Energy router power unit and substation

Abstract

The present application discloses an energy router power unit and a substation, belonging to the field of electric power. The energy router power unit includes a separately packaged high-voltage input module and a low-voltage output module; the high-voltage input module includes a first shell, and a first rectifier module, an inverter module and a first DC support capacitor group connected in parallel in the first shell; the first input end and the second input end of the first rectifier module extend from the first shell, and the first output end and the second output end of the inverter module extend from the first shell; the low-voltage output module includes a second shell, a high-frequency transformer located in the second shell, a second rectifier module connected in parallel and a second DC support capacitor group; the first input end and the second input end of the high-frequency transformer extend from the second shell, and the first output end and the second output end of the second rectifier module extend from the second shell. According to the embodiments of the present application, the installation difficulty and maintenance difficulty of the energy router power unit can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of electric power, and in particular, relates to an energy router power unit and a substation. Background Art

[0002] With the development of power grid technology and the growth of demand for electric energy, the functional limitations of industrial frequency power transformers, as key equipment of the power grid, are becoming increasingly obvious, making it difficult to meet the development requirements of the power grid. Energy routers are a new type of controllable power transformer that combines power electronic conversion technology with medium and high frequency electromagnetic coupling technology. They can interconnect transmission and distribution networks of different voltage levels and meet the development requirements of the power grid.

[0003] The energy router can be composed of multiple packaged power units. The high-voltage input stage circuit, the intermediate isolation stage circuit and the low-voltage output stage circuit are packaged into one power unit. Since there are many circuits in the power unit and the power unit is large in size, the installation and maintenance of the power unit are more difficult. Summary of the invention

[0004] The embodiments of the present application provide an energy router power unit and a substation, which can reduce the difficulty of installing and maintaining the energy router power unit.

[0005] In a first aspect, an embodiment of the present application provides an energy router power unit, including a separately packaged high-voltage input module and a low-voltage output module;

[0006] The high-voltage input module includes a first housing, and a first rectifier module, an inverter module, and a first DC support capacitor group connected in parallel in the first housing; a first input end and a second input end of the first rectifier module extend from the first housing, and a first output end and a second output end of the inverter module extend from the first housing;

[0007] The low-voltage output module includes a second shell, a high-frequency transformer located in the second shell, and a second rectifier module and a second DC support capacitor group connected in parallel and located in the second shell; the first input end and the second input end of the high-frequency transformer extend from the second shell, and are respectively electrically connected to the first output end and the second output end of the inverter module, and the first output end and the second output end of the high-frequency transformer are respectively electrically connected to the first input end and the second input end of the second rectifier module, and the first output end and the second output end of the second rectifier module extend from the second shell.

[0008] In some possible embodiments, the high-voltage input module further includes a first air-cooling heat dissipation structure located in the first shell, and the first rectifier module and the inverter module are arranged on the back of the first air-cooling heat dissipation structure.

[0009] In some possible embodiments, the first air-cooled heat dissipation structure includes a first heat dissipation base and a plurality of first heat dissipation fins arranged on the first heat dissipation base; an air inlet is arranged on a first surface of the first shell body opposite to the first heat dissipation fins, and an air outlet is arranged on a second surface of the first shell body opposite to the first surface.

[0010] In some possible embodiments, the high-voltage input module also includes a first stacked busbar located in the first shell, the first stacked busbar is arranged parallel to the first heat dissipation base, the first stacked busbar is connected to the first DC support capacitor group, and the stacked busbar is electrically connected to the first rectifier module and the inverter module respectively.

[0011] In some possible embodiments, the low-voltage output module further includes a second air-cooling heat dissipation structure located in the second housing, and the second rectifier module is disposed on the back side of the second air-cooling heat dissipation structure.

[0012] In some possible embodiments, the second air-cooled heat dissipation structure includes a second heat dissipation base, and a plurality of second heat dissipation fins arranged on the second heat dissipation base; an air inlet is arranged on the first surface of the second shell body opposite to the second heat dissipation fins, and an air outlet is arranged on the second surface of the second shell body opposite to the first surface.

[0013] In some possible embodiments, the low-voltage output module also includes a second laminated busbar located in the second shell, the second laminated busbar is arranged parallel to the second heat dissipation base, the second laminated busbar is connected to the second DC support capacitor group, and the second laminated busbar is electrically connected to the second rectifier module.

[0014] In some possible embodiments, the first rectifier module includes two half-bridge IGBT device groups, and the inverter module includes two half-bridge IGBT device groups; the high-voltage input module also includes a first drive control circuit board group arranged on the side of the first rectifier module and the inverter module facing away from the first heat dissipation base.

[0015] In some possible embodiments, along the direction of the first rectifier module and the inverter module facing away from the first heat dissipation base, the first drive control circuit board group includes a first drive circuit board, a second drive circuit board and a first control circuit board which are stacked.

[0016] In some possible embodiments, the first driver circuit board includes first circuits corresponding to each half-bridge IGBT device group, and each first circuit is electrically connected to two first terminals on the first driver circuit board; the second driver circuit board includes isolation drivers corresponding to each half-bridge IGBT device group, and each isolation driver is electrically connected to two second terminals and one third terminal on the second driver circuit board, which are electrically connected to the first terminals and the second terminals corresponding to the same half-bridge IGBT device group; the first control circuit board includes a first control circuit, four fourth terminals electrically connected to the first control circuit, and a first communication port connected to the first control circuit, the fourth terminals are electrically connected to the third terminals one by one, and an opening corresponding to the first communication port is provided on the first shell.

[0017] In some possible embodiments, the high voltage input module further includes a first power supply, which is disposed adjacent to the first drive control circuit board group and is electrically connected to the first laminated busbar and the first control circuit board, respectively.

[0018] In some possible embodiments, the second rectifier module includes two half-bridge IGBT device groups; the low-voltage output module also includes a second drive control circuit board group arranged on a side of the second rectifier module facing away from the second heat dissipation base.

[0019] In some possible embodiments, along the direction of the second rectifier module facing away from the second heat dissipation base, the second drive control circuit board group includes a third drive circuit board, a fourth drive circuit board, and a second control circuit board that are stacked.

[0020] In some possible embodiments, the third driver circuit board includes second circuits corresponding to each half-bridge IGBT device group, and each second circuit is electrically connected to two fifth terminals on the third driver circuit board; the fourth driver circuit board includes isolation drivers corresponding to each half-bridge IGBT device group, and each isolation driver is electrically connected to two sixth terminals and one seventh terminal on the fourth driver circuit board, which are electrically connected to the fifth terminal and the sixth terminal corresponding to the same half-bridge IGBT device group; the second control circuit board includes a second control circuit, two eighth terminals electrically connected to the second control circuit, and a second communication port connected to the second control circuit, the eighth terminal is electrically connected to the seventh terminal one by one, and an opening corresponding to the second communication port is provided on the second shell.

[0021] In some possible embodiments, the low-voltage output module further includes a second power supply, which is disposed adjacent to the second drive control circuit board group, and is electrically connected to the second laminated busbar and the second control circuit board, respectively.

[0022] In some possible embodiments, the first input end and the second input end of the high-frequency transformer extending out of the second housing are covered with isolation sheds.

[0023] In a second aspect, an embodiment of the present application provides an energy router substation, comprising an outer shell, a supporting structure arranged in the outer shell, a three-phase reactor, a control cabinet, a three-phase power unit group arranged on the supporting structure, and a heat exchange fan; the heat exchange fan is arranged on a first surface of the outer shell opposite to the three-phase power unit group, and an air inlet is arranged on a second surface of the outer shell opposite to the first surface;

[0024] Each phase power unit group includes N energy router power units in the first aspect, where N is an integer greater than or equal to 2.

[0025] In some possible embodiments, the first phase power unit group, the second phase power unit group, the third phase power unit group, and the three-phase reactor are arranged in sequence; and the energy router power units in each phase power unit group are arranged in two columns.

