Power supply equipment power assembly for nuclear power station

Abstract

The invention provides a power supply equipment power assembly for a nuclear power station, which belongs to the technical field of instrument parts and comprises a power switch module, a capacitor module and a laminated busbar. The power switch module comprises an upper row of power switch units and a lower row of power switch units which are correspondingly arranged up and down; the capacitor module is arranged right in front of the lower row of power switch units; the laminated busbar is arranged on the top surface of the capacitor module and is electrically connected with the capacitor module; the laminated busbar comprises a first busbar and a second busbar which are stacked up and down and are insulated from each other; the first busbar is provided with a first upper terminal which is folded upwards and a first lower terminal which is folded downwards; the second busbar is provided with a second upper terminal which is folded upwards and a second lower terminal which is folded downwards. The first upper terminal and the second upper terminal are electrically connected with the upper row of power switch units respectively; and the first lower terminal and the second lower terminal are electrically connected with the lower row of power switch units respectively. The power density is increased, the overall occupied space is reduced, and the utilization rate of the capacitor module is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of instrument components, and more specifically, relates to a power component of power supply equipment for a nuclear power plant. Background Art

[0002] The power supply device includes a power assembly, and the modules contained in the power assembly are electrically coupled to each other to achieve power conversion. The power assembly usually includes a power switch module, a capacitor module and a corresponding electrical connection module; wherein the power switches contained in the power switch module are electrically coupled to each other and form a power topology to achieve the current conversion function, the capacitor module is electrically coupled to the input or output end of the power switch module to form a DC bus, and the electrical connection module is used to establish a corresponding electrical connection relationship between the two.

[0003] As power levels continue to increase, the power density of power components continues to increase, resulting in an increasing number of corresponding devices in the power components. If the power components still use a conventional layout, they will occupy a large space and the utilization rate of the capacitor module will be low. Summary of the invention

[0004] The purpose of the present invention is to provide a power component for power supply equipment of a nuclear power plant, aiming to solve the technical problems existing in the prior art of large occupied space and low utilization rate of capacitor modules.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a power component of a power supply equipment for a nuclear power plant, comprising: The power switch module comprises an upper row of power switch units and a lower row of power switch units which are arranged correspondingly from top to bottom; A capacitor module is arranged in front of the lower row of power switch units; A stacked busbar is arranged on the top surface of the capacitor module and is electrically connected to the capacitor module; the stacked busbar includes a first busbar and a second busbar which are stacked up and insulated from each other; the first busbar has a first upper terminal folded upward and a first lower terminal folded downward; the second busbar has a second upper terminal folded upward and a second lower terminal folded downward; The first upper terminal and the second upper terminal are electrically connected to the upper row of power switch units, respectively; the first lower terminal and the second lower terminal are electrically connected to the lower row of power switch units, respectively.

[0006] In a possible implementation, the upper row of power switch units and the lower row of power switch units are symmetrically arranged along a first direction; the first upper terminal and the first lower terminal are staggered up and down, the second upper terminal and the second lower terminal are staggered up and down, and the first lower terminal is located directly below the second upper terminal, and the second lower terminal is located directly below the first upper terminal.

[0007] In some embodiments, at least one of the first upper terminal, the first lower terminal, the second upper terminal and the second lower terminal is a lead-out terminal, and the rest are in-line terminals; The lead-out terminal includes a lead-out portion and a connecting portion. In the first direction, the lead-out portion is located at the periphery of the linear terminals, and the connecting portion corresponds to one of the linear terminals up and down.

[0008] In some embodiments, the lead-out portion and the connecting portion are arranged in an L-shape.

[0009] In some embodiments, an insulating plate is provided between the connecting portion and the corresponding straight-row terminals above and below the connecting portion; and the insulating plate is attached to the stacked busbar.

[0010] In some embodiments, a first outer insulating layer is disposed on an outer surface of the first busbar, a second outer insulating layer is disposed on an outer surface of the second busbar, and an intermediate insulating layer is disposed between the first busbar and the second busbar.

[0011] In some embodiments, the first outer insulating layer and the middle insulating layer are both provided with a bending portion, or the second outer insulating layer and the middle insulating layer are both provided with a bending portion; The two bent portions are respectively in contact with two side surfaces of the lead-out portion.

