Photovoltaic micro-grid power generation system
By introducing a first bus and a second bus, along with a power distribution mechanism and a management platform, the problem of the inability to uniformly allocate photovoltaic and energy storage devices in existing technologies is solved. This enables flexible power dispatch and interference-free parallel connection of loads, improving the system's flexibility and reliability.
Patent Information
- Application Number
- CN202423207699.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing photovoltaic and energy storage devices cannot achieve unified allocation and monitoring, which leads to the need to add multiple independent systems in situations with high load demand, making it impossible to flexibly dispatch power.
The design employs a first busbar and a second busbar to connect the photovoltaic power generation unit and the energy storage unit. It also dispatches power through the power distribution unit and achieves unified control and monitoring of photovoltaic, energy storage and power grid through the management and control platform.
It enables flexible scheduling of multiple power supplies and interference-free parallel connection of loads, facilitates capacity expansion, and improves the system's flexibility and reliability through unified monitoring by the management platform.
Smart Images
Figure CN223872053U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of photovoltaic power generation, in particular to a photovoltaic micro-grid power generation system. BACKGROUND
[0002] Under the background of double carbon, the proportion of renewable energy such as solar energy and wind power generation is gradually increasing. Distributed power supply has the advantages of small investment, environmental protection and flexibility, and its development scale is rapidly expanding. However, the randomness and volatility of distributed power supply are uncontrollable, and large-scale application and access also bring great challenges and impacts to traditional power grids. The proposal of micro-grid realizes the flexible, large and diverse grid connection of distributed power supply. Realizing reliable supply of various energy forms of load is an effective way to realize active distribution network, and makes the traditional power grid transit to smart grid. The photovoltaic micro-grid power generation system generally refers to a small photovoltaic power generation and distribution system composed of photovoltaic, energy storage device, energy conversion device, load, monitoring and protection device and the like.
[0003] In the prior art, photovoltaic and energy storage devices are usually connected to loads in a one-to-one mode through energy conversion devices. In the case of large power supply or load demand, multiple systems need to be added, and each system is independent, which cannot be uniformly deployed and monitored. CONTENT OF THE UTILITY MODEL
[0004] The application provides a photovoltaic micro-grid power generation system capable of flexible power distribution.
[0005] The photovoltaic micro-grid power generation system provided by the application adopts the following technical scheme:
[0006] A photovoltaic micro-grid power generation system, comprising a first bus, a second bus, a power distribution mechanism, a power grid and a control platform; the first bus is connected with a photovoltaic power generation mechanism and an energy storage mechanism; the second bus is connected with a plurality of loads, and the plurality of loads are connected in parallel; the power distribution mechanism is connected to the first bus and the second bus, and the power grid is connected to the power distribution mechanism.
[0007] Preferably, the photovoltaic power generation mechanism comprises a photovoltaic array, a photovoltaic inverter and a photovoltaic detection device, the photovoltaic array is connected to the input end of the photovoltaic inverter and the photovoltaic detection device, and the output end of the photovoltaic inverter is connected to the first bus.
[0008] Preferably, the energy storage mechanism comprises a battery, an energy storage converter and a battery detection device, the battery is connected to the energy storage converter and the battery detection device, and the energy storage converter is connected to the first bus.
[0009] Preferably, a plurality of detection instruments are connected to the plurality of loads respectively, and the plurality of detection instruments are connected to a load detection device.
[0010] Preferably, the management and control platform further comprises a detection module, and the detection module is connected to the photovoltaic detection device, the battery detection device and the load detection device.
[0011] Preferably, the management and control platform further comprises a detection module, and the detection module is connected to the photovoltaic detection device, the battery detection device and the load detection device.
[0012] In summary, the present application has at least one of the following beneficial technical effects:
[0013] 1. The present application collects the electric energy from the photovoltaic power generation mechanism and the energy storage mechanism through the first bus, and flexibly dispatches the electric energy from the photovoltaic power generation mechanism, the energy storage mechanism and the power grid through the power distribution mechanism, fully utilizes the multiple power sources to carry the load, and makes the multiple loads parallel through the second bus, so that the electric energy for carrying the load can be delivered by the same dispatching, and the expansion is convenient.