[0026] In some possible embodiments, in each phase power unit group, the first input end of the first rectifier module in the first high-voltage input module is electrically connected to the corresponding one-phase reactor, and the first input end of the first rectifier module in the i-th high-voltage input module is electrically connected to the second input end of the first rectifier module in the i-1-th high-voltage input module through a first connecting bar, 1<i≤N;

[0027] The second input end of the first rectifier module in the Nth high-voltage input module of each phase power unit group is electrically connected through the second connecting bar, the first output end of the second rectifier module in the low-voltage output module of each phase power unit group is electrically connected through the third connecting bar, the third connecting bar is electrically connected to the positive DC bus, and the second output end of the second rectifier module in the low-voltage output module of each phase power unit group is electrically connected through the fourth connecting bar, and the fourth connecting bar is electrically connected to the negative DC bus.

[0028] In some possible embodiments, a fan mounting opening is provided on the first surface of the outer shell opposite to the three-phase power unit group, the heat exchange fan is installed at the fan mounting opening, and an air guide cover is also provided at the fan mounting opening outside the outer shell.

[0029] In some possible embodiments, the air inlet is equipped with a shutter.

[0030] In some possible embodiments, the support structure includes an upper support and a lower support, the high voltage input module in the energy router power unit is arranged on the upper support, and the low voltage input module in the energy router power unit is arranged on the lower support.

[0031] In some possible embodiments, the upper support is an insulating support.

[0032] In some possible embodiments, the support structure further includes a support base, and the support base is located below the lower support.

[0033] In some possible embodiments, a plurality of bushings passing through the outer shell are provided on the outer shell, and each of the three-phase high-voltage incoming lines enters the outer shell through a bushing and is electrically connected to the corresponding single-phase inductor, the positive DC bus enters the outer shell through a bushing and is electrically connected to the first output end of the second rectifier module in each low-voltage output module, and the negative DC bus enters the outer shell through a bushing and is electrically connected to the second output end of the second rectifier module in each low-voltage output module.

[0034] In some possible embodiments, the first communication port in the high voltage input module in each phase power unit group is connected to the control cabinet via a first communication link, and the second communication port in the low voltage output module in each phase power unit group is connected to the control cabinet via a second communication link.

[0035] The embodiment of the present application provides an energy router power unit and a substation, wherein the energy router power unit includes a separately packaged high-voltage input module and a low-voltage output module. The high-voltage input module is packaged with a first rectifier module, an inverter module, and a first DC support capacitor group. The first input end and the second input end of the first rectifier module in the high-voltage input module extend from the first shell. The first output end and the second output end of the inverter module in the high-voltage input module extend from the first shell and are respectively electrically connected to the first input end and the second input end of the high-frequency transformer in the low-voltage output module. The low-voltage output module is packaged with a high-frequency transformer, a second rectifier module, and a second DC support capacitor group. The first output end and the second output end of the second rectifier module in the low-voltage output module extend from the second shell. The high-voltage input module and the low-voltage output module are separately packaged, which realizes the modular design of the energy router power unit and reduces the difficulty of installation and maintenance of the energy router power unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 A schematic diagram of the electrical structure of an embodiment of the energy router power unit provided by the present application;

[0038] Figure 2 A schematic diagram of the electrical structure of an embodiment of the energy router provided by the present application;

[0039] Figure 3A schematic diagram of the structure of an embodiment of the energy router power unit provided by the present application;

[0040] Figure 4 A structural diagram of an example of the internal structure of a high-voltage input module and the internal structure of a low-voltage output module provided in an embodiment of the present application;

[0041] Figure 5 A schematic structural diagram of an example of at least a partial structure of the internal part of the high-voltage input module provided in an embodiment of the present application;

[0042] Figure 6 for Figure 4 An exemplary structural diagram of the first drive control circuit board group, the first rectifier module and the inverter module in the high-voltage input module after being separated;

[0043] Figure 7 A structural block diagram of an example of a first drive control circuit board group provided in an embodiment of the present application;

[0044] Figure 8 for Figure 4 A structural schematic diagram of the internal structure of the low-voltage output module from another angle shown;

[0045] Fig. 9 for Figure 4 The internal structure of the low-voltage output module and the schematic diagram of the second drive control circuit board group and the second rectifier module after being disassembled are shown;

[0046] Fig.10 A structural block diagram of an example of a second drive control circuit board group provided in an embodiment of the present application;

[0047] Fig.11 A schematic diagram of the structure of an embodiment of an energy router substation provided by the present application;

[0048] Fig.12 for Fig.11 The schematic structural diagram of the energy router substation from another angle is shown;

[0049] Fig.13 for Fig.11 and Fig.12 A schematic cross-sectional structure diagram of an energy router substation is shown;

[0050] Fig.14 A schematic structural diagram of an example of a three-phase power unit group provided in an embodiment of the present application;

[0051] Fig.15 for Fig.14 A partial structural schematic diagram of a three-phase power unit group shown;

[0052] Fig.16 A schematic diagram of an example of connection of an energy router power unit in a three-phase power unit group provided in an embodiment of the present application;

[0053] Fig.17 A schematic structural diagram of an example of a support structure provided in an embodiment of the present application;

[0054] Fig.18 A schematic diagram of an example of a fiber optic communication link between a fiber optic transceiver and a control cabinet provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0056] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0057] Energy router is a new type of controllable power transformer that combines power electronic conversion technology with medium and high frequency electromagnetic coupling technology. It can interconnect transmission and distribution networks of different voltage levels, and can also provide plug-and-play interfaces for distributed power sources and energy storage devices. Energy routers can also realize continuous on-load voltage regulation, power quality control, two-level grid flexible connector, grid decoupling control, short-circuit current blocker, high and low voltage double-sided static synchronous compensator (STATCOM), self-healing safety device, safety and stability system execution terminal, new energy grid connection interface and other functions. Due to the above advantages, the application scope of energy routers is becoming more and more extensive.

[0058] The energy router can be composed of multiple packaged power units. The high-voltage input stage circuit, the intermediate isolation stage circuit and the low-voltage output stage circuit are packaged into one power unit. However, due to the complex circuit structure and the large number of components, the power unit is large in size, making it difficult to install and maintain.

[0059] The present application provides an energy router power unit and a substation, which encapsulates a high-voltage input stage circuit into one module, and encapsulates an intermediate isolation stage circuit and a low-voltage output stage circuit into another module. That is, the energy router power unit is implemented as a separate structure, thereby reducing the difficulty of installation and maintenance.

[0060] The following describes the power unit of the energy router and the electrical structure of the energy router. The energy router in the embodiment of the present application is an AC-DC energy router, and correspondingly, the power unit of the energy router is an AC-DC energy router power unit.

[0061] Figure 1 This is a schematic diagram of the electrical structure of an embodiment of the energy router power unit provided in this application. Figure 1 As shown, the energy router power unit may include a high voltage input stage circuit, an intermediate isolation stage circuit and a low voltage output stage circuit. The high voltage input stage circuit is packaged as a high voltage input module 11, and the intermediate isolation stage circuit and the low voltage output stage circuit are packaged as a low voltage output module 12.

[0062] The high voltage input module 11 includes a first rectifier module, an inverter module and a first DC support capacitor group connected in parallel. The first rectifier module 111 includes two half-bridge insulated gate bipolar transistor (IGBT) device groups 113. The inverter module 112 includes two half-bridge IGBT device groups 113. Each half-bridge IGBT device group 113 includes two IGBT devices connected in series. For example, Figure 1 As shown, the first rectifier module 111 includes IGBT devices T1, T2, T3 and T4, and the inverter module 112 includes IGBT devices T5, T6, T7 and T8. The connection method of the IGBT devices in the first rectifier module 111 and the inverter module 112 is as follows: Figure 1 The first DC support capacitor group in the high voltage input module 11 may include more than one capacitor, and the number and capacitance of the capacitors in the first DC support capacitor group are not limited here. Figure 1 As shown, the first DC support capacitor group in the high-voltage input module 11 includes a capacitor C1.

[0063] The low voltage output module 12 includes a high frequency transformer M1, and a second rectifier module 121 and a second DC support capacitor group connected in parallel. The high frequency transformer M1 can be specifically a high isolation high frequency transformer M1, and the isolation voltage level of the high frequency transformer M1 can be determined according to the voltage level of the input side (i.e., the high voltage side) of the high voltage input module 11, which is not limited here. For example, the distribution network voltage on the input side of the high voltage input module 11 is 10KV, i.e., 10 kilovolts, and correspondingly, the isolation voltage level of the high frequency transformer M1 can be determined according to 10KV.

