Power supply device
The parallel design of the grid-side power cabinet and the load power cabinet solves the flexibility problem of the rectifier power supply under different current demands, realizes the efficient configuration of the power supply device and the adaptation of various current demands, and improves product development efficiency.
Patent Information
- Application Number
- CN202422463731.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-10-11
AI Technical Summary
Existing rectifier power supplies face multiple demands for different current sizes at the same power level, resulting in heavy development workload and insufficient flexibility.
The grid-side power cabinet and the load power cabinet are connected in parallel. The grid-side power cabinet is used to convert AC power into DC power, and the load power cabinet is used to convert DC power and output current. Different current requirements can be met by fixing the grid-side power cabinet and flexibly combining the load power cabinets.
The configuration flexibility of the power supply device is improved, the development workload is reduced, the product development efficiency is improved, and the flexible adaptation to various current requirements is achieved.
Smart Images
Figure CN223451845U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to rectification technology, in particular to a power supply device. BACKGROUND
[0002] The rectification power supply is a commonly used power supply device, and its working principle is to convert alternating current into direct current required by a load.
[0003] In actual production, the demand for the rectification power supply is relatively flexible and changeable, and there are various demands for different current sizes under the same power level. Different series of products need to be designed to meet different current demands, and the development workload is large. CONTENT OF THE INVENTION
[0004] The present application provides a power supply device to improve the flexibility of the power supply device configuration and meet various current demands.
[0005] In one aspect, the present application provides a power supply device, comprising: at least one grid-side power cabinet and at least one load power cabinet;
[0006] The at least one grid-side power cabinet is connected in parallel, the input end of the grid-side power cabinet is connected with a power grid, the output end of the grid-side power cabinet is connected with the input end of the load power cabinet, and the grid-side power cabinet is used to convert alternating current output by the power grid into direct current; wherein the sum of the upper limits of the input currents of the at least one grid-side power cabinet is not less than the current output by the power grid.
[0007] The at least one load power cabinet is connected in parallel, the output end of the load power cabinet is connected with a load, and the load power cabinet is used to output current after direct current conversion; wherein the sum of the upper limits of the output currents of the at least one load power cabinet is not less than a target current required by the load.
[0008] In one possible implementation, the grid-side power cabinet comprises: at least one rectification circuit; and the at least one rectification circuit is connected in parallel.
[0009] In one possible implementation, the rectification circuit comprises: a first inductor module and a first power module, wherein,
[0010] The input end of the first inductor module is connected with the power grid as the input end of the rectification circuit, the input end of the first power module is connected with the output end of the first inductor module, and the output end of the first power module is connected with the input end of each load power cabinet as the output end of the rectification circuit.
[0011] In one possible implementation, the alternating current comprises three phases, and the first inductor module comprises: a first inductor, a second inductor and a third inductor, wherein,
[0012] The input ends of the first inductor, the second inductor and the third inductor are connected to the three phases of the alternating current as the first input end, the second input end and the third input end of the first inductor module, and the output ends of the first inductor, the second inductor and the third inductor are connected to the first input end, the second input end and the third input end of the first power module as the first output end, the second output end and the third output end of the first inductor module.
[0013] In a possible implementation, the first power module comprises a first power device, a second power device, a third power device, a fourth power device, a fifth power device, a sixth power device and a first capacitor; wherein,
[0014] The input end of the first power device, the output end of the second power device and the output end of the first inductor are connected, the input end of the third power device, the output end of the fourth power device and the output end of the second inductor are connected, and the input end of the fifth power device, the output end of the sixth power device and the output end of the third inductor are connected;
[0015] The output end of the first power device, the output end of the third power device and the output end of the fifth power device are connected to one end of the first capacitor as the first output end of the first power module and the first input end of each load power cabinet;
[0016] The input end of the second power device, the input end of the fourth power device and the input end of the sixth power device are connected to the other end of the first capacitor as the first output end of the first power module and the second input end of each load power cabinet.
[0017] In a possible implementation, the upper limit of the output current of each load power cabinet is the same.
[0018] In a possible implementation, the load power cabinet comprises at least one DC-DC conversion circuit, and the number of the at least one DC-DC conversion circuit is in parallel.
[0019] In a possible implementation, the DC-DC conversion circuit comprises a second power module, a second inductor module and a first filter module.
