A microgrid power supply system for a distribution station

Abstract

The present invention discloses a microgrid power supply system of a power distribution station, comprising an inverter, a solar panel and a battery pack composed of a plurality of batteries, wherein the inverter is provided with a battery panel interface electrically connected to the solar panel, and the inverter is provided with a positive and negative electrode interface electrically connected to the battery pack, and the inverter is also provided with a mains input interface and a power output interface, and the device can perform interval charging operation when the solar panel charges the battery through a joint protection mechanism, so as to avoid the situation that the service life of the battery is reduced due to long-term overcharging; at the same time, the battery protection mechanism can be used to quickly disconnect the charging interface and quickly provide battery damage information when the battery is overcharged and heated or long-term use causes internal short circuit expansion, so as to realize further protection and maintenance of the battery.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of power distribution stations, and in particular to a microgrid power supply system of a power distribution station. Background Art

[0002] A distribution station is a power distribution station. Its task is to deliver electricity to electrical equipment or users. That is, it can receive, distribute, control and protect electrical energy during use, but it does not transform the electrical energy. In order to achieve the purposes of distribution and control, it is necessary to use multiple switches and other components, and it is also necessary to use switch cabinets to install switches and other components. When the distribution station is in use, once the city power is disconnected and the electrical equipment or users cannot be powered on, they can only rely on the microgrid power supply system for power supply. The microgrid power supply system is also translated as a microgrid power supply system, which refers to a small-scale power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices, etc. There are many energy conversion devices used by the microgrid power supply system when in use, such as wind power conversion or solar energy-electricity conversion, among which solar energy-electricity conversion is more common.

[0003] However, the common solar energy-electricity conversion in the market currently requires the use of solar panels and inverters to normally convert solar energy into electrical energy, and then import the electrical energy into batteries. The solar panels and inverters are often connected by power cables, and the existing power cables cannot perform overcharge or battery short circuit protection operations during the process of importing electrical energy into batteries. Because if the existing batteries continue to be charged after being fully charged, it is very easy to cause the internal pressure of the battery to increase or cause the battery to swell and heat up, thereby reducing the service life of the battery. Summary of the invention

[0004] To this end, an embodiment of the present invention provides a microgrid power supply system for a distribution station to solve the problem in the prior art that if the existing batteries in the power supply system continue to be charged after being fully charged, it is very easy to cause the internal pressure of the battery to increase or cause the battery to swell and heat up, thereby reducing the service life of the battery.

[0005] In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0006] A microgrid power supply system for a power distribution station, comprising an inverter, a solar panel and a battery pack consisting of a plurality of batteries, wherein the inverter is provided with a battery panel interface electrically connected to the solar panel, and the inverter is provided with a positive and negative electrode interface electrically connected to the battery pack, and the inverter is also provided with a mains input interface and a power output interface;

[0007] The solar panel includes a mounting frame for mounting the solar panel, a partition cylinder whose end is connected to the mounting frame, and a connection cover installed at the other end of the partition cylinder and connected to the surface of the switch cabinet. The inverter is located in the connection cover and is directly connected to the inner wall of the connection cover. A joint protection mechanism connected to the inverter is installed on the inner wall of the connection cover, and a battery protection mechanism is installed on the surface of the connection cover away from the inverter.

[0008] As a preferred solution of the present invention, the joint protection mechanism includes a contact strip connected to the positive and negative electrode interfaces and a fixed plate installed on the inner wall of the connecting cover, a transfer block group is installed on the surface of one end of the fixed plate close to the contact strip, a battery charging strip with an L-shaped cross-section is installed on the surface of the transfer block group, and an adjusting rod is connected to the transfer block group, and a plurality of connecting columns with an L-shaped structure are installed on the adjusting rod, a pulling frame is connected to the side of the connecting column away from the inverter, a magnetic block is installed on the end of the pulling frame away from the connecting column, and an electromagnetic block frame for attracting the magnetic block is installed on the surface of the end of the fixed plate away from the contact strip.