[0064] The second rectifier module 121 includes two half-bridge IGBT device groups 122. Each half-bridge IGBT device group 122 includes two IGBT devices connected in series. Figure 1 As shown, the second rectifier module 121 includes IGBT devices T9, T10, T11 and T12. The connection method of the IGBT devices in the second rectifier module 121 is as follows: Figure 1 The second DC support capacitor group in the low voltage output module 12 may include more than one capacitor, and the number and capacitance of the capacitors in the second DC support capacitor group are not limited here. Figure 1 As shown, the second DC support capacitor group in the low voltage output module 12 includes a capacitor C2.

[0065] Figure 2 This is a schematic diagram of the electrical structure of an embodiment of the energy router provided by the present application. Figure 2 As shown, the energy router may include a three-phase power unit group. Each phase power unit group includes more than two energy router power units.

[0066] like Figure 2 As shown, in a one-phase power unit group, the first input end of the first energy router power unit can be connected to one phase of the high-voltage side power grid through a reactor, the second input end of the first energy router power unit is connected to the first input end of the second energy router power unit, the second input end of the second energy router power unit is connected to the first input end of the third energy router power unit, and so on. Figure 2 In the first phase power unit group, the first input end of the first energy router power unit is connected to the first phase of the high-voltage side power grid through the first phase reactor L1. In the second phase power unit group, the first input end of the first energy router power unit is connected to the second phase of the high-voltage side power grid through the second phase reactor L2. In the third phase power unit group, the first input end of the first energy router power unit is connected to the third phase of the high-voltage side power grid through the third phase reactor L3.

[0067] The second input terminal of the last energy router power unit in each phase power unit group is connected to form a neutral point on the high voltage side. The first output terminal of each energy router power unit in each phase power unit group is connected to the positive DC bus, and the second output terminal of each energy router power unit in each phase power unit group is connected to the negative DC bus.

[0068] The inputs of the energy router power units in the power unit group are connected in series, which can increase the voltage level of the energy router. The outputs of the energy router power units in the power unit group are connected in parallel, which can increase the current level of the energy router. The number of energy router power units in the power unit group can be determined according to the voltage level of the energy router power unit and the voltage level of the grid side, and is not limited here.

[0069] The specific structure of the energy router power unit is introduced below. Figure 3 This is a schematic diagram of the structure of an embodiment of the energy router power unit provided by the present application. Figure 3 As shown, the energy router power unit includes a separately packaged high-voltage input module 11 and a low-voltage output module 12. In the installed state, the energy router power unit can be vertically installed in two layers. Among them, the high-voltage input module 11 is installed on the upper layer, and the low-voltage output module 12 is installed on the lower layer. The mechanical force of the high-voltage input module 11 can be borne by the support of the power cabinet in which the energy router power unit is installed. The high-voltage input module 11 is connected to the low-voltage output module 12. The connection between the high-voltage input module 11 and the low-voltage output module 12 can be a detachable connection for easy maintenance.

[0070] Figure 4 This is a schematic diagram of an example of the internal structure of the high voltage input module and the internal structure of the low voltage output module provided in the embodiment of the present application. Figure 3 and Figure 4 As shown, the high-voltage input module 11 includes a first housing 211, a first rectifier module 111, an inverter module 112, and a first DC support capacitor group 114 connected in parallel in the first housing 211. The first input end 212 and the second input end 213 of the first rectifier module 111 extend from the first housing 211, and the first input end 212 of the first rectifier module 111 can be used as the first input end of the high-voltage input module 11, and the second input end 213 of the first rectifier module 111 can be used as the second input end of the high-voltage input module 11. The first output end 214 and the second output end 215 of the inverter module 112 extend from the first housing 211, and the first output end 214 of the inverter module 112 can be used as the first output end of the high-voltage input module 11, and the second output end 215 of the inverter module 112 can be used as the second output end of the high-voltage input module 11. The first output end of the first rectifier module 111 is connected to the first input end of the inverter module 112 , and the second output end of the first rectifier module 111 is connected to the second input end of the inverter module 112 .

[0071] In some examples, the high voltage input module 11 further includes a first air-cooling heat dissipation structure located in the first housing 211. The first rectifier module 111 and the inverter module 112 are disposed on the back of the first air-cooling heat dissipation structure. The first air-cooling heat dissipation structure can be used to dissipate heat for the first rectifier module 111 and the inverter module 112.

[0072] Specifically, the first air-cooled heat dissipation structure may include a first heat dissipation base 216, and a plurality of first heat dissipation fins 217 disposed on the first heat dissipation base 216. The heat generated by the first rectifier module 111 and the inverter module 112 may be transferred to the first heat dissipation fins 217 through the first heat dissipation base 216, and the first heat dissipation fins 217 expand the heat dissipation area and dissipate the heat into the air.

[0073] An air inlet 218 is disposed on a first surface of the first housing 211 opposite to the first heat dissipation fins 217, and an air outlet is disposed on a second surface opposite to the first surface. Specifically, the air inlet 218 on the first surface of the first housing 211 may include a plurality of fine openings arranged in an array, and the air outlet on the second surface of the first housing 211 may include a plurality of fine openings arranged in an array. Figure 3 The figure shows an air inlet 218 disposed on the first surface of the first housing 211, and an air outlet is disposed opposite to this surface, which is not shown in the figure. In the installed state, the extension direction of the first heat dissipation fins 217 is the horizontal direction. The wind entering from the air inlet 218 can blow through the first heat dissipation fins 217, pass through the gaps between the first heat dissipation fins 217, and take away the heat of the first heat dissipation fins 217. The wind with heat is then discharged from the air outlet to take the heat away from the high-voltage input module 11. That is, the wind can pass through the air inlet 218, the gaps between the first heat dissipation fins 217, and the air outlet in sequence to take the heat away from the high-voltage input module 11. Figure 4 The dashed arrow in the figure indicates the direction of the wind.

[0074] In some examples, the high-voltage input module 11 further includes a first laminated busbar 219 located in the first housing 211. The first laminated busbar 219 may specifically include a laminated positive busbar and a negative busbar. The first laminated busbar 219 is arranged in parallel with the first heat dissipation base 216. The first laminated busbar 219 is connected to the first DC support capacitor group 114, and is electrically connected to the first rectifier module 111 and the inverter module 112. The first laminated busbar 219 realizes the parallel connection of the first rectifier module 111, the inverter module 112, and the first DC support capacitor group 114, thereby realizing a compact design.

[0075] Figure 5 A schematic structural diagram of an example of at least a partial structure inside a high-voltage input module provided in an embodiment of the present application. Figure 5The first rectifier module 111 and the inverter module 112 in the high voltage input module 11 and the half-bridge IGBT device group 113 in the first rectifier module 111 and the inverter module 112 are shown. The first rectifier module 111 and the inverter module 112 are arranged on the back of the first heat dissipation base 216.

[0076] The high voltage input module 11 may further include a first drive control circuit board group disposed on a side of the first rectifier module 111 and the inverter module 112 facing away from the first heat dissipation base 216 . Figure 6 for Figure 4 The schematic diagram of an example structure of the first drive control circuit board group, the first rectifier module and the inverter module in the high-voltage input module after being separated. Figure 6 As shown, along the direction of the first rectifier module 111 and the inverter module 112 facing away from the heat dissipation base, the first drive control circuit board group may include a first drive circuit board 221, a second drive circuit board 222 and a first control circuit board 223 which are stacked.

[0077] like Figure 4 and Figure 6 As shown, in the installed state, the first drive circuit board 221, the second drive circuit board 222 and the first control circuit board 223 are installed vertically. They are arranged in order from near to far from the first rectifier module 111 and the inverter module 112, namely the first drive circuit board 221, the second drive circuit board 222 and the first control circuit board 223.

[0078] The first driving circuit board 221 is electrically connected to the half-bridge IGBT device group 113 in the first rectifier module 111 and the half-bridge IGBT device group 113 in the inverter module 112. The second driving circuit board 222 is electrically connected to the first driving circuit board 221. The first control circuit board 223 is electrically connected to the second driving circuit board 222. The first driving circuit board 221, the second driving circuit board 222 and the first control circuit board 223 jointly realize the driving, control and protection of the first rectifier module 111, the inverter module 112 and the like.

