Multi-energy complementary energy storage system

Abstract

The invention is suitable for the technical field of energy storage, and provides a multi-energy complementary energy storage system, which comprises a cloud control module, a load unit, a variable grid inverter, an energy generating unit, a storage battery, a wind-solar complementary off-grid controller, a photovoltaic module and a wind power generation module, and is characterized in that the wind power generation module and the photovoltaic module are electrically connected with the wind-solar complementary off-grid controller; the wind-solar complementary off-grid controller is electrically connected with the storage battery, the energy generation unit is electrically connected with the storage battery, the storage battery can store electric energy generated by the energy generation unit, the wind power generation assembly and the photovoltaic assembly, the storage battery is electrically connected with the grid-changing inverter, and the grid-changing inverter is electrically connected with the load unit. The power generation power of the energy generation unit, the photovoltaic assembly and the wind power generation assembly is complemented and coordinated, and the problems that waste is caused due to too large power generation power and normal use of the load unit is affected due to too small power generation power are avoided as much as possible.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and more particularly, to a multi-energy complementary energy storage system. Background Art

[0002] With the development of power generation technology, multiple different types of power generation modes are integrated into the same power grid, and the types of grid fluctuations or failures are also diversified. The impact of the same fluctuation or failure on power generation systems of different modes is also different. Therefore, the realization of multi-energy coupling complementary energy storage systems has become particularly urgent and important.

[0003] However, existing energy storage systems are unable to provide targeted compensation based on the actual requirements and specific fluctuations of the power grid. At the same time, if the power generation system is under low energy output conditions for a long time, the current single energy mode energy storage system will be unable to replenish energy for a long time, which will affect the performance and service life of the energy storage medium of the energy storage system. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a multi-energy complementary energy storage system.

[0005] To achieve the above object, the present invention provides the following technical solutions: A multi-energy complementary energy storage system includes a cloud control module, a load unit, a grid-variable inverter, an energy generating unit, a battery, a wind-solar complementary off-grid controller, a photovoltaic module and a wind power generation module. The wind power generation module and the photovoltaic module are both electrically connected to the wind-solar complementary off-grid controller, the wind-solar complementary off-grid controller is electrically connected to the battery, the energy generating unit is electrically connected to the battery, the battery can store the electric energy generated by the energy generating unit, the wind power generation module and the photovoltaic module, the battery is electrically connected to the grid-variable inverter, the grid-variable inverter is electrically connected to the load unit, and the cloud control module is respectively connected to the wind-solar complementary off-grid controller and the load unit data.

[0006] The present invention is further configured as follows: the grid-variable inverter includes a shell, a ventilation plate is provided on the side of the shell, a plurality of ventilation holes are opened on the ventilation plate and are all connected to the interior of the shell, and a heat dissipation fan is provided on the side of the shell away from the ventilation plate to extract heat from the inside of the shell.

[0007] The present invention is further configured as follows: a filter for blocking dust is provided in the ventilation hole, an inclined groove extending from the outer surface of the ventilation plate is provided on the side of the bottom wall of the ventilation hole away from the shell, a movable plate is provided on the side of the filter away from the shell, a cleaning brush in contact with the filter is provided on the side of the movable plate close to the filter, and a connecting rod for controlling the up and down displacement of the movable plate is provided on the movable plate.

[0008] The present invention is further configured as follows: a rotating shaft is rotatably connected to the inner wall of the ventilation hole close to the shell, the outer surface of the rotating shaft is sleeved with fan blades, the outer surface of the rotating shaft is sleeved with a cam, a plurality of transmission cavities are opened in the ventilation plate, the transmission cavity is located on the upper side of the ventilation hole, a lever shaft is rotatably connected between the inner walls on both sides of the transmission cavity opposite to each other, the outer surface of the lever shaft is sleeved with a rotating plate, and a contact push rod is provided on the outer surface of the cam, the lower end of the contact push rod is hemispherical and contacts the outer surface of the cam.

