage devices 2381 and 2382 are much smaller.

[0077] like Figure 2C As shown, Figure 2C Capacity expansion circuit 2300 may also include renewable energy DC power generation devices 2391 and 2392 connected to at least one of DC bus 2330 or DC bus 2340. Renewable energy DC power generation devices 2391 and 2392 may be photovoltaic power generation devices. In this manner, renewable energy (e.g., photovoltaic) power can be self-consumed (e.g., in a drooping manner). Direct consumption on the DC side can improve efficiency and optimize photovoltaic power flow control.

[0078] The branches where renewable energy DC generators 2391 and 2392 and energy storage devices 2381 and 2382 are located may include corresponding sub-rapid protection devices (not shown). The sub-rapid protection devices connected to the branches of renewable energy DC generators 2391 and 2392 may be unidirectional solid-state circuit breakers. The sub-rapid protection devices connected to the branches of energy storage devices 2381 and 2382 may be bidirectional solid-state circuit breakers.

[0079] The sub-rapid protection device can disconnect in response to a fault in the branch circuit in which it is located. In this way, even if a fault occurs in the branch circuit in which some of the renewable energy DC power generation devices 2391 and 2392 and the energy storage devices 2381 and 2382 are located, bilateral power supply to the increased-capacity IT load is maintained, thereby increasing the reliability of the IT power supply system.

[0080] Capacity expansion controller 2360 can also balance the outputs of input transformer 2110 and input transformer 2210. Because DC system power flow is easily regulated, maintenance-friendly, and control-simplified, capacity expansion controller 2360 can maintain load balancing between transformers. In one embodiment, capacity expansion controller 2360 can control rectifier module 2310 and rectifier module 2320, renewable energy DC power generation devices 2391 and 2392, and energy storage devices 2381 and 2382 to operate in bus voltage droop mode to control current sharing between rectifier module 2310 and rectifier module 2320. In one embodiment, capacity expansion controller 2360 can control one of rectifier module 2310 and rectifier module 2320 to operate in a constant power or droop mode, while controlling the other of rectifier module 2310 and rectifier module 2320 to operate in a pure droop or constant voltage mode. In this way, the loads of input transformer 2110 and input transformer 2210 can be balanced. In one embodiment, the capacity expansion controller 2360 can control the operating modes of the renewable energy DC power generation devices 2391 and 2392 and the energy storage devices 2381 and 2382. The operating modes of the renewable energy DC power generation devices 2391 and 2392 can include, but are not limited to, a droop mode, a constant power mode, a constant voltage mode, a maximum power point tracking (MPPT) mode, etc. The operating modes of the energy storage devices 2381 and 2382 can include, but are not limited to, a droop mode, a constant power mode, a constant voltage mode, etc. The capacity expansion controller 2360 can adjust the output of the rectifier module 2310 and the rectifier module 2320 by controlling the operating modes of the renewable energy DC power generation devices 2391 and 2392 and the energy storage devices 2381 and 2382.

[0081] Although the capacity increasing circuit 2300 is shown to be connected between the input transformer 2110 and the input transformer 2120, those skilled in the art will understand that the capacity increasing circuit 2300 can be connected between the input transformer 2120 and the input transformer 2220, or can be connected between other dual power supply sub-systems.

[0082] For example, the capacity expansion circuit may further include a third rectifier module (not shown), a fourth rectifier module (not shown), a third DC bus (not shown), a fourth DC bus (not shown), and a second fast protection device (not shown).

[0083] The third rectifier module can be connected to the input transformer 2120 in the first dual power subsystem 2100, and the third rectifier module can receive power from the input transformer 2120. The fourth rectifier module can be connected to the input transformer 2220 in the second dual power subsystem 2210. The fourth rectifier module can receive power from the input transformer 2220.

[0084] The third DC bus can be connected to the third rectifier module, and the third DC bus can receive power from the third rectifier module. The fourth DC bus can be connected to the fourth rectifier module, and the fourth DC bus can receive power from the fourth rectifier module. The second fast protection device can be connected between the third DC bus and the fourth DC bus.