[0009] As a preferred solution of the present invention, the pulling frame includes a bearing plate installed on the surface of the fixed plate and a sliding pull column arranged through the bearing plate, and an L-shaped connecting column pull strip is installed at one end of the sliding pull column close to the connecting column, and the other end of the sliding pull column is connected to the magnetic block.

[0010] As a preferred solution of the present invention, a push plate is installed on the side wall of the sliding pull column, and a spring block with a U-shaped structure and connected to the push plate is installed on the surface of the bearing plate.

[0011] As a preferred solution of the present invention, the electromagnetic block frame includes a magnetic block mounting block with a U-shaped cross-section and connected to a fixed plate, and an electromagnetic block connected to the magnetic block mounting block, a conductive strip is installed on the inner wall of the magnetic block mounting block, and a timing switch is installed on the magnetic block mounting block.

[0012] As a preferred solution of the present invention, the battery protection mechanism includes an installation bag cover for installing a battery and a bent spring sheet located directly below the installation bag cover and connected to the inner wall of the connecting cover, a fixed card cover is installed on the inner wall of the installation bag cover, a thermal conductive strip is installed on the bottom inner surface of the fixed card cover, an expansion gas cylinder penetrating the installation bag cover is installed on the surface of the thermal conductive strip, the inner wall of the expansion gas cylinder is connected to a movable push column with a T-shaped structure and an end portion penetrating through the surface of the bent spring sheet, and a guide strip connected to the conductive strip is installed on the bent spring sheet.

[0013] As a preferred solution of the present invention, a plurality of push strips are connected to the side wall of the heat conducting strip, and a push strip movable groove is provided on the side wall of the fixed card cover.

[0014] As a preferred solution of the present invention, a heat dissipation column is installed on the inner wall of the expansion cylinder at one end away from the movable push column, and a plurality of heat dissipation strips are installed on the side wall of the heat dissipation column.

[0015] As a preferred solution of the present invention, the push bar is in a U-shaped structure.

[0016] The embodiments of the present invention have the following advantages:

[0017] The invention sets a joint protection mechanism so that when the solar panel charges the battery, the charging operation can be performed at intervals. In the specific operation, it is only necessary to set the charging time of different periods on the time switch. Once the set time is exceeded, the electromagnetic block will start to attract the magnetic block to move with the pulling frame to pull the connecting column to deflect. After that, the connecting column will be separated from the contact strip and the battery charging strip. The operation is simple and convenient. The equipment is not affected by the battery model during maintenance. At the same time, it also realizes the protection operation of cyclic circuit breaking to avoid the situation where the battery service life is reduced due to long-term overcharging.

[0018] Furthermore, the battery protection mechanism can be used to quickly disconnect the charging port when the battery is overcharged and heated or used for a long time to cause internal short circuit and expansion, so as to further protect the battery. In specific operation, if the battery generates high temperature due to heat or the battery short circuit causes expansion, the high temperature will cause the gas in the expansion cylinder to expand and push the bent spring piece to activate the electromagnetic block to achieve circuit breaking protection. At the same time, the expanded battery will push the push bar to squeeze the installation bag cover, so that the user can replace the damaged battery immediately. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 A circuit diagram of a microgrid power supply system according to an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 3 A top view of an adjustment rod according to an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a front cross-sectional structure of a battery protection mechanism according to an embodiment of the present invention;

[0025] Figure 5 Schematic diagram of the joint protection mechanism according to an embodiment of the present invention.

