Energy router power unit and substation

Abstract

The present application discloses an energy router power unit and a substation, which belongs 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, a first water-cooled heat dissipation structure, a first DC support capacitor group, a first rectifier module and an inverter module located 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, a second water-cooled heat dissipation structure, a second DC support capacitor group and a second rectifier module located in the second shell; 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 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 shell, a first water-cooled heat dissipation structure and a first DC support capacitor group located in the first shell, and a first rectifier module and an inverter module connected in parallel on the back of the first water-cooled heat dissipation structure; the first DC support capacitor group is connected in parallel with the first rectifier module; 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;

[0007] The low-voltage output module includes a second shell, a high-frequency transformer, a second water-cooling heat dissipation structure, a second DC support capacitor group, and a second rectifier module arranged on the back of the second water-cooling heat dissipation structure; the second DC support capacitor group is connected in parallel with the second rectifier module; 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, 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 first water-cooled heat dissipation structure includes a first water-cooled plate, the first water-cooled plate has a water inlet and a water outlet, the water inlet and the water outlet of the first water-cooled plate extend out of the first shell, the first rectifier module and the inverter module are arranged on one side of the water-cooled plate, and the first DC support capacitor group is located on the other side of the first water-cooled plate.

[0009] 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 connected to the first DC support capacitor group, the first stacked busbar is connected to the first rectifier module and the inverter module, and the first stacked busbar is perpendicular to the plane formed by the first rectifier module and the inverter module.

[0010] In some possible embodiments, the second water-cooled heat dissipation structure includes a second water-cooled plate, the second water-cooled plate has a water inlet and a water outlet, the water inlet and the water outlet of the second water-cooled plate extend out of the second shell, the second rectifier module is arranged on one side of the second water-cooled plate, and the second DC support capacitor group is located on the other side of the second water-cooled plate; the water outlet of the second water-cooled plate is connected to the water inlet of the first water-cooled plate through a first connecting water pipe.

[0011] 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 connected to the second DC support capacitor group, the second laminated busbar is connected to the second rectifier module, and the second laminated busbar is perpendicular to the plane where the second rectifier module is located.

[0012] In some possible embodiments, the first rectifier submodule includes two half-bridge IGBT device groups, and the inverter submodule includes two half-bridge IGBT device groups.

[0013] In some possible embodiments, the high-voltage input module further includes a first drive control circuit board group and a first power supply arranged on a side of the first rectifier module and the inverter module facing away from the first water cooling plate.

[0014] In some possible embodiments, along the direction of the first rectifier module and the inverter module facing away from the first water-cooling plate, the first drive control circuit board group includes a first drive circuit board, a second drive circuit board and a first control circuit board that are stacked;

[0015] The first driving circuit board includes first circuits corresponding to the half-bridge IGBT device groups, and each first circuit is electrically connected to two first terminals on the first driving circuit board; the second driving circuit board includes isolation drivers corresponding to the half-bridge IGBT device groups, and each isolation driver is electrically connected to two second terminals and one third terminal on the second driving 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.

[0016] In some possible embodiments, the first power supply is disposed adjacent to the first drive control circuit board group, and the first power supply is electrically connected to the first laminate busbar and the first control circuit board respectively.

[0017] In some possible embodiments, the second rectifier module includes two half-bridge IGBT device groups.

[0018] In some possible embodiments, the low-voltage output module further includes a second drive control circuit board group disposed on a side of the second rectifier module facing away from the second water-cooling plate, and a second power supply.

[0019] In some possible embodiments, along the direction of the second rectifier module facing away from the second water-cooling plate, 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] The third driver circuit board includes second circuits corresponding to the respective half-bridge IGBT device groups, 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 the respective half-bridge IGBT device groups, and each isolation driver is electrically connected to two sixth terminals and one seventh terminal on the fourth driver 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, the eighth terminal is electrically connected to the seventh terminal in a one-to-one correspondence, and an opening corresponding to the second communication port is provided on the second shell.

