Energy storage converter based on network construction type energy storage

Abstract

The utility model provides an energy storage converter based on net-building type energy storage. The energy storage converter based on net-building type energy storage comprises a box body, a transformer is fixedly installed on the side face of the inner wall of the box body, a storage battery is fixedly installed at the bottom of an inner cavity of the box body, and a mounting plate is fixedly connected to the front face of the inner wall of the box body. According to the energy storage converter based on the network construction type energy storage provided by the utility model, the storage battery is arranged, so that when power is supplied to a load, the transformer can convert high-voltage current into low-voltage direct current and then transmit the low-voltage direct current into the storage battery to be stored, and the storage battery can convert electric energy into chemical energy to be stored; therefore, when the input current of the transformer is cut off due to a power grid fault, the storage battery can continuously convey the current to the interior of the supercapacitor, so that the supercapacitor can continuously discharge for a long time, and the problem that the emergency power supply effect is difficult to achieve due to the fact that the working time is short when the capacitor independently works for discharging is solved. And the practical effect of the converter is improved.

Description

Technical Field

[0001] The utility model relates to the field of converters, in particular to a energy storage converter based on a network-forming energy storage system. Background Art

[0002] A virtual power plant is a concept that can be summarized as "communication" and "aggregation" through advanced information and communication technologies and software systems. The key technologies of a virtual power plant mainly include coordinated control technology, intelligent metering technology, and information and communication technology. Among them, the energy storage converter is one of the more important components in a virtual power plant. Currently, in the related art, three installation cavities are provided in the energy storage converter cabinet to install the various components of the converter. However, the installation method using three installation cavities makes the volume of the converter cabinet extremely large, which will then occupy a relatively large space and is not conducive to the miniaturization of the converter.

[0003] In the existing technology, such as the "energy storage converter" with the Chinese authorization announcement number: CN217362888U, which includes a cabinet body and components. The cabinet body has a first installation cavity and a second installation cavity; the components include a power module and a filter; the power module is arranged in the first installation cavity; the filter is arranged in the second installation cavity, and the first end of the filter is connected to the first end of the power module. By arranging the power module in the first installation cavity and the filter in the second installation cavity, and installing the components in the energy storage converter through two installation cavities, the volume of the energy storage converter cabinet is reduced, thereby avoiding the energy storage converter cabinet occupying a relatively large space and being conducive to the miniaturization of the energy storage converter.

[0004] In the existing technology, when storing electrical energy, due to the poor energy storage effect of the capacitor, when there are faults in the power grid and the input current, it is difficult for the converter to supply power to the load for a long time, which then leads to the problem of poor emergency response of the converter.

[0005] Therefore, it is necessary to provide an energy storage converter based on a network-forming energy storage system to solve the above technical problems. Summary of the Utility Model

[0006] The utility model provides an energy storage converter based on a network-forming energy storage system, which solves the problem that when there are faults in the power grid and the input current, it is difficult for the converter to supply power to the load for a long time due to the poor energy storage effect of the capacitor, which then leads to the problem of poor emergency response of the converter.

[0007] To solve the above technical problems, a power conversion device for energy storage based on a network-forming energy storage provided by the present utility model includes a box body. On the side of the inner wall of the box body, a transformer is fixedly installed. At the bottom of the inner cavity of the box body, a storage battery is fixedly installed. On the front of the inner wall of the box body, a mounting plate is fixedly connected. On the top of the mounting plate, a supercapacitor is fixedly installed. On the side of the box body, an output port is fixedly installed. On the front of the inner wall of the box body, an auxiliary mechanism is provided. On the side of the inner wall of the box body, a heat dissipation mechanism is provided. A filter screen is fixedly sleeved on the side of the box body. At the bottom of the box body, a fixing mechanism is provided. On the front of the box body, a closing mechanism is provided.

[0008] Preferably, the input end of the storage battery is electrically connected to the output end of the transformer, and the number of the storage batteries is three. The three storage batteries are evenly distributed at the bottom of the inner cavity of the box body.

[0009] Preferably, the input end of the supercapacitor is electrically connected to the output end of the storage battery, and the number of the supercapacitors is several.

[0010] Preferably, the auxiliary mechanism includes a support plate. The support plate is fixedly connected to the front of the inner wall of the box body. On the top of the support plate, a booster is fixedly installed. The input end of the booster is electrically connected to the output end of the storage battery.

[0011] Preferably, the heat dissipation mechanism includes a ventilation cover. The ventilation cover is fixedly sleeved on the side of the inner wall of the box body. Inside the ventilation cover, a rotary motor is fixedly installed. On the output shaft of the rotary motor, a fan blade is fixedly sleeved.