[0079] In some examples, the first driver circuit board 221 can be welded to the auxiliary connection terminals of the half-bridge IGBT device group 113 in the first rectifier module 111 and the half-bridge IGBT device group 113 in the inverter module 112 through the pads on the first driver circuit board 221.

[0080] In order to facilitate the description of the connection relationship among the first driving circuit board 221 , the second driving circuit board 222 and the first control circuit board 223 , the structure block diagram of the first driving circuit board 221 , the second driving circuit board 222 and the first control circuit board 223 is used for description. Figure 7This is a structural block diagram of an example of the first drive control circuit board group provided in the embodiment of the present application, wherein double arrow lines are used to indicate the connection relationship between the components.

[0081] like Figure 6 and Figure 7 As shown, the first driving circuit board 221 includes first circuits 224 corresponding to the respective half-bridge IGBT device groups. Each first circuit 224 is electrically connected to two first terminals 225 on the first driving circuit board 221. That is, each half-bridge IGBT device group 113 in the high-voltage input module 11 corresponds to two first terminals 225. One of the two first terminals 225 is an upper bridge arm terminal, and the other is a lower bridge arm terminal. The upper bridge arm terminal is connected to the portion of the first circuit 224 related to the upper bridge arm IGBT device in the half-bridge IGBT device group 113, and the lower bridge arm terminal is connected to the portion of the first circuit 224 related to the lower bridge arm IGBT device in the half-bridge IGBT device group 113. The first circuit 224 and the corresponding first terminal 225 can be connected through the plate making circuit on the first driving circuit board 221. Other circuits can also be provided on the first driving circuit board 221, which are not limited here. The first driving circuit board 221 can be integrally welded to the half-bridge IGBT device group 113 in the first rectifier module 111 and the half-bridge IGBT device group 113 in the inverter module 112 .

[0082] The second driving circuit board 222 includes an isolation driver 227 corresponding to each half-bridge IGBT device group. Each isolation driver 227 is electrically connected to two second wiring terminals 226 and one third wiring terminal 228 on the second driving circuit board 222. That is, each half-bridge IGBT device group 113 in the high-voltage input module 11 corresponds to two second wiring terminals 226 and one third wiring terminal 228. The first wiring terminal 225 and the second wiring terminal 226 corresponding to the same half-bridge IGBT device group 113 are electrically connected. One of the two second wiring terminals 226 corresponding to a half-bridge IGBT device group 113 is an upper bridge arm wiring terminal, and the other is a lower bridge arm wiring terminal. Corresponding to the same half-bridge IGBT device group 113, the upper bridge arm wiring terminal in the first driving circuit board 221 is electrically connected to the upper bridge arm wiring terminal in the second driving circuit board 222, and the lower bridge arm wiring terminal in the first driving circuit board 221 is electrically connected to the lower bridge arm wiring terminal in the second driving circuit board 222. The third wiring terminal 228 may include a horn terminal, which is not limited here. The isolation driver 227 on the second driving circuit board 222 can be connected to the corresponding second connection terminal 226 and third connection terminal 228 through the plate-making circuit on the second driving circuit board 222. Other circuits can also be arranged on the second driving circuit board 222, which are not limited here.

[0083] The first control circuit board 223 includes a first control circuit 230, four fourth wiring terminals 229 electrically connected to the first control circuit 230, and a first communication port connected to the first control circuit 230. The fourth wiring terminals 229 are electrically connected to the third wiring terminals 228 one by one. A power supply terminal 231 may also be provided on the first control circuit board 223, and the power supply terminal 231 is used to connect a power supply end, which may be specifically implemented as a power supply, which is not limited here. The first control circuit board 223 may also include isolation drivers corresponding to each half-bridge IGBT device group in the first rectifier module 111 and each half-bridge IGBT device group in the inverter module 112, which are not shown in the figure. An opening corresponding to the first communication port may be provided on the first shell 211. As Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the first communication port may include a fiber optic transceiver and other types of communication connectors 233, which are not limited here. The fiber optic transceiver 232 can be divided into a fiber optic receiver 232-1 and a fiber optic transmitter 232-2. The fiber optic transceiver 232 can exchange information with the control system. In the installed state, the fiber optic receiver 232-1 and the fiber optic transmitter 232-2 can be installed vertically and extend out of the first housing 211. The isolation driver, the fourth terminal 229, the first communication interface and other structures on the first control circuit board 223 can be connected through a plate-making circuit. Other circuits may also be provided on the first control circuit board 223, which are not limited here.

[0084] The circuits on the first driving circuit board 221 include driving circuits, protection circuits, detection circuits, etc. with strong anti-interference capabilities. The circuits on the second driving circuit board 222 include driving circuits, control circuits, feedback short-circuit designs, etc. with weak anti-interference capabilities. It should be noted that the strong and weak anti-interference here are relative. The separate design of the first driving circuit board 221 and the second driving circuit board 222 can effectively isolate strong and weak electricity, thereby improving the reliability of the operation of the IGBT devices in the half-bridge IGBT device group. Moreover, the distance between the first driving circuit board 221, the second driving circuit board 222 and the first control circuit board 223 is short, the wiring is simple, the complexity of wiring is reduced, and the wiring process is optimized.

[0085] The first rectifier module 111, the inverter module 112, the first DC support capacitor group 114 and the first drive circuit board 221 in the above embodiment can be used as the power part in the high-voltage input module 11, and the second drive circuit board 222 and the first control circuit board 223 can be used as the control part in the high-voltage input module 11.

[0086] In some examples, such as Figure 4As shown, the high-voltage input module 11 may also include a first power supply 234. The first power supply 234 is arranged adjacent to the first drive control circuit board group. The first power supply 234 is electrically connected to the first stack busbar 219 and the first control circuit board 223, respectively. In the installed state, the first power supply 234 is located above the first drive control circuit board group. The power input of the first power supply 234 comes from the first stack busbar 219, and takes power from the DC bus. The wiring between the first power supply 234 and the first stack busbar 219 is short, and the reliability is high. The first power supply 234 supplies power to the first control circuit board 223, and can also supply power to other parts of the high-voltage input module 11 that need electricity through the first control circuit board 223. The wiring between the first power supply 234 and the first control circuit board 223 is short, and the reliability is high.

[0087] like Figure 3 and Figure 4 As shown, the low voltage output module 12 includes a second housing 311 , a high frequency transformer M1 located in the second housing 311 , and a second rectifier module 121 and a second DC link capacitor group 123 connected in parallel and located in the second housing 311 .

[0088] The first input terminal 312 and the second input terminal 313 of the high-frequency transformer M1 extend from the second housing 311. The first input terminal 312 of the high-frequency transformer M1 can be used as the first input terminal of the low-voltage output module 12, and the second input terminal 313 of the high-frequency transformer M1 can be used as the second input terminal of the low-voltage output module 12. The first output terminal 314 and the second output terminal 315 of the second rectifier module 121 extend from the second housing 311. The first output terminal 314 of the second rectifier module 121 can be used as the first output terminal of the low-voltage output module 12, and the second output terminal 315 of the second rectifier module 121 can be used as the second output terminal of the low-voltage output module 12. The first input terminal 312 and the second input terminal 313 of the high-frequency transformer M1 are respectively electrically connected to the first output terminal 214 and the second output terminal 215 of the inverter module 112 in the high-voltage input module 11. The first output terminal 321 and the second output terminal 322 of the high-frequency transformer M1 are respectively electrically connected to the first input terminal 323 and the second input terminal 324 of the second rectifier module 121. Specifically, the first input terminal 312 of the high-frequency transformer M1 is electrically connected to the first output terminal 214 of the inverter module 112, and the second input terminal 313 of the high-frequency transformer M1 is electrically connected to the second output terminal 215 of the inverter module 112. The first output terminal 321 of the high-frequency transformer M1 is electrically connected to the first input terminal 323 of the second rectifier module 121, and the second output terminal 322 of the high-frequency transformer M1 is electrically connected to the second input terminal 324 of the second rectifier module 121.