[0021] In some possible embodiments, the second power supply is disposed adjacent to the second drive control circuit board group, and the second power supply 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 inside the outer shell, a three-phase reactor, a water cooling cabinet, a control cabinet, a three-phase power unit group arranged on the supporting structure, and a heat exchanger arranged outside the outer shell and connected to the water cooling cabinet through a heat exchange water inlet pipe and a heat exchange water outlet pipe;

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

[0025] In some possible embodiments, the three-phase reactor, the first-phase power unit group, the second-phase power unit group, and the third-phase power unit group are arranged in sequence; and the power units of the energy router 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, the energy router substation further comprises a first main water outlet pipe disposed above a row of high-voltage input modules, a second main water outlet pipe disposed above another row of high-voltage input modules, a first main water outlet pipe disposed below a row of low-voltage output modules, and a second main water outlet pipe disposed below another row of low-voltage output modules.

[0029] In some possible embodiments, the first main water outlet pipe, the first main water inlet pipe, the second main water outlet pipe and the second main water inlet pipe are connected to the water cooling cabinet, the first main water outlet pipe is provided with a first branch water outlet corresponding one-to-one to a row of high-pressure input modules, the water outlet of the first water-cooled plate in a row of high-pressure input modules is connected to the corresponding first branch water outlet through a second connecting water pipe, the first main water inlet pipe is provided with a first branch water inlet corresponding one-to-one to a row of low-pressure output modules, the water inlet of the second water-cooled plate in a row of low-pressure output modules is connected to the corresponding first branch water inlet through a third connecting water pipe, the second main water outlet pipe is provided with a second branch water outlet corresponding one-to-one to another row of high-pressure input modules, the water outlet of the first water-cooled plate in another row of high-pressure input modules is connected to the corresponding second branch water outlet through a fourth connecting water pipe, the second main water inlet pipe is provided with a second branch water inlet corresponding one-to-one to another row of low-pressure output modules, and the water inlet of the second water-cooled plate in another row of low-pressure output modules is connected to the corresponding second branch water inlet through a fifth connecting water pipe.

[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 water-cooled heat dissipation structure, a first DC support capacitor group, a first rectifier module, and an inverter module. 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 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 water-cooled heat dissipation structure, 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 11 and the low-voltage output module are separately packaged, realizing the modular design of the energy router power unit and reducing 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 3 A schematic diagram of the structure of an embodiment of the energy router power unit provided by the present application;

[0040] Figure 4 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;

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

[0042] Figure 6 for Figure 5 A schematic structural diagram of at least a portion of the internal structure of the high-voltage input module shown in another angle;

[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 A schematic diagram of an example of a first drive control circuit board group and a half-bridge IGBT device group after being separated according to an embodiment of the present application;

[0045] Fig. 9 A schematic diagram of the structure of an example of a low-voltage output module provided in an embodiment of the present application;

[0046] Fig.10 for Fig. 9 A structural schematic diagram of the low voltage output module from another angle shown;

[0047] Fig.11 A structural block diagram of an example of a second drive control circuit board group provided in an embodiment of the present application;

[0048] Fig.12 A schematic diagram of an example of a second drive control circuit board group and a half-bridge IGBT device group after being separated according to an embodiment of the present application;

[0049] Fig.13 A schematic diagram of the structure of an embodiment of an energy router substation provided by the present application;

[0050] Fig.14 for Fig.13 A schematic cross-sectional structure diagram of an energy router substation is shown;

[0051] Fig.15 A schematic diagram of an example of a three-phase power unit group and a water cooling part provided in an embodiment of the present application;

[0052] Fig.16 A partial schematic diagram of an example of a partial water cooling part and an energy router power unit provided in an embodiment of the present application;

[0053] Fig.17 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;

[0054] Fig.18 A schematic structural diagram of an example of a support structure provided in an embodiment of the present application;

[0055] Fig.19 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

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] The second rectifier module 121 includes two half-bridge IGBT device groups 123. Each half-bridge IGBT device group 123 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 1The 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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 3As 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.

[0071] Figure 4 This is a schematic diagram of an example of at least a partial structure of the internal structure of the high voltage input module provided in an embodiment of the present application. Figure 3 and Figure 4 As shown, the high-voltage input module includes a first shell 211, a first water-cooled heat dissipation structure and a first DC support capacitor group 114 located in the first shell 211, and a first rectifier module 111 and an inverter module 112 connected in parallel on the back of the first water-cooled heat dissipation structure.

