Aging device and system for multipath AC output of power distribution system

Abstract

The utility model relates to the technical field of power distribution, in particular to an aging device and system for multipath alternating current output of a power distribution system. The aging device comprises a branch selection circuit (21), the input end of which is connected with a power distribution system (11) and is used for selecting a target branch from a plurality of branches output by the power distribution system (11); and the power distribution circuit (22) is connected with the output end of the branch selection circuit (21) and is used for configuring preset power for each branch in the branch selection circuit (21). The aging device provided by the utility model can improve the aging test efficiency, and can realize simultaneous testing of power distribution equipment with different aging powers.

Description

An aging device and system for multiple AC outputs in a power distribution system Technical Field

[0001] This utility model relates to the field of power distribution technology. More specifically, this utility model relates to an aging device and system for multiple AC outputs in a power distribution system. Background Technology

[0002] Aging testing is a process of operating and testing products or equipment over a long period of time to evaluate their stability, reliability, and durability under simulated real-world usage conditions. Power distribution systems play a crucial role in power transmission and distribution, and long-term operation can lead to gradual aging due to various factors; therefore, aging testing of power distribution systems is necessary.

[0003] However, traditional aging devices typically employ a single-output structure. For example, they perform aging tests on power distribution equipment in a power distribution system using a single circuit. If multiple power distribution devices or different parts of the same device are to be tested, manual switching between different test circuits is required (finding the circuit endpoints, removing the old circuit, and reconnecting the new circuit), resulting in low efficiency in aging tests. Alternatively, a current sharing mode can be used. However, in current current current current parallel connection mode, it is only suitable for scenarios where the power demand of each branch is the same, and cannot adapt to the parallel aging test of power distribution equipment with different power specifications.

[0004] Therefore, how to solve the problem of low output testing efficiency of a single circuit and the inability of existing aging devices to adapt to multi-circuit parallel aging tests of power distribution equipment with different power specifications are urgent technical problems that need to be solved. Summary of the Invention

[0005] To address the technical problems of low output testing efficiency of single-loop circuits and the inability of existing aging devices to adapt to multi-circuit parallel aging tests of power distribution equipment with different power specifications, this utility model provides solutions in the following aspects.

[0006] In a first aspect, the present invention provides an aging device for multiple AC outputs of a power distribution system, comprising a branch selection circuit, wherein the input terminal of the branch selection circuit is connected to the power distribution system and is used to select a target branch from multiple branches output by the power distribution system; and a power distribution circuit, wherein the power distribution circuit is connected to the output terminal of the branch selection circuit and is used to configure a preset power for each branch in the branch selection circuit.

[0007] Furthermore, the multiple branches output by the power distribution system are respectively connected to the corresponding branches in the branch selection circuit.

[0008] Furthermore, the branch selection circuit includes multiple branches. For any branch, there are circuit breakers and contactors connected in sequence. The circuit breaker is also connected to the output connector of the power distribution unit in the power distribution system, and the contactor is also connected to the corresponding branch in the power distribution circuit. The contactor is used to control the on / off state of the corresponding branch.

[0009] Furthermore, the branch selection circuit includes a first branch and a second branch. The contactor of the first branch and the contactor of the second branch are connected in parallel and then connected to the first button, so that the first branch and the second branch can be output simultaneously through the first button.

[0010] Furthermore, the branch selection circuit includes a third branch and a fourth branch. The contactor of the first branch and the contactor of the second branch are connected in parallel and then connected to the first button, so that the first branch and the second branch can be output simultaneously through the first button.

[0011] Furthermore, the power distribution circuit includes multiple branches. For any given branch, there is a first resistor, a second resistor, and a third resistor. The first resistor is connected to a first bus, the second resistor is connected to a second bus, and the third resistor is connected to a third bus.

[0012] In a second aspect, the present invention also provides an aging system for multiple AC outputs of a power distribution system, comprising a distribution box, a power distribution system, an aging device, and a feedback AC / DC electronic load connected in sequence. The aging device is an aging device for multiple AC outputs of a power distribution system as described in any one of the first aspects, and the feedback AC / DC electronic load is used to feed back the electrical energy to be consumed by the output to the power distribution system.

