Electric energy distribution management device and photovoltaic power generation system

Abstract

The utility model relates to the technical field of electric energy management, and specifically provides an electric energy distribution management device and a photovoltaic power generation system, the electric energy distribution management device comprises a master control module and a single-phase ammeter module; the main control module comprises a first live wire row, a second live wire row, a third live wire row, a zero line row, a control panel and a contactor unit; the single-phase ammeter module comprises a single-phase ammeter unit; the first live wire row, the second live wire row, the third live wire row and the null wire row are respectively connected to a first live wire, a second live wire, a third live wire and a null wire in three-phase power and are connected to n contactors in the contactor unit; the n contactors are respectively connected to n single-phase electricity meters in the single-phase electricity meter unit; the n single-phase ammeters are respectively used for providing distributed electric energy to the outside; and the control panel is used for carrying out information interaction externally and is connected with the communication ends of the n single-phase ammeters, and the control end of the control panel is connected with the control ends of the n contactors, so that the technical scheme of conveniently carrying out home-entry distribution on the electric energy generated by new energy power generation is realized.

Description

Technical Field

[0001] This utility model belongs to the field of power management technology, and in particular relates to a power distribution management device and a photovoltaic power generation system. Background Technology

[0002] Currently, the new energy industry is developing rapidly, especially the widespread use of new energy sources such as solar power for power generation. In scenarios where solar power is used, the generated electricity is generally directly connected to the power grid and then distributed to users through the grid. There is a lack of a technical solution that allows the electricity generated by solar power to be directly distributed to users, which hinders the further commercial deployment and promotion of solar power. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an energy distribution management device and a photovoltaic power generation system.

[0004] This utility model provides an energy distribution management device, including a main control module and a single-phase meter module;

[0005] The main control module includes a first live wire busbar, a second live wire busbar, a third live wire busbar, a neutral wire busbar, a control board, and a contactor unit;

[0006] The single-phase electricity meter module includes a single-phase electricity meter unit;

[0007] The input terminals of the first live wire bus, the second live wire bus, and the third live wire bus are respectively used to connect to the first live wire, the second live wire, and the third live wire in the three-phase power supply.

[0008] The input terminals of the neutral busbar are used to connect to the neutral wire in the three-phase power supply;

[0009] The n output terminals of the first live wire bus, the second live wire bus, and the third live wire bus are respectively electrically connected to the live wire input terminals of the n contactors in the contactor unit;

[0010] The n output terminals of the neutral busbar are electrically connected to the neutral input terminals of the n contactors, respectively;

[0011] The live wire output terminals and neutral wire output terminals of the n contactors are respectively electrically connected to the power input terminals of the n single-phase meters in the single-phase meter unit through conductive wires;

[0012] The power output terminals of the n single-phase meters are used to provide distributed electrical energy to external users.

[0013] The first communication interface of the control board is used for external information exchange, its second communication interface is electrically connected to the communication terminals of the n single-phase meters, and its control terminal is electrically connected to the control terminals of the n contactors.

[0014] Where n is a positive integer.

[0015] In one possible implementation, the control board is connected to the n single-phase meters via RS485 communication.

[0016] In one possible implementation, the RS485 interfaces of the n single-phase meters are connected in a daisy-chain configuration.

[0017] In one possible implementation, the main control module further includes an outgoing terminal block;

[0018] The live wire output terminal and the neutral wire output terminal of the n contactors are respectively connected to the conductive wire via the output terminal block.

[0019] In one possible implementation, the main control module further includes a converter for converting RS485 communication into Ethernet communication;

[0020] The first communication interface of the control board is an RS485 interface, which is electrically connected to the RS485 terminal of the converter.

[0021] In one possible implementation, the main control module further includes a first network interface and a second network interface;

[0022] The single-phase electricity meter module also includes a third network interface;

[0023] The wire end of the first network interface is electrically connected to the network end of the converter, and its slot end serves as the external network interface.