[0026] In the figure:

[0027] 1-Solar panel; 2-Inverter; 3-Battery; 4-Connector protection mechanism; 5-Battery protection mechanism;

[0028] 101-mounting frame; 102-separation cylinder; 103-connection cover;

[0029] 401-contact strip; 402-fixed plate; 403-rotating block group; 404-battery charging strip; 405-adjusting rod; 406-connecting column; 407-pulling frame; 408-magnetic block; 409-electromagnetic block frame; 410-carrying plate; 411-sliding pull column; 412-column pull strip; 413-pushing plate; 414-spring block; 415-magnetic block mounting block; 416-electromagnetic block; 417-conductive strip; 418-timing switch;

[0030] 501-install the bag cover; 502-bend the spring sheet; 503-fix the card cover; 504-heat-conducting strip; 505-expansion cylinder; 506-movable push column; 507-guide strip; 508-push bar; 509-movable push bar groove; 510-heat-dissipating column; 511-heat-dissipating strip. DETAILED DESCRIPTION

[0031] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1As shown, this embodiment provides a microgrid power supply system for a distribution station, which uses a connector protection mechanism 4 to enable the solar panel 1 to perform intermittent charging operations when charging the battery, so as to avoid the situation where the battery service life is reduced due to long-term overcharging; at the same time, the battery protection mechanism 5 can also be used to quickly disconnect the charging interface when the battery is overcharged and heated, so as to achieve further protection of the battery.

[0033] like Figure 1 As shown, it includes an inverter 2, a solar panel 1 and a battery pack composed of a plurality of batteries 3. The inverter 2 can select a common solar inverter (specifically an inverter / charger integrated machine) on the market, which can convert the direct current generated by the solar panel into alternating current used by household appliances. In order to make the current converted by the inverter 2 more stable, a current stabilizer can be installed between the solar panel 1 and the inverter 2. The solar panel 1 can be specifically composed of three or more panels connected in series, and the battery pack is also composed of a plurality of batteries 3 connected in series. The specific circuit connection can be as follows: Figure 1 shown.

[0034] The inverter 2 is provided with a panel interface electrically connected to the solar panel 1. The panel interface consists of two and is respectively connected to the positive and negative poles of the solar panel 1. At this time, the electricity converted by the solar panel 1 will be introduced into the panel interface through the power line, thereby being introduced into the inverter 2, and the battery pack is charged through the inverter 2. The inverter 2 is provided with a positive and negative electrode interface electrically connected to the battery pack. The positive and negative electrode interface consists of a +48V positive input port and a 0V negative input port, and the two input ports are respectively connected to the positive and negative poles of the battery pack for use by electrical appliances or users. The inverter 2 is also provided with a mains input interface and a power output interface, and the power output interface can be set to a DC48V output port and an AC220V output port.

[0035] The operation process of the microgrid power supply system is as follows: after the solar panel 1 performs photoelectric conversion, it will first be introduced into the inverter 2 through the solar panel interface, and then the electricity entering the inverter 2 will enter the battery pack through the positive and negative electrode interfaces for storage. When the city power is cut off, the battery pack will output electricity to the electrical appliances (at this time, the inverter 2 can play a role in converting direct current into alternating current used by household appliances).

[0036] like Figure 2 As shown, the solar panel 1 includes a mounting frame 101 for mounting the panel (the panel is a common solar panel on the market, and there are multiple panels, and the multiple panels are connected in series, and the connection lines can be as shown in FIG. Figure 1As shown in FIG. 1 ), a separation cylinder 102 connected to the mounting frame 101 at one end (a current stabilizer can be installed in the separation cylinder 102 to make the current converted by the inverter 2 more stable) and a connection cover 103 installed at the other end of the separation cylinder 102 and connected to the surface of the switch cabinet. The structure of the connection cover 103 can be as shown in FIG. Figure 1 As shown, one side is open and connected to the surface of the electrical cabinet, the inverter 2 is located in the connection cover 103 and is directly connected to the inner wall of the connection cover 103, a connector protection mechanism 4 connected to the inverter 2 is installed on the inner wall of the connection cover 103, and a battery protection mechanism 5 is installed on the surface of the connection cover 103 away from the inverter 2.