[0089] In some examples, such as Figure 3As shown, the first input end 312 and the second input end 313 of the high-frequency transformer M1 extending out of the second housing 311 are covered with an isolation shed 320. The first input end 312 and the second input end 313 of the high-frequency transformer M1 are connected to the high-voltage input module 11, and the isolation shed 320 can increase the creepage distance between the circuit, wiring, etc. in the high-voltage input module 11 and the high-frequency transformer M1, and can also increase the creepage distance between the circuit, wiring, etc. in the high-voltage input module 11 and the second housing 311, thereby improving the safety and reliability of the power unit of the energy router.

[0090] Figure 8 for Figure 4 The schematic diagram of the internal structure of the low-voltage output module from another angle is shown. Figure 3 , Figure 4 and Figure 8 As shown, in some examples, the low voltage output module 12 further includes a second air-cooling heat dissipation structure located in the second housing 311. The second rectifier module 121 is disposed on the back of the second air-cooling heat dissipation structure. The second air-cooling heat dissipation structure can be used to dissipate heat for the second rectifier module 121.

[0091] Specifically, the second air-cooled heat dissipation structure may include a second heat dissipation base 316, and a plurality of second heat dissipation fins 317 disposed on the second heat dissipation base 316. The heat generated by the second rectifier module 121 may be transferred to the second heat dissipation fins 317 through the second heat dissipation base 316. The second heat dissipation fins 317 expand the heat dissipation area and dissipate the heat into the air.

[0092] An air inlet 318 is disposed on a first surface of the second housing 311 opposite to the second heat dissipation fins 317, and an air outlet is disposed on a second surface of the second housing 311 opposite to the first surface. Specifically, the air inlet 318 on the first surface of the second housing 311 may include a plurality of fine openings arranged in an array, and the air outlet on the second surface of the second housing 311 may include a plurality of fine openings arranged in an array. Figure 3 The figure shows an air inlet 318 disposed on one side of the second housing 311, and an air outlet is disposed opposite to this side, which is not shown in the figure. In the installed state, the extension direction of the second heat dissipation fins 317 is the horizontal direction. The wind entering from the air inlet 318 can blow through the second heat dissipation fins 317, pass through the gaps between the second heat dissipation fins 317, and take away the heat of the second heat dissipation fins 317. The wind with heat is then discharged from the air outlet to take the heat away from the low-voltage output module 12. That is, the wind can pass through the air inlet 318, the gaps between the second heat dissipation fins 317, and the air outlet in sequence to take the heat away from the low-voltage output module 12. Figure 4 The dashed arrow in the figure indicates the direction of the wind.

[0093] In some examples, the low-voltage output module 12 also includes a second laminated busbar 319 located in the second housing 311. The second laminated busbar 319 may specifically include a laminated positive busbar and a negative busbar. The positive busbar in the second laminated busbar 319 is a DC positive busbar, and the negative busbar in the second laminated busbar 319 is a DC negative busbar. The second laminated busbar 319 is arranged in parallel with the second heat dissipation base 316, and the second laminated busbar 319 is connected to the second DC support capacitor group 123, and is electrically connected to the second rectifier module 121. The second laminated busbar 319 realizes the parallel connection of the second rectifier module 121 and the second DC support capacitor group 123, thereby realizing a compact design.

[0094] In some examples, the second rectifier module 121 in the low voltage output module 12 includes two half-bridge IGBT device groups 122. The low voltage output module 12 may also include a second drive control circuit board group disposed on the side of the second rectifier module 121 facing away from the second heat sink 316. Specifically, the second drive control circuit board group may include a third drive circuit board 331, a fourth drive circuit board 332, and a second control circuit board 333.

[0095] Fig. 9 for Figure 4 The internal structure of the low-voltage output module and the schematic diagram of the second drive control circuit board group and the second rectifier module after being disassembled are shown. Fig. 9 As shown, along the direction of the second rectifier module 121 facing away from the second heat dissipation base 316, the second drive control circuit board group includes a third drive circuit board 331, a fourth drive circuit board 332, and a second control circuit board 333 arranged in a stacked manner. In the installed state, the third drive circuit board 331, the fourth drive circuit board 332, and the second control circuit board 333 are installed vertically. They are arranged in order from near to far from the second rectifier module 121, namely the third drive circuit board 331, the fourth drive circuit board 332, and the second control circuit board 333.

[0096] The third driving circuit board 331 is electrically connected to the half-bridge IGBT device group 122 in the second rectifier module 121. The fourth driving circuit board 332 is electrically connected to the third driving circuit board 331. The second control circuit board 333 is electrically connected to the fourth driving circuit board 332. The third driving circuit board 331, the fourth driving circuit board 332 and the second control circuit board 333 jointly realize the driving, control, protection, etc. of the second rectifier module 121, etc.

[0097] In some examples, the third driving circuit board 331 can be welded and connected to the auxiliary connection terminals of the half-bridge IGBT device group 122 in the second rectifier module 121 through the pads on the third driving circuit board 331 .

[0098] In order to facilitate the description of the connection relationship among the third driving circuit board 331 , the fourth driving circuit board 332 and the second control circuit board 333 , the structure block diagram of the third driving circuit board 331 , the fourth driving circuit board 332 and the second control circuit board 333 is used for description. Fig.10 This is a structural block diagram of an example of a second drive control circuit board group provided in an embodiment of the present application, wherein double arrow lines are used to indicate the connection relationship between the components.

[0099] like Fig. 9 and Fig.10 As shown, the third driving circuit board 331 includes a second circuit 334 corresponding to each half-bridge IGBT device group 122. Each second circuit 334 is electrically connected to two fifth wiring terminals 335 on the third driving circuit board 331. That is, each half-bridge IGBT device group 122 in the low-voltage output module 12 corresponds to two fifth wiring terminals 335. One of the two fifth wiring terminals 335 is an upper bridge arm wiring terminal, and the other is a lower bridge arm wiring terminal. The upper bridge arm wiring terminal is connected to the part of the second circuit 334 related to the upper bridge arm IGBT device in the half-bridge IGBT device group 122, and the lower bridge arm wiring terminal is connected to the part of the second circuit 334 related to the lower bridge arm IGBT device in the half-bridge IGBT device group 122. The second circuit 334 and the corresponding fifth wiring terminal 335 can be connected through the plate-making circuit on the third driving circuit board 331. Other circuits can also be provided on the third driving circuit board 331, which are not limited here. The third driving circuit board 331 can be welded and connected to the half-bridge IGBT device group 122 in the second rectifier module 121.

[0100] The fourth driving circuit board 332 includes an isolation driver 337 corresponding to each half-bridge IGBT device group 122. Each isolation driver 337 is electrically connected to two sixth wiring terminals 336 and one seventh wiring terminal 338 on the fourth driving circuit board 332. That is, each half-bridge IGBT device group 122 in the low-voltage output module 12 corresponds to two sixth wiring terminals 336 and one seventh wiring terminal 338. The fifth wiring terminal 335 and the sixth wiring terminal 336 corresponding to the same half-bridge IGBT device group 122 are electrically connected. One of the two sixth wiring terminals 336 corresponding to a half-bridge IGBT device group 122 is an upper bridge arm wiring terminal, and the other is a lower bridge arm wiring terminal. Corresponding to the same half-bridge IGBT device group 122, the upper bridge arm wiring terminal in the third driving circuit board 331 is electrically connected to the upper bridge arm wiring terminal in the fourth driving circuit board 332, and the lower bridge arm wiring terminal in the third driving circuit board 331 is electrically connected to the lower bridge arm wiring terminal in the fourth driving circuit board 332. The seventh wiring terminal 338 may include a horn terminal, which is not limited here. The isolation driver 337 on the fourth driving circuit board 332 and the corresponding sixth terminal 336 and seventh terminal 338 can be connected through the plate-making circuit on the fourth driving circuit board 332. Other circuits can also be arranged on the fourth driving circuit board 332, which are not limited here.