[0024] The wire end of the second network interface is electrically connected to the second communication interface of the control board, and its slot end is electrically connected to the slot end of the third network interface through a network cable.

[0025] The line end of the third network interface is electrically connected to the communication end of the n single-phase meters.

[0026] In one possible implementation, the main control module further includes a DC power supply module;

[0027] The output terminal of the DC power module is electrically connected to the operating power terminals of the control board and the converter, respectively.

[0028] In one possible implementation, the single-phase meter module further includes a power acquisition and monitoring device;

[0029] The data acquisition terminal of the power acquisition and monitoring device is electrically connected to the power output terminal of the n single-phase meters, and its communication terminal is electrically connected to the communication terminal of the n single-phase meters.

[0030] In one possible implementation, it also includes a main control box and a meter box;

[0031] The main control module is housed within the main control box;

[0032] The single-phase meter module is installed inside the meter box.

[0033] This utility model also provides a photovoltaic power generation system, including a solar power generation array, a photovoltaic inverter, and a power distribution management device as described above;

[0034] The output of the solar power generation array is electrically connected to the input of the photovoltaic inverter;

[0035] The photovoltaic inverter is used to output three-phase power, and its output terminal is electrically connected to the power distribution and management device.

[0036] The technical solution provided by this utility model has at least the following beneficial effects:

[0037] By setting up separate main control modules and single-phase meter modules, the phase distance between the main control module and the single-phase meter module can be flexibly controlled to adapt to different application scenarios and improve deployment adaptability. By setting up control boards, contactor units, and single-phase meter units, the input three-phase electricity can be distributed to the corresponding users according to actual needs, which facilitates electricity consumption metering and distribution control and is conducive to the further commercial deployment and promotion of solar power generation. Attached Figure Description

[0038] Figure 1 A first structural schematic diagram of an energy distribution and management device provided in an embodiment of this utility model;

[0039] Figure 2 A second structural schematic diagram of an energy distribution management device provided in an embodiment of this utility model;

[0040] Figure 3 A first top view schematic diagram of an electrical power distribution and management device provided in an embodiment of this utility model;

[0041] Figure 4 A first specific three-dimensional structural schematic diagram of an energy distribution and management device provided in this embodiment of the present utility model;

[0042] Figure 5 A second specific three-dimensional structural schematic diagram of an energy distribution and management device provided in this embodiment of the present utility model;

[0043] Figure 6 A contactor control schematic diagram provided for an embodiment of this utility model;

[0044] Figure 7 A schematic diagram illustrating the connection relationship between communication terminals of single-phase electricity meters provided in this embodiment of the utility model;

[0045] Figure 8 A third structural schematic diagram of an energy distribution management device provided in this embodiment of the present invention;

[0046] Figure 9 A fourth structural schematic diagram of an energy distribution management device provided in this embodiment of the present invention;

[0047] Figure 10 A third specific three-dimensional structural schematic diagram of an energy distribution and management device provided in this embodiment of the present utility model;

[0048] Figure 11 A second top view schematic diagram of an energy distribution and management device provided in an embodiment of this utility model;

[0049] Figure 12 A schematic diagram of the layout structure of the live wire bus and the neutral wire bus provided for an embodiment of this utility model;

[0050] Figure 13 A schematic diagram of a photovoltaic power generation system provided in an embodiment of this utility model;

[0051] In the attached diagram, 10 is the main control module; 20 is the single-phase meter module; 30 is the main control box; 40 is the meter box; 11 is the first live wire busbar; 12 is the second live wire busbar; 13 is the third live wire busbar; 14 is the neutral wire busbar; 15 is the control board; 16 is the contactor unit; 17 is the outgoing terminal block; 18 is the wiring trough; 21 is the single-phase meter unit; 22 is the power acquisition and monitoring device; 101 is the first network interface; 102 is the second network interface; 103 is the fourth network interface; 141 is the parallel copper busbar; 151 is the converter; 152 is the DC power supply module; 161 is the first signal busbar; 201 is the third network interface; 202 is the fifth network interface; 211 is the second signal busbar; 212 is the third signal busbar; 301 is the wiring hole; 302 is the main control box cover; 303 is the main control box ventilation opening; 401 is the meter box cover; 402 is the meter box ventilation opening. Detailed Implementation

[0052] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.