[0013] Furthermore, the power distribution system includes a power supply control unit and a power distribution unit. The distribution box is connected to the input connector of the power supply control unit through a first circuit breaker. The output connector of the power supply control unit is connected to the input connector of the power distribution unit. The output connector of the power distribution unit is connected to the corresponding branch in the branch selection circuit.

[0014] The beneficial effects of this utility model are as follows: The aging device of this utility model realizes independent power distribution of each branch according to a preset value through a power distribution circuit, which can adapt to the aging power requirements of different power distribution equipment, improve the flexibility and efficiency of aging test, and thus a single system can test multiple power distribution equipment with different power specifications at the same time; furthermore, through the branch selection circuit, the target branch can be selected according to actual needs, which can realize aging test of different power distribution equipment, reduce the operational complexity of switching different test lines, and improve the efficiency of aging test; in addition, by feeding the output electrical energy back to the power distribution system through a feedback AC / DC electronic load, compared with the traditional method of directly consuming electrical energy with resistive loads, the aging system of this utility model improves the energy utilization rate, while avoiding the problem of generating a lot of heat energy by traditional resistive loads, thereby extending the service life of the equipment, and by feeding back electrical energy to the power grid, there is no need to expand the power grid supply, thus reducing the dependence on the external power grid. Attached Figure Description

[0015] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0016] Figure 1 is a schematic diagram of the topology of the branch selection circuit in an aging device according to an embodiment of the present invention.

[0017] Figure 2 is a schematic diagram of the topology of the branch selection circuit in the aging device according to an embodiment of the present invention.

[0018] Figure 3 is a schematic diagram illustrating the topology of the power distribution circuit in an aging device according to an embodiment of the present invention;

[0019] Figure 4 is a schematic structural block diagram of an aging system for multiple AC outputs in a power distribution system according to an embodiment of the present invention.

[0020] Figure 5 is a schematic block diagram of an aging system for multiple AC outputs in a power distribution system according to an embodiment of the present invention. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] Figure 1 is a schematic block diagram illustrating the structure of an aging system for multiple AC outputs in a power distribution system according to an embodiment of the present invention.

[0024] In a first aspect, the present invention provides an aging device for multiple AC outputs in a power distribution system. As shown in FIG4, the aging device 2 for multiple AC outputs in a power distribution system includes a branch selection circuit 21 and a power distribution circuit 22 connected in sequence.

[0025] Specifically, the input terminal of the branch selection circuit 21 is connected to the power distribution system 12 and is used to select the target branch from multiple branches output by the power distribution system 12; the power distribution circuit 22 is connected to the output terminal of the branch selection circuit 21, and the branches in the branch selection circuit 21 are respectively connected to the branches in the power distribution circuit 22. The power distribution circuit 22 is used to configure a preset power for each branch in the branch selection circuit 21.

[0026] In one embodiment, as shown in FIG1, the branch selection circuit 21 includes multiple branches. For any branch, there are circuit breakers and contactors connected in sequence. The circuit breaker is also connected to the output connector of the power distribution unit 122 in the power distribution system 12. The contactor is also connected to the corresponding branch in the power distribution circuit 22. The contactor is used to control the on / off of the corresponding branch, thereby realizing the selection of the target circuit from multiple branches of the power distribution system 12 according to the needs.

[0027] Specifically, the first branch output from the power distribution system 12 passes through the output connector XS2, circuit breaker F1, and contactor KM1 of the power distribution unit 122 connected in sequence; similarly, the second branch output from the power distribution system 12 passes through the output connector XS3, circuit breaker F2, and contactor KM2 of the power distribution unit 122 connected in sequence; the third branch output from the power distribution system 12 passes through the output connector XS4, circuit breaker F3, and contactor KM3 of the power distribution unit 122 connected in sequence; and so on. The composition and connection relationship of the other branches in the branch selection circuit 21 are the same as or similar to the first branch described above.