[0085] For example, the capacity expansion circuit may also include a rectifier module (not shown), a DC bus (not shown), and a fast protection device (not shown) connected between other dual power subsystems, which are not described here again. By looping all the dual power subsystems, the capacity of the data center power supply system can be further expanded.

[0086] Figure 2D is another exemplary data center power supply system according to at least one embodiment of the present disclosure.

[0087] To avoid redundancy, Figure 2D Zhongyu Figure 2A The same components will not be described again.

[0088] like Figure 2D As shown, Figure 2D The rectifier module 2310 in FIG. 2 may receive power directly from the additional third winding of the input transformer 2110 , and the rectifier module 2320 may receive power directly from the additional third winding of the input transformer 2210 .

[0089] Despite Figure 2A As shown in FIG, the rectifier module 2310 can receive power from the AC bus 2140 of the input transformer 2110, and the rectifier module 2320 can receive power from the AC bus 2230 of the input transformer 2210. Figure 2D As shown in the figure, the rectifier module 2310 can receive power directly from the additional third winding of the input transformer 2110, and the rectifier module 2320 can receive power directly from the additional third winding of the input transformer 2210, but those skilled in the art can understand that other ways of the rectifier module 2310 receiving power from the input transformer 2110 and the rectifier module 2320 receiving power from the input transformer 2210 are also possible, and the present disclosure is not limited to this.

[0090] The capacity expansion circuit and power supply system according to the embodiments of the present disclosure can add more loads within the power capacity of the existing dual power subsystem, making fuller use of the existing power capacity while reducing the cost of capacity expansion. They can be applied to both existing and new facilities, increasing the flexibility of capacity expansion solutions. They can increase load capacity without changing the existing mature power supply and distribution system architecture or reducing the redundancy level of load power distribution, resulting in a highly reliable capacity expansion system. The capacity expansion circuit and power supply system according to the embodiments of the present disclosure can be applied to data centers and heavy industries such as oil, gas, and chemical engineering.

[0091] Those skilled in the art will appreciate that the various illustrative logic blocks, modules, circuits, and steps described herein can be implemented as hardware, software, or a combination of the two. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above in terms of their functional sets. Whether such functional sets are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Technicians can implement the described functional sets in different ways for each specific application, but such design decisions should not be interpreted as causing departure from the scope of this disclosure.

[0092] The various illustrative logical blocks, modules, and circuits described in this disclosure may be implemented or performed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0093] The steps of the method or algorithm described in this disclosure can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, register, hard disk, removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read and write information from / to the storage medium. In an alternative, the storage medium can be integrated into the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside in a user terminal. In an alternative, the processor and storage medium can reside in a user terminal as discrete components.

[0094] In one or more exemplary designs, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media includes both computer storage media and communication media, the latter including any media that facilitates the transfer of a computer program from one location to another. Storage media may be any available media that can be accessed by a general-purpose or special-purpose computer.

[0095] The above embodiments of the present disclosure are merely for ease of description and to help fully understand the present disclosure, and are not intended to limit the scope of the present disclosure. Therefore, it should be understood that, in addition to the above embodiments disclosed herein, all modifications and changes or modified and changed forms of the technical concept of the present disclosure fall within the scope of the present disclosure.

Claims

1. A capacitance increasing circuit, comprising: a first rectifier module connected to a first input transformer in a first dual power subsystem of a plurality of dual power subsystems of the power supply system, configured to receive power from the first input transformer, a second rectifier module connected to a second input transformer in a second dual power subsystem of the plurality of dual power subsystems of the power supply system, configured to receive power from the second input transformer; a first DC bus connected to the first rectifier module and configured to receive power from the first rectifier module; a second DC bus connected to the second rectifier module and configured to receive power from the second rectifier module; A fast protection device is connected between the first DC bus and the second DC bus.