[0012] In a possible implementation, the second busbar is located above the first busbar; the second lower terminal is a connecting copper busbar, the connecting copper busbar is located below the second busbar and behind the capacitor module, and the connecting copper busbar is also connected to a Hall device; The first upper terminal and the first lower terminal are respectively integrally formed with the first busbar; the second upper terminal is integrally formed with the second busbar.

[0013] In some embodiments, the connecting copper busbar comprises: A first copper busbar, one end of which is connected to the second busbar and the other end of which extends downward; and The second copper bar has one end connected to the extended end of the first copper bar, and the other end bent upward and connected to the lower row of power switch units; the second copper bar has a horizontal extended end, and the Hall device is sleeved on the horizontal extended end.

[0014] In a possible implementation, the upper row of power switch units includes a plurality of upper power switches spaced apart along a first direction, the lower row of power switch units includes a plurality of lower power switches spaced apart along the first direction, and the plurality of upper power switches correspond to the plurality of lower power switches one by one; The first busbar has a first upper terminal corresponding to the plurality of upper power switches one by one, and a first lower terminal corresponding to the plurality of lower power switches one by one; The second busbar has second upper terminals corresponding one-to-one to the plurality of upper power switches, and second lower terminals corresponding one-to-one to the plurality of lower power switches.

[0015] The beneficial effects of the power component of the power supply equipment for a nuclear power plant provided by the present invention are as follows: compared with the prior art, in the power component of the power supply equipment for a nuclear power plant provided by the present invention, the upper row of power switch units and the lower row of power switch units are arranged correspondingly up and down, which increases the power density while reducing the occupied space, and can also share a group of heat sinks, optimize the layout of components, and improve the heat dissipation efficiency; the capacitor module is respectively connected to the upper row of power switch units and the lower row of power switch units through stacked busbars, thereby improving the utilization rate of the capacitor module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a power component of a power supply device for a nuclear power plant provided in an embodiment of the present invention Figure 1 ; Figure 2 A schematic diagram of the structure of a power component of a power supply device for a nuclear power plant provided in an embodiment of the present invention Figure 2 (The capacitor module is not shown in the figure); Figure 3 for Figure 2 Schematic diagram of the enlarged structure at the middle circle A; Figure 4 A schematic diagram of the structure of a stacked busbar of a power component of a power supply device for a nuclear power plant provided by an embodiment of the present invention; Figure 5 A schematic diagram of an exploded structure of a stacked busbar of a power component of a power supply device for a nuclear power plant provided by an embodiment of the present invention; Figure 6 A schematic diagram of the position structure of a first busbar and a second busbar of a stacked busbar of a power component of a power supply device for a nuclear power plant provided in an embodiment of the present invention; Figure 7 for Figure 6 A schematic diagram of the enlarged structure at the middle circle B; Figure 8 A schematic structural diagram of a power switch module of a power assembly of a power supply device for a nuclear power plant provided in an embodiment of the present invention.

[0018] In the figure: 1. Power switch module; 11. Upper row power switch unit; 12. Lower row power switch unit; 2. Capacitor module; 3. stacked busbar; 31. first busbar; 311. first upper terminal; 312. first lower terminal; 32. second busbar; 321. second upper terminal; 322. second lower terminal; 3221. first copper busbar; 3222. second copper busbar; 33. lead-out terminal; 331. lead-out portion; 332. connection portion; 34. insulation board; 35. first outer insulation layer; 36. second outer insulation layer; 37. intermediate insulation layer; 38. bending portion; 4. Hall device; 5. Radiator. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] Please also read Figure 1 and Figure 2 The power assembly of the power supply equipment for a nuclear power plant provided by the present invention is now described. The power assembly of the power supply equipment for a nuclear power plant comprises a power switch module 1 , a capacitor module 2 and a laminated busbar 3 .

[0021] The power switch module 1 includes an upper row of power switch units 11 and a lower row of power switch units 12 which are arranged correspondingly from top to bottom; the capacitor module 2 is arranged directly in front of the lower row of power switch units 12; the stacked busbar 3 is arranged on the top surface of the capacitor module 2 and is electrically connected to the capacitor module 2; the stacked busbar 3 includes a first busbar 31 and a second busbar 32 which are stacked up and insulated from each other; the first busbar 31 has a first upper terminal 311 folded upward and a first lower terminal 312 folded downward; the second busbar 32 has a second upper terminal 321 folded upward and a second lower terminal 322 folded downward.