[0101] The second control circuit board 333 includes a second control circuit 340, two eighth wiring terminals 339 electrically connected to the second control circuit 340, and a second communication port connected to the second control circuit 340. The eighth wiring terminal 339 is electrically connected to the seventh wiring terminal 338 in a one-to-one correspondence. A power supply terminal 341 may also be provided on the second control circuit board 333, and the power supply terminal 341 is used to connect a power supply end, which may be specifically implemented as a power supply, which is not limited here. The second control circuit board 333 may also include an isolation driver corresponding to each half-bridge IGBT device group 122 in the second rectifier module 121, which is not shown in the figure. An opening corresponding to the second communication port may be provided on the second housing 311. As shown Figure 3 , Figure 4 , Fig. 9 and Fig.10 As shown, the second communication port may include a fiber optic transceiver 342 and other types of communication connectors 343, which are not limited here. The fiber optic transceiver 342 can be divided into a fiber optic receiver 342-1 and a fiber optic transmitter 342-2. The fiber optic transceiver 342 can exchange information with the control system. In the installed state, the fiber optic receiver 342-1 and the fiber optic transmitter 342-2 can be installed vertically and extend out of the second housing 311. The isolation driver, the eighth terminal 339, the second communication interface and other structures on the second control circuit board 333 can be connected through a plate-making circuit. Other circuits can also be provided on the second control circuit board 333, which are not limited here.

[0102] The circuits on the third drive circuit board 331 include drive circuits, protection circuits, detection circuits, etc. with strong anti-interference capabilities. The circuits on the fourth drive circuit board 332 include drive circuits, control circuits, feedback short-circuit designs, etc. with weak anti-interference capabilities. It should be noted that the strong and weak anti-interference here are relative. The separate design of the third drive circuit board 331 and the fourth drive circuit board 332 can effectively isolate strong and weak electricity, thereby improving the reliability of the operation of the IGBT devices in the half-bridge IGBT device group 122. Moreover, the distances between the third drive circuit board 331, the fourth drive circuit board 332 and the second control circuit board 333 are short, the wiring is simple, the complexity of wiring is reduced, and the wiring process is optimized.

[0103] In the above embodiment, the second rectifier module 121, the second DC support capacitor group 123 and the third drive circuit board 331 can be used as the power part in the low-voltage output module 12, and the fourth drive circuit board 332 and the second control circuit board 333 can be used as the control part in the low-voltage output module 12.

[0104] In some examples, such as Figure 4 As shown, the low-voltage output module 12 may also include a second power supply 344. The second power supply 344 is arranged adjacent to the second drive control circuit board group. The second power supply 344 is electrically connected to the second laminated busbar 319 and the second control circuit board 333, respectively. In the installed state, the second power supply 344 is located above the second drive control circuit board group. The power input of the second power supply 344 comes from the second laminated busbar 319, and takes power from the DC bus. The wiring between the second power supply 344 and the second laminated busbar 319 is short, and the reliability is high. The second power supply 344 supplies power to the second control circuit board 333, and can also supply power to other parts of the low-voltage output module 12 that need electricity through the second control circuit board 333. The wiring between the second power supply 344 and the second control circuit board 333 is short, and the reliability is high.

[0105] In the embodiment of the present application, the energy router power unit includes a separately packaged high-voltage input module 11 and a low-voltage output module 12. The high-voltage input module 11 is packaged with a first rectifier module 111, an inverter module 112, and a first DC support capacitor group 114. The first input end and the second input end of the first rectifier module 111 in the high-voltage input module 11 extend from the first shell 211. The first output end and the second output end of the inverter module 112 in the high-voltage input module 11 extend from the first shell 211, and are respectively electrically connected to the first input end and the second input end of the high-frequency transformer M1 in the low-voltage output module 12. The low-voltage output module 12 is packaged with a high-frequency transformer M1, a second rectifier module 121, and a second DC support capacitor group 123. The first output end and the second output end of the second rectifier module 121 in the low-voltage output module 12 extend from the second shell 311. The high voltage input module 11 and the low voltage output module 12 are packaged separately, realizing the modular design of the energy router power unit, reducing the difficulty of installation and maintenance of the energy router power unit, and also reducing the overall design difficulty of the energy router power unit.

[0106] An air-cooling heat dissipation structure is provided in the high-voltage input module 11 and the low-voltage output module 12 to dissipate heat from the high-voltage input module 11 and the low-voltage output module 12, so as to improve the safety and reliability of the power unit of the energy router.

[0107] In some examples, the low voltage output module 12 and the high voltage input module 11 may have the same shape and size, thereby further reducing the difficulty of installing and maintaining the energy router power unit, and further reducing the overall design difficulty of the energy router power unit.

[0108] The energy router may include multiple energy router power units in the above embodiment. The electrical connection between the multiple energy router power units can be seen in Figure 2 The energy router can be integrated in the energy router substation. The present application also provides an energy router substation. Fig.11 A schematic structural diagram of an embodiment of an energy router substation provided in the present application. Fig.12 for Fig.11 The schematic diagram of the structure of the energy router substation from another angle is shown in FIG. Fig.11 and Fig.12As shown, the energy router substation includes an outer shell 41. A series of components are arranged in the outer shell 41. A heat exchange fan (not shown in the figure) is arranged on the first surface of the outer shell 41. The number of heat exchange fans can be set according to the working scene and working requirements, and is not limited here. An air inlet 42 is arranged on the second surface of the outer shell 41. The number of air inlets 42 can be set according to the working scene and working requirements, and is not limited here. The first surface and the second surface of the outer shell 41 are two opposite surfaces. The wind for cooling enters from the air inlet 42 and leaves from the heat exchange fan. Fig.11 The dotted arrow in the figure is the direction from which the wind enters.

[0109] In some examples, the air inlet is installed with a louver 421. A fan mounting port 432 is provided on the first surface of the outer shell 41, and the heat exchange fan is installed at the fan mounting port 432. An air guide 431 may also be provided at the fan mounting port 432 outside the outer shell 41. Specifically, the air guide 431 corresponds to the heat exchange fan one by one. The wind for cooling enters from the louver 421 of the air inlet 42, passes through the components in the outer shell 41, flows out from the heat exchange fan, and leaves along the air duct formed by the air guide 431. Fig.11 The dotted arrow in the figure is the direction in which the wind is drawn out.

[0110] A three-phase reactor and a three-phase power unit group are arranged in the outer shell 41. The first surface of the outer shell 41 provided with a heat exchange fan is opposite to one side of the three-phase power unit group. Correspondingly, the second surface of the outer shell 41 provided with an air inlet is opposite to the other side of the three-phase power unit group.

[0111] In some examples, a plurality of bushings passing through the outer shell 41 may be provided on the outer shell 41. The three-phase high-voltage incoming lines may each enter the outer shell 41 through a bushing and be electrically connected to the corresponding single-phase reactor. The positive DC bus enters the outer shell 41 through a bushing and is electrically connected to the first output terminal 314 of the second rectifier module 121 in each low-voltage output module 12. The negative DC bus enters the outer shell 41 through a bushing and is electrically connected to the second output terminal 315 of the second rectifier module 121 in each low-voltage output module 12. Multiple bushings may be arranged at the same horizontal height or in a dispersed manner, which is not limited here. For example, Fig.11 and Fig.12As shown, bushings S1, S2, S3, S4 and S5 are provided on the outer shell 41. The first-phase high-voltage incoming line can enter the outer shell 41 through the bushing S1 and be electrically connected to the first-phase reactor L1, and the first-phase reactor L1 is connected to the first-phase power unit group 461. The second-phase high-voltage incoming line can enter the outer shell 41 through the bushing S2 and be electrically connected to the second-phase reactor L2, and the second-phase reactor L2 is connected to the second-phase power unit group 462. The third-phase high-voltage incoming line can enter the outer shell 41 through the bushing S3 and be electrically connected to the third-phase reactor L3, and the third-phase reactor L3 is connected to the third-phase power unit group 463. The positive DC busbar can enter the outer shell 41 through the bushing S4 and be electrically connected to the first output terminal 314 of the second rectifier module 121 in the first phase power unit group 461, the first output terminal 314 of the second rectifier module 121 in the second phase power unit group 462, and the first output terminal 314 of the second rectifier module 121 in the third phase power unit group 463. The negative DC busbar can enter the outer shell 41 through the bushing S5 and be electrically connected to the second output terminal 315 of the second rectifier module 121 in the first phase power unit group 461, the second output terminal 315 of the second rectifier module 121 in the second phase power unit group 462, and the second output terminal 315 of the second rectifier module 121 in the third phase power unit group 463.