[0072] The first DC support capacitor group 114 is connected in parallel with the first rectifier module 111. The first input terminal 212 and the second input terminal 213 of the first rectifier module 111 extend from the first housing 211. The first input terminal 212 of the first rectifier module 111 can be used as the first input terminal of the high-voltage input module 11, and the second input terminal 213 of the first rectifier module 111 can be used as the second input terminal of the high-voltage input module 11. The first output terminal 214 and the second output terminal 215 of the inverter module 112 extend from the first housing 211. The first output terminal 214 of the inverter module 112 can be used as the first output terminal of the high-voltage input module 11, and the second output terminal 215 of the inverter module 112 can be used as the second output terminal of the high-voltage input module 11. The first output terminal of the first rectifier module 111 is connected to the first input terminal of the inverter module 112, and the second output terminal of the first rectifier module 111 is connected to the second input terminal of the inverter module 112.

[0073] In some examples, such as Figure 4As shown, the first water-cooled heat dissipation structure includes a first water-cooled plate 216. The first water-cooled plate 216 has a water inlet 217 and a water outlet 218. The water inlet 217 and the water outlet 218 of the first water-cooled plate 216 extend out of the first housing 211. The coolant can flow into the first water-cooled plate 216 through the water inlet 217 and flow out of the first water-cooled plate 216 through the water outlet 218. The first rectifier module 111 and the inverter module 112 are arranged on one side of the first water-cooled plate 216, and the first DC support capacitor group 114 is located on the other side of the first water-cooled plate 216. That is, the first water-cooled plate 216 can be arranged between the first DC support capacitor group 114 and the first rectifier module 111 and the inverter module 112. Specifically, the first rectifier module 111 and the inverter module 112 can be arranged on one side of the first water-cooled plate 216. The heat generated by the first rectifier module 111 and the inverter module 112 can be dissipated to the first water cooling plate 216 and taken away by the coolant flowing through the first water cooling plate 216. When the power unit of the energy router is in a vertical installation state, the first water cooling plate 216 is placed vertically, the water inlet 217 is located at the lower end of the first water cooling plate 216, and the water outlet 218 is located at the upper end of the first water cooling plate 216.

[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 connected to the first DC support capacitor group 114. The first laminated busbar 219 is 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. For compact design, the first laminated busbar 219 is perpendicular to the plane formed by the first rectifier module 111 and the inverter module 112. That is, the first laminated busbar 219 can be vertically connected and installed with the first rectifier module 111 and the inverter module 112 including the half-bridge IGBT device group 113.

[0075] Figure 5 A schematic structural diagram of another example of at least a portion of the internal structure of the high-voltage input module provided in an embodiment of the present application. Figure 6 for Figure 5 The schematic diagram of the structure of at least part of the internal structure of the high-voltage input module is shown in FIG. Figure 5 and Figure 6 As shown, the high-voltage input module 11 further includes a first drive control circuit board group disposed on the side of the first rectifier module 111 and the inverter module 112 facing away from the first water-cooling plate 216. Specifically, along the direction of the first rectifier module 111 and the inverter module 112 facing away from the first water-cooling plate 216, the first drive control circuit board group includes a first drive circuit board 221, a second drive circuit board 222, and a first control circuit board 223 that are stacked.

[0076] 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.

[0077] 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.

[0078] In order to facilitate the explanation of the structure and connection relationship of the first drive circuit board 221, the second drive circuit board 222 and the first control circuit board 223, the explanation is given through the structural block diagram of the first drive circuit board 221, the second drive circuit board 222 and the first control circuit board 223 and their relative positions to the half-bridge IGBT device group 113. Figure 7 This 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. Figure 8 A schematic diagram of an example of a first drive control circuit board group and a half-bridge IGBT device group after being separated provided in an embodiment of the present application.

[0079] like Figure 7 and Figure 8 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.

[0080] The first driving circuit board 221 includes first circuits 224 corresponding to the half-bridge IGBT device groups 113. 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 part 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 part 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 .

[0081] The second driving circuit board 222 includes an isolation driver 227 corresponding to each half-bridge IGBT device group 113. 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.

[0082] 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 113 in the first rectifier module 111 and each half-bridge IGBT device group 113 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 7 and Figure 8 As shown, the first communication port may include a fiber optic transceiver 232 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 227, 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.

[0083] 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 113. 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.

[0084] 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.

[0085] In some examples, such as Figure 5 and Figure 6As 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 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 control circuit board 223 is short, and the reliability is high.