[0014] 2. Through the management and control center, the user can send corresponding instructions to the photovoltaic control module, the energy storage control module and the power grid control module through the man-machine interaction module, so as to control the corresponding devices. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a schematic diagram of the overall structure of the preferred embodiment of the present application.
[0016] Explanation of reference numerals: 1, first bus; 2, second bus; 3, power distribution mechanism; 4, power grid; 5, management and control platform; 51, man-machine interaction module; 52, photovoltaic control module; 53, energy storage control module; 54, power grid control module; 55, detection module; 6, photovoltaic power generation mechanism; 61, photovoltaic array; 62, photovoltaic inverter; 63, photovoltaic detection device; 7, energy storage mechanism; 71, battery; 72, energy storage converter; 73, battery detection device; 8, load; 9, detection instrument; 10, load detection device. DETAILED DESCRIPTION
[0017] The present application will be further described in detail below with reference to the accompanying drawings.
[0018] The present application provides a photovoltaic micro-grid power generation system, which comprises a first bus, a power distribution mechanism, a power grid, a management and control platform, a photovoltaic power generation mechanism, an energy storage mechanism and a load. Figure 1As shown, it comprises a first bus 1, a second bus 2 and a power distribution mechanism 3 and a power grid 4; the first bus 1 is connected with a photovoltaic power generation mechanism 6 and an energy storage mechanism 7; the second bus 2 is connected with a plurality of loads 8, and the plurality of loads 8 are connected in parallel; the power distribution mechanism 3 is connected on the first bus 1 and the second bus 2, the power grid 4 is connected on the power distribution mechanism 3, and the power distribution mechanism 3 is specifically a power distribution room.
[0019] The photovoltaic micro-grid power generation system provided in the application converts solar energy into electric energy by the photovoltaic power generation mechanism 6, and delivers the electric energy to the plurality of loads 8 through the first bus 1, the power distribution mechanism 3 and the second bus 2, and stores the excess electric energy in the energy storage mechanism 7. When the photovoltaic power generation mechanism 6 is insufficient to function for the plurality of loads 8, the energy storage mechanism 7 delivers electric energy to the plurality of loads 8 through the first bus 1, the power distribution mechanism 3 and the second bus 2 under the dispatching of the power distribution mechanism 3, and functions together with the photovoltaic power generation mechanism 6 to carry load. When the electric energy provided by the photovoltaic power generation mechanism 6 and the energy storage mechanism 7 is insufficient to carry load, the power grid 4 delivers electric energy to the plurality of loads 8 through the power distribution mechanism 3 and the second bus 2 under the dispatching of the power distribution mechanism 3, and functions together with the photovoltaic power generation mechanism 6 and the energy storage mechanism 7 to carry load. In this way, the electric energy from the photovoltaic power generation mechanism 6 and the energy storage mechanism 7 is collected through the first bus 1, and the electric energy from the photovoltaic power generation mechanism 6, the energy storage mechanism 7 and the power grid 4 is dispatched flexibly through the power distribution mechanism 3 to fully utilize the plurality of power sources to carry load. The plurality of loads 8 are connected in parallel through the second bus 2, so that the loads 8 do not interfere with each other, the electric energy used to carry load can also be delivered by the same dispatching, and the capacity can be expanded conveniently.
[0020] The photovoltaic power generation mechanism 6 comprises a photovoltaic array 61, a photovoltaic inverter 62 and a photovoltaic detection device 63. The photovoltaic array 61 is connected to the input end of the photovoltaic inverter 62 and the photovoltaic detection device 63, and the output end of the photovoltaic inverter 62 is connected to the first bus 1. Specifically, the photovoltaic array 61 can be installed on the roof of a high-rise building to collect solar energy and convert the solar energy into electric energy. The photovoltaic inverter 62 is a centralized inverter, which collects the direct current generated by the photovoltaic array 61 into larger direct current power and then inverts it. The photovoltaic detection device 63 is used to detect the temperature and power of the photovoltaic array 61.