[0009] The present invention is further configured such that the ventilation hole is horn-shaped on a side close to the shell.

[0010] The present invention is further configured as follows: the upper end of the contact push rod slides through the transmission cavity, a push block is provided at the upper end of the contact push rod, and a tension spring movably sleeved on the outer surface of the contact push rod is provided between the push block and the bottom wall of the transmission cavity.

[0011] The present invention is further configured as follows: two pushing grooves are provided on both sides of the rotating plate, a pushing slide rod is provided on the side of the pushing block close to the rotating plate, the pushing slide rod extends into the pushing groove at one end away from the pushing block and slides in the pushing groove, the upper end of the connecting rod slides through the transmission cavity, and a pushing slide rod sliding in the pushing groove is also provided on the outer surface of the pushing groove close to the other side of the connecting rod, and the lever shaft is provided on the side of the rotating plate close to the fan blade.

[0012] The advantages of the present invention are: First, the present invention can complement and coordinate the power generation of the energy unit, photovoltaic components and wind power generation components according to the different needs of the load unit, thereby avoiding the problem of excessive power generation resulting in waste and insufficient power generation affecting the normal use of the load unit.

[0013] Secondly, the present invention extracts heat from the shell, causing the shell to be in a negative pressure state, so that external air enters the shell through the ventilation holes, thereby achieving the purpose of heat exchange for the electronic components inside the shell, and avoiding the high temperature operation of the inverter when in use, thereby further improving the service life of the inverter.

[0014] Third, the present invention pushes the movable plate upward or downward through the connecting rod, so that the cleaning brush brushes back and forth on the surface of the filter, so that the dust attached to the surface of the filter is brushed off, thereby achieving the purpose of cleaning the surface of the filter, and avoiding as much as possible the excessive dust attached to the surface of the filter that affects the air permeability of the filter, further ensuring the heat dissipation effect of the variable network inverter.

[0015] Fourthly, the present invention arranges the ventilation hole on the side close to the shell into a trumpet shape, so that the airflow is gathered on the side close to the shell, thus ensuring the pushing effect of the airflow on the fan blades.

[0016] Fifth, the present invention adopts a simple mechanical structure to convert the airflow and control the upward or downward displacement of the cleaning brush without the need for additional electric components, so that the device has good environmental value and environmental significance.

[0017] Sixth, the present invention arranges the lever shaft on the side of the rotating plate close to the fan blade, thereby making the force arm on the side of the rotating plate close to the pushing block shorter. In this way, the smaller distance on the side of the rotating plate close to the pushing block can enable the rotating plate to push the connecting rod to move a longer distance, further improving the cleaning range of the cleaning brush on the filter surface and ensuring the cleaning effect of the filter surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a block diagram of a multi-energy complementary energy storage system of the present invention; Figure 2 This is a flow chart of the multi-energy complementary energy storage system of the present invention; Figure 3 Schematic diagram of the structure of the grid-changing inverter of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 It is a partial cross-sectional schematic diagram of the ventilation plate of the present invention; Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0019] In the figure: 1. Cloud control module; 2. Load unit; 3. Grid inverter; 4. Energy generation unit; 5. Battery; 6. Wind-solar hybrid off-grid controller; 7. Photovoltaic module; 8. Wind power generation module; 31. Housing; 32. Ventilation plate; 33. Ventilation hole; 34. Inclined slot; 35. Cooling fan; 36. Filter; 37. Movable plate; 38. Cleaning brush; 39. Connecting rod; 310. Transmission chamber; 311. Rotating shaft; 312. Fan blades; 313. Cam; 314. Contact push rod; 315. Lever shaft; 316. Rotating plate; 317. Push block; 318. Tension spring; 319. Push slide; 320. Push slide rod. DETAILED DESCRIPTION