[0086] Fig. 9 A schematic diagram of the structure of an example of a low-voltage output module provided in an embodiment of the present application. Fig.10 for Fig. 9 The schematic diagram of the structure of the low voltage output module from another angle is shown in FIG. Figure 3 , Fig. 9 and Fig.10 As shown, the low voltage output module 12 includes a second housing 311, a high frequency transformer M1, a second water cooling structure, a second DC support capacitor group 122, and a second rectifier module 121 disposed on the back of the second water cooling structure. The second DC support capacitor group 122 is connected in parallel with the second rectifier module 121.

[0087] 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.

[0088] In some examples, such as Figure 3 , Fig. 9 and Fig.10 As 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.

[0089] In some examples, the second water-cooled heat dissipation structure includes a second water-cooled plate 316. The second water-cooled plate 316 has a water inlet 317 and a water outlet 318. The water inlet 317 and the water outlet 318 of the second water-cooled plate 316 extend out of the second housing 311. The coolant can flow into the second water-cooled plate 316 through the water inlet 317 and flow out of the second water-cooled plate 316 through the water outlet 318. The second rectifier module 121 is arranged on one side of the second water-cooled plate 316, and the second DC support capacitor group 122 is located on the other side of the second water-cooled plate 316. That is, the second water-cooled plate 316 can be arranged between the second DC support capacitor group 122 and the second rectifier module 121. Specifically, the second rectifier module 121 can be arranged on one side of the second water-cooled plate 316. The heat generated by the second rectifier module 121 can be dissipated to the second water-cooled plate 316 and taken away by the coolant flowing through the second water-cooled plate 316. When the power unit of the energy router is in a vertical installation state, the second water-cooling plate 316 is placed vertically, the water inlet 317 is located at the lower end of the second water-cooling plate 316, and the water outlet 318 is located at the upper end of the second water-cooling plate 316. The water outlet 318 of the second water-cooling plate 316 is connected to the water inlet 217 of the first water-cooling plate 216 through the first connecting water pipe, so that the coolant passes through the water inlet 317 of the second water-cooling plate 316, the second water-cooling plate 316, the water outlet 318 of the second water-cooling plate 316, the first connecting water pipe, the water inlet 217 of the first water-cooling plate 216, the first water-cooling plate 216, and the water outlet 218 of the first water-cooling plate 216 in sequence, so as to achieve heat dissipation of the low-voltage output module 12 and the high-voltage input module 11.

[0090] 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 connected to the second DC support capacitor group 122. The second laminated busbar 319 is connected to the second rectifier module 121. The second laminated busbar 319 realizes the parallel connection of the second rectifier module 111 and the second DC support capacitor group 122. For compact design, the second laminated busbar 319 is perpendicular to the plane where the second rectifier module 121 is located. That is, the second laminated busbar 319 can be vertically connected and installed with the second rectifier module 121 including the half-bridge IGBT device group 123.

[0091] like Fig. 9 and Fig.10As shown, the low-voltage output module 11 also includes a second drive control circuit board group arranged on the side of the second rectifier module 121 facing away from the second water-cooling plate 316. Specifically, along the direction of the second rectifier module 121 facing away from the second water-cooling plate 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.

[0092] The third driving circuit board 331 is electrically connected to the half-bridge IGBT device group 123 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.

[0093] In some examples, the third driving circuit board 331 can be welded to the auxiliary connection terminal of the half-bridge IGBT device group 123 in the second rectifier module 121 through the pads on the third driving circuit board 331 .

[0094] In order to facilitate the explanation of the structure and connection relationship of the third drive circuit board 331, the fourth drive circuit board 332 and the second control circuit board 333, the explanation is given through the structural block diagram of the third drive circuit board 331, the fourth drive circuit board 332 and the second control circuit board 333 and the relative position to the half-bridge IGBT device group. Fig.11 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. Fig.12 A schematic diagram of an example of a second drive control circuit board group and a half-bridge IGBT device group after being separated provided in an embodiment of the present application.

[0095] like Fig. 9 , Fig.10 and Fig.12 As shown, 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 includes a second circuit 334 corresponding to each half-bridge IGBT device group 123. 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 123 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 123, 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 123. 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 123 in the second rectifier module 121 in an integrated manner.

[0097] The fourth driving circuit board 332 includes an isolation driver 337 corresponding to each half-bridge IGBT device group 123. 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 123 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 123 are electrically connected. One of the two sixth wiring terminals 336 corresponding to a half-bridge IGBT device group 123 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 123, 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.

[0098] 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 123 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 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 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.