[0020] The first input end of the second power module is connected with the first output end of the first power module, the second input end of the second power module is connected with the second output end of the first power module, the first output end of the second power module is connected with the input end of the second inductor module, the second output end of the second power module is connected with one end of the first filter module, and the output end of the second inductor module is connected with the other end of the first filter module.
[0021] In a possible implementation, the second power module comprises a seventh power device, an eighth power device and a second capacitor.
[0022] One end of the second capacitor is in communication with the input end of the seventh power device, and is connected with the first output end of the first power module as the first input end of the second power module.
[0023] The other end of the second capacitor is in communication with the output end of the eighth power device, and is connected with the second output end of the first power module as the second input end of the second power module.
[0024] The output end of the seventh power device is in communication with the input end of the eighth power device, and is connected with the input end of the second inductor module as the first output end of the second power module.
[0025] The output end of the eighth power device is also connected with one end of the first filter module as the second output end of the second power module.
[0026] In a possible implementation, the second inductor module comprises a fourth inductor.
[0027] The input end of the fourth inductor is connected with the output end of the seventh power device as the input end of the second inductor module, and the output end of the fourth inductor is connected with the other end of the first filter module as the output end of the second inductor module.
[0028] In a possible implementation, the first filter module comprises a third capacitor.
[0029] One end of the third capacitor is connected with the second output end of the second power module, and the other end of the third capacitor is connected with the output end of the second inductor module.
[0030] In a possible implementation, the rectifier circuit further comprises at least one fourth capacitor, and each fourth capacitor corresponds to one phase of the alternating current; wherein,
[0031] One end of each fourth capacitor is connected with one phase of the alternating current, and the other end of the at least one fourth capacitor is in communication.
[0032] The power supply device provided in the application, the grid-side power cabinet designed for converting the alternating current output by the grid into direct current and the load-side power cabinet for outputting the current after the direct current conversion, for the same power level power supply, in the series power supply development with different output voltage and current requirements, a fixed number of grid-side power cabinets can be used, when the voltage and current requirements on the load side have a large range of changes, different numbers of load-side power cabinets are assembled and combined to realize flexible series power supply configuration, based on the series and combination development of the product, the power supply product development efficiency can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS
[0033] The drawings incorporated into the specification and forming a part of the specification, show embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.
[0034] Figure 1 Fig. 1 exemplarily shows a structural schematic diagram of a power supply device provided by an embodiment of the application;
[0035] Figure 2 Fig. 2 exemplarily shows a structural schematic diagram of a rectifier circuit provided by an embodiment of the application;
[0036] Figure 3 Fig. 3 exemplarily shows a structural schematic diagram of a direct current to direct current conversion circuit provided by an embodiment of the application;
[0037] Figure 4 Fig. 4 exemplarily shows a structural schematic diagram of another power supply device provided by an embodiment of the application;
[0038] Figure 5 Fig. 5 exemplarily shows a structural schematic diagram of still another power supply device provided by an embodiment of the application;
[0039] Figure 6 Fig. 6 exemplarily shows a flowchart of a power supply configuration method provided by an embodiment of the application.
[0040] Through the above drawings, the specific embodiments of the application have been shown, and more detailed descriptions will be given in the following. The drawings and the written description are not intended to limit the scope of the concept of the application by any means, but to illustrate the concept of the application to the person skilled in the art by referring to the specific embodiments. DETAILED DESCRIPTION
[0041] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, like reference numerals refer to like elements, unless the context clearly dictates otherwise. The following description of exemplary embodiments is not representative of all possible embodiments consistent with the present application. Instead, it is merely an example of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.
[0042] The module in the present application refers to a functional module or a logic module. It can be in the form of software, and its functions are realized by executing program codes by a processor; or it can be in the form of hardware. The "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.
[0043] The rectifier power supply is a commonly used power supply device, and its working principle is to convert alternating current into direct current required by a load.
[0044] In actual production, the demand for rectifier power supply is relatively flexible and variable, and there are multiple demands for different current sizes under the same power level. Different series of products need to be designed to meet different current demands, and the development workload is large.
[0045] Based on the above technical problems, the power supply device provided by the embodiments of the present application can improve the flexibility of the power supply device configuration through the serialization and combination design of the power supply device products, and meet multiple current demands.
[0046] The technical solutions of the present application will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes may not be described again in some examples.
[0047] Embodiment one
[0048] Figure 1 The structure schematic diagram of the power supply device provided by the embodiments of the present application is shown in the figure. Figure 1 As shown in the figure, the power supply device provided by the embodiments of the present application can include at least one grid-side power cabinet 100 and at least one load power cabinet 200.