[0112] Fig.13 for Fig.11 and Fig.12 The cross-sectional structure diagram of the energy router substation is shown in FIG. Fig.13 As shown, the energy router substation may also include a support structure 44 disposed in the outer shell 41, a three-phase reactor, a control cabinet 45, a three-phase power unit group disposed on the support structure 44, and the above-mentioned heat exchange fan. Fig.13 In the figure, the three-phase reactor, the three-phase power unit group and the control cabinet 45 are arranged in sequence. The three-phase power unit group includes a first-phase power unit group 461, a second-phase power unit group 462 and a third-phase power unit group 463. Each phase power unit group includes N energy router power units in the above-mentioned embodiment, where N is an integer greater than or equal to 2. The three-phase reactor includes a first-phase reactor L1, a second-phase reactor L2 and a third-phase reactor L3 (the third-phase reactor L3 is blocked and not shown in the figure).

[0113] Fig.14 The schematic diagram of the structure of an example of a three-phase power unit group provided in an embodiment of the present application is as follows: The power unit of the energy router is installed vertically on the supporting structure 44, the high voltage input module 11 is installed on the upper layer, and the low voltage output module 12 is installed on the lower layer.

[0114] The energy router power units in each phase power unit group can be arranged in two columns. For example, the energy router power units in the first phase power unit group 461 are arranged in two columns, the energy router power units in the second phase power unit group 462 are arranged in two columns, and the energy router power units in the third phase power unit group 463 are arranged in two columns. The first column of energy router power units in the first phase power unit group 461, the first column of energy router power units in the second phase power unit group 462, and the first column of energy router power units in the third phase power unit group 463 can be located in the same column. The second column of energy router power units in the first phase power unit group 461, the second column of energy router power units in the second phase power unit group 462, and the second column of energy router power units in the third phase power unit group 463 can be located in the same column. The three-phase power unit groups are arranged in sequence, and the energy router power units in each phase power unit group are arranged in two columns, which can improve the integration of the three-phase power unit groups.

[0115] Fig.15 for Fig.14 A partial structural schematic diagram of a three-phase power unit group is shown. Fig.15 The dotted arrow in the figure is the flow direction of the wind for cooling. Two energy routers in the same row can share the air duct. The wind for cooling enters 318 from the air inlet 218 of the high-voltage input module 11 and the air inlet 318 of the low-voltage output module 12 in the power unit of the first row of energy routers, passes through the air outlet of the high-voltage input module 11 and the air outlet of the low-voltage output module 12 in the power unit of the first row of energy routers, enters the air inlet 218 of the high-voltage input module 11 and the air inlet 318 of the low-voltage output module 12 in the power unit of the second row of energy routers, and the wind with heat is discharged from the air outlet of the high-voltage input module 11 and the air outlet of the low-voltage output module 12 in the power unit of the second row of energy routers.

[0116] Fig.16 A schematic diagram of an example of connecting the energy router power unit in the three-phase power unit group provided in the embodiment of the present application. Fig.16 As shown, in each phase power unit group, the first input end of the first rectifier module in the first high-voltage input module 11 is electrically connected to the corresponding one-phase reactor. The first input end of the first rectifier module in the i-th high-voltage input module 11 is electrically connected to the second input end of the first rectifier module in the i-1-th high-voltage input module 11 through the first connecting row 471, 1<i≤N. The first connecting row 471 may include a straight row, a U-shaped row, etc., which is not limited here.

[0117] The second input end of the first rectifier module in the Nth high-voltage input module 11 of each phase power unit group is electrically connected through the second connecting row 472. The second connecting row 472 is suspended and not grounded. The second connecting row 472 can be specifically a straight row, which is not limited here. The first output end of the second rectifier module in the low-voltage output module 12 of each phase power unit group is electrically connected through the third connecting row 473. The third connecting row 473 is electrically connected to the positive DC bus. The second output end of the second rectifier module in the low-voltage output module 12 of each phase power unit group is electrically connected through the fourth connecting row 474. The fourth connecting row 474 is electrically connected to the negative DC bus. The third connecting row 473 and the fourth connecting row 474 can be specifically U-shaped rows, which are not limited here.

[0118] The number of connection rows in the above embodiments can be set according to the working scenario and working requirements, and is not limited here.

[0119] Fig.17 A schematic structural diagram of an example of a support structure provided in an embodiment of the present application. Fig.17 The support structure 44 shown is applicable to the three-phase power unit group in the above-mentioned embodiment. Fig.17 As shown, the support structure 44 includes an upper support 443 and a lower support 442 , the high voltage input module 11 in the power unit of the energy router is arranged on the upper support 443 , and the low voltage output module 12 in the power unit of the energy router is arranged on the lower support 442 .

[0120] In the installed state, a lower support 442 is provided on the support base 441, and an upper support 443 is provided above the lower support 442. The lower support 442 can be specifically divided into three support areas. The lower support 442 in each support area is used to support the low-voltage output module 12 in the corresponding one-phase power unit group. The upper support 443 can be specifically divided into six support sub-areas, and the lower support 442 can also be specifically divided into six support sub-areas. The six support sub-areas of the upper layer correspond one-to-one to the six support sub-areas of the lower layer. The upper support 443 of a support sub-area of ​​the upper layer can be used to support a column of high-voltage input modules 11 in the corresponding one-phase power unit group. The lower support 442 of a support sub-area of ​​the lower layer can be used to support a column of low-voltage output modules 12 in the corresponding one-phase power unit group.

[0121] The upper support 443 may be an insulating support to achieve high voltage safety isolation. The lower support 442 may be an insulating support or a metal support, which is not limited here. In order to ensure safety isolation, the vertical supports in the upper support 443 and the lower support 442 may be insulating supports. The support base 441 may include but is not limited to a stainless steel base.

[0122] In the above embodiment, the first communication port in the high voltage input module 11 in each phase power unit group is connected to the control cabinet 45 through a first communication link, and the second communication port in the low voltage output module 12 in each phase power unit group is connected to the control cabinet 45 through a second communication link. For example, the first communication port includes the optical fiber transceiver 232, and the second communication port includes the optical fiber transceiver 342. Fig.18 This is a schematic diagram of an example of a fiber optic communication link between a fiber optic transceiver and a control cabinet provided in an embodiment of the present application. Fig.18 As shown, the optical fiber transceiver 232 of the high voltage input module 11 of each energy router power unit 10 in the first phase power unit group 461, the optical fiber transceiver 232 of the high voltage input module 11 of each energy router power unit 10 in the second phase power unit group 462, and the optical fiber transceiver 232 of the high voltage input module 11 of each energy router power unit 10 in the third phase power unit group 463 are connected to the control cabinet 45 through the first optical fiber communication link 511. The optical fiber transceiver 342 of the low voltage output module 12 of each energy router power unit 10 in the first phase power unit group 461, the optical fiber transceiver 342 of the low voltage output module 12 of each energy router power unit 10 in the second phase power unit group 462, and the optical fiber transceiver 342 of the low voltage output module 12 of each energy router power unit 10 in the third phase power unit group 463 are connected to the control cabinet 45 through the second optical fiber communication link 512. Information interaction with the control cabinet 45 is realized through the communication port.

[0123] In the embodiment of the present application, the three-phase reactor is integrated into the interior of the energy router substation through the integrated prefabricated design of the energy router substation, which reduces the design difficulty of the power cabinet, shortens the R&D and production time, and solves the problems of difficulty in connecting with the reactor and large area occupied by the substation.

[0124] In the use environment of microgrid, there is no need to build a special installation room, which can shorten the construction period of microgrid, reduce the cost of microgrid construction and improve economy.

[0125] It should be clear that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. For the energy router substation embodiment, the relevant parts can refer to the description part of the energy router power unit embodiment. The present application is not limited to the specific structure described above and shown in the figures. Those skilled in the art can make various changes, modifications and additions after understanding the spirit of the present application. In addition, for the sake of brevity, a detailed description of the known technology is omitted here.