[0037] When the solar panel 1 is in use, light energy can be directly converted into electrical energy through the solar panel, and then introduced into the battery pack through the inverter 2. The power introduced into the battery pack can be protected by the connector protection mechanism 4 and the battery protection mechanism 5, so that when the solar panel 1 charges the battery, intermittent charging operations can be performed to avoid the situation where the battery service life is reduced due to long-term overcharging; at the same time, when the battery is overcharged and heated or used for a long time to cause internal short circuit and expansion, the charging interface can be quickly disconnected to achieve further protection of the battery.

[0038] like Figure 2 , Figure 3 and Figure 5 As shown, the joint protection mechanism 4 includes a contact strip 401 connected to the positive and negative electrode interfaces, and the main structure of the contact strip 401 is a copper platform, such as Figure 5 As shown, copper columns are installed on the copper platform bar. When the contact bar 401 is connected to the positive and negative electrode interfaces, it can be connected through the power line, that is, the copper column on the contact bar 401 can be connected to one end of the power line, and the other end of the power line is connected to the positive and negative poles of the corresponding positive and negative electrode interfaces (that is, connected to the +48V positive input port and the 0V negative input port). At this time, the electricity converted by the solar panel 1 is directly introduced into the inverter 2 through the power line, and then the inverter 2 will transmit the electricity to the contact bar 401. If the battery is charged, it is necessary to use the joint protection mechanism 4 to achieve it, instead of directly connecting the power line, and the fixing plate 402 installed on the inner wall of the connection cover 103.

[0039] One end surface of the fixed plate 402 close to the contact strip 401 is provided with a rotating block group 403. A battery charging strip 404 with an L-shaped cross-section is mounted on the surface of the rotating block group 403. The battery charging strip 404 is respectively connected to the +48V positive input port and the 0V negative input port. An adjusting rod 405 is connected to the rotating block group 403. The adjusting rod 405 is mainly composed of a plurality of rotating columns and arc-shaped mounting blocks located between adjacent rotating columns. This is set to facilitate the installation of the connecting column 406. The number of the connecting columns 406 can be set to two. One of them can be connected to the +48V positive input port, and the other can be connected to the negative input port. A plurality of L-shaped connecting columns 406 are mounted on the adjusting rod 405. One side of the connecting column 406 away from the inverter 2 is connected to a pulling frame 407. A magnetic block 408 is mounted at one end of the pulling frame 407 away from the connecting column 406. An electromagnet block frame 409 for attracting the magnetic block 408 is mounted on the surface of the fixed plate 402 away from the contact strip 401.

[0040] When the joint protection mechanism 4 is in normal use, the pulling frame 407 pushes the connecting column 406, so that both ends of the connecting column 406 are respectively connected to the contact strip 401 and the battery charging strip 404. At this time, the inverter 2 can input electricity into the battery charging strip 404 through the connecting column 406, enabling the battery pack to perform a charging operation. Since the electromagnet block frame 409 includes a magnet mounting block 415 with a U-shaped cross-section and connected to the fixed plate 402 and an electromagnet block 416 connected to the magnet mounting block 415, and a timing switch 418 is mounted on the magnet mounting block 415. The timing switch 418 can be an electronic timing switch, which can control the electromagnet block frame 409 in a multi-periodic manner with a cycle of days or weeks. Therefore, when the user sets the timing switch 418, once the charging time of the battery pack reaches the set time, the electromagnet block 416 will be activated to generate a magnetic force and attract the magnetic block 408 to move, causing it to drive the pulling frame 407 to move towards the magnet mounting block 415.