[0020] See also Figure 1-6 , the present invention provides the following technical solutions: Specifically, it refers to a multi-energy complementary energy storage system, including a cloud control module 1, a load unit 2, a grid-connected inverter 3, an energy generating unit 4, a battery 5, a wind-solar complementary off-grid controller 6, a photovoltaic component 7 and a wind power generation component 8, wherein the load unit 2 refers to an electrical equipment, the energy generating unit 4 is a power generation equipment such as a diesel generator, the wind power generation component 8 and the photovoltaic component 7 are both electrically connected to the wind-solar complementary off-grid controller 6, the wind-solar complementary off-grid controller 6 is electrically connected to the battery 5, and the energy generating unit 4 is electrically connected to the battery 5, so that when in use, the battery 5 can store the electric energy generated by the energy generating unit 4, the wind power generation component 8 and the photovoltaic component 7, the battery 5 is electrically connected to the grid-connected inverter 3, the grid-connected inverter 3 is electrically connected to the load unit 2, and the cloud control module 1 is respectively connected to the wind-solar complementary off-grid controller 6 and the load unit 2 data.

[0021] The specific steps for using the multi-energy complementary energy storage system are as follows: S1. Cloud control module 1 obtains the power target value Pt required by load unit 2 and calculates the maximum power generation value Pm of power generation unit 4, photovoltaic module 7 and wind power generation module 8, the maximum charge power Pc of battery 5, and the maximum discharge power Pf; S2. Determine whether the maximum power generation value Pm of wind, solar, and generator energy is greater than the power target value Pt required by load unit 2. If Pm is not greater than Pt, generate power at the maximum output power Pm. Simultaneously calculate whether Pf is greater than Pt-Pm. If not, discharge battery 5 at the power Pf. S2-1, when Pf is greater than Pt-Pm, the battery 5 discharges at the power of Pt-Pm; S3. When it is calculated that Pm is greater than Pt, calculate whether Pc is greater than Pm-Pt. If so, the battery 5 is charged at the power of Pm-Pt, and the energy generating unit 4, the photovoltaic module 7 and the wind power generation module 8 generate electricity as a whole at the maximum output power Pm; S3-1. When Pc is less than Pm-Pt, the battery 5 is charged with Pc, and the overall output power of the energy generating unit 4, the photovoltaic component 7 and the wind power generation component 8 is limited to Pt+Pc.

[0022] According to the above steps, the power generation power of the energy generating unit 4, the photovoltaic component 7 and the wind power generation component 8 can be complementary and coordinated according to the different needs of the load unit 2, so as to avoid the problem of excessive power generation resulting in waste and insufficient power generation affecting the normal use of the load unit 2.

[0023] Furthermore, the grid-changing inverter 3 includes a shell 31, and a ventilation plate 32 is provided on the side of the shell 13. The ventilation plate 32 is provided with a plurality of ventilation holes 33 that are all connected to the interior of the shell 31, so that external air can enter the shell 31 through the ventilation holes 33. A heat dissipation fan 35 for extracting heat from the inside of the shell 31 is provided on the side of the shell 31 away from the ventilation plate 32. When in use, the heat dissipation fan 35 is started, and the heat dissipation fan 35 extracts the heat from the shell 31, so that the shell 31 is in a negative pressure state, so that external air enters the shell 31 through the ventilation holes 33, thereby achieving the purpose of heat exchange for the electronic components inside the shell 31, and trying to avoid the grid-changing inverter 3 from running at high temperature inside when in use, further improving the service life of the grid-changing inverter 3.

[0024] Furthermore, a filter 36 for blocking dust is provided in the ventilation hole 33. When external dust enters the shell 31 through the ventilation hole 33, the filter 36 blocks the dust in the air, thereby preventing the dust from entering the shell 31 with the air flow and adhering to the electronic components, further ensuring the cleanliness of the inside of the variable grid inverter 3.