[0022] The first upper terminal 311 and the second upper terminal 321 are electrically connected to the upper row power switch units 11 , respectively; the first lower terminal 312 and the second lower terminal 322 are electrically connected to the lower row power switch units 12 , respectively.

[0023] The power component of this embodiment is exemplarily configured as an inverter power component and applied to an inverter. The inverter (not shown in the figure) includes a cabinet, and the above-mentioned power component, a heat sink 5 and a fan located in the cabinet.

[0024] The power switch module 1 is configured as an inverter power module, which receives direct current and outputs alternating current through DC / AC conversion. The structure of the upper row power switch unit 11 is the same as that of the lower row power switch unit 12, and both play the role of controlling the on-off of the current and adjusting the output power. By quickly turning on and off the upper row power switch unit 11 and the lower row power switch unit 12, the alternating conversion of direct current is realized, thereby generating alternating current output.

[0025] The upper row power switch unit 11 and the lower row power switch unit 12 are both high heat generating devices and are arranged on the same heat dissipation substrate. The heat sink 5 also has a plurality of heat dissipation fins, and a wind gap extending in the up-down direction is formed between each two adjacent heat dissipation fins. The air supply airflow passes through the plurality of wind gaps and performs convection heat exchange with each heat dissipation tooth to take away the heat of the upper row power switch unit 11 and the lower row power switch unit 12. The fan is generally arranged above the heat sink 5.

[0026] The heat sink 5 generally adopts a standard size model. In the prior art, generally only one group of power switch units is arranged on the heat dissipation substrate of the heat sink 5. If the power density of the power component needs to be increased, generally, the power component is added horizontally and / or vertically on the basis of the power component, resulting in a large overall space occupied by the power component and a low utilization rate of the capacitor module 2.

[0027] This embodiment optimizes the layout position of the power switch module 1 and simultaneously arranges the upper row of power switch units 11 and the lower row of power switch units 12 on the same heat dissipation substrate, which is equivalent to doubling the original power density without occupying additional space; moreover, the upper row of power switch units 11 and the lower row of power switch units 12 are commonly connected to the capacitor module 2 through the stacked busbar 3, thereby improving the utilization rate of the capacitor module 2.

[0028] The capacitor module 2 includes a plurality of capacitors and a bracket supporting the plurality of capacitors. The plurality of capacitors are connected to direct current and form a direct current bus. The bracket can be slidably arranged on the frame of the cabinet. The capacitor module 2 is located directly in front of the lower row of power switch units 12 and is slidably connected to the cabinet frame. On the one hand, the capacitor module 2 can be pulled out forward for easy maintenance; on the other hand, the DC input copper busbar can be placed directly above the capacitor module 2, that is, in front of the upper row of power switch units 11, to facilitate the connection and disconnection of the DC input copper busbar.

[0029] The stacked busbar 3 is used to electrically couple the capacitor module 2 and the power switch module 1. Electrical coupling does not only refer to a simple electrical connection between the components or modules, but refers to the components or modules establishing an electrical connection relationship according to the circuit topology and realizing the corresponding circuit function.

[0030] The stacked busbar 3 is located above the capacitor module 2. The first busbar 31 and the second busbar 32 are stacked up and down, and each capacitor module 2 is connected to the first busbar 31 and the second busbar 32. One of the first busbar 31 and the second busbar 32 can be regarded as a positive busbar, and the other can be regarded as a negative busbar; the positive busbar has two sets of positive terminals (i.e., the first upper terminal 311 and the first lower terminal 312, or the second upper terminal 321 and the second lower terminal 322), and the negative busbar has two sets of negative terminals (i.e., the second upper terminal 321 and the second lower terminal 322, or the first upper terminal 311 and the first lower terminal 312).

[0031] The first upper terminal 311 and the second upper terminal 321 are respectively electrically connected to the upper row power switch unit 11; the first lower terminal 312 and the second lower terminal 322 are respectively electrically connected to the lower row power switch unit 12. In other words, the upper row power switch unit 11 is connected to a group of positive terminals and a group of negative terminals, and the lower row power switch unit 12 is connected to another group of positive terminals and another group of negative terminals.