[0012] Preferably, the filter screen and the mounting plate are perpendicular to each other, and the material of the filter screen is stainless steel.

[0013] Preferably, the fixing mechanism includes a support frame. The support frame is fixedly connected to the bottom of the box body. Inside the support frame, a bolt is threadedly sleeved.

[0014] Preferably, the closing mechanism includes a closing door. The closing door is movably sleeved on the side of the box body. On the top of the closing door, a magnet block is fixedly sleeved.

[0015] Compared with the related art, a power conversion device for energy storage based on a network-forming energy storage provided by the present utility model has the following beneficial effects:

[0016] The utility model provides an energy storage converter based on grid-type energy storage. By arranging a storage battery, when supplying power to a load, the transformer can convert high-voltage current into low-voltage direct current and then transmit it to the storage battery for storage, so that the storage battery can convert electrical energy into chemical energy for storage, so that when a grid failure causes the transformer input current to be disconnected, the storage battery can continue to transmit current to the supercapacitor, thereby achieving long-term continuous discharge of the supercapacitor, thereby avoiding the short working time of the capacitor when it works and discharges alone, making it difficult to achieve the emergency power supply effect, thereby improving the practical effect of the converter;

[0017] By setting up an auxiliary mechanism, when the current input is overloaded, the output end of the booster is connected to the inside of the power grid. At this time, the booster can perform voltage conversion on the battery output current and then transmit it to the inside of the power grid, thereby achieving the effect of continuous current utilization, avoiding the problem of power waste caused by low output power of the converter, thereby improving the power saving effect;

[0018] By setting up a supercapacitor, when the load is continuously powered, the supercapacitor can greatly improve the stability of the output current and voltage, thereby avoiding the problem of electrical appliance failure caused by rapid disconnection and closing of the current, thereby improving the stability of the current output. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a preferred embodiment of an energy storage converter based on grid-type energy storage provided by the utility model;

[0020] Figure 2 for Figure 1 A front view of an energy storage converter based on grid-type energy storage is shown;

[0021] Figure 3 for Figure 1 A front view of a box in an energy storage converter based on grid-type energy storage is shown;

[0022] Figure 4 for Figure 1 A front view of a heat dissipation mechanism in an energy storage converter based on grid-type energy storage is shown.

[0023] Numbers in the figure: 1. Box; 2. Transformer; 3. Battery; 4. Mounting plate; 5. Supercapacitor; 6. Output port; 7. Auxiliary mechanism; 71. Support plate; 72. Booster; 8. Heat dissipation mechanism; 81. Ventilation hood; 82. Rotating motor; 83. Fan blade; 9. Filter; 10. Fixing mechanism; 101. Support frame; 102. Bolt; 11. Closing mechanism; 111. Closing door; 112. Magnet block. DETAILED DESCRIPTION

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 , wherein, Figure 1 is a schematic structural diagram of a preferred embodiment of a power conversion system for a grid-forming energy storage provided by the present utility model; Figure 2 is Figure 1 a front view of a power conversion system for a grid-forming energy storage shown in Figure 3 is Figure 1 a front view of the box body in a power conversion system for a grid-forming energy storage shown in Figure 4 is Figure 1 a front view of the heat dissipation mechanism in a power conversion system for a grid-forming energy storage shown in. A power conversion system for a grid-forming energy storage includes a box body 1, a transformer 2 is fixedly installed on the side of the inner wall of the box body 1, a storage battery 3 is fixedly installed on the bottom of the inner cavity of the box body 1, a mounting plate 4 is fixedly connected to the front of the inner wall of the box body 1, a super capacitor 5 is fixedly installed on the top of the mounting plate 4, an output port 6 is fixedly installed on the side of the box body 1, an auxiliary mechanism 7 is arranged on the front of the inner wall of the box body 1, a heat dissipation mechanism 8 is arranged on the side of the inner wall of the box body 1, a filter screen 9 is fixedly sleeved on the side of the box body 1, a fixing mechanism 10 is arranged on the bottom of the box body 1, and a closing mechanism 11 is arranged on the front of the box body 1.

[0026] The input end of the storage battery 3 is electrically connected to the output end of the transformer 2, and the number of the storage batteries 3 is three, and the three storage batteries 3 are evenly distributed on the bottom of the inner cavity of the box body 1; by arranging the storage battery 3, when powering a load, the transformer 2 can convert high-voltage current into low-voltage direct current and then transmit it to the inside of the storage battery 3 for storage, so that the storage battery 3 can convert electrical energy into chemical energy for storage, so that when the input current of the transformer 2 is disconnected due to a power grid fault, the storage battery 3 can continuously transmit current to the inside of the super capacitor 5, and then the super capacitor 5 can continuously discharge for a long time, so that the problem that the working time is short when the capacitor works alone and it is difficult to achieve the emergency power supply effect is avoided, and the practical effect of the power conversion system is improved.