[0028] Furthermore, depending on the requirements, the coils of contactors KM1 and KM2 can be connected in parallel. Pressing the first button S1 enables the first and second branches to output simultaneously. Alternatively, the coils of contactors KM3, KM4, and KM5 can be connected in parallel. Pressing the second button S2 enables the third, fourth, and fifth branches to output simultaneously. The specific connection relationship is shown in Figure 2. It is understood that those skilled in the art can connect the contactors corresponding to different branches in parallel according to actual needs, thereby achieving simultaneous output of different branches.

[0029] By using a branch selection circuit, the problem of manually switching between different test lines when performing aging tests on power distribution equipment using a single circuit in the existing technology is solved. This reduces the operational complexity of switching between different test lines and thus improves the efficiency of aging tests.

[0030] In one embodiment, as shown in FIG3, the power distribution circuit 22 includes multiple branches. For any given branch, there is a first resistor, a second resistor, and a third resistor. The first resistor is connected to a first bus, the second resistor is connected to a second bus, and the third resistor is connected to a third bus. Specifically, in this embodiment, the power distribution circuit 22 includes a first branch, a second branch, a third branch, and an Nth branch (it can be understood that if N is five, then the power distribution circuit 22 includes a first branch, a second branch, a third branch, a fourth branch, and a fifth branch). The first branch includes a first resistor R1, a second resistor R2, and a third resistor R3. The first resistor R1 corresponds to the A-phase voltage connected to the first busbar A1, the second resistor R2 corresponds to the B-phase voltage connected to the second busbar B1, and the third resistor R3 corresponds to the C-phase voltage connected to the third busbar C1. Similarly, the second branch includes a first resistor R4, a second resistor R5, and a third resistor R6. The first resistor R4 corresponds to the A-phase voltage connected to the first busbar A1, the second resistor R5 corresponds to the B-phase voltage connected to the second busbar B1, and the third resistor R6 corresponds to the C-phase voltage connected to the third busbar C1. Similarly, the third branch includes a first resistor R7, a second resistor R8, and a third resistor R9. The first resistor R7 corresponds to the A-phase voltage connected to the first busbar A1, the second resistor R8 corresponds to the B-phase voltage connected to the second busbar B1, and the third resistor R9 corresponds to the C-phase voltage connected to the third busbar C1. The other branches follow the same logic, with similar or identical connection relationships to the first branch.

[0031] It should be noted that the first resistor, the third resistor, and the fourth resistor are all sliding rheostats. The maximum resistance of the sliding rheostat can be 1Ω. In optional embodiments, those skilled in the art can set the resistance of the sliding rheostat according to actual needs, for example, 0.1Ω.

[0032] It is understandable that, according to the power calculation expression (P = UI = U), 2As can be seen from / R), if the voltage U of the parallel branches is constant, then the power of each branch is inversely proportional to the resistance of the line. Therefore, by adjusting the resistance of each branch, multiple power distribution devices with different power specifications can be tested simultaneously (e.g., the first branch is configured with 12kW, the second branch with 6kW, the third branch with 3kW, etc.).