[0032] Compared with the prior art, the power assembly of the power supply equipment for a nuclear power plant provided by the present invention has an upper row of power switch units 11 and a lower row of power switch units 12 arranged in correspondence with each other, which increases the power density while reducing the occupied space, and can share a group of heat sinks 5, thereby optimizing the layout of components and improving the heat dissipation efficiency; the capacitor module 2 is respectively connected to the upper row of power switch units 11 and the lower row of power switch units 12 through stacked busbars, thereby improving the utilization rate of the capacitor module 2.

[0033] In some embodiments, the upper row of power switch units 11 includes a plurality of upper power switches spaced apart along a first direction, and the lower row of power switch units 12 includes a plurality of lower power switches spaced apart along a first direction, and the plurality of upper power switches correspond one-to-one to the plurality of lower power switches; the first busbar 31 has a first upper terminal 311 corresponding one-to-one to the plurality of upper power switches, and a first lower terminal 312 corresponding one-to-one to the plurality of lower power switches; the second busbar 32 has a second upper terminal 321 corresponding one-to-one to the plurality of upper power switches, and a second lower terminal 322 corresponding one-to-one to the plurality of lower power switches.

[0034] The structures of the upper power switch and the lower power switch are exactly the same. Multiple upper power switches and multiple lower power switches can work in parallel to share the total power load, thereby improving the power handling capacity of the entire power switch unit and enabling it to be applied to high-power circuit systems.

[0035] In some embodiments, the power switch module 1 and the stacked busbar 3 may be configured as follows: Figure 8 and Figure 4 The structure shown, see Figure 8 and Figure 4The upper row of power switch units 11 and the lower row of power switch units 12 are symmetrically arranged along the first direction; the first upper terminal 311 and the first lower terminal 312 are staggered up and down, the second upper terminal 321 and the second lower terminal 322 are staggered up and down, and the first lower terminal 312 is located directly below the second upper terminal 321, and the second lower terminal 322 is located directly below the first upper terminal 311.

[0036] The first direction can be understood as a direction perpendicular to the up and down direction of the power component. The upper row of power switch units 11 and the lower row of power switch units 12 are symmetrically arranged along the first direction. From the perspective of circuit stability, it helps that when the circuit is working, the current can be more evenly distributed on the upper row of power switch units 11 and the lower row of power switch units 12, which can reduce the risk of overheating and damage caused by a single switch carrying too much current, thereby improving the stability and reliability of the entire circuit. During the power conversion process, it can also reduce electromagnetic interference to other parts of the circuit and the external environment, and improve the electromagnetic compatibility of the circuit.

[0037] From a control perspective, the symmetrical setting makes the design of the control circuit simpler; the control signal can be applied to the upper row of power switch units 11 and the lower row of power switch units 12 in the same way, reducing the complexity and variability of the control circuit; it helps to improve the accuracy and stability of the control, making the on and off times of the upper row of power switch units and the lower row of power switch units 12 more consistent, thereby improving the quality of the output AC power.

[0038] From the perspective of heat dissipation, the heat generated by the upper row of power switch units 11 and the lower row of power switch units 12 is also relatively evenly distributed on the entire heat sink 5. This makes the design of the heat sink 5 more reasonable, can better meet the heat dissipation requirements, and improve the heat dissipation efficiency. Compared with the asymmetric setting, the symmetrical structure can avoid the concentration of thermal stress caused by local overheating, reduce the impact on the power switch module 1 and other circuit components, and further improve the reliability of the circuit.

[0039] From the perspective of connection with the stacked busbar 3, the connecting pins of the upper row of power switch units 11 are located at the bottom thereof, and the connecting pins of the lower row of power switch units 12 are located at the top thereof. The two sets of connecting pins are spaced apart and symmetrically arranged. The stacked busbar 3 can be placed between the two sets of connecting pins. The first upper terminal 311 and the second upper terminal 321 only need to be folded upward a short distance to be connected to the connecting pins of the upper row of power switch units 11. Therefore, the length of the first upper terminal 311 and the second upper terminal 321 that are folded upward can be reduced accordingly, thereby simplifying the structure of the stacked busbar 3.