[0041] Such as Figure 2 、 Figure 3 and Figure 5As shown, the pulling frame 407 includes a bearing plate 410 installed on the surface of the fixed plate 402 (the bearing plate 410 is used to carry the sliding pull column 411, so that the sliding pull column 411 can only slide left and right along the bearing plate 410) and a sliding pull column 411 that is arranged on the bearing plate 410. The end of the sliding pull column 411 close to the connecting column 406 is installed with a connecting column pull bar 412 with an L-shaped structure, and the other end of the sliding pull column 411 is connected to the magnetic block 408. Therefore, once the magnetic block 408 is attracted, it will move with the sliding pull column 411 toward the magnetic block mounting block 415. At this time, the movable sliding pull column 411 will pull the connecting column pull bar 412 and the connecting column 406 to move together, and when the connecting column 406 is forced to move, it will deflect around the adjustment rod 405. After that, the two ends of the connecting column 406 will simultaneously separate from the contact bar 401 and the battery charging bar 404, thereby realizing the circuit breaker protection operation. After that, once the circuit breaker time reaches the set value, the charging operation will be performed again. Such a cycle can avoid the situation where the battery service life is reduced due to long-term overcharging. At the same time, the whole operation process is simple and convenient, and the equipment will not be affected by the battery model during maintenance.

[0042] like Figure 2 , Figure 3 and Figure 5 As shown, a push plate 413 is installed on the side wall of the sliding pull column 411, and a spring block 414 with a U-shaped structure and connected to the push plate 413 is installed on the surface of the supporting plate 410. When the electromagnetic block 416 is activated, the push plate 413 will move toward the magnetic block mounting block 415 together with the sliding pull column 41. At this time, the spring block 414 will be compressed. Once the electromagnetic block 416 is turned off, the spring block 414 will reset, so that the two ends of the connecting column 406 are connected to the contact bar 401 and the battery charging bar 404 at the same time.

[0043] like Figure 2 and Figure 4 As shown, the battery protection mechanism 5 includes an installation bag cover 501 for installing the battery 3 and a curved spring piece 502 located directly below the installation bag cover 501 and connected to the inner wall of the connecting cover 103. The installation bag cover 501 can play a certain heat insulation role so that the external environment will not affect the battery (that is, it can be filled with heat insulation material and shock-absorbing material (the shock-absorbing material is close to the battery, and gas or sponge can be selected)). The existence of the curved spring piece 502 is to make the relationship between the battery protection mechanism 5 and the connector protection mechanism 4 closer. The curved spring piece 502 can be regarded as an operating mechanism, and the installation bag cover 501 and the mechanism located in the installation bag cover 501 can be regarded as a detection device. Once the detection device detects that the battery has a fault, the circuit breaker protection operation can be immediately performed through the operating mechanism.

[0044] A fixed clamping cover 503 is installed on the inner wall of the installation bladder 501. A heat conducting strip 504 is installed on the inner surface of the bottom of the fixed clamping cover 503. An expansion air cylinder 505 penetrating the installation bladder 501 is installed on the surface of the heat conducting strip 504. A gas with a relatively large expansion rate (multiple numbers can be set) can be filled into the expansion air cylinder 505, such as hydrogen, as long as it can meet the purpose of expanding when heated. The bending elastic piece 502 can be a elastic piece with a relatively large deformation amount. At the same time, the bending elastic piece 502 and the guiding strip 507 are insulated from each other. The inner wall of the expansion air cylinder 505 is connected with a movable push column 506 in a T-shaped structure and the end of which penetrates to the surface of the bending elastic piece 502. A guiding strip 507 connected to the conductive strip 417 is installed on the bending elastic piece 502.

[0045] The battery protection mechanism 5 can perform over-temperature protection on the storage battery. During specific operation, once a large amount of heat is generated due to overcharging of the battery, the heat conducting strip 504 will quickly absorb heat. Then the gas in the expansion air cylinder 505 will quickly expand and gradually push the bending elastic piece 502 (under normal circumstances, the bending elastic piece 502 and the movable push column 506 are closely attached together. And in order to avoid misoperation or automatic disconnection during normal operation, a traction spring can be installed between the movable push column 506 and the bottom end of the expansion air cylinder 505. Only when the temperature rises to a certain height, at this time the expansion degree of the gas is relatively large, overcoming the resistance of the bending elastic piece 502 itself and the pulling force of the traction spring, can the protection operation be carried out).