[0049] The at least one grid-side power cabinet 100 is connected in parallel, the input end of the grid-side power cabinet 100 is connected with the power grid, the output end of the grid-side power cabinet 100 is connected with the input end of the load power cabinet 200, and the grid-side power cabinet 100 is used to convert alternating current output by the power grid into direct current; wherein the sum of the upper limit of the input current of the at least one grid-side power cabinet 100 is not less than the current output by the power grid;
[0050] At least one load power cabinet 200 is connected in parallel, and an output end of the load power cabinet 200 is connected with a load, and the load power cabinet 200 is used to convert direct current to direct current and output current after direct current conversion; wherein a sum of upper limits of output currents of the at least one load power cabinet 200 is not less than a target current required by the load.
[0051] Specifically, the power supply device can be implemented by using a two-stage topology conversion. The first-stage circuit converts alternating current output by a power grid into direct current, and the second-stage circuit adjusts the size of the direct current, thereby outputting direct current required by the load. In system design, the first-stage circuit can be designed as a grid-side power cabinet 100, and the second-stage circuit can be designed as a load power cabinet 200. The grid-side power cabinet 100 and the load power cabinet 200 can be independently designed with heat exchange devices, thereby independently designing heat dissipation, eliminating thermal conduction and thermal convection and other thermal mutual coupling between the cabinet bodies, and independently realizing thermal performance on the basis of electrical independence of the grid-side power cabinet 100 and the load power cabinet 200.
[0052] In a specific implementation, when power supplies of the same power level are configured, the power conversion requirement of the grid side can be fixed, the grid-side power cabinet 100 can be kept unchanged, and a plurality of load power cabinets 200 can be connected in parallel to realize output of a plurality of voltages and currents on the load side. In order to improve the serialization and combination development of products, the configuration of each load power cabinet 200 can be the same, and thanks to the electrical independence and thermal independence design of the load power cabinet 200, additional thermal verification development workload is not required in the serialization development of products.
[0053] The sum of upper limits of output currents of all the parallel load power cabinets 200 is not less than the target current required by the load. For example, assuming that the upper limit of output current of a single load power cabinet 200 is 5000A, the same specification load power cabinets 200 are used, and the target current required by the load is 9000A, two load power cabinets 200 are connected in parallel to meet the current requirement of the load.
[0054] The above power supply device is designed for the grid-side power cabinet for converting alternating current output by a power grid into direct current and the load power cabinet for converting direct current to direct current and outputting current after direct current conversion. For power supplies of the same power level, a fixed number of grid-side power cabinets can be used in the serialization power supply development of different output voltage and current requirements. When the voltage and current requirements on the load side have a large range of changes, different numbers of load power cabinets can be assembled and combined to realize flexible serialization power supply configuration. Based on the serialization and combination development of products, the power supply product development efficiency can be effectively improved.
[0055] In a possible implementation manner, as shown in Figure 1 The grid-side power cabinet 100 includes at least one rectifier circuit 110, and the at least one rectifier circuit 110 is connected in parallel.
[0056] In a specific implementation, in the face of power supply power demand of a large power, for example, 5MW level, in order to avoid too many numbers of the grid side power cabinet 100, a plurality of parallel rectifier circuits 110 can be arranged in each grid side power cabinet 100, so as to expand the power upper limit of each grid side power cabinet 100. Further, by parallelly connecting a plurality of grid side power cabinets 100, the alternating current output by the power grid can be reliably converted into direct current, and the rectification demand of the large power supply can be effectively met.
[0057] Figure 2 The structure schematic diagram of the rectifier circuit provided by the embodiment of the present application is shown in FIG. 1. As shown in a possible implementation manner, the rectifier circuit 110 includes a first inductor module 111 and a first power module 112, wherein, Figure 2 The input end of the first inductor module 111 is connected with the power grid as the input end of the rectifier circuit 110, the input end of the first power module 112 is connected with the output end of the first inductor module 111, and the output end of the first power module 112 is connected with the input end of each load power cabinet 200 as the output end of the rectifier circuit 110.
[0058] Specifically, in order to facilitate configuration and management, the rectifier circuit 100 can be divided into the first inductor module 111 and the first power module 112 according to the types of elements, wherein the first inductor module 111 includes inductor elements, and the first power module 112 includes power devices. By dividing the rectifier circuit 100 into different modules according to the types of elements, the producibility of the product can be improved, and the maintenance and management of the power supply device are facilitated.