[0053] Please refer to Figures 1 to 12 The present invention provides an energy distribution management device, including a main control module 10 and a single-phase meter module 20;

[0054] The main control module 10 includes a first live wire busbar 11, a second live wire busbar 12, a third live wire busbar 13, a neutral wire busbar 14, a control board 15, and a contactor unit 16;

[0055] The single-phase electricity meter module 20 includes a single-phase electricity meter unit 21;

[0056] The input terminals of the first live wire bus 11, the second live wire bus 12, and the third live wire bus 13 are respectively used to connect to the first live wire L1, the second live wire L2, and the third live wire L3 in the three-phase power supply.

[0057] The input terminal of the neutral busbar 14 is used to connect to the neutral wire N in the three-phase power supply;

[0058] The n output terminals of the first live wire bus 11, the second live wire bus 12, and the third live wire bus 13 are respectively electrically connected to the live wire input terminals of the n contactors in the contactor unit 16;

[0059] The n output terminals of the neutral busbar 14 are electrically connected to the neutral input terminals of the n contactors, respectively;

[0060] The live wire output terminals and neutral wire output terminals of the n contactors are respectively electrically connected to the power input terminals of the n single-phase meters in the single-phase meter unit 21 through conductive wires;

[0061] The power output terminals of the n single-phase meters are used to provide distributed electrical energy to external users.

[0062] The first communication interface of the control board 15 is used for external information exchange, its second communication interface is electrically connected to the communication terminals of the n single-phase meters, and its control terminal is electrically connected to the control terminals of the n contactors.

[0063] Where n is a positive integer.

[0064] In this embodiment, the first live wire busbar 11, the second live wire busbar 12, the third live wire busbar 13, and the neutral wire busbar 14 can be conventional copper busbars. The control board 15 can be implemented based on conventional microcontrollers or other control chips. The contactor unit 16 is implemented based on conventional contactor combinations. The three-phase power is provided by the photovoltaic inverter, specifically 220V or 380V three-phase AC power, determined according to the actual application scenario. The single-phase meter unit 21 is implemented based on conventional single-phase meter combinations and can be used to monitor the power generation of the photovoltaic inverter. In a specific implementation, n can be set to 21. The first live wire busbar 11, the second live wire busbar 12, and the third live wire busbar 13 each have 7 output terminals, for a total of 21 output terminals. The neutral wire busbar 14 also has 21 output terminals. The input terminals of the first live wire busbar 11, the second live wire busbar 12, the third live wire busbar 13, and the neutral wire busbar 14 can each be arranged in several dispersed manner according to the shape of the busbars, facilitating the selection of appropriate input terminals based on the actual three-phase power input positions during three-phase power wiring. The contactor unit 16 contains 21 contactors. The single-phase meter unit 21 contains 21 single-phase meters. The control board 15 includes 21 sets of control terminals, each set including a positive control terminal and a negative control terminal. These 21 sets of control terminals can share a single negative control terminal or each set can be independently configured. The connection relationship between the control board 15 and any contactor is as follows: Figure 6 As shown, the contactor includes control terminals A1 and A2, and switch terminals 1, 2, 3, and 4. In the control terminals of the control board 15, the positive control terminal in each group of control terminals is connected to the corresponding contactor's A1 terminal, and the negative control terminal is connected to the corresponding contactor's A2 terminal. Terminals 1 and 3 of the contactor serve as the live wire input terminal and the neutral wire input terminal, respectively, and terminals 2 and 4 serve as the live wire output terminal and the neutral wire output terminal, respectively. The single-phase meter's power input terminals include a live wire input terminal and a neutral wire input terminal, and its power output terminals include a live wire output terminal and a neutral wire output terminal. Its communication terminal can use an RS485 communication interface, meaning the single-phase meter supports RS485 communication. The first and second communication interfaces of the control board 15 can be conventional communication interfaces, but the second communication interface needs to be matched with the single-phase meter's communication terminal. The main control module 10 can also be provided with several wiring slots 18, with wire clamping ports on the wiring slots 18. The low-voltage control line between the control terminal of the control board 15 and the control terminal of the contactor can be run through the wiring trough 18. The high-voltage wires between the first live wire row 11, the second live wire row 12, the third live wire row 13, the neutral wire row 14, the contactor, etc. can be clamped in the clamping holes provided on the wiring trough 18 to fix the high-voltage wires and improve safety.