[0040] In addition, in the front-to-back direction, the first upper terminal 311 and the second upper terminal 321 will not block the upper row of power switch units 11. On the one hand, the upper row of power switch units 11 can dissipate heat better. On the other hand, the problem of uneven current distribution caused by the upper row of power switch units 11 being blocked by the terminals can be reduced, ensuring that the current can be efficiently transmitted from the terminals to the power switches, thereby improving the electrical performance and stability of the entire power component. Thirdly, it is convenient for staff to promptly discover possible faults or abnormal conditions in the power switch module 1, facilitate maintenance and repair work, and improve the maintainability and availability of the equipment.

[0041] The effects of the connection positions of the first lower terminal 312 , the second lower terminal 322 and the lower row power switch module 1 are the same as the above-mentioned effects, which will not be described in detail here.

[0042] Since the upper row of power switch units 11 and the lower row of power switch units 12 are symmetrically arranged, the positive connecting pins of the upper row of power switch units 11 and the positive connecting pins of the lower row of power switch units 12 are staggered up and down, and the negative connecting pins of the upper row of power switch units 11 and the negative connecting pins of the lower row of power switch units 12 are also staggered up and down. In order to adapt to the above structure, the first upper terminal 311 and the first lower terminal 312 are staggered up and down, the second upper terminal 321 and the second lower terminal 322 are staggered up and down, and the first lower terminal 312 is located directly below the second upper terminal 321, and the second lower terminal 322 is located directly below the first upper terminal 311.

[0043] In some embodiments, the stacked busbar 3 may be used as follows: Figure 6 and Figure 7 The structure shown, see Figure 6 and Figure 7 Among the first upper terminal 311, the first lower terminal 312, the second upper terminal 321 and the second lower terminal 322, at least one is a lead-out terminal 33, and the rest are straight-line terminals; the lead-out terminal 33 includes a lead-out portion 331 and a connecting portion 332. In the first direction, the lead-out portion 331 is located at the periphery of the straight-line terminal, and the connecting portion 332 corresponds to one of the straight-line terminals up and down.

[0044] Since the first lower terminal 312 corresponds to the second upper terminal 321 in upper and lower directions, and the second lower terminal 322 corresponds to the first upper terminal 311 in upper and lower directions, if the above four terminals are bent upward or downward directly at the edge of the busbar, one of the corresponding groups will inevitably have interference problems. Therefore, among the above four terminals, at least one terminal cannot be bent directly, and needs to bypass the corresponding terminals in upper and lower directions before being bent.

[0045] In this embodiment, at least one of the four terminals is a lead terminal 33, and the rest are straight-row terminals, which are bent upward or downward directly from the edge of the busbar. The lead terminal 33 is also bent upward or downward from the edge of the busbar (i.e., forming a lead portion 331), and then extends to the side of the corresponding straight-row terminals above and below (i.e., forming a connecting portion 332).

[0046] In this embodiment, at least one lead-out terminal 33 is provided on the stacked busbar 3, so that the above four terminals correspond to each other in pairs and do not interfere with each other. The implementation method is simple, the structural design is ingenious, and there is no need to connect additional wiring copper bars to the stacked busbar 3, which simplifies the overall structure of the stacked busbar 3 and does not occupy too much area.

[0047] In addition, the lead-out terminals 33 and the straight-row terminals are integrally formed with the busbar, which can improve the contact reliability. The contact area of ​​each folded terminal with other components is relatively large and the contact is closer, which can reduce the contact resistance, reduce heat generation, improve the stability and reliability of the electrical connection, and help the stable transmission of current, avoiding power failure, overheating and other problems caused by poor contact. It can also enhance the conductivity.

[0048] Furthermore, the folded shape of the above four terminals is easier to be installed with other components. For example, they can be conveniently fixed to the connection pins of the power switch unit by bolts, nuts, etc., saving installation time and cost, while also improving the accuracy and consistency of installation. Moreover, the folded part can provide additional mechanical support and fixation, making the connection more secure, able to withstand certain external forces such as tension and shear force, and not easy to loosen or fall off, especially in some vibration or dynamic working environments.

[0049] See also Figure 6 and Figure 7 On the basis of the above embodiment, the lead-out portion 331 and the connecting portion 332 are arranged in an L shape. The lead-out portion 331 is folded downward or upward, and the connecting portion 332 extends horizontally. The lead-out portion 331 and the connecting portion 332 are integrally formed with the busbar.