[0025] Furthermore, a movable plate 37 is provided on the side of the filter 36 away from the housing 31, and a cleaning brush 38 in contact with the filter 36 is provided on the side of the movable plate 37 close to the filter 36. A connecting rod 39 is provided on the movable plate 37 to control the up and down displacement of the movable plate 37. When in use, the connecting rod 39 pushes the movable plate 37 to move upward or downward, so that the cleaning brush 38 brushes back and forth on the surface of the filter 36, so that dust attached to the surface of the filter 36 is brushed off, thereby achieving the purpose of cleaning the surface of the filter 36, avoiding as much as possible the excessive dust attached to the surface of the filter 36 affecting the air permeability of the filter 36, and further ensuring the heat dissipation effect of the variable network inverter 3.

[0026] Furthermore, a rotating shaft 311 is rotatably connected to the inner wall of the side of the ventilation hole 33 close to the shell 31, and the outer surface of the rotating shaft 311 is sleeved with fan blades 312, and the outer surface of the rotating shaft 311 is sleeved with a cam 313. When the air flow flows into the shell 31 through the ventilation hole 33, the air flow will form a thrust on the blades of the fan blades 312, so that the fan blades 312 synchronously drive the rotating shaft 311 to rotate.

[0027] Furthermore, the side of the ventilation hole 33 close to the shell 31 is trumpet-shaped. Therefore, when the air flow flows into the shell 31 through the ventilation hole 33, since the side of the ventilation hole 33 close to the shell 31 is trumpet-shaped, the air flow gathers on the side of the ventilation hole 33 close to the shell 31, thereby ensuring the pushing effect of the air flow on the blades 312.

[0028] Furthermore, a plurality of transmission chambers 310 are provided in the ventilation plate 32. The transmission chamber 310 is located on the upper side of the ventilation hole 33. A lever shaft 315 is rotatably connected between the inner walls of the opposite sides of the transmission chamber 310. A rotating plate 316 is sleeved on the outer surface of the lever shaft 315. A contact push rod 314 is provided on the outer surface of the cam 313. The lower end of the contact push rod 314 is hemispherical and contacts the outer surface of the cam 313. The upper end of the contact push rod 314 slides through the transmission chamber 310. A push block 317 is provided on the upper end of the contact push rod 314. The push block 317 is in contact with the transmission chamber 310. A tension spring 318 is provided between the bottom walls of the cavity 310 and is movably sleeved on the outer surface of the contact push rod 314. When the tension spring 318 is not affected by the tension force, the tension spring 318 pulls the push block 317 so that the push block 317 is close to the side of the bottom wall of the transmission cavity 310. When the rotating shaft 311 rotates, the cam 313 rotates synchronously with the rotating shaft 311. When the end of the cam 313 rotates to the protruding part, the cam 313 will generate a thrust on the contact push rod 314, causing the contact push rod 314 to move upward, and at the same time, the push block 317 moves upward synchronously, and the tension spring 318 is stressed and stretched.

[0029] Furthermore, two pushing grooves 319 are provided on both sides of the rotating plate 316, and a pushing slide bar 320 is provided on the side of the pushing block 317 close to the rotating plate 316. The pushing slide bar 320 extends into the pushing groove 319 at one end away from the pushing block 317 and slides in the pushing groove 319. Therefore, when the pushing block 317 moves upward, the pushing slide bar 320 can drive the rotating plate 316 to rotate, and at the same time, the pushing slide bar 320 slides in the pushing groove 319. The upper end of the connecting rod 39 slides through the transmission cavity 310. The outer surface of the pushing groove 319 close to the other side of the connecting rod 39 is also provided with a pushing slide bar 320 that slides in the pushing groove 319. When the pushing block 317 pushes When the rotating plate 316 rotates upward, the other side of the rotating plate 316 pushes the connecting rod 39 to move downward, and the movable plate 37 moves downward synchronously with the connecting rod 39. When the protruding part of the cam 313 rotates to the end, the cam 313 no longer generates a thrust on the contact push rod 314, thereby pushing the block 317 downward under the pull of the tension spring 318, so that the other side of the rotating plate 316 pulls the connecting rod 39 to move upward, so that the movable plate 37 moves upward with the connecting rod 39. Through the above structure, a simple mechanical structure is used to convert the airflow and control the upward or downward displacement of the cleaning brush 38 without the need for additional electric components, so that the device has good environmental value and environmental significance.