[0065] In one possible implementation, the control board 15 is connected to the n single-phase meters via RS485 communication.

[0066] In this embodiment, the second communication interface of the control board 15 and the communication terminal of the single-phase meter both adopt the conventional RS485 communication interface.

[0067] In one possible implementation, the RS485 interfaces of the n single-phase meters are connected in a daisy-chain configuration.

[0068] In this embodiment, as Figure 7 Each single-phase meter has an RS485 interface, and each RS485 interface consists of RS485+ and RS485-. In practical implementation, a terminating resistor can be connected in parallel between RS485+ and RS485- at the beginning of the network (the first single-phase meter) and the end of the network (the nth single-phase meter) to reduce signal reflection at both ends.

[0069] In one possible implementation, the main control module 10 further includes an outgoing terminal block 17;

[0070] The live wire output terminals and neutral wire output terminals of the n contactors are respectively connected to the conductive wires via the output terminal block 17.

[0071] In this embodiment, as Figure 3 The terminal block 17 can be divided into two rows, one row connecting to the live wire output terminal of the contactor and the other row connecting to the neutral wire output terminal of the contactor. By setting up the terminal block 17, the wiring convenience for connecting the conductive wire of the single-phase meter is improved. In actual connection, only one end of the conductive wire needs to be fixed to the corresponding terminal of the terminal block 17.

[0072] In one possible implementation, the main control module 10 further includes a converter 151 for converting RS485 communication into Ethernet communication;

[0073] The first communication interface of the control board 15 is an RS485 interface, which is electrically connected to the 485 terminal of the converter 151.

[0074] In this embodiment, the converter 151 is a conventional model. By setting up the converter 151, the control board 15, which is configured with RS485 communication function, can realize remote communication function without the need to set up a dedicated network module for remote communication on the control board 15, thus simplifying the design of the control board 15.

[0075] In one possible implementation, the main control module 10 further includes a first network interface 101 and a second network interface 102;

[0076] The single-phase meter module 20 also includes a third network interface 201;

[0077] The line end of the first network interface 101 is electrically connected to the network end of the converter 151, and its slot end serves as an external network interface.

[0078] The wire end of the second network interface 102 is electrically connected to the second communication interface of the control board 15, and its slot end is electrically connected to the slot end of the third network interface 201 via a network cable.

[0079] The line end of the third network interface 201 is electrically connected to the communication end of the n single-phase meters.

[0080] In this embodiment, the first network interface 101, the second network interface 102, and the third network interface 201 all use conventional network interfaces, such as RJ45 interfaces.

[0081] In one possible implementation, the main control module 10 further includes a DC power supply module 152;

[0082] The output terminal of the DC power module 152 is electrically connected to the operating power terminals of the control board 15 and the converter 151, respectively.

[0083] In this embodiment, the DC power module 152 can be a conventional model. In one specific implementation, the DC power module 152 converts 220V AC power into 12V DC power, which is output to the operating power terminals of the control board 15 and the converter 151.

[0084] In one possible implementation, such as Figure 2 and Figure 3 The main control module 10 further includes a first signal bar 161 for electrically connecting the outgoing wires in the control terminals of the n contactors;

[0085] The single-phase meter module 20 also includes a second signal bar 211 and a third signal bar 212, which are used to electrically connect the communication terminals of the n single-phase meters.