[0050] The lead-out portion 331 and the connection portion 332 are arranged in an L-shape, so that the lead-out terminal 33 is more flexible in space utilization, can better adapt to the compact electrical layout, save lateral space, and make the overall structure of the stacked busbar 3 more compact. In addition, the L-shaped structure increases the contact area between the lead-out copper busbar and the surrounding air, which is conducive to the dissipation of heat, especially when a large current passes through, it can better dissipate the heat to avoid affecting the electrical performance and the normal operation of the equipment due to overheating.

[0051] Exemplarily, in this embodiment, the first lower terminal 312 is designed as the lead-out terminal 33, and the first upper terminal 311, the second upper terminal 321 and the second lower terminal 322 are designed as straight-line terminals.

[0052] In some embodiments, the lead terminal 33 and the corresponding straight-row terminals above and below it can also be connected by Figure 5 and Figure 7 The structure shown, see Figure 5 and Figure 7 An insulating plate 34 is provided between the connecting portion 332 and the corresponding straight-row terminals above and below it; the insulating plate 34 is attached to the stacked busbar 3.

[0053] Preferably, the insulating plate 34 is in the shape of a long strip, and a convex portion extending outward is provided on its long side. The insulating plate 34 is arranged on the lower surface of the stacked busbar 3, and the convex portion extends outward relative to the stacked busbar 3 and is located between the connecting portion 332 and the corresponding straight-row terminals above and below it, and is used to insulate and isolate the lead-out terminal 33 and the straight-row terminal to prevent short circuit and maintain voltage stability.

[0054] In some embodiments, the stacked busbar 3 may be used as follows: Figure 5 The structure shown, see Figure 5 A first outer insulating layer 35 is provided on the outer surface of the first busbar 31 , a second outer insulating layer 36 is provided on the outer surface of the second busbar 32 , and an intermediate insulating layer 37 is provided between the first busbar 31 and the second busbar 32 .

[0055] The first busbar 31 and the second busbar 32 are stacked up and down and insulated. The outer surface of the first busbar 31 is provided with a first outer insulating layer 35, and the outer surface of the second busbar 32 is provided with a second outer insulating layer 36. That is to say, the outer surface of the stacked busbar 3 is covered with an insulating layer. From the aspect of electrical safety, it is used to prevent electric shock, effectively prevent the human body from directly contacting the busbar, avoid the danger of electric shock caused by current passing through the human body, and protect the personal safety of operators and surrounding personnel; and avoid short circuits, prevent the first busbar 31 from accidentally contacting the second busbar 32 or other conductive objects to cause short circuit faults, reduce the serious consequences such as damage to electrical equipment and fire caused by short circuits, and ensure the safe operation of the electrical system. From the aspect of electrical performance, it maintains insulation performance, reduces leakage, and reduces the capacitance effect.

[0056] An intermediate insulating layer 37 is also provided between the first busbar 31 and the second busbar 32. One of the first busbar 31 and the second busbar 32 is a positive busbar, and the other is a negative busbar. Since there is a voltage difference between the positive busbar and the negative busbar, direct contact will result in a short circuit. The intermediate insulating layer 37 can effectively prevent direct electrical contact between the positive and negative electrodes, thereby avoiding the generation of short-circuit current. In addition, the intermediate insulating layer 37 can maintain electrical isolation between the positive busbar and the negative busbar, ensuring the stability of their respective voltages, and avoiding the normal operating performance of the circuit being affected by capacitive coupling or other electrical interference between the two electrodes.

[0057] In some embodiments, the stacked busbar 3 may also be used as follows: Figure 4 and Figure 7 The structure shown, see Figure 4 and Figure 7 The first outer insulating layer 35 and the middle insulating layer 37 are both provided with a bending portion 38 , or the second outer insulating layer 36 and the middle insulating layer 37 are both provided with a bending portion 38 ; the two bending portions 38 are respectively attached to the two side surfaces of the lead-out portion 331 .

[0058] Since the lead-out portion 331 does not need to be connected to the connection pin of the power switch unit, bent portions 38 are attached to both sides of the lead-out portion 331 to isolate the lead-out portion 331 to prevent operators from accidentally touching the lead-out portion 331 and preventing electric shock. It can also prevent short circuit faults caused by accidental contact between the lead-out portion 331 and other conductive objects.