[0059] As shown in a possible implementation manner, the alternating current includes three phases, and the first inductor module 111 includes a first inductor L1, a second inductor L2 and a third inductor L3, wherein,
[0060] Figure 2 The input end of the first inductor L1, the second inductor L2 and the third inductor L3 is connected with the three phases of the alternating current as the first input end, the second input end and the third input end of the first inductor L1 module, and the output end of the first inductor L1, the second inductor L2 and the third inductor L3 is connected with the first input end, the second input end and the third input end of the first power module 112 as the first output end, the second output end and the third output end of the first inductor L1 module.
[0061]
[0062] In a specific implementation, corresponding to three-phase alternating current, the first inductance module 111 is provided with a first inductor L1, a second inductor L2 and a third inductor L3, the input ends of the first inductor L1, the second inductor L2 and the third inductor L3 are connected to the three phases of the alternating current respectively, and the output ends of the first inductor L1, the second inductor L2 and the third inductor L3 are connected to the first input end, the second input end and the third input end of the first power module 112 respectively.
[0063] As shown in Figure 2 In a possible implementation, the first power module 112 includes a first power device Q1, a second power device Q2, a third power device Q3, a fourth power device Q4, a fifth power device Q5, a sixth power device Q6 and a first capacitor L1; wherein,
[0064] The input end of the first power device Q1, the output end of the second power device Q2 and the first phase of the alternating current are connected, the input end of the third power device Q3, the output end of the fourth power device Q4 and the second phase of the alternating current are connected, and the input end of the fifth power device Q5, the output end of the sixth power device Q6 and the third phase of the alternating current are connected;
[0065] The output end of the first power device Q1, the output end of the third power device Q3 and the output end of the fifth power device Q5 are in communication with the other end of the first capacitor L1, and are connected as the first output end of the first power module 112 and the first input end of each load power cabinet 200;
[0066] The input end of the second power device Q2, the input end of the fourth power device Q4 and the input end of the sixth power device Q6 are in communication with one end of the first capacitor L1, and are connected as the first output end of the first power module 112 and the second input end of each load power cabinet 200.
[0067] Specifically, the first power module 112 can be a three-phase bridge full-control rectifier circuit, including three output terminal connected power devices (common cathode group) Q2, Q4, Q6, and three input terminal connected power devices (common anode group) Q1, Q3, Q5. For the 3 power devices of the common cathode group, the one with the highest input terminal (also called anode) connected AC voltage value is turned on; for the 3 power devices of the common anode group, the one with the lowest output terminal (also called cathode) connected AC voltage value is turned on. In this way, at any moment, one power device in the common anode group and one power device in the common cathode group are in the on state, and the voltage output by the three-phase bridge full-control rectifier circuit is a certain line voltage, thereby realizing the conversion of AC to DC. Among them, the first power device Q1, the second power device Q2, the third power device Q3, the fourth power device Q4, the fifth power device Q5, and the sixth power device Q6 are turned on under the action of a trigger pulse, and the size of the output DC voltage can be controlled by adjusting the trigger pulse. In order to improve the stability of the circuit, a first capacitor C1 can be added to the output terminal of the three-phase bridge full-control rectifier circuit to smooth the DC voltage output by the three-phase bridge full-control rectifier circuit and reduce the output pulsating voltage of the circuit.
[0068] In a specific implementation, the power device can be selected in multiple ways, including but not limited to silicon-controlled rectifier, thyristor, Insulate-Gate Bipolar Transistor (IGBT), Power MOSFET, etc., and the present application does not limit this. Figure 3 Taking an NPN type IGBT as an example for illustration.
[0069] It can be understood that when the power device is an NPN type IGBT, the input terminal of the power device corresponds to the collector of the NPN type IGBT, the output terminal of the power device corresponds to the emitter of the NPN type IGBT, and the control terminal of the power device corresponds to the gate of the NPN type IGBT.
[0070] In one possible implementation, the upper limit of the output current of each load power cabinet 200 is the same.
[0071] Specifically, the upper limit of the output current of different load power cabinets 200 can be the same or different. In order to improve the production efficiency of the load power cabinet 200, the same configuration of the load power cabinet 200 can be used.