[0086] In this embodiment, the first signal bus 161, the second signal bus 211, and the third signal bus 212 are all copper busbars. The n sets of control terminals in the control terminal of the control board 15 share a single negative control terminal. Combined with... Figure 6 The outgoing wires (A2 terminals) from the control terminals of the n contactors are all connected to the first signal bar 161, and then connected to the negative control terminal of the control board 15 via data lines. Figure 7 In the single-phase meter module 20, the communication terminals of the n single-phase meters are all RS485 interfaces. The RS485+ of the n single-phase meters are uniformly electrically connected to the second signal bar 211, and the RS485- of the n single-phase meters are uniformly electrically connected to the third signal bar 212.

[0087] In one possible implementation, such as Figure 8 and Figure 9 The single-phase meter module 20 also includes a power acquisition and monitoring device 22;

[0088] The data acquisition terminal of the power acquisition and monitoring device 22 is electrically connected to the power output terminal of the n single-phase meters, and its communication terminal is electrically connected to the communication terminal of the n single-phase meters.

[0089] In this embodiment, the power consumption acquisition and monitoring device 22 can be a conventional model used to detect the power consumption of each user corresponding to a single-phase meter. The detected power consumption data can be fed back to the control board 15 through its communication terminal. In specific implementation, such as Figure 10 and Figure 11 The control board 15 can be mounted on the main control box cover 302, and the power acquisition and monitoring device 22 can be mounted on the meter box cover 401. Both the communication terminals of the power acquisition and monitoring device 22 and the single-phase meter can use RS485 interfaces. The control board 15 can communicate with the photovoltaic inverter via the fourth network interface 103 using RS485. When the power acquisition and monitoring device 22 is mounted outside the meter box 40, such as... Figure 9 The power acquisition and monitoring device 22 can be connected to the communication terminal of the single-phase meter through the fifth network interface 202.

[0090] In one possible implementation, such as Figure 4 , Figure 5 , Figure 10 , Figure 11 It also includes the main control box 30 and the meter box 40;

[0091] The main control module 10 is disposed inside the main control box 30;

[0092] The single-phase meter module 20 is installed inside the meter box 40.

[0093] In this embodiment, the main control box 30 and the meter box 40 are made of conventional materials. The top and / or upper side wall of the main control box 30 are provided with wiring holes 301 for introducing three-phase power wires into the main control box 30. The main control box 30 and the meter box 40 may respectively be provided with a main control box cover 302, a meter box cover 401, a main control box ventilation opening 303, and a meter box ventilation opening 402. It should be noted that... Figures 3 to 5 The detailed structural diagrams shown are only used to more clearly illustrate the technical solution to be protected in this application, and are not intended to limit the scope of the technology to be protected. In one specific embodiment, such as Figure 3 A guide rail is provided on the top right side of the main control box 30, and the converter 151 is mounted on this guide rail. In another specific embodiment, such as Figure 10 , Figure 11 , Figure 12 In the main control unit 30, the first live wire busbar 11, the second live wire busbar 12, and the third live wire busbar 13 can each form an input cable group with a neutral wire busbar 14. These three input cable groups are arranged side-by-side within the main control box 30, and the three neutral wire busbars 14 are connected by a parallel copper busbar 141. The n contactors in the contactor unit 16 can be divided into three groups, each corresponding to one of the three input cable groups. It should be noted that the specific layout of the components in the main control module 10 within the main control box 30, and the specific layout of the components in the single-phase meter module 20 within the meter box 40, can be adjusted according to actual implementation needs.

[0094] like Figure 13 The present invention also provides a photovoltaic power generation system, including a solar power generation array, a photovoltaic inverter, and a power distribution management device as described above;

[0095] The output of the solar power generation array is electrically connected to the input of the photovoltaic inverter;

[0096] The photovoltaic inverter is used to output three-phase power, and its output terminal is electrically connected to the power distribution and management device.