[0059] In some embodiments, the stacked busbar 3 may also be used as follows: Figures 2 to 5 The structure shown, see Figures 2 to 5 The second busbar 32 is located above the first busbar 31; the second lower terminal 322 is a connecting copper busbar, which is located below the second busbar 32 and behind the capacitor module 2, and the connecting copper busbar is also connected to the Hall device 4; the first upper terminal 311 and the first lower terminal 312 are respectively integrally formed with the first busbar 31; the second upper terminal 321 is integrally formed with the second busbar 32.

[0060] The first upper terminal 311 and the first lower terminal 312 are respectively formed integrally with the first busbar 31, and the second upper terminal 321 is formed integrally with the second busbar 32, which can improve the contact reliability of the first upper terminal 311, the first lower terminal 312, and the second upper terminal 321. The contact area of ​​each terminal after folding with other components is relatively large and the contact is closer, which can reduce contact resistance, reduce heat generation, improve the stability and reliability of electrical connection, and help the stable transmission of current, avoiding power failure, overheating and other problems caused by poor contact. It can also enhance the conductivity.

[0061] The second lower terminal 322 is a connecting copper bar, which is not integrated with the second busbar 32 and is mainly used to install the Hall device 4. The Hall device 4 is mainly used to accurately measure the current passing through the connecting copper bar. By real-time monitoring of the current change, the current information in the busbar circuit can be obtained.

[0062] In addition, the life detection of the capacitor module 2 usually requires understanding of the bus current. Because the capacitor module 2 generates heat when current passes through it, the magnitude and fluctuation of the current will affect the temperature change of the capacitor. Large currents or frequent current fluctuations may cause the capacitor temperature to rise too quickly, accelerating the aging and performance degradation of the capacitor. The current information detected by the Hall device 4 can be combined with factors such as the temperature characteristics of the capacitor module 2 to evaluate the life status of the capacitor module 2.

[0063] See also Figure 3 On the basis of the above embodiment, the connecting copper bar includes a first copper bar 3221 and a second copper bar 3222. One end of the first copper bar 3221 is connected to the second busbar 32, and the other end extends downward; one end of the second copper bar 3222 is connected to the extended end of the first copper bar 3221, and the other end is bent upward and connected to the lower row of power switch units 12; the second copper bar 3222 has a horizontal extension end, and the Hall device 4 is sleeved on the horizontal extension end.

[0064] Since the connecting copper bar is located below the second busbar 32 and behind the capacitor module 2, it will be blocked by the capacitor module 2. The connecting copper bar is designed as a split structure. Before installing the capacitor module 2, the assembly of the first copper bar 3221 and the second busbar 32, and the assembly of the second copper bar 3222 and the lower row of power switch units 12 can be completed independently. The above two copper bars are installed separately without being affected by the installation position, and then the first copper bar 3221 and the second copper bar 3222 are connected; similarly, when maintaining the capacitor module 2, the connecting copper bar can be disconnected by simply disconnecting the first copper bar 3221 and the second copper bar 3222, without disconnecting the second copper bar 3222 and the lower row of power switch units 12, thereby facilitating the connection and disconnection operations of the connecting copper bar.

[0065] In addition, the second copper bar 3222 is also used to install the Hall device 4. The Hall device 4 is mounted on the second copper bar 3222. On the one hand, the Hall device 4 does not need to be in direct contact with the second copper bar 3222, which avoids the influence of contact resistance or wear and other problems on the detection accuracy, and also reduces the interference with the current transmission of the copper bar, so that the current detection can be performed more stably. On the other hand, the copper bar is usually a carrier for large current transmission. By mounting the Hall device 4 on the copper bar, the Hall effect can be used to directly sense the current size passing through the connected copper bar. The Hall device 4 can accurately convert the current signal into a proportional voltage signal output, which provides a reliable way for current detection and facilitates real-time monitoring and control of the flow of current.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power component of a power supply equipment for a nuclear power plant, characterized in that: include: A power switch module (1) comprises an upper row of power switch units (11) and a lower row of power switch units (12) which are arranged correspondingly in the upper and lower rows; A capacitor module (2) is arranged directly in front of the lower row of power switch units (12); A stacked busbar (3) is arranged on the top surface of the capacitor module (2) and is electrically connected to the capacitor module (2); the stacked busbar (3) comprises a first busbar (31) and a second busbar (32) which are stacked up and insulated from each other; the first busbar (31) has a first upper terminal (311) folded upward and a first lower terminal (312) folded downward; the second busbar (32) has a second upper terminal (321) folded upward and a second lower terminal (322) folded downward; The first upper terminal (311) and the second upper terminal (321) are respectively electrically connected to the upper row power switch unit (11); and the first lower terminal (312) and the second lower terminal (322) are respectively electrically connected to the lower row power switch unit (12).