[0030] Furthermore, the lever shaft 315 is arranged on the side of the rotating plate 316 close to the fan blade 312, so that the force arm on the side of the rotating plate 316 close to the pushing block 317 is shorter. In this way, the smaller distance on the side of the rotating plate 316 close to the pushing block 317 can enable the rotating plate 316 to push the connecting rod 39 to move a longer distance, further improving the cleaning range of the cleaning brush 38 on the surface of the filter 36, and ensuring the cleaning effect of the surface of the filter 36.

[0031] Furthermore, a chute 34 extending out of the outer surface of the ventilation plate 32 is provided on the side of the bottom wall of the ventilation hole 33 away from the shell 31, so that the dust scraped off by the cleaning brush 38 falls on the chute 34, and the dust can slide out of the ventilation plate 32 along the chute 34.

[0032] The multi-energy complementary energy storage system provided by the present invention works as follows: First, the heat dissipation fan 35 is started, and the heat dissipation fan 35 extracts heat from the housing 31, causing the housing 31 to be in a negative pressure state, so that external air enters the housing 31 through the ventilation holes 33, and the filter 36 blocks dust in the air; Step 2: When air flows into the housing 31 through the ventilation holes 33, the airflow generates thrust on the blades 312, thereby synchronously driving the rotation shaft 311 to rotate. The cam 313 rotates synchronously with the rotation shaft 311. When the end of the cam 313 rotates to the protruding portion, the cam 313 generates thrust on the contact push rod 314, causing the contact push rod 314 to move upward. At the same time, the push block 317 moves upward synchronously, and the tension spring 318 is stressed and stretched. Step 3: When the push block 317 pushes the rotating plate 316 to rotate upward, the other side of the rotating plate 316 pushes the connecting rod 39 to move downward. At the same time, the movable plate 37 moves downward synchronously with the connecting rod 39, so that the cleaning brush 38 moves downward on the surface of the filter 36. In the fourth step, when the protruding part of the cam 313 rotates to the end, the cam 313 no longer generates a thrust on the contact push rod 314, so that the push block 317 moves downward under the pull of the tension spring 318, so that the other side of the rotating plate 316 pulls the connecting rod 39 to move upward, so that the movable plate 37 moves upward with the connecting rod 39, and the cleaning brush 38 moves upward on the surface of the filter 36.

Claims

1. A multi-energy complementary energy storage system, comprising a cloud control module (1), a load unit (2), a grid-changing inverter (3), an energy generating unit (4), a storage battery (5), a wind-solar complementary off-grid controller (6), a photovoltaic module (7) and a wind power generation module (8), characterized in that: The wind power generation component (8) and the photovoltaic component (7) are both electrically connected to the wind-solar hybrid off-grid controller (6), the wind-solar hybrid off-grid controller (6) is electrically connected to the storage battery (5), the energy generation unit (4) is electrically connected to the storage battery (5), the storage battery (5) can store the electric energy generated by the energy generation unit (4), the wind power generation component (8) and the photovoltaic component (7), the storage battery (5) is electrically connected to the grid-changing inverter (3), the grid-changing inverter (3) is electrically connected to the load unit (2), and the cloud control module (1) is respectively connected to the wind-solar hybrid off-grid controller (6) and the load unit (2) for data.

2. A multi-energy complementary energy storage system according to claim 1, characterized in that: The grid-changing inverter (3) comprises a housing (31), a ventilation plate (32) being arranged on the side of the housing (13), a plurality of ventilation holes (33) being arranged on the ventilation plate (32) and being connected to the interior of the housing (31), and a heat dissipation fan (35) for extracting heat from the interior of the housing (31) being arranged on a side of the housing (31) away from the ventilation plate (32).

