Airport photovoltaic power supply system

Abstract

The utility model relates to an airport photovoltaic power supply system, and belongs to the field of photovoltaic devices, the airport photovoltaic power supply system comprises a monitoring unit, an energy storage unit, a photovoltaic power generation device, a power supply device and a micro-grid, the monitoring unit is arranged on a transformer, the power supply device is connected with the photovoltaic power generation device, the power supply device and the energy storage unit are both connected to the micro-grid, and the micro-grid is connected with the energy storage unit. The monitoring unit communicates with the energy storage unit, and the energy storage unit communicates with the power supply device. The stability of the power supply system is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic devices, and in particular to an airport photovoltaic power supply system. Background Art

[0002] In the energy planning work of civil airports, the requirements for renewable energy are getting higher and higher. Therefore, it is particularly important to rationally apply, reasonably distribute, manage and control renewable energy in airport buildings.

[0003] The smart energy management and control system of civil airports includes various energy subsystems of the airport, energy monitoring systems at all levels, and a smart energy management and control platform. In the smart energy management system of civil airports, the airport can select energy types according to actual conditions and build a corresponding energy supply system. The energy subsystem includes the energy supply side and the energy consumption side. The energy supply side includes power supply, gas supply, cooling, air supply, and various water systems. Among them, the photovoltaic power supply system is an important component of the airport power supply system.

[0004] With the rapid development of photovoltaic power generation technology, intelligent monitoring technology, computer communication and safety management technology, how to make buildings achieve low energy consumption, zero energy consumption, or even negative energy consumption while achieving safety, reliability and simple management and control has received more and more attention. However, photovoltaic power generation is easily affected by meteorological conditions such as light and temperature, and has obvious problems of intermittency and irregularity. It is prone to frequent disconnection from the grid, resulting in frequent unstable shocks to transformers and low stability of the power supply system. Utility Model Content

[0005] In order to improve the stability of the power supply system of a civil airport, the present application provides an airport photovoltaic power supply system.

[0006] An airport photovoltaic power supply system comprises a monitoring unit, an energy storage unit, a photovoltaic power generation device, a power supply device and a microgrid, wherein the monitoring unit is arranged on a transformer, the power supply device is connected to the photovoltaic power generation device, the power supply device and the energy storage unit are both connected to the microgrid, the monitoring unit communicates with the energy storage unit, and the energy storage unit communicates with the power supply device.

[0007] By adopting the above technical solution, the monitoring unit monitors the load of the transformer, and when the load status of the transformer allows the energy storage unit to be connected to the power grid, a signal is sent to the energy storage unit, the energy storage unit is connected to the grid, the power supply device turns on the switching switch in the photovoltaic power generation device, and transfers the electric energy in the photovoltaic battery to the battery pack through the microgrid, so as to provide electric energy to the energy storage unit in time and improve the stability of the power supply system of the civil airport.

[0008] Furthermore, the monitoring unit includes a first processor, a load detection device and a first communication module, the load detection device and the first communication module are both connected to the first processor, the energy storage unit includes a second processor and a second communication module connected thereto, and the first communication module and the second communication module are connected thereto.

[0009] By adopting the above technical solution, the load detection device detects the load of the transformer and sends the detection result to the first processor. When the transformer condition allows the energy storage unit to be connected to the grid, the first processor communicates with the energy storage unit through the second communication module to connect the energy storage unit to the grid.

[0010] Furthermore, the energy storage unit also includes a battery pack, a grid-connected inverter and a grid-connected circuit connected in sequence, and the second processor is connected to the battery pack.

[0011] By adopting the above technical solution, the battery pack is connected to the power grid through the grid-connected inverter and the grid-connected circuit, thereby improving the power supply stability of civil airports.

[0012] Furthermore, the second processor is also connected to a first power detection circuit, and the first power detection circuit is connected to the battery pack.

[0013] By adopting the above technical solution, the first power detection circuit can monitor the power of the battery pack and promptly remind the second processor when the power is insufficient, so that the second processor communicates with the power supply device for power supply.

[0014] Furthermore, the power supply device includes a third processor, a third communication module and a switching switch component, the third communication module and the switching switch component are both connected to the third processor, the switching switch component is connected to the photovoltaic power generation device, and the third communication module is connected to the second communication module.

[0015] By adopting the above technical solution, the power supply device communicates with the energy storage unit, and when the battery pack needs to be charged, the switching component is opened and the electric energy of the photovoltaic power generation device can be delivered.

[0016] Furthermore, the switching switch assembly and the battery pack are both connected to the microgrid.