2. The power component of the power supply equipment for a nuclear power plant according to claim 1, characterized in that: The upper row of power switch units (11) and the lower row of power switch units (12) are symmetrically arranged along a first direction; the first upper terminal (311) and the first lower terminal (312) are arranged in an up-and-down staggered manner, the second upper terminal (321) and the second lower terminal (322) are arranged in an up-and-down staggered manner, and the first lower terminal (312) is located directly below the second upper terminal (321), and the second lower terminal (322) is located directly below the first upper terminal (311).

3. The power component of the power supply equipment for a nuclear power plant according to claim 2, characterized in that: Among the first upper terminal (311), the first lower terminal (312), the second upper terminal (321) and the second lower terminal (322), at least one is a lead-out terminal (33), and the others are in-line terminals; The lead-out terminal (33) comprises a lead-out portion (331) and a connecting portion (332); in the first direction, the lead-out portion (331) is located at the periphery of the straight-line terminals, and the connecting portion (332) corresponds vertically to one of the straight-line terminals.

4. The power assembly of the power supply equipment for a nuclear power plant according to claim 3, characterized in that: The lead-out portion (331) and the connecting portion (332) are arranged in an L shape.

5. The power assembly of power supply equipment for nuclear power plant according to claim 3, characterized in that: An insulating plate (34) is provided between the connecting portion (332) and the corresponding straight-row terminals above and below it; the insulating plate (34) is attached to the stacked busbar (3).

6. The power assembly of power supply equipment for nuclear power plant according to claim 3, characterized in that: The outer surface of the first busbar (31) is provided with a first outer insulating layer (35), the outer surface of the second busbar (32) is provided with a second outer insulating layer (36), and an intermediate insulating layer (37) is provided between the first busbar (31) and the second busbar (32).

7. The power assembly of the power supply equipment for a nuclear power plant according to claim 6, characterized in that: The first outer insulating layer (35) and the middle insulating layer (37) are both provided with a bending portion (38), or the second outer insulating layer (36) and the middle insulating layer (37) are both provided with a bending portion (38); The two bent portions (38) are respectively fitted with two side surfaces of the lead-out portion (331).

8. The power assembly of power supply equipment for nuclear power plant according to claim 1, characterized in that: The second busbar (32) is located above the first busbar (31); the second lower terminal (322) is a connecting copper busbar, the connecting copper busbar is located below the second busbar (32) and behind the capacitor module (2), and the connecting copper busbar is also connected to a Hall device (4); The first upper terminal (311) and the first lower terminal (312) are respectively integrally formed with the first busbar (31); and the second upper terminal (321) is integrally formed with the second busbar (32).

9. The power assembly of the power supply equipment for a nuclear power plant according to claim 8, characterized in that: The connecting copper busbar comprises: A first copper busbar (3221), one end of which is connected to the second busbar (32), and the other end of which extends downward; and The second copper bar (3222) has one end connected to the extended end of the first copper bar (3221), and the other end bent upward and connected to the lower row of power switch units (12); the second copper bar (3222) has a horizontally extended end, and the Hall device (4) is sleeved on the horizontally extended end.

10. The power assembly of power supply equipment for nuclear power plant according to claim 1, characterized in that: The upper row of power switch units (11) comprises a plurality of upper power switches spaced apart along a first direction, the lower row of power switch units (12) comprises a plurality of lower power switches spaced apart along the first direction, the plurality of upper power switches corresponding to the plurality of lower power switches one by one; The first busbar (31) has a first upper terminal (311) corresponding one-to-one to the plurality of upper power switches, and a first lower terminal (312) corresponding one-to-one to the plurality of lower power switches; The second busbar (32) has a second upper terminal (321) corresponding one-to-one to the plurality of upper power switches, and a second lower terminal (322) corresponding one-to-one to the plurality of lower power switches.

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