[0046] And because a conductive strip 417 is installed on the inner wall of the magnet mounting block 415, the bent bending elastic piece 502 will then gradually connect the guiding strip 507 with the conductive strip 417. Then the electromagnetic block 416 will be activated. The conductive strip 417 and the timing switch 418 are both connected to the electromagnetic block 416, and the two can be connected in parallel to the electromagnetic block 416. And the power source for supplying power to the two can be selected as a storage battery or the like.

[0047] A plurality of pushing strips 508 are connected to the side wall of the heat conducting strip 504. The pushing strips 508 are in a U-shaped structure. The reason for setting it in a U-shaped structure is to provide a fixed protection for the battery pack, so that the battery pack cannot be easily taken out. A push strip activity groove 509 is opened on the side wall of the fixed clamping cover 503. When the battery expands due to internal short circuit, the pushing strips 508 will be pushed by the protruding outer wall of the battery and then slide into the push strip activity groove 509, and squeeze the installation bladder 501, making it generate a certain amount of deformation, which is convenient for the user to directly see the damage condition of the battery and provides convenience for subsequent maintenance.

[0048] A heat dissipation column 510 is installed on the inner wall of the expansion cylinder 505 at one end away from the movable push column 506, and a plurality of heat dissipation strips 511 are installed on the side wall of the heat dissipation column 510. The heat dissipation column 510 and the heat dissipation strips 511 are provided to increase the degree of heat diffusion in the expansion cylinder 505 so that the expansion rate of the gas is faster, that is, the circuit breaker protection operation is faster when overheating occurs.

[0049] Here, technical vocabulary is used only for the purpose of describing specific example embodiments and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" used herein may be intended to include the plural forms as well. The terms "comprises", "comprising", "including", and "having" are inclusive, and thus specify the presence of the claimed features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or additional presence of one or more other features, wholes, steps, operations, elements, components, and / or combinations thereof. Unless the order of execution is explicitly indicated, the method steps, processing, and operations described herein are not interpreted as necessarily needing to be performed in the specific order discussed and shown. It should also be understood that additional or optional steps may be adopted.

[0050] When an element or layer is referred to as being "on ...", "engaged with ...", "connected to" or "coupled to" another element or layer, it may be directly on another element or layer, engaged with another element or layer, connected to or coupled to another element or layer, or there may be an intervening element or layer. In contrast, when an element or layer is referred to as being "directly on ...", "directly engaged with ...", "directly connected to" or "directly coupled to" another element or layer, there may be no intervening element or layer. Other words used to describe element relationships should be interpreted in a similar manner (e.g., "between ..." and "directly between ...", "adjacent" and "directly adjacent", etc.). The term "and / or" used herein includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts are not limited by these terms. These terms may only be used to distinguish one element, component, region or part from another element, component, region or part. Unless clearly indicated by the context, the use of terms such as "first", "second" and other numerical terms herein does not imply sequence or order. Therefore, the first element, component, region, layer or part discussed below can adopt the terminology of the second element, component, region, layer or part without departing from the teaching of the exemplary embodiment.

[0051] Spatially relative terms, such as "inside", "outside", "below", "below...", "lower", "above", "upper", etc., may be used herein for ease of description to describe the relationship between one element or feature and one or more other elements or features as shown in the figure. Spatially relative terms may be meant to include different orientations of the device in addition to the orientation depicted in the figure. For example, if the device in the figure is flipped, the elements described as "below other elements or features" or "below elements or features" will be oriented as "above other elements or features". Therefore, the example term "below..." may include both upward and downward orientations. The device can be oriented in other ways (rotated 90 degrees or other orientations) and interpreted with the spatially relative descriptions herein.