[0126] Those skilled in the art should understand that the above embodiments are exemplary rather than restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on the study of the drawings, the specification and the claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other devices or steps; the quantifier "one" does not exclude multiple; the terms "first" and "second" are used to indicate names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. An energy router power unit, characterized in that: The energy router power unit comprises a separately packaged high voltage input module and a low voltage output module, wherein the energy router power unit is implemented as a separate structure; The high-voltage input module includes a first housing, and a first rectifier module, an inverter module and a first DC support capacitor group connected in parallel in the first housing; The first input end and the second input end of the first rectifier module extend from the first housing, and the first output end and the second output end of the inverter module extend from the first housing; The low-voltage output module includes a second housing, a high-frequency transformer located in the second housing, and a second rectifier module and a second DC support capacitor group connected in parallel and located in the second housing; The first input end and the second input end of the high-frequency transformer extend from the second housing, and are respectively electrically connected to the first output end and the second output end of the inverter module; the first output end and the second output end of the high-frequency transformer are respectively electrically connected to the first input end and the second input end of the second rectifier module; the first output end and the second output end of the second rectifier module extend from the second housing; The connection between the high voltage input module and the low voltage output module is a detachable connection.

2. The energy router power unit according to claim 1, characterized in that: The high-voltage input module further includes a first air-cooling heat dissipation structure located in the first housing, and the first rectifier module and the inverter module are arranged on the back of the first air-cooling heat dissipation structure; The first air-cooling heat dissipation structure includes a first heat dissipation base and a plurality of first heat dissipation fins arranged on the first heat dissipation base; an air inlet is arranged on a first surface of the first housing opposite to the first heat dissipation fins, and an air outlet is arranged on a second surface of the first housing opposite to the first surface; The high-voltage input module further includes a first laminated busbar located in the first housing, the first laminated busbar is arranged in parallel with the first heat dissipation base, the first laminated busbar is connected to the first DC support capacitor group, and the laminated busbar is electrically connected to the first rectifier module and the inverter module respectively; The low-voltage output module further includes a second air-cooling heat dissipation structure located in the second housing, and the second rectifier module is arranged on the back of the second air-cooling heat dissipation structure; The second air-cooling heat dissipation structure includes a second heat dissipation base and a plurality of second heat dissipation fins arranged on the second heat dissipation base; an air inlet is arranged on a first surface of the second housing opposite to the second heat dissipation fins, and an air outlet is arranged on a second surface of the second housing opposite to the first surface; The low-voltage output module also includes a second laminated busbar located in the second shell, the second laminated busbar is arranged in parallel with the second heat dissipation base, the second laminated busbar is connected to the second DC support capacitor group, and the second laminated busbar is electrically connected to the second rectifier module.

3. The energy router power unit according to claim 2, characterized in that: The first rectifier module includes two half-bridge IGBT device groups, and the inverter module includes two half-bridge IGBT device groups; the high-voltage input module also includes a first drive control circuit board group arranged on the first rectifier module and the inverter module on the side facing away from the first heat dissipation base; Along the direction of the first rectifier module and the inverter module facing away from the first heat dissipation base, the first drive control circuit board group includes a first drive circuit board, a second drive circuit board and a first control circuit board which are stacked; The first driving circuit board comprises a first circuit corresponding to each of the half-bridge IGBT device groups, and each of the first circuits is electrically connected to two first terminals on the first driving circuit board; the second driving circuit board comprises an isolation driver corresponding to each of the half-bridge IGBT device groups, and each of the isolation drivers is electrically connected to two second terminals and one third terminal on the second driving circuit board, and is electrically connected to the first terminal and the second terminal corresponding to the same half-bridge IGBT device group; the first control circuit board comprises a first control circuit, four fourth terminals electrically connected to the first control circuit, and a first communication port connected to the first control circuit, and the fourth terminals are electrically connected to the third terminals in a one-to-one correspondence, and the first housing is provided with an opening corresponding to the first communication port; The high-voltage input module also includes a first power supply, which is disposed adjacent to the first drive control circuit board group and is electrically connected to the first laminated busbar and the first control circuit board, respectively.

4. The energy router power unit according to claim 2, characterized in that: The second rectifier module includes two half-bridge IGBT device groups; the low-voltage output module also includes a second drive control circuit board group arranged on the side of the second rectifier module facing away from the second heat dissipation base; Along the direction of the second rectifier module facing away from the second heat dissipation base, the second drive control circuit board group includes a third drive circuit board, a fourth drive circuit board and a second control circuit board which are stacked; The third driving circuit board includes a second circuit corresponding to each of the half-bridge IGBT device groups, and each of the second circuits is electrically connected to two fifth terminals on the third driving circuit board; the fourth driving circuit board includes an isolation driver corresponding to each of the half-bridge IGBT device groups, and each of the isolation drivers is electrically connected to two sixth terminals and one seventh terminal on the fourth driving circuit board, and is electrically connected to the fifth terminal and the sixth terminal corresponding to the same half-bridge IGBT device group; the second control circuit board includes a second control circuit, two eighth terminals electrically connected to the second control circuit, and a second communication port connected to the second control circuit, and the eighth terminal is electrically connected to the seventh terminal in a one-to-one correspondence, and the second housing is provided with an opening corresponding to the second communication port; The low-voltage output module also includes a second power supply, which is arranged adjacent to the second drive control circuit board group, and is electrically connected to the second laminated busbar and the second control circuit board respectively.

5. The energy router power unit according to claim 1, characterized in that: The first input end and the second input end of the high-frequency transformer extending out of the second housing are covered with isolation sheds.

6. An energy router substation, characterized in that: It comprises an outer shell, a supporting structure arranged in the outer shell, a three-phase reactor, a control cabinet, a three-phase power unit group arranged on the supporting structure, and a heat exchange fan; the heat exchange fan is arranged on a first surface of the outer shell opposite to the three-phase power unit group, and an air inlet is arranged on a second surface of the outer shell opposite to the first surface; Each phase power unit group includes N energy router power units as described in any one of claims 1 to 5, where N is an integer greater than or equal to 2.

7. The energy router substation according to claim 6, characterized in that: The first phase power unit group, the second phase power unit group, the third phase power unit group, and the three-phase reactor are arranged in sequence; the energy router power units in each phase power unit group are arranged in two columns; In each phase power unit group, the first input end of the first rectifier module in the first high-voltage input module is electrically connected to the corresponding one-phase reactor, and the first input end of the first rectifier module in the i-th high-voltage input module is electrically connected to the second input end of the first rectifier module in the i-1-th high-voltage input module through a first connecting bar, 1<i≤N; The second input end of the first rectifier module in the Nth high-voltage input module of each phase power unit group is electrically connected through a second connecting bar, the first output end of the second rectifier module in the low-voltage output module of each phase power unit group is electrically connected through a third connecting bar, and the third connecting bar is electrically connected to the positive DC bus, and the second output end of the second rectifier module in the low-voltage output module of each phase power unit group is electrically connected through a fourth connecting bar, and the fourth connecting bar is electrically connected to the negative DC bus.

8. The energy router substation according to claim 6, characterized in that: A fan mounting opening is arranged on a first surface of the outer shell opposite to the three-phase power unit group, the heat exchange fan is mounted on the fan mounting opening, and an air guide cover is also arranged on the outside of the outer shell at the fan mounting opening; The air inlet is equipped with a shutter.

9. The energy router substation according to any one of claims 6 to 8, characterized in that: The supporting structure comprises an upper support and a lower support, the high voltage input module in the power unit of the energy router is arranged on the upper support, and the low voltage output module in the power unit of the energy router is arranged on the lower support; The upper support is an insulating support; The support structure also includes a support base, and the support base is located below the lower support.

10. The energy router substation according to any one of claims 6 to 8, characterized in that: The outer shell is provided with a plurality of bushings passing through the outer shell, each of the three-phase high-voltage incoming lines enters the outer shell through one of the bushings and is electrically connected to the corresponding one-phase reactor, the positive DC bus enters the outer shell through one of the bushings and is electrically connected to the first output end of the second rectifier module in each of the low-voltage output modules, and the negative DC bus enters the outer shell through one of the bushings and is electrically connected to the second output end of the second rectifier module in each of the low-voltage output modules; The first communication port in the high voltage input module in each phase power unit group is connected to the control cabinet via a first communication link, and the second communication port in the low voltage output module in each phase power unit group is connected to the control cabinet via a second communication link.

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