[0072] In one possible implementation, as shown in Figure 1 Fig. 2, the load power cabinet 200 includes at least one DC-to-DC conversion circuit 210; the number of at least one DC-to-DC conversion circuit 210 is connected in parallel.
[0073] In a specific implementation, in the face of power supply power demand of a large power, for example, 5MW level, in order to avoid too many numbers of the load power cabinet 200, a plurality of parallel DC-DC conversion circuits 210 can be arranged in each load power cabinet 200, so as to expand the power upper limit of each load power cabinet 200. Further, by connecting a plurality of load power cabinets 200 in parallel, the required DC power can be reliably output to the load, and the power demand of the large power supply can be effectively met.
[0074] Figure 3 A structural schematic diagram of a DC-DC conversion circuit provided by an embodiment of the present application is shown in FIG. 2. As shown in a possible implementation, the DC-DC conversion circuit 210 includes a second power module 211, a second inductor module 212, and a first filter module 213. Figure 3
[0075] The first input end of the second power module 211 is connected with the first output end of the first power module 112, the second input end of the second power module 211 is connected with the second output end of the first power module 112, the first output end of the second power module 211 is connected with the input end of the second inductor module 212, the second output end of the second power module 211 is connected with one end of the first filter module 213, and the output end of the second inductor module 212 is connected with the other end of the first filter module 213.
[0076] Specifically, in order to facilitate configuration and management, the DC-DC conversion circuit 210 can be divided into the second power module 211, the second inductor module 212, and the first filter module 213 according to the types of elements, wherein the second power module 211 includes power devices, the second inductor module 212 includes inductor elements, and the first filter module 213 includes filter capacitors. By dividing the rectifier circuit 100 into different modules according to the types of elements, the producibility of the product can be improved, and the maintenance and management of the power supply device are facilitated.
[0077] In a possible implementation, as shown in FIG. 2, the second power module 211 includes a seventh power device Q7, an eighth power device Q8, and a second capacitor C2. Figure 3
[0078] One end of the second capacitor C2 is in communication with the input end of the seventh power device Q7, and is connected with the first output end of the first power module 112 as the first input end of the second power module 211.
[0079] The other end of the second capacitor C2 is in communication with the output end of the eighth power device Q8, and is connected with the second output end of the first power module 112 as the second input end of the second power module 211.
[0080] The output end of the seventh power device Q7 is in communication with the input end of the eighth power device Q8, and is connected with the input end of the second inductor module 212 as the first output end of the second power module 211;
[0081] The output end of the eighth power device Q8 is connected with one end of the first filter module 213 as the second output end of the second power module 211.
[0082] In a possible implementation manner, as shown in Figure 3 The second inductor module 212 includes a fourth inductor L4.
[0083] The input end of the fourth inductor L4 is connected with the output end of the seventh power device Q7 as the input end of the second inductor module 212, and the output end of the fourth inductor L4 is connected with the other end of the first filter module 213 as the output end of the second inductor module 212.
[0084] In a specific implementation, the second power module 211 and the second inductor module 212 constitute a direct current step-down circuit (Buck circuit), when the control end of the seventh power device Q7 receives a high level, the seventh power device Q7 is turned on, the fourth inductor L4 is charged, the current flowing through the fourth inductor L4 is linearly increased, and energy is provided for the direct current output end; when the control end of the seventh power device Q7 receives a low level, the seventh power device Q7 is not turned on, the fourth inductor L4 is discharged through the eighth power device Q8, the current flowing through the fourth inductor L4 is linearly reduced, and the output voltage is maintained by the reduced inductor current. By controlling the on-off of the seventh power device Q7, the average value of the output voltage can be changed, and the direct current-direct current conversion is realized.
[0085] The eighth power device Q8 is in an off state, and the freewheeling diode of the eighth power device Q8 functions as a diode in the circuit. By using the eighth power device Q8, a separate diode can be avoided in the circuit, and the same specifications can be used for each power device in the circuit, which can effectively reduce the types of key elements in the circuit, improve the producibility and performance stability of the product, and realize the unification of maintenance spare parts of market end power modules.
[0086] Further, the input end and the output end of the second power module 211 and the second inductor module 212 can be converted, so that the second power module 211 and the second inductor module 212 constitute a direct current step-up circuit (Boost circuit), without the need to separately develop and produce a direct current step-up module suitable for a power supply device, to realize the normalized design of direct current conversion.
[0087] In a possible implementation manner, as shown in Figure 3 The first filter module 213 includes a third capacitor C3.