[0052] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A microgrid power supply system for a distribution station, characterized in that: The invention comprises an inverter (2), a solar panel (1) and a battery pack composed of a plurality of batteries (3), wherein the inverter (2) is provided with a battery panel interface electrically connected to the solar panel (1), and the inverter (2) is provided with a positive and negative electrode interface electrically connected to the battery pack, and the inverter (2) is also provided with a mains power input interface and a power output interface; The solar panel (1) comprises a mounting frame (101) for mounting the solar panel, a partition cylinder (102) whose end is connected to the mounting frame (101), and a connection cover (103) installed at the other end of the partition cylinder (102) and connected to the surface of the switch cabinet, the inverter (2) is located in the connection cover (103) and is directly connected to the inner wall of the connection cover (103), a joint protection mechanism (4) connected to the inverter (2) is installed on the inner wall of the connection cover (103), and a battery protection mechanism (5) is installed on the surface of the connection cover (103) on one side away from the inverter (2); The joint protection mechanism (4) comprises a contact strip (401) connected to the positive and negative electrode interfaces and a fixing plate (402) installed on the inner wall of the connection cover (103); a rotating block group (403) is installed on the surface of one end of the fixing plate (402) close to the contact strip (401); a battery charging strip (404) with an L-shaped cross section is installed on the surface of the rotating block group (403); an adjusting rod (405) is connected to the rotating block group (403); a plurality of connecting columns (406) with an L-shaped structure are installed on the adjusting rod (405); a pulling frame (407) is connected to the side of the connecting column (406) away from the inverter (2); a magnetic block (408) is installed on the end of the pulling frame (407) away from the connecting column (406); and an electromagnetic block frame (409) for attracting the magnetic block (408) is installed on the surface of one end of the fixing plate (402) away from the contact strip (401); The battery protection mechanism (5) comprises a mounting bag cover (501) for mounting a storage battery (3) and a curved spring sheet (502) located directly below the mounting bag cover (501) and connected to the inner wall of the connection cover (103); a fixed card cover (503) is mounted on the inner wall of the mounting bag cover (501); a heat conducting strip (504) is mounted on the inner surface of the bottom of the fixed card cover (503); an expansion cylinder (505) penetrating the mounting bag cover (501) is mounted on the surface of the heat conducting strip (504); a movable push column (506) having a T-shaped structure and an end portion penetrating the surface of the curved spring sheet (502) is connected to the inner wall of the expansion cylinder (505); and a guide strip (507) connected to the conductive strip (417) is mounted on the curved spring sheet (502).

2. A microgrid power supply system for a distribution station according to claim 1, characterized in that: The pulling frame (407) comprises a bearing plate (410) mounted on the surface of the fixed plate (402) and a sliding pull column (411) penetrating the bearing plate (410); an end of the sliding pull column (411) close to the connecting column (406) is provided with a connecting column strip (412) in an L-shaped structure, and the other end of the sliding pull column (411) is connected to the magnetic block (408).

3. A microgrid power supply system for a distribution station according to claim 2, characterized in that: A push plate (413) is installed on the side wall of the sliding pull column (411), and a spring block (414) having a U-shaped structure and connected to the push plate (413) is installed on the surface of the bearing plate (410).

4. The microgrid power supply system of a distribution station according to claim 1, characterized in that: The electromagnetic block frame (409) comprises a magnetic block mounting block (415) having a U-shaped cross section and connected to the fixing plate (402), and an electromagnetic block (416) connected to the magnetic block mounting block (415); a conductive strip (417) is installed on the inner wall of the magnetic block mounting block (415), and a time switch (418) is installed on the magnetic block mounting block (415).

5. The microgrid power supply system of a distribution station according to claim 1, characterized in that: A plurality of push bars (508) are connected to the side wall of the heat conducting bar (504), and a push bar movable groove (509) is provided on the side wall of the fixed card cover (503).

6. A microgrid power supply system for a distribution station according to claim 1, characterized in that: A heat dissipation column (510) is installed on the inner wall of the expansion cylinder (505) at one end away from the movable push column (506), and a plurality of heat dissipation strips (511) are installed on the side wall of the heat dissipation column (510).

7. A microgrid power supply system for a distribution station according to claim 5, characterized in that: The push bar (508) is in a U-shaped structure.

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