[0027] The input end of the super capacitor 5 is electrically connected to the output end of the storage battery 3, and the number of the super capacitors 5 is several; by arranging the super capacitor 5, when continuously powering a load, the super capacitor 5 can greatly improve the stability of the output current and voltage, and then avoid the problem of electrical appliance failure caused by the rapid disconnection and closing of the current, thereby improving the stability of the current output.

[0028] The auxiliary mechanism 7 includes a support plate 71, which is fixedly connected to the front side of the inner wall of the box body 1. A booster 72 is fixedly installed on the top of the support plate 71, and the input end of the booster 72 is electrically connected to the output end of the battery 3. By setting the auxiliary mechanism 7, when the current input is overloaded, the output end of the booster 72 is connected to the inside of the power grid. At this time, the booster 72 can step up and convert the output current of the battery 3, and then transmit it to the inside of the power grid, thereby achieving the effect of continuous current utilization, avoiding the problem of power waste caused by small output power of the converter, thereby improving the power saving effect.

[0029] The heat dissipation mechanism 8 includes a ventilation hood 81, which is fixedly sleeved on the side of the inner wall of the box body 1. A rotating motor 82 is fixedly installed inside the ventilation hood 81, and a fan blade 83 is fixedly sleeved on the output shaft of the rotating motor 82. By setting the heat dissipation mechanism 8, when the inverter works for a long time, the rotating motor 82 is started, so that the rotating motor 82 can drive the fan blade 83 to rotate rapidly, thereby allowing the air inside and outside the box body 1 to be quickly exchanged, thereby increasing the heat discharge speed inside the box body 1, that is, improving the heat dissipation effect of the inverter.

[0030] The filter screen 9 and the mounting plate 4 are perpendicular to each other, and the filter screen 9 is made of stainless steel. When the box 1 is dissipating heat, the filter screen 9 can filter the air entering the box 1, thereby avoiding the problem of large dust entering the box 1 along with the air, causing the internal components of the inverter to become dirty, thereby improving the cleanliness of the inside of the inverter.

[0031] The fixing mechanism 10 includes a support frame 101, which is fixedly connected to the bottom of the box body 1, and the internal thread of the support frame 101 is sleeved with a bolt 102; by setting the fixing mechanism 10, when the inverter is installed and fixed, the bolt 102 is rotated so that the bolt 102 can fix the support frame 101 on the ground. At this time, the support frame 101 can support and fix the box body 1, thereby avoiding the problem of corrosion when the box body 1 is in direct contact with the wet ground, thereby improving the protection effect of the inverter.

[0032] The closing mechanism 11 includes a closing door 111, which is movably sleeved on the side of the box body 1, and a magnet block 112 is fixedly sleeved on the top of the closing door 111. By setting the closing mechanism 11, when the inverter maintenance is carried out, the closing door 111 is pulled so that the closing door 111 can be flipped, and the box body 1 can be opened at this time. When the inverter maintenance is completed, the closing door 111 is flipped, so that the magnet block 112 can drive the closing door 111 to be tightly adsorbed and fixed on the front side of the box body 1, thereby achieving the closing effect of the box body 1, thereby bringing convenience to the opening and closing of the inverter.

[0033] The working principle of an energy storage converter based on a network-forming energy storage provided by the present utility model is as follows:

[0034] The first step: First, when supplying power to a load, the transformer 2 converts high-voltage current into low-voltage direct current and then transports it into the storage battery 3 for storage. The storage battery 3 converts electrical energy into chemical energy for storage. Thus, when the input current of the transformer 2 is disconnected due to a power grid fault, the storage battery 3 continuously transports current into the supercapacitor 5. As a result, the supercapacitor 5 discharges continuously for a long time, avoiding the problem that the working time is short when the capacitor discharges alone and it is difficult to achieve the emergency power supply effect, and thus improving the practical effect of the converter. When continuously supplying power to the load, the supercapacitor 5 greatly improves the stability of the output current and voltage, avoiding the problem of electrical appliance failure caused by the rapid disconnection and closing of the current, and thus improving the stability of the current output. When the current input is overloaded, the output end of the booster 72 is connected to the power grid. At this time, the booster 72 boosts and converts the output current of the storage battery 3 and then transports it into the power grid, achieving the effect of continuous current utilization, avoiding the problem of power waste caused by a small output power of the converter, and thus improving the power saving effect;