[0017] Furthermore, the photovoltaic power generation device includes multiple groups of photovoltaic power generation devices, each group of photovoltaic power generation devices includes photovoltaic components and photovoltaic batteries connected in sequence, the switching switch component includes multiple switching switches, and each photovoltaic battery is connected to one switching switch.

[0018] By adopting the above technical solution, the photovoltaic power generation device is a small power generation unit, which can be set up in different areas respectively, and the switching switch controls each photovoltaic power generation device separately, which is convenient for separate control.

[0019] Furthermore, the photovoltaic power generation device also includes a second power detection circuit, and the second power detection circuit is connected to the third processor and the photovoltaic battery respectively.

[0020] By adopting the above technical solution, the second power detection circuit can monitor the power of the photovoltaic battery and timely monitor the power generation status of each photovoltaic power generation device.

[0021] Furthermore, a side switch is connected between at least two of the photovoltaic power generation devices, the side switch is arranged between the photovoltaic component and the photovoltaic battery, and the side switch is connected to the third processor.

[0022] By adopting the above technical solution, the side branch switch can connect two photovoltaic power generation devices, and when one of the photovoltaic batteries is fully charged, the connected photovoltaic battery can be charged.

[0023] Furthermore, it also includes a remote monitoring device, which includes a data processing center. The data processing center is connected to a storage device and a cloud platform, and the data processing center communicates with the monitoring unit, the energy storage unit and the power supply device.

[0024] By adopting the above technical solution, the remote monitoring device can monitor the entire photovoltaic power generation system, facilitating data storage and real-time observation by staff.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The monitoring unit monitors the load of the transformer, and when the load status of the transformer allows the energy storage unit to be connected to the grid, it sends a signal to the energy storage unit, and the energy storage unit is connected to the grid. The power supply device turns on the switch in the photovoltaic power generation device, and transfers the electric energy in the photovoltaic battery to the battery group through the microgrid, so as to provide electric energy to the energy storage unit in time and improve the stability of the power supply system of the civil airport;

[0027] 2. The photovoltaic power generation device is a small power generation unit, which can be set up in different areas. The switch controls each photovoltaic power generation device separately, which is convenient for separate control;

[0028] 3. The side switch can connect two photovoltaic power generation devices. When one photovoltaic battery is fully charged, it can charge the connected photovoltaic battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1It is a schematic diagram of the overall structure of this application.

[0030] Explanation of the accompanying drawings: 1. Monitoring unit; 11. First processor; 12. Load detection device; 13. First communication module; 2. Energy storage unit; 21. Second processor; 22. Second communication module; 23. Battery pack; 24. Grid-connected inverter; 25. Grid-connected circuit; 26. First power detection circuit; 3. Photovoltaic power generation device; 31. Photovoltaic power generation device; 311. Photovoltaic module; 312. Photovoltaic battery; 313. Second power detection circuit; 32. Branch switch; 4. Power supply device; 41. Third processor; 42. Third communication module; 43. Switching switch assembly; 431. Switching switch; 5. Microgrid; 6. Remote monitoring device; 61. Data processing center; 62. Memory; 63. Cloud platform. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 This application is described in further detail.

[0032] The present application embodiment discloses an airport photovoltaic power supply system, which is applied to the energy system of a civil airport. Figure 1 The airport photovoltaic power supply system includes a monitoring unit 1, an energy storage unit 2, a photovoltaic power generation device 3, a power supply device 4 and a microgrid 5.

[0033] The photovoltaic power generation device 3 converts solar energy into electrical energy, the energy storage unit 2 is used to store part of the electrical energy and to connect to the power grid, the power supply device 4 is connected to the photovoltaic power generation device 3, and the power supply device 4 and the energy storage unit 2 are both connected to the microgrid 5. Therefore, the power supply device 4 can concentrate the electrical energy generated by the photovoltaic power generation device 3 and transmit it to the energy storage unit 2 through the microgrid 5, and the energy storage unit 2 integrates the electrical energy into the power grid.

[0034] In order to better control the timing of the energy storage unit 2 being incorporated into the power grid, the monitoring unit 1 is set on the transformer to monitor the load of the transformer. The monitoring unit 1 includes a first processor 11, a load detection device 12 and a first communication module 13, wherein the load detection device 12 and the first communication module 13 are both connected to the first processor 11, the load detection device 12 can detect the load of the transformer and send the detection information to the first processor 11, and the first processor 11 communicates with the outside world, such as the power supply device 4 and the energy storage unit 2, through the first communication module 13.