[0099] The circuits on the third driving circuit board 331 include driving circuits, protection circuits, detection circuits, etc. with strong anti-interference capabilities. The circuits on the fourth driving circuit board 332 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 third driving circuit board 331 and the fourth driving 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 123. Moreover, the distances between the third driving circuit board 331, the fourth driving 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.

[0100] In the above embodiment, the second rectifier module 121, the second DC support capacitor group 122 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.

[0101] In some examples, such as Fig. 9 and Fig.10As 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.

[0102] In the embodiment of the present application, the power unit of the energy router 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 water-cooled heat dissipation structure, a first DC support capacitor group 114, a first rectifier module 111 and an inverter module 112. 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 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 water-cooled heat dissipation structure, a second rectifier module 121 and a second DC support capacitor group 122. 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 each 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. A water cooling structure is provided in the high voltage input module 11 and the low voltage output module 12, which can dissipate the heat of the high voltage input module 11 and the low voltage output module 12, so as to improve the safety and reliability of the energy router power unit.

[0103] 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.

[0104] 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 2The energy router can be integrated in the energy router substation. The present application also provides an energy router substation. Fig.13 A schematic structural diagram of an embodiment of an energy router substation provided in the present application. Fig.14 for Fig.13 The cross-sectional structural diagram of the energy router substation is shown.

[0105] like Fig.13 and Fig.14 As shown, the energy router substation may include an outer shell 41, a support structure 42, a three-phase reactor, a water cooling cabinet 43, a control cabinet 44, a three-phase power unit group arranged on the support structure 42, and a heat exchanger 46 arranged on the outside of the outer shell 41 and connected to the water cooling cabinet 43 through a heat exchange water inlet pipe 461 and a heat exchange water outlet pipe 462. The three-phase reactor includes a first-phase reactor L1, a second-phase reactor L2, and a third-phase reactor L3 (the second-phase reactor L2 and the third-phase reactor L3 are blocked and not shown in the figure). The three-phase power unit group includes a first-phase power unit group 451, a second-phase power unit group 452, and a third-phase power unit group 453. The three-phase reactor, the first-phase power unit group 451, the second-phase power unit group 452, and the third-phase power unit group 453 are arranged in sequence. Each phase power unit group includes N energy router power units in the above-mentioned embodiment, and N is an integer greater than or equal to 2.

[0106] A heat exchanger 46 is arranged outside the outer shell 41 of the energy router substation. Specifically, the heat exchanger 46 can be arranged at the top of the outer shell 41, close to the water cooling cabinet 43. The heat exchanger 46 can cool the coolant with heat generated by the three-phase power unit group entering the heat exchanger 46 through the heat exchange water inlet pipe 461, and then the cooled coolant flows out through the heat exchange water outlet pipe 462 to flow into the water cooling cabinet 43, so that the water cooling cabinet 43 can use the cooled coolant to dissipate heat from the three-phase power unit group. The heat exchanger 46 can specifically include a heat exchange fan, which is not limited here. The control cabinet 44, the water cooling cabinet 43, and the three-phase power unit group arranged on the supporting structure 42 are arranged in sequence.

[0107] 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 one-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. The bushing may be provided on a side adjacent to the heat exchanger 46 or on a side away from the heat exchanger 46, which is not limited here. Multiple bushings may be provided at the same level or may be provided in a dispersed manner, which is not limited here.

[0108] For example, Fig.13 As shown, the outer shell 41 is provided with bushings S1, S2, S3, S4 and S5, and the bushings S1 to S5 can be arranged on a side away from the heat exchanger 46. Among them, 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 451. 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 452. 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 453. 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 451, the first output terminal 314 of the second rectifier module 121 in the second phase power unit group 452, and the first output terminal 314 of the second rectifier module 121 in the third phase power unit group 453. 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 451, the second output terminal 315 of the second rectifier module 121 in the second phase power unit group 452, and the second output terminal 315 of the second rectifier module 121 in the third phase power unit group 453.

[0109] Fig.15 This is a schematic diagram of an example of the structure of a three-phase power unit group and a water cooling part provided in an embodiment of the present application. Fig.15 As shown, the three-phase power unit group is arranged on the supporting structure 42. In this example, the three-phase reactor may not be arranged on the supporting structure 42.