[0088] One end of the third capacitor C3 is connected to the second output end of the second power module 211 , and the other end of the third capacitor C3 is connected to the output end of the second inductor module 212 .
[0089] In a specific implementation, the third capacitor C3 can filter the DC power output to the load, remove unnecessary AC components, and smooth the DC power supply connected between the positive and negative poles of the DC voltage.
[0090] Figure 4 This is a schematic diagram of the structure of another power supply device provided in an embodiment of the present application. Figure 4 As shown, assuming the output current limit of a single load power cabinet 200 is 5000A, when the target current is 10000A, two load power cabinets 200 can be set up in parallel. The power supply device is configured with two grid-side power cabinets 100, each of which includes a first inductor module 111 and a first power module 112. Each load power cabinet 200 has the same configuration, including three parallel second power modules 211, three parallel second inductor modules 212, and three parallel first filter modules 213. If the output current limit of each DC-DC converter circuit 210 is the same, the output current limit of each DC-DC converter circuit 210 is 1667A. Figure 5 This is a structural diagram of another power supply device provided in an embodiment of the present application. Figure 5 As shown, assuming that the output current upper limit of a single load power cabinet 200 is 5000A, when the target current is 15000A, three load power cabinets 200 connected in parallel can be set.
[0091] In one possible implementation, Figure 4 As shown, the rectifier circuit further includes: at least one fourth capacitor C4, and at least one fourth capacitor C4 corresponds to one phase of the alternating current; wherein,
[0092] One end of each fourth capacitor C4 is connected to one phase of the alternating current; the other end of at least one fourth capacitor C4 is connected.
[0093] Specifically, for three-phase AC power, three fourth capacitors C4 are provided, one end of each of the three fourth capacitors C4 being connected to a phase of the AC power, and the other ends of the three fourth capacitors C4 being connected. By providing the fourth capacitors, the AC power output from the power grid can be effectively filtered, noise can be reduced, and the power supply quality can be improved.
[0094] The embodiment of the present application also provides a power supply configuration method for configuring the power supply device as described above. In practical application, the execution subject of the method can be a power supply configuration device, which can be realized by a computer program, such as application software, or can be realized as a medium storing the related computer program, such as a U disk, a cloud disk, or can be realized by an entity device integrating or installing the related computer program, such as a chip or a server. Figure 6 The flowchart of the power supply configuration method provided by the embodiment of the present application is shown in FIG. 2. Figure 6 As shown in the figure, the method comprises the following steps.
[0095] S601, obtaining a target current of a load;
[0096] S602, determining the number of load power cabinets according to the size of the target current; wherein the sum of the upper limits of the output currents of the load power cabinets is not less than the target current.
[0097] S603, configuring the power supply device according to the number of load power cabinets.
[0098] Specifically, under the same power level, the target current required by the load is obtained. According to the size of the target current, the number of required load power cabinets is determined, so that the sum of the upper limits of the output currents of the load power cabinets is not less than the target current, thereby meeting the target current demand.
[0099] For example, according to the upper limit of the output current of a single load power cabinet, a plurality of current intervals and the corresponding number of load power cabinets can be set, and according to the current interval to which the target current belongs, the number of load power cabinets required by the target current can be quickly determined.
[0100] For example, assuming that the upper limit of the output current of each load power cabinet is 5000A, the first current interval is set as 0<I≤5000A, and the number of load power cabinets corresponding to the first current interval is 1; the first current interval is set as 5000A<I≤10000A, and the number of load power cabinets corresponding to the first current interval is 2; the first current interval is set as 10000A<I≤15000A, and the number of load power cabinets corresponding to the first current interval is 3, and so on, wherein I is the size of the target current. If the target current is 13000A, the current interval to which the target current belongs is determined as the third current interval, and the number of required load power cabinets is 3.
[0101] In specific implementation, the number of grid-side power cabinets can be fixed, and different current demands can be met by changing the number of parallel load power cabinets, thereby realizing flexible configuration of the power supply device.
[0102] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.
[0103] It is to be understood that the application is not limited to the precise construction hereinafter described and as shown in the attached drawings, and that various changes in form and detail can be made therein without departing from the scope thereof. The scope of the application is limited only by the claims which follow.