[0035] Furthermore, the energy storage unit 2 includes a second processor 21, a second communication module 22 and a battery pack 23, the second communication module 22 is connected to the second processor 21, the battery pack 23 is connected to the second processor 21 through a charge and discharge circuit, and the second communication module 22 communicates with the first communication module 13. Therefore, the monitoring unit 1 can communicate with the energy storage unit 2.

[0036] The battery pack 23 is also connected in sequence to the grid-connected inverter 24 and the grid-connected circuit 25. When the load capacity of the transformer monitored by the first processor 11 is less than a preset value, it can be determined that the transformer is capable of bearing the grid-connected energy storage unit 2. The first processor 11 determines that the grid-connected energy storage unit 2 will not exceed the transformer capacity limit. At this time, the first communication module 13 communicates with the energy storage unit 2, and the second processor 21 controls the charge and discharge control circuit to control the discharge of the battery pack 23. The electricity discharged by the battery pack 23 enters the power grid through the grid-connected inverter 24 and the grid-connected circuit 25.

[0037] In order to fully charge the battery pack 23 in time, the second processor 21 is connected to the first power detection circuit 26, and the first power detection circuit 26 is connected to the photovoltaic battery pack 23. The first power detection circuit 26 detects the power of the battery pack 23 and sends the detection result to the second processor 21. When the power is lower than the preset value, the second processor 21 sends a signal to the power supply device 4, so that the power supply device 4 supplies power to the energy storage unit 2.

[0038] The power supply device 4 includes a third processor 41, a third communication module 42 and a switch assembly 43, wherein the third communication module 42 and the switch assembly 43 are both connected to the third processor 41. The third communication module 42 communicates with the second communication module 22, so the energy storage unit 2 can communicate with the power supply device 4.

[0039] The switch assembly 43 is connected to the photovoltaic power generation device 3 and the microgrid 5 respectively, and the photovoltaic battery group 23 is connected to the microgrid 5. When the power of the battery group 23 is lower than the preset value, the third processor 41 controls the switch assembly 43 to open, so that the electric energy generated by the photovoltaic power generation device 3 is transferred to the battery group 23 through the microgrid 5.

[0040] Furthermore, the photovoltaic power generation device 3 includes a plurality of photovoltaic power generation devices 31. Since the airport has a large area, the photovoltaic power generation devices 31 can be respectively installed at different locations in the airport to reduce the area used and improve the energy conversion efficiency.

[0041] The photovoltaic power generation device 31 includes a photovoltaic assembly 311 and a photovoltaic storage battery 312 connected in sequence. The photovoltaic assembly 311 converts solar energy into electrical energy and stores it in the photovoltaic storage battery 312. The switch assembly 43 includes a plurality of switches 431, the number of which is equal to the number of the photovoltaic power generation device 31, and the photovoltaic storage battery 312 is connected to the switches 431. Therefore, when the third processor 41 turns on the switch 431, the corresponding photovoltaic storage battery 312 outputs electrical energy.

[0042] For further monitoring, the photovoltaic power generation electronic device 31 further includes a second power detection circuit 313, which is connected to the photovoltaic battery 312 and the third processor 41 respectively, and the second power detection circuit 313 can detect the power of the corresponding photovoltaic battery 312 and send it to the third processor 41. The third processor 41 preferentially opens the switch 431 of the photovoltaic power generation electronic device 31 with a power greater than a preset critical value according to the power of each photovoltaic battery 312, and temporarily closes the switch 431 of the photovoltaic power generation electronic device 31 with a power not greater than the preset critical value, so that the photovoltaic component 311 continues to store electricity.

[0043] Furthermore, the photovoltaic power generation efficiency at various locations in the airport is different. The photovoltaic battery 312 of the photovoltaic power generation electronic device 31 with high power generation efficiency may be fully charged quickly, and the excess power cannot be stored in time, while the photovoltaic battery 312 of the photovoltaic power generation electronic device 31 with low power generation efficiency is slowly fully charged, and the utilization rate of the photovoltaic battery 312 is low. Therefore, a side branch switch 32 is connected between at least two groups of photovoltaic power generation electronic devices 31, and the side branch switch 32 is set between the photovoltaic module 311 and the photovoltaic battery 312. The side branch switch 32 is connected to the third processor 41. In order to avoid large losses due to long distances, in actual use, a side branch switch 32 can be set between two groups of photovoltaic power generation electronic devices 31 that are geographically adjacent. When the third processor 41 detects that a photovoltaic battery 312 is fully charged and the adjacent photovoltaic battery 312 is not fully charged, and the switching switch 431 is not turned on, the third processor 41 controls the opening of the side switch 32 connected to the photovoltaic electronic device 31, so that the newly generated electric energy in the photovoltaic electronic device 31 is stored in the adjacent photovoltaic battery 312.