[0110] Specifically, the energy router power units in each phase power unit group are arranged in two columns. For example, the energy router power units in the first phase power unit group 451 are arranged in two columns, the energy router power units in the second phase power unit group 452 are arranged in two columns, and the energy router power units in the third phase power unit group 453 are arranged in two columns. The first column of energy router power units in the first phase power unit group 451, the first column of energy router power units in the second phase power unit group 452, and the first column of energy router power units in the third phase power unit group 453 can be located in the same column. The second column of energy router power units in the first phase power unit group 451, the second column of energy router power units in the second phase power unit group 452, and the second column of energy router power units in the third phase power unit group 453 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 group.

[0111] In some examples, the energy router substation further has a first main water outlet pipe 471, a second main water outlet pipe 472, a first main water inlet pipe 473 and a first main water inlet pipe 474. The first main water outlet pipe 471, the second main water outlet pipe 472, the first main water inlet pipe 473 and the second main water inlet pipe 474 are arranged adjacent to the three-phase power unit group to dissipate heat for the three-phase power unit group. The first main water outlet pipe 471, the second main water outlet pipe 472, the first main water inlet pipe 473 and the second main water inlet pipe 474 are connected to the water cooling cabinet 43. Fig.14 As shown, the first main water outlet pipe 471 is located above a row of high-pressure input modules 11. The first main water outlet pipe 471 is provided with a first branch water outlet corresponding to a row of high-pressure input modules 11. The second main water outlet pipe 472 is located above another row of high-pressure input modules 11. The second main water outlet pipe 472 is provided with a second branch water outlet corresponding to another row of high-pressure input modules 11. The first main water inlet pipe 473 is located below a row of low-pressure output modules 12. The first main water inlet pipe 473 is provided with a first branch water inlet corresponding to a row of low-pressure output modules 12. The second main water inlet pipe 474 is located below another row of low-pressure output modules 12. The second main water inlet pipe 474 is provided with a second branch water inlet corresponding to another row of low-pressure output modules 12.

[0112] Fig.16 A partial schematic diagram of an example of a partial water cooling portion and an energy router power unit provided in an embodiment of the present application. Fig.16 FIG. 1 shows a part of a row of high voltage input modules 11 and a row of low voltage output modules 12. Fig.16As shown, the power unit of the energy router is installed vertically on the support structure 42, 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 water outlet 218 of the first water cooling plate 216 in a row of high-voltage input modules 11 is connected to the corresponding first branch water outlet through the second connecting water pipe 481. The water inlet 317 of the second water cooling plate 316 in a row of low-voltage output modules 12 is connected to the corresponding first branch water inlet through the third connecting water pipe 482. Fig.16 On the other side not shown, the water outlet 218 of the first water cooling plate 216 in another row of high-pressure input modules 11 is connected to the corresponding second branch water outlet through the fourth connecting water pipe. The water inlet 317 of the second water cooling plate 316 in another row of low-pressure output modules 12 is connected to the corresponding second branch water inlet through the fifth connecting water pipe. In the same energy router power unit, the water inlet 217 of the first water cooling plate 216 of the high-pressure input module 11 is connected to the water outlet 318 of the second water cooling plate 316 of the low-pressure output module 12 through the first connecting water pipe 15.

[0113] The water cooling cabinet 43 transmits the coolant to a row of low-pressure output modules 12 through the first main water inlet pipe and the third connecting water pipe 482. The coolant takes away the heat generated by the row of low-pressure output modules 12 and enters a row of high-pressure input modules 11 through the first connecting water pipe 15. The coolant takes away the heat generated by the row of high-pressure input modules 11. The coolant with heat flows into the water cooling cabinet 43 through the second connecting water pipe 481 and the first main water outlet pipe 473. The water cooling cabinet 43 includes a circulation system, which can transmit the coolant with heat to the heat exchanger 46 through the heat exchange inlet pipe 461. The heat exchanger 46 cools the coolant with heat and transmits the cooled coolant to the water cooling cabinet 43 through the heat exchange outlet pipe 462. The water cooling cabinet 43 then transmits the cooled coolant to the row of low-pressure output modules 12 through the first main water inlet pipe and the third connecting water pipe 482 for the next cooling cycle.