[0035] The second step: When the converter works for a long time, start the rotating motor 82, so that the rotating motor 82 drives the fan blade 83 to rotate rapidly, and then the air inside and outside the box body 1 is exchanged quickly, improving the heat emission speed inside the box body 1, that is, improving the heat dissipation effect of the converter. When dissipating heat from the box body 1, the filter screen 9 filters the air entering the box body 1, avoiding the problem that relatively large dust enters the box body 1 along with the air and causes dirt on the internal components of the converter, and thus improving the cleanliness inside the converter. When installing and fixing the converter, rotate the bolt 102 so that the bolt 102 fixes the support frame 101 on the ground. At this time, the support frame 101 supports and fixes the box body 1, avoiding the problem of corrosion when the box body 1 directly contacts the damp ground, and thus improving the protection effect of the converter. When maintaining the converter, pull the closing door 111, so that the closing door 111 flips. At this time, the box body 1 is opened. When the maintenance of the converter is completed, flip the closing door 111 so that the magnet block 112 drives the closing door 111 to be tightly adsorbed and fixed on the front of the box body 1, achieving the closing effect of the box body 1, and thus bringing convenience to the opening and closing of the converter.

[0036] Compared with the related technology, an energy storage converter based on a network-forming energy storage provided by the present utility model has the following beneficial effects:

[0037] By providing the storage battery 3, when supplying power to the load, the transformer 2 can convert the high-voltage current into low-voltage direct current and then transmit it to the storage battery 3 for storage, so that the storage battery 3 can convert the electrical energy into chemical energy for storage, so that when the grid failure causes the input current of the transformer 2 to be disconnected, the storage battery 3 can continue to transmit the current to the supercapacitor 5, thereby achieving long-term continuous discharge of the supercapacitor 5, avoiding the short working time of the capacitor when working alone and discharging, making it difficult to achieve the emergency power supply effect, thereby improving the practical effect of the converter.

[0038] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An energy storage converter based on grid-type energy storage, comprising a box (1), characterized in that: A transformer (2) is fixedly mounted on the side of the inner wall of the box (1), a storage battery (3) is fixedly mounted on the bottom of the inner cavity of the box (1), a mounting plate (4) is fixedly connected to the front of the inner wall of the box (1), a supercapacitor (5) is fixedly mounted on the top of the mounting plate (4), an output port (6) is fixedly mounted on the side of the box (1), an auxiliary mechanism (7) is arranged on the front of the inner wall of the box (1), a heat dissipation mechanism (8) is arranged on the side of the inner wall of the box (1), a filter screen (9) is fixedly sleeved on the side of the box (1), a fixing mechanism (10) is arranged on the bottom of the box (1), and a closing mechanism (11) is arranged on the front of the box (1).

2. The energy storage converter based on grid-type energy storage according to claim 1, characterized in that: The input end of the storage battery (3) is electrically connected to the output end of the transformer (2), and the number of the storage batteries (3) is three, and the three storage batteries (3) are evenly distributed at the bottom of the inner cavity of the box body (1).

3. The energy storage converter based on grid-type energy storage according to claim 1, characterized in that: The input end of the supercapacitor (5) is electrically connected to the output end of the storage battery (3), and there are a plurality of supercapacitors (5).

4. The energy storage converter based on grid-type energy storage according to claim 1, characterized in that: The auxiliary mechanism (7) comprises a support plate (71), the support plate (71) being fixedly connected to the front side of the inner wall of the box body (1), a booster (72) being fixedly mounted on the top of the support plate (71), and an input end of the booster (72) being electrically connected to an output end of the storage battery (3).

5. The energy storage converter based on grid-type energy storage according to claim 1, characterized in that: The heat dissipation mechanism (8) comprises a ventilation hood (81), the ventilation hood (81) being fixedly sleeved on the side of the inner wall of the box body (1), a rotating motor (82) being fixedly mounted inside the ventilation hood (81), and a fan blade (83) being fixedly sleeved on the output shaft of the rotating motor (82).

6. The energy storage converter based on grid-type energy storage according to claim 1, characterized in that: The filter screen (9) and the mounting plate (4) are perpendicular to each other, and the filter screen (9) is made of stainless steel.

7. The energy storage converter based on grid-type energy storage according to claim 1, characterized in that: The fixing mechanism (10) comprises a support frame (101), the support frame (101) being fixedly connected to the bottom of the box body (1), and the internal thread of the support frame (101) being sleeved with a bolt (102).

8. The energy storage converter based on grid-type energy storage according to claim 1, characterized in that: The closing mechanism (11) comprises a closing door (111), the closing door (111) being movably sleeved on the side of the box body (1), and a magnet block (112) being fixedly sleeved on the top of the closing door (111).

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