[0021] The energy storage mechanism 7 comprises a battery 71, an energy storage converter 72 and a battery detection device 73, the battery 71 is connected to the energy storage converter 72 and the battery detection device 73, and the energy storage converter 72 is connected to the first bus 1. The energy storage converter 72 is a 500KW energy storage converter 72, which is used to control the charging and discharging process of the battery 71, to convert AC and DC, and the battery detection device 73 is used to detect the voltage, current, power and communication protocol of the battery 71. When the battery 71 needs to be discharged, the output voltage of the battery 71 is converted into the required voltage by the energy storage converter 72, and the power is supplied to the load 8 after being distributed by the power distribution mechanism 3. When the battery 71 needs to be charged due to insufficient power, the photovoltaic array 61 delivers power to the energy storage converter 72 through the photovoltaic inverter 62 and the first bus 1, and the energy storage converter 72 converts the output voltage of the power into the voltage of the battery 71, thereby charging the battery 71.
[0022] A plurality of loads 8 are respectively connected with detection instruments 9, and the plurality of detection instruments 9 are connected to a load detection device 10. The detection instrument 9 comprises a multifunctional instrument for detecting current, voltage, power, frequency and harmonic, and transmits the detected data to the load detection device 10.
[0023] The photovoltaic micro-grid power generation system provided by the application further comprises a management and control platform 5, the management and control platform 5 comprises a man-machine interaction module 51, a photovoltaic control module 52, an energy storage control module 53 and a power grid control module 54; the man-machine interaction module 51 is connected to the photovoltaic control module 52, the energy storage control module 53 and the power grid control module 54; the photovoltaic control module 52 is connected to the photovoltaic inverter 62; the energy storage control module 53 is connected to the energy storage converter 72; and the power grid control module 54 is connected to the power distribution mechanism 3.
[0024] The management and control platform 5 further comprises a detection module 55, which is connected to the photovoltaic detection device 63, the battery detection device 73 and the load detection device 10. The detection module 55 is used to obtain photovoltaic data from the photovoltaic detection device 63, battery 71 data from the battery detection device 73 and load 8 data from the load detection device 10, and display them on the man-machine interaction module 51. In this way, the user can send corresponding instructions to the photovoltaic control module 52, the energy storage control module 53 and the power grid control module 54 through the man-machine interaction module 51, so as to control the corresponding devices.
[0025] The above are preferred embodiments of the application, but do not limit the protection scope of the application, therefore: any equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.
Claims
1. A photovoltaic microgrid power generation system, characterized in that: It includes the first busbar (1), the second busbar (2), the power distribution unit (3), the power grid (4), and the control platform (5); The first busbar (1) is connected to a photovoltaic power generation mechanism (6) and an energy storage mechanism (7); The second busbar (2) is connected to multiple loads (8), which are connected in parallel. The power distribution mechanism (3) is connected to the first busbar (1) and the second busbar (2), and the power grid (4) is connected to the power distribution mechanism (3); The photovoltaic power generation mechanism (6) includes a photovoltaic array (61), a photovoltaic inverter (62), and a photovoltaic testing device (63). The photovoltaic array (61) is connected to the input end of the photovoltaic inverter (62) and the photovoltaic testing device (63). The output end of the photovoltaic inverter (62) is connected to the first bus (1). The energy storage mechanism (7) includes a battery (71), an energy storage converter (72), and a battery testing device (73). The battery (71) is connected to the energy storage converter (72) and the battery testing device (73). The energy storage converter (72) is connected to the first bus (1). Each of the multiple loads (8) is connected to a detection instrument (9), and the multiple detection instruments (9) are connected to the load detection device (10); It also includes a management and control platform (5), which includes a human-machine interaction module (51), a photovoltaic control module (52), an energy storage control module (53), and a grid control module (54); The human-machine interaction module (51) is connected to the photovoltaic control module (52), the energy storage control module (53), and the grid control module (54); The photovoltaic control module (52) is connected to the photovoltaic inverter (62); The energy storage control module (53) is connected to the energy storage converter (72); The power grid control module (54) is connected to the power distribution mechanism (3); Users can send corresponding commands to the photovoltaic control module (52), the energy storage control module (53), and the grid control module (54) through the human-machine interaction module (51) to control the corresponding equipment.
2. The photovoltaic microgrid power generation system according to claim 1, characterized in that: The control platform (5) also includes a detection module (55), which is connected to the photovoltaic detection device (63), the battery detection device (73) and the load detection device (10).