[0114] The water cooling cabinet 43 also transmits the coolant to another row of low-pressure output modules 12 through the second main water inlet pipe and the fifth connecting water pipe. The coolant takes away the heat generated by the other row of low-pressure output modules 12 and enters another row of high-pressure input modules 11 through the first connecting water pipe 15. The coolant takes away the heat generated by the other row of high-pressure input modules 11. The coolant with heat flows into the water cooling cabinet 43 through the fourth connecting water pipe and the second main water outlet pipe 474. The water cooling cabinet 43 includes a circulation system, which can transmit the coolant with heat to the heat exchanger 46 through the heat exchange water inlet pipe 461. The heat exchanger 46 cools the coolant with heat and transmits the cooled coolant to the water cooling cabinet 43 through the heat exchange water outlet pipe 462. The water cooling cabinet 43 then transmits the cooled coolant to another row of low-pressure output modules 12 through the second main water inlet pipe and the fifth connecting water pipe for the next cooling cycle.

[0115] Fig.17 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.17 As shown, in each phase power unit group, the first input terminal 212 of the first rectifier module 111 in the first high-voltage input module 11 is electrically connected to the corresponding one-phase reactor. The first input terminal 212 of the first rectifier module 111 in the i-th high-voltage input module 11 is electrically connected to the second input terminal 213 of the rectifier module 111 in the i-1-th high-voltage input module 11 through the first connecting bar 491, 1<i≤N. The first connecting bar 491 may include a straight-line connecting bar, a U-shaped connecting bar, etc., which are not limited here.

[0116] The second input end 213 of the first rectifier module 111 in the Nth high-voltage input module 11 of each phase power unit group is electrically connected through a second connecting bar (not shown in the figure). The first output end 312 of the second rectifier module 121 in the low-voltage output module 12 of each phase power unit group is electrically connected through a third connecting bar. The third connecting bar 493 is electrically connected to the positive DC bus. The third connecting bar 493 can be a U-shaped connecting bar, which is not limited here. The second output end of the second rectifier module 121 in each low-voltage output module 12 of each phase power unit group is electrically connected through a fourth connecting bar 494. The fourth connecting bar 494 is electrically connected to the negative DC bus.

[0117] 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.

[0118] Fig.18 A schematic structural diagram of an example of a support structure provided in an embodiment of the present application. Fig.18 The support structure 42 shown is applicable to the three-phase power unit group in the above-mentioned embodiment. Fig.18 As shown, the support structure 42 includes an upper support 423 and a lower support 422. The high voltage input module 11 in the power unit of the energy router is arranged on the upper support 423, and the low voltage output module 12 in the power unit of the energy router is arranged on the lower support 422. In some examples, the support structure further includes a support base 421.

[0119] In the installed state, a lower support 422 is provided on the support base 421, and an upper support 423 is provided above the lower support 422. The lower support 422 and the upper support 423 can be specifically divided into three support areas. The lower support 422 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 423 in each support area is used to support the high-voltage input module 11 in the corresponding one-phase power unit group. The upper support 423 can be specifically further divided into six support sub-areas, and the lower support 422 can be specifically further 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 423 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 422 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.

[0120] The upper support 423 may be an insulating support to achieve high voltage safety isolation. The lower support 422 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 423 and the lower support 422 may be insulating supports. The support base 421 may include but is not limited to a stainless steel base.