2. The capacity increasing circuit according to claim 1, further comprising a capacity increasing controller, wherein: The capacity expansion controller is further configured to: monitoring power data of at least one of the first input transformer and the second input transformer, In response to the first input transformer being overloaded, controlling to adjust the power output of the first rectifier module, and In response to the second input transformer being overloaded, control adjusts power output of the second rectifier module.

3. The capacitance increasing circuit according to claim 2, wherein: The overload of the first input transformer is caused by a fault of a third input transformer included in the first dual power subsystem or a fault of an AC bus connected to the third input transformer. The overload of the second input transformer is caused by a fault of a fourth input transformer included in the second dual power subsystem or a fault of an AC bus connected to the fourth input transformer.

4. The capacitance increasing circuit according to claim 2, wherein: The overload of the first input transformer is caused by a bus failure of an uninterruptible power supply (UPS) device connected to the third input transformer included in the first dual power subsystem. The overload of the second input transformer is caused by a bus failure of a UPS device connected to a fourth input transformer included in the second dual power subsystem.

5. The capacitance increasing circuit according to claim 2, wherein: Controlling and adjusting the power output of the first rectifier module includes controlling to reduce the power output of the first rectifier module so that the overload time of the first input transformer is less than the overload allowable operation time of the first input transformer and the circuit breaker of the first input transformer. Controlling to adjust the power output of the first rectifier module includes controlling to reduce the power output of the second rectifier module so that the overload time of the second input transformer is less than the overload allowable operation time of the second input transformer and the circuit breaker of the second input transformer.

6. The capacity increasing circuit according to claim 1, further comprising a capacity increasing controller, wherein: The capacity expansion controller is further configured to: receiving power data of at least one of the third input transformer in the first dual power subsystem and the fourth input transformer in the second dual power subsystem from an AC system controller of the power supply system, In response to a third input transformer failure, controlling to adjust the power output of the first rectifier module, In response to the fourth input transformer failing, control adjusts power output of the second rectifier module.

7. The capacitance increasing circuit according to claim 6, wherein: Adjusting the power output of the first rectifier module includes controlling to reduce the power output of the first rectifier module so as not to overload the first input transformer after closing the bus tie switch in the first dual power subsystem. Adjusting the power output control of the second rectifier module reduces the power output of the second rectifier module so as not to overload the second input transformer after closing of the bus tie switch in the second dual power subsystem.

8. The capacity increasing circuit according to claim 1, further comprising a capacity increasing controller, wherein: The capacity expansion controller is further configured to: monitoring power data of at least one of a first input transformer and an AC bus connected to the first input transformer and a second input transformer and an AC bus connected to the second input transformer, In response to a fault in the first input transformer or an AC bus connected to the first input transformer, controlling to shut down the power output of the first rectifier module; and In response to a fault in the second input transformer or an AC bus connected to the second input transformer, the power output of the second rectifier module is controlled to be shut down.

9. The capacitance increasing circuit according to claim 1, wherein: The fast protection device is further configured to: In response to a fault on the first DC bus or the second DC bus, disconnecting the fast protection device, and; Wherein, in response to a first DC bus fault, the first rectifier module automatically shuts down power output, and In response to a fault in the second DC bus, the second rectifier module automatically shuts down power output.

10. The capacity-increasing circuit according to claim 1, further comprising one or more DC branches, wherein the one or more DC branches are connected between the capacity-increasing load and the first DC bus or the second DC bus, and the capacity-increasing load receives power from at least one of the first DC bus or the second DC bus through the one or more DC branches, wherein: One or more DC branches include corresponding sub-fast protection devices.

11. The capacitance increasing circuit according to claim 10, wherein: The sub-rapid protection device is configured as follows: In response to a DC branch fault in which a sub-fast protection device is located, the corresponding sub-fast protection device is disconnected.

12. The capacitance increasing circuit according to claim 1, wherein: The capacity of the first rectifier module is equal to or less than half the capacity of the first input transformer, The capacity of the second rectifier module is equal to or less than half the capacity of the second input transformer, The capacity of the first rectifier module is equal to the capacity of the second rectifier module, The capacity of the capacity-increasing load to which the capacity-increasing circuit is connected is equal to the capacity of the first rectifier module or equal to the capacity of the second rectifier module.