Claims
1. A power supply device, characterized in that: include: At least one grid-side power cabinet and at least one load power cabinet; The at least one grid-side power cabinet is connected in parallel, the input end of the grid-side power cabinet is connected to the grid, the output end of the grid-side power cabinet is connected to the input end of the load power cabinet, and the grid-side power cabinet is used to convert the alternating current output by the grid into direct current; wherein the sum of the input current upper limits of the at least one grid-side power cabinet is not less than the current output by the grid; The at least one load power cabinet is connected in parallel, the output end of the load power cabinet is connected to the load, and the load power cabinet is used to output current after DC conversion; wherein the sum of the output current upper limits of the at least one load power cabinet is not less than the target current required by the load.
2. The device according to claim 1, characterized in that The grid-side power cabinet includes: at least one rectifier circuit; the at least one rectifier circuit is connected in parallel.
3. The device according to claim 2, characterized in that The rectifier circuit includes: a first inductor module and a first power module, wherein: The input end of the first inductance module is connected to the power grid as the input end of the rectifier circuit, the input end of the first power module is connected to the output end of the first inductance module, and the output end of the first power module is connected to the input end of each load power cabinet as the output end of the rectifier circuit.
4. The device according to claim 3, characterized in that The alternating current includes three phases, and the first inductor module includes: a first inductor, a second inductor and a third inductor, wherein: The input ends of the first inductor, the second inductor, and the third inductor serve as the first input end, the second input end, and the third input end of the first inductor module, and are respectively connected to the three phases of the alternating current. The output ends of the first inductor, the second inductor, and the third inductor serve as the first output end, the second output end, and the third output end of the first inductor module, and are respectively connected to the first input end, the second input end, and the third input end of the first power module.
5. The device according to claim 4, characterized in that The first power module includes a first power device, a second power device, a third power device, a fourth power device, a fifth power device, a sixth power device and a first capacitor; wherein, The input end of the first power device, the output end of the second power device, and the output end of the first inductor are connected; the input end of the third power device, the output end of the fourth power device, and the output end of the second inductor are connected; the input end of the fifth power device, the output end of the sixth power device, and the output end of the third inductor are connected; The output end of the first power device, the output end of the third power device, and the output end of the fifth power device are connected to one end of the first capacitor, serving as the first output end of the first power module and connected to the first input end of each of the load power cabinets; The input end of the second power device, the input end of the fourth power device, and the input end of the sixth power device are connected to the other end of the first capacitor, serving as the first output end of the first power module and connected to the second input end of each load power cabinet.
6. The device according to claim 5, characterized in that The load power cabinet includes: at least one DC to DC conversion circuit; the number of the at least one DC to DC conversion circuits are connected in parallel.
7. The device according to claim 6, characterized in that The DC-DC conversion circuit includes: a second power module, a second inductor module and a first filter module; The first input end of the second power module is connected to the first output end of the first power module, the second input end of the second power module is connected to the second output end of the first power module, the first output end of the second power module is connected to the input end of the second inductor module, the second output end of the second power module is connected to one end of the first filter module, and the output end of the second inductor module is connected to the other end of the first filter module.
8. The device according to claim 7, characterized in that The second power module includes: a seventh power device, an eighth power device and a second capacitor; One end of the second capacitor is connected to the input end of the seventh power device, serving as the first input end of the second power module and connected to the first output end of the first power module; The other end of the second capacitor is connected to the output end of the eighth power device, serving as the second input end of the second power module and connected to the second output end of the first power module; The output end of the seventh power device is connected to the input end of the eighth power device, and serves as the first output end of the second power module and is connected to the input end of the second inductor module; The output end of the eighth power device also serves as the second output end of the second power module and is connected to one end of the first filter module.
9. The device according to claim 8, characterized in that The second inductor module includes: a fourth inductor; The input end of the fourth inductor is connected to the output end of the seventh power device as the input end of the second inductor module, and the output end of the fourth inductor is connected to the other end of the first filter module as the output end of the second inductor module.
10. The device according to claim 7, characterized in that The first filtering module includes: a third capacitor; One end of the third capacitor is connected to the second output end of the second power module, and the other end of the third capacitor is connected to the output end of the second inductor module.
11. The device according to claim 3, characterized in that The rectifier circuit further includes: at least one fourth capacitor, each of the at least one fourth capacitor corresponds to a phase of the alternating current; wherein, One end of each of the fourth capacitors is connected to one phase of the alternating current; the other end of the at least one fourth capacitor is connected.
12. The device according to any one of claims 1 to 11, characterized in that The output current upper limit of each load power cabinet is the same.