[0121] In the above embodiment, the communication port in the high voltage input module 11 in each phase power unit group is connected to the control cabinet 44 through a first communication link, and the communication port in the low voltage output module 12 in each phase power unit group is connected to the control cabinet 44 through a second communication link. For example, the first communication port includes a fiber optic transceiver, and the second communication port includes a fiber optic transceiver. Fig.19 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.19 As shown, the optical fiber transceiver of the high voltage input module 11 of each energy router power unit 10 in the first phase power unit group 451, the optical fiber transceiver of the high voltage input module 11 of each energy router power unit 10 in the second phase power unit group 453, and the optical fiber transceiver of the high voltage input module 11 of each energy router power unit 10 in the third phase power unit group 453 are connected to the control cabinet 44 through the first optical fiber communication link 511. The optical fiber transceiver of the low voltage output module 12 of each energy router power unit 10 in the first phase power unit group 451, the optical fiber transceiver of the low voltage output module 12 of each energy router power unit 10 in the second phase power unit group 452, and the optical fiber transceiver of the low voltage output module 12 of each energy router power unit 10 in the third phase power unit group 453 are connected to the control cabinet 44 through the second optical fiber communication link 512. Information interaction with the control cabinet 44 is realized through the communication port.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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 is implemented as a separate structure, including a separately packaged high-voltage input module and a low-voltage output module; The high-voltage input module includes a first shell, a first water-cooling heat dissipation structure and a first DC support capacitor group located in the first shell, and a first rectifier module and an inverter module connected in parallel and arranged on the back of the first water-cooling heat dissipation structure; The first DC support capacitor group is connected in parallel with the first rectifier module; 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, a second water-cooling heat dissipation structure, a second DC support capacitor group, and a second rectifier module arranged on the back of the second water-cooling heat dissipation structure in the second shell; the second DC support capacitor group is connected in parallel with the second rectifier module; 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; 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 shell; 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 first water-cooling heat dissipation structure includes a first water-cooling plate, the first water-cooling plate has a water inlet and a water outlet, the water inlet and the water outlet of the first water-cooling plate extend out of the first shell, the first rectifier module and the inverter module are arranged on one side of the water-cooling plate, and the first DC support capacitor group is located on the other side of the first water-cooling plate; The high-voltage input module further includes a first laminated busbar located in the first housing, the first laminated busbar is connected to the first DC support capacitor group, the first laminated busbar is connected to the first rectifier module and the inverter module, and the first laminated busbar is perpendicular to a plane formed by the first rectifier module and the inverter module; The second water-cooling heat dissipation structure includes a second water-cooling plate, the second water-cooling plate has a water inlet and a water outlet, the water inlet and the water outlet of the second water-cooling plate extend out of the second shell, the second rectifier module is arranged on one side of the second water-cooling plate, and the second DC support capacitor group is located on the other side of the second water-cooling plate; the water outlet of the second water-cooling plate is connected to the water inlet of the first water-cooling plate through a first connecting water pipe; The low-voltage output module also includes a second laminated busbar located in the second shell, the second laminated busbar is connected to the second DC support capacitor group, the second laminated busbar is connected to the second rectifier module, and the second laminated busbar is perpendicular to the plane where the second rectifier module is located.

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 and a first power supply arranged on the first rectifier module and the inverter module on the side facing away from the first water-cooled plate; Along the direction of the first rectifier module and the inverter module facing away from the first water-cooling plate, 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 first power supply is disposed adjacent to the first drive control circuit board group, and the first power supply 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 water-cooling plate, and a second power supply; Along the direction of the second rectifier module facing away from the second water-cooling plate, 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, 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 second power supply is arranged adjacent to the second drive control circuit board group, and the second power supply 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 includes an outer shell, a supporting structure arranged inside the outer shell, a three-phase reactor, a water cooling cabinet, a control cabinet, a three-phase power unit group arranged on the supporting structure, and a heat exchanger arranged outside the outer shell and connected to the water cooling cabinet through a heat exchange water inlet pipe and a heat exchange water outlet pipe; 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 three-phase reactor, the first phase power unit group, the second phase power unit group, and the third phase power unit group 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 7, characterized in that: The energy router substation also has a first main water outlet pipe arranged above one row of the high-voltage input modules, a second main water outlet pipe arranged above another row of the high-voltage input modules, a first main water inlet pipe arranged below one row of the low-voltage output modules, and a second main water inlet pipe arranged below another row of the low-voltage output modules. The first main water outlet pipe, the first main water inlet pipe, the second main water outlet pipe and the second main water inlet pipe are connected to the water cooling cabinet, the first main water outlet pipe is provided with a first branch water outlet corresponding to a row of the high-pressure input modules, the water outlet of the first water cooling plate in a row of the high-pressure input modules is connected to the corresponding first branch water outlet through a second connecting water pipe, the first main water inlet pipe is provided with a first branch water inlet corresponding to a row of the low-pressure output modules, the water inlet of the second water cooling plate in a row of the low-pressure output modules is connected to the corresponding The first branch water inlet is connected through a third connecting water pipe, the second main water outlet is provided with a second branch water outlet corresponding one-to-one to the high-pressure input module in another column, the water outlet of the first water-cooled plate in the other column of the high-pressure input module is connected with the corresponding second branch water outlet through a fourth connecting water pipe, the second main water inlet is provided with a second branch water inlet corresponding one-to-one to the low-pressure output module in another column, and the water inlet of the second water-cooled plate in the other column of the low-pressure output module is connected with the corresponding second branch water inlet through a fifth connecting water pipe.

9. The energy router substation according to claim 6, 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 claim 6, 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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