13. The capacitance increasing circuit according to claim 12, wherein: The first rectifier module includes two or more sub-rectifier modules, wherein the capacity of the two or more sub-rectifier modules included in the first rectifier module is respectively half of the capacity of the first rectifier module; The second rectifier module includes two or more sub-rectifier modules, wherein the capacity of the two or more sub-rectifier modules included in the second rectifier module is respectively half of the capacity of the second rectifier module.

14. The capacitance increasing circuit according to claim 13, wherein: When repairing one of the two or more sub-rectifier modules included in the first rectifier module, half of the power capacity of the first rectifier module is output through the other sub-rectifier modules included in the first rectifier module. When one of the two or more sub-rectifier modules included in the second rectifier module is repaired, power of one-half of the capacity of the second rectifier module is output through the other sub-rectifier modules included in the second rectifier module.

15. The capacitance increasing circuit according to claim 1, wherein: The UPS devices of the multiple dual power subsystems of the power supply system output AC power or DC power.

16. The capacitance increasing circuit according to claim 1, wherein: The fast protection device is a bidirectional solid-state circuit breaker.

17. The capacity-increasing circuit according to claim 1 , further comprising an energy storage device connected to at least one of the first DC bus or the second DC bus, wherein the energy storage device is configured to maintain the voltage of at least one of the first DC bus or the second DC bus when a voltage sag occurs in the power grid. in, The capacity expansion circuit further includes a capacity expansion controller configured to control an operation mode of the energy storage device. The operation mode includes one or more of a droop mode, a constant power mode, and a constant voltage mode.

18. The capacity expansion circuit according to claim 1, further comprising a renewable energy DC power generation device connected to at least one of the first DC bus or the second DC bus. in, The capacity expansion circuit further includes a capacity expansion controller configured to control an operation mode of the renewable energy DC power generation device. The operation mode includes one or more of a droop mode, a constant power mode, a constant voltage mode, and a maximum power point tracking mode.

19. The capacity increasing circuit according to claim 1, further comprising a capacity increasing controller, wherein: The capacity expansion controller is configured to control an operation mode of at least one of the first rectifier module and the second rectifier module, The operation mode includes one or more of a droop mode, a constant power mode, and a constant voltage mode.

20. The capacitance increasing circuit according to claim 19, wherein: The capacity increase controller is further configured to balance outputs of the first input transformer or the second input transformer by controlling an operation mode of at least one of the first rectifier module and the second rectifier module.

21. The capacitance increasing circuit according to claim 1, further comprising: a third rectifier module connected to a third input transformer in a first dual power subsystem of the plurality of dual power subsystems of the power supply system, configured to receive power from the third input transformer, a fourth rectifier module connected to a fourth input transformer in a second dual power subsystem of the plurality of dual power subsystems of the power supply system, configured to receive power from the fourth input transformer, a third DC bus connected to the third rectifier module and configured to receive power from the third rectifier module; a fourth DC bus connected to the fourth rectifier module and configured to receive power from the fourth rectifier module, The second fast protection device is connected between the third DC bus and the fourth DC bus.

22. The capacitance increasing circuit according to claim 1, wherein: The capacity expansion circuit is used in a data center.

23. A power supply system comprising: a plurality of dual-node dual power subsystems configured to output power to a load, each of the plurality of dual power subsystems comprising two input transformers that obtain power from a power grid, and A capacity-increasing circuit is configured to output power to a capacity-increasing load, the capacity-increasing circuit comprising: a first rectifier module connected to a first input transformer in a first dual power subsystem of the plurality of dual power subsystems, configured to receive power from the first input transformer, a second rectifier module connected to a second input transformer in a second dual power subsystem of the plurality of dual power subsystems, configured to receive power from the second input transformer, a first DC bus connected to the first rectifier module and configured to receive power from the first rectifier module; a second DC bus connected to the second rectifier module and configured to receive power from the second rectifier module; A fast protection device is connected between the first DC bus and the second DC bus.

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