[0044] The embodiment of the present application also includes a remote monitoring device 6, which includes a data processing center 61. The data processing center 61 is connected to a memory 62 and a cloud platform 63, and the data processing center 61 communicates with the first processor 11, the second processor 21 and the third processor 41.

[0045] The implementation principle of an airport photovoltaic power supply system in the embodiment of the present application is as follows: the monitoring unit 1 monitors the load of the transformer, and when the load state of the transformer allows the energy storage unit 2 to be connected to the power grid, a signal is sent to the energy storage unit 2, and the energy storage unit 2 is connected to the grid. And when the energy storage unit 2 is insufficient in power, the power supply device 4 preferentially turns on the switch 431 corresponding to the fully charged photovoltaic battery 312 in the photovoltaic power generation device 3, and transfers the electric energy in the photovoltaic battery 312 to the battery group 23 through the microgrid 5, so as to provide electric energy to the energy storage unit 2 in a timely manner.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An airport photovoltaic power supply system, characterized by: The invention comprises a monitoring unit (1), an energy storage unit (2), a photovoltaic power generation device (3), a power supply device (4) and a microgrid (5), wherein the monitoring unit (1) is arranged on a transformer, the power supply device (4) is connected to the photovoltaic power generation device (3), the power supply device (4) and the energy storage unit (2) are both connected to the microgrid (5), the monitoring unit (1) communicates with the energy storage unit (2), and the energy storage unit (2) communicates with the power supply device (4).

2. The airport photovoltaic power supply system according to claim 1, characterized in that: The monitoring unit (1) comprises a first processor (11), a load detection device (12) and a first communication module (13), wherein the load detection device (12) and the first communication module (13) are both connected to the first processor (11), and the energy storage unit (2) comprises a second processor (21) and a second communication module (22) connected thereto, wherein the first communication module (13) and the second communication module (22) are connected thereto.

3. The airport photovoltaic power supply system according to claim 2, characterized in that: The energy storage unit (2) further comprises a battery pack (23), a grid-connected inverter (24) and a grid-connected circuit (25) which are connected in sequence, and the second processor (21) is connected to the battery pack (23).

4. The airport photovoltaic power supply system according to claim 3, characterized in that: The second processor (21) is also connected to a first power detection circuit (26), and the first power detection circuit (26) is connected to the battery pack (23).

5. The airport photovoltaic power supply system according to claim 4, characterized in that: The power supply device (4) comprises a third processor (41), a third communication module (42) and a switch assembly (43); the third communication module (42) and the switch assembly (43) are both connected to the third processor (41); the switch assembly (43) is connected to the photovoltaic power generation device (3); and the third communication module (42) is connected to the second communication module (22).

6. The airport photovoltaic power supply system according to claim 5, characterized in that: The switch assembly (43) and the battery pack (23) are both connected to the microgrid (5).

7. The airport photovoltaic power supply system according to claim 5, characterized in that: The photovoltaic power generation device (3) comprises a plurality of groups of photovoltaic power generation devices (31), each group of the photovoltaic power generation devices (31) comprises a photovoltaic assembly (311) and a photovoltaic storage battery (312) connected in sequence, the switching switch assembly (43) comprises a plurality of switching switches (431), and each photovoltaic storage battery (312) is connected to one of the switching switches (431).

8. The airport photovoltaic power supply system according to claim 7, characterized in that: The photovoltaic power generation device (31) further comprises a second power detection circuit (313), wherein the second power detection circuit (313) is connected to the third processor (41) and the photovoltaic storage battery (312) respectively.

9. The airport photovoltaic power supply system according to claim 8, characterized in that: A side switch (32) is connected between at least two of the photovoltaic electronic devices (31); the side switch (32) is arranged between the photovoltaic assembly (311) and the photovoltaic storage battery (312); and the side switch (32) is connected to the third processor (41).

10. The airport photovoltaic power supply system according to claim 1, characterized in that: It also includes a remote monitoring device (6), the remote monitoring device (6) including a data processing center (61), the data processing center (61) is connected to a memory (62) and a cloud platform (63), and the data processing center (61) communicates with the monitoring unit (1), the energy storage unit (2) and the power supply device (4).

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