[0097] In this embodiment, the solar power generation array is composed of several conventional solar panels and can be installed on a rooftop or other open area with ample sunlight. A standard photovoltaic inverter is used to convert the direct current output from the solar power generation array into 220V or 380V three-phase alternating current, which is then output to the power distribution management device. The power distribution management device is used to distribute the three-phase alternating current (i.e., three-phase electricity) to the corresponding users.

[0098] The above embodiments should not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.

Claims

1. A power distribution and management device, characterized in that, Includes the main control module and the single-phase meter module; The main control module includes a first live wire busbar, a second live wire busbar, a third live wire busbar, a neutral wire busbar, a control board, and a contactor unit; The single-phase electricity meter module includes a single-phase electricity meter unit; The input terminals of the first live wire bus, the second live wire bus, and the third live wire bus are respectively used to connect to the first live wire, the second live wire, and the third live wire in the three-phase power supply. The input terminals of the neutral busbar are used to connect to the neutral wire in the three-phase power supply; The n output terminals of the first live wire bus, the second live wire bus, and the third live wire bus are respectively electrically connected to the live wire input terminals of the n contactors in the contactor unit; The n output terminals of the neutral busbar are electrically connected to the neutral input terminals of the n contactors, respectively; The live wire output terminals and neutral wire output terminals of the n contactors are respectively electrically connected to the power input terminals of the n single-phase meters in the single-phase meter unit through conductive wires; The power output terminals of the n single-phase meters are used to provide distributed electrical energy to external users. The first communication interface of the control board is used for external information exchange, its second communication interface is electrically connected to the communication terminals of the n single-phase meters, and its control terminal is electrically connected to the control terminals of the n contactors. Where n is a positive integer.

2. The power distribution management device according to claim 1, characterized in that, The control board is connected to the n single-phase meters via RS485 communication.

3. The power distribution management device according to claim 2, characterized in that, The RS485 interfaces of the n single-phase meters are connected in a daisy-chain configuration.

4. The power distribution management device according to claim 1, characterized in that, The main control module also includes an outgoing terminal block; The live wire output terminal and the neutral wire output terminal of the n contactors are respectively connected to the conductive wire via the output terminal block.

5. The power distribution management device according to claim 1, characterized in that, The main control module also includes a converter for converting RS485 communication into Ethernet communication; The first communication interface of the control board is an RS485 interface, which is electrically connected to the RS485 terminal of the converter.

6. The power distribution management device according to claim 5, characterized in that, The main control module also includes a first network interface and a second network interface; The single-phase electricity meter module also includes a third network interface; The wire end of the first network interface is electrically connected to the network end of the converter, and its slot end serves as the external network interface. The wire end of the second network interface is electrically connected to the second communication interface of the control board, and its slot end is electrically connected to the slot end of the third network interface through a network cable. The line end of the third network interface is electrically connected to the communication end of the n single-phase meters.

7. The power distribution management device according to claim 5, characterized in that, The main control module also includes a DC power supply module; The output terminal of the DC power module is electrically connected to the operating power terminals of the control board and the converter, respectively.

8. The power distribution management device according to claim 1, characterized in that, The single-phase electricity meter module also includes an electricity acquisition and monitoring device; The data acquisition terminal of the power acquisition and monitoring device is electrically connected to the power output terminal of the n single-phase meters, and its communication terminal is electrically connected to the communication terminal of the n single-phase meters.

9. The power distribution management device according to claim 1, characterized in that, It also includes the main control box and the meter box; The main control module is housed within the main control box; The single-phase meter module is installed inside the meter box.

10. A photovoltaic power generation system, characterized in that, Solar power generation array, photovoltaic inverter, and power distribution management device as described in any one of claims 1 to 9; The output of the solar power generation array is electrically connected to the input of the photovoltaic inverter; The photovoltaic inverter is used to output three-phase power, and its output terminal is electrically connected to the power distribution and management device.

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