[0033] For example, suppose the first branch of a power distribution circuit needs to output 12kW, the second branch needs to output 6kW, and the third branch needs to output 3kW. These branches are connected in parallel. Since the voltage U is constant when connected in parallel, the power configuration of each branch is inversely proportional to the resistance on the line. Therefore, after determining the required output power of each branch, the resistance ratio of each branch can be determined based on the ratio of the required power of each branch (in this example, the resistance of the first branch: the resistance of the second branch: the resistance of the third branch = 3:6:12 = 1:2:4). Based on this resistance ratio and the initial value of the resistance of the first branch (or any other branch's initial resistance value), the resistance value of any other branch can be determined. The corresponding sliding rheostat can then be adjusted according to the determined resistance value to configure the power of each branch. Specifically, suppose the resistance of a 100-meter-long soft copper core wire is 0.72Ω. If the branch uses a cross-sectional area of ​​2.5mm²... 2 Given a 3m long soft copper core wire, the resistance R0 of the soft copper core wire in each branch is 0.0216Ω. Since the first branch requires a power distribution of 12kW, the second branch requires 6kW, and the third branch requires 3kW, the corresponding resistance values ​​for the first, second, and third branches are 1:2:4 = (R1+R0):(R2+R0):(R3+R0), where R1 is the resistance value corresponding to the first branch (i.e., the resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3 are all R1), and R2 is the resistance value corresponding to the second branch. The resistance values ​​of the first resistor R4, the second resistor R5, and the third resistor R6 are all R2. R3 is the resistance value corresponding to the third branch (i.e., the resistance values ​​of the first resistor R7, the second resistor R8, and the third resistor R9 are all R3). Setting R1 to 0.1Ω (or R2), we obtain R2 as 0.2216Ω and R3 as 0.4648Ω. Based on these resistance values, the corresponding sliding rheostats in each branch are adjusted accordingly, thereby achieving parallel connection of multiple power outputs. This enables simultaneous aging tests of multiple power distribution devices with different power specifications. The power distribution circuit of this invention solves the problem in existing technologies where multi-path parallel aging tests are only applicable to branches with the same power requirement, thus improving the efficiency and flexibility of aging tests.

[0034] Figure 4 is a schematic block diagram illustrating the structure of an aging system for multiple AC outputs in a power distribution system according to this embodiment.

[0035] Existing aging test technologies for power distribution systems mainly suffer from the following problems: Traditional aging devices typically employ a single-output structure, such as conducting aging tests on power distribution equipment through a single circuit, requiring manual switching between different test lines, resulting in low testing efficiency; Most aging devices use resistive loads to directly consume electrical energy, generating a large amount of heat during aging, leading to low energy utilization (usually below 50%); When aging multiple devices simultaneously, each device requires an independent external power supply, resulting in a large total input power demand, necessitating an additional increase in grid power supply capacity, and the inability to recycle electrical energy, leading to high grid load; Currently, multi-path parallel connection is only suitable for scenarios where the power demand of each branch is the same, and cannot adapt to multi-path parallel aging tests of power distribution equipment with different power specifications; Limited by power distribution capabilities and heat dissipation issues, traditional devices cannot achieve high-power aging by connecting multiple devices in series.

[0036] To address one or more of the aforementioned technical problems, in a second aspect, this utility model also provides an aging system for multiple AC outputs in a power distribution system. As shown in Figure 4, the aging device 2 of this utility model includes a distribution box 11, a power distribution system 12, an aging device 2, and a feedback AC / DC electronic load 31 connected sequentially. The aging device 2 adopts the aging device for multiple AC outputs in a power distribution system described in the first aspect, and the feedback AC / DC electronic load 31 is used to feed back the electrical energy consumed by the output to the power distribution system 12.

[0037] Specifically, the distribution box 11 is connected to the power distribution system 12. Each output branch of the power distribution system 12 is connected to the branch selection circuit 21 of the aging device 2. The power of each branch is proportionally distributed and connected to the corresponding busbar through the power distribution circuit 22 to provide a total output to the feedback AC / DC load 31. The feedback AC / DC load 31 feeds back the electrical energy to be consumed to the input terminal of the power distribution system 12.

[0038] Compared to traditional energy consumption modes, by adding a negative feedback load design, the test power is fed back to the grid, reducing overall energy consumption and increasing energy utilization to over 90%. It also reduces the heat generated by traditional resistive loads, thereby extending the equipment's lifespan. When multiple devices are connected in series, they share a single negative feedback device. Under the same unit time, the total test power can be increased to N times that of the single-machine mode, without requiring additional grid expansion. Furthermore, the branch selection circuit 21 in the aging device 2 allows for selection of the target branch as needed, reducing the complexity of switching between different test lines and improving aging test efficiency. The power distribution circuit 22 in the aging device 2 allows for the allocation of specified power to each branch as required, enabling aging tests of power distribution equipment with different power specifications, thus improving the efficiency and flexibility of aging tests.