3. A multi-energy complementary energy storage system according to claim 2, characterized in that: A filter screen (36) for blocking dust is arranged in the ventilation hole (33), and an inclined groove (34) extending out of the outer surface of the ventilation plate (32) is provided on a side of the bottom wall of the ventilation hole (33) away from the shell (31).

4. A multi-energy complementary energy storage system according to claim 3, characterized in that: A movable plate (37) is provided on a side of the filter (36) away from the housing (31), a cleaning brush (38) in contact with the filter (36) is provided on a side of the movable plate (37) close to the filter (36), and a connecting rod (39) for controlling the upward and downward displacement of the movable plate (37) is provided on the movable plate (37).

5. A multi-energy complementary energy storage system according to claim 4, characterized in that: A rotating shaft (311) is rotatably connected to the inner wall of one side of the ventilation hole (33) close to the shell (31), a fan blade (312) is sleeved on the outer surface of the rotating shaft (311), a cam (313) is sleeved on the outer surface of the rotating shaft (311), a plurality of transmission chambers (310) are opened in the ventilation plate (32), the transmission chamber (310) is located on the upper side of the ventilation hole (33), a lever shaft (315) is rotatably connected between the inner walls on two opposite sides of the transmission chamber (310), a rotating plate (316) is sleeved on the outer surface of the lever shaft (315), and a contact push rod (314) is provided on the outer surface of the cam (313), the lower end of the contact push rod (314) is hemispherical and contacts the outer surface of the cam (313).

6. A multi-energy complementary energy storage system according to claim 5, characterized in that: The ventilation hole (33) is in a trumpet shape on a side close to the housing (31).

7. A multi-energy complementary energy storage system according to claim 5, characterized in that: The upper end of the contact push rod (314) slides into the transmission chamber (310), a push block (317) is provided at the upper end of the contact push rod (314), and a tension spring (318) movably sleeved on the outer surface of the contact push rod (314) is provided between the push block (317) and the bottom wall of the transmission chamber (310).

8. A multi-energy complementary energy storage system according to claim 7, characterized in that: Two push slide grooves (319) are provided on both sides of the rotating plate (316), and a push slide rod (320) is provided on one side of the push block (317) close to the rotating plate (316). One end of the push slide rod (320) away from the push block (317) extends into the push slide groove (319) and slides in the push slide groove (319). The upper end of the connecting rod (39) slides through the transmission cavity (310), and a push slide rod (320) sliding in the push slide groove (319) is also provided on the outer surface of the push slide groove (319) close to the other side of the connecting rod (39).

9. A multi-energy complementary energy storage system according to claim 8, characterized in that: The lever shaft (315) is arranged on a side of the rotating plate (316) close to the fan blade (312).

10. A method for operating a multi-energy complementary energy storage system, based on the multi-energy complementary energy storage system according to claim 1, characterized in that: The specific operation steps are as follows: S1, the cloud control module (1) obtains the power target value Pt required by the load unit (2), and calculates the maximum power generation value Pm of the energy generation unit (4), the photovoltaic component (7) and the wind power generation component (8), the maximum chargeable power Pc of the battery (5), and the maximum dischargeable power Pf; S2, judging whether the maximum power value Pm of wind, solar and power generation is greater than the power target value Pt required by the load unit (2); when Pm is not greater than Pt, generating electricity according to the maximum output power Pm, and calculating whether Pf is greater than Pt-Pm; when not greater than Pf, discharging the storage battery (5) at the power of Pf; S2-1, when Pf is greater than Pt-Pm, the battery (5) discharges at the power of Pt-Pm; S3, when it is calculated that Pm is greater than Pt, it is calculated whether Pc is greater than Pm-Pt. If so, the storage battery (5) is charged with the power of Pm-Pt, and the energy generating unit (4), the photovoltaic component (7) and the wind power generating component (8) generate electricity as a whole at the maximum output power Pm; S3-1. When Pc is less than Pm-Pt, the storage battery (5) is charged with Pc, and the overall output power of the energy generating unit (4), the photovoltaic component (7) and the wind power generation component (8) is limited to Pt+Pc.

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