[0039] In one embodiment, the power distribution system 12 includes a power supply control unit 121 and a power distribution unit 122. As shown in Figures 4 and 5, the distribution box 11 is connected to the input connector of the power supply control unit 121 through the first circuit breaker 4, the output connector of the power supply control unit 121 is connected to the input connector of the power distribution unit 122, and the output connector of the power distribution unit 122 is connected to the corresponding branch in the branch selection circuit 21.

[0040] The aging device of this invention achieves independent power distribution of each branch according to preset values ​​through a power distribution circuit, which can adapt to the aging power requirements of different power distribution equipment, improving the flexibility and efficiency of aging tests. Therefore, a single system can simultaneously test multiple power distribution equipment with different power specifications. Furthermore, through the branch selection circuit, the target branch can be selected according to actual needs, enabling aging tests on different power distribution equipment, reducing the operational complexity of switching between different test lines, and improving the efficiency of aging tests. In addition, by feeding the output electrical energy back to the power distribution system through a feedback AC / DC electronic load, compared with the traditional method of directly consuming electrical energy using resistive loads, the aging system of this invention improves energy utilization and avoids the problem of generating a large amount of heat energy in traditional resistive loads, thereby extending the service life of the equipment. Moreover, by feeding electrical energy back to the power grid, there is no need for additional expansion of the power grid, thus reducing dependence on the external power grid.

[0041] In the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

[0042] While this specification has shown and described various embodiments of the present invention, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and essence of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention.

Claims

1. An aging device for multiple AC outputs in a power distribution system, characterized in that, It includes a branch selection circuit (21), the input of which is connected to the power distribution system (11) and is used to select a target branch from multiple branches output by the power distribution system (11); and a power distribution circuit (22), which is connected to the output of the branch selection circuit (21) and is used to configure a preset power for each branch in the branch selection circuit (21).

2. The aging device for multi-channel AC output in a power distribution system according to claim 1, characterized in that, The multiple branches output by the power distribution system (11) are respectively connected to the corresponding branches in the branch selection circuit (21).

3. The aging device for multi-channel AC output in a power distribution system according to claim 2, characterized in that, The branch selection circuit (21) includes multiple branches. For any branch, there are circuit breakers and contactors connected in sequence. The circuit breaker is also connected to the output connector of the power distribution unit (122) in the power distribution system (11). The contactor is also connected to the corresponding branch in the power distribution circuit (22). The contactor is used to control the on / off state of the corresponding branch.

4. The aging device for multi-channel AC output in a power distribution system according to claim 3, characterized in that, The branch selection circuit (21) includes a first branch and a second branch. The contactor of the first branch and the contactor of the second branch are connected in parallel and then connected to the first button so that the first branch and the second branch can be output simultaneously through the first button.

5. The aging device for multi-channel AC output in a power distribution system according to claim 1, characterized in that, The power distribution circuit (22) includes multiple branches. For any branch, there is a first resistor, a second resistor and a third resistor. The first resistor is connected to a first bus, the second resistor is connected to a second bus, and the third resistor is connected to a third bus.

6. The aging device for multiple AC outputs in a power distribution system according to claim 5, characterized in that, The first resistor, the second resistor, and the third resistor are all sliding rheostats.

7. An aging system for multiple AC outputs in a power distribution system, characterized in that, The device includes a distribution box (11), a power distribution system (12), an aging device (2), and a feedback AC / DC electronic load (31) connected in sequence. The aging device (2) is an aging device for multiple AC outputs of a power distribution system as described in any one of claims 1-6. The feedback AC / DC electronic load (31) is used to feed back the electrical energy to be consumed by the output to the power distribution system (12).

8. The aging system for AC output of a power distribution system according to claim 7, characterized in that, The power distribution system (12) includes a power supply control unit (121) and a power distribution unit (122). The distribution box (11) is connected to the input connector of the power supply control unit (121) through a first circuit breaker (4). The output connector of the power supply control unit (121) is connected to the input connector of the power distribution unit (122). The output connector of the power distribution unit (122) is connected to the corresponding branch in the branch selection circuit (22).

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