A variable current boosting device and energy storage power station
Patent Information
- Application Number
- CN202522169224.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-10-14
AI Technical Summary
Poor heat dissipation of the busbar can cause overheating of the equipment, triggering derating protection and affecting the efficiency and output capacity of the energy storage power station.
A busbar is installed inside the AC chamber of the energy storage inverter unit. Combined with the ventilation structure and exhaust fan in the base, forced ventilation is used to enhance heat dissipation, ensure the IP protection level of the busbar, and quickly remove heat through forced ventilation.
It improves the heat dissipation capacity of the busbar, avoids overheating protection, ensures full-power operation of the energy storage power station, and enhances efficiency and output capacity.
Smart Images
Figure CN224935371U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of converter voltage boosting equipment, and more specifically, it relates to a converter voltage boosting equipment and an energy storage power station. Background Technology
[0002] The main equipment in a large-scale energy storage power station includes energy storage battery units and converter booster units. Converter booster units generally consist of energy storage inverter units and step-up transformer units. The function of the energy storage inverter units is to convert the current form and control the system. The function of the step-up transformer units is to increase the voltage level.
[0003] After the energy storage inverter converts DC power into low-voltage AC power, it is first led out through its internal AC output terminals. If the energy storage inverter consists of multiple power modules connected in parallel, their AC outputs will first be connected to the same busbar to combine multiple currents into a single total current. The busbar is then connected to the low-voltage input terminal of the step-up transformer.
[0004] Busbars carry high voltage, and any dust accumulation or condensation can cause short circuits or flashovers, thus requiring high IP protection levels. However, busbars operate in a relatively sealed environment, leading to poor heat dissipation. If heat dissipation is poor, even if the current does not exceed the design value, the busbar temperature may still exceed safety limits. To protect the equipment, the system must be derated, meaning the energy storage power station cannot operate at full power, reducing system efficiency and output capacity. Utility Model Content
[0005] The purpose of this utility model is to provide a converter boosting device and an energy storage power station, which aims to solve the technical problem of poor heat dissipation of the busbar in the prior art.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a converter booster device, comprising: A base for fixing to the ground; the base is provided with a first air inlet; A step-up transformer unit is fixed on the base; the step-up transformer unit is provided with a second air outlet; An energy storage inverter unit is fixed on the base; the energy storage inverter unit has an AC cavity, which is connected to the inner cavity of the step-up transformer unit, and a busbar is provided in the AC cavity; The AC chamber and the base cavity are provided with a first ventilation structure, and the AC chamber and / or the inner cavity of the step-up transformer are also provided with an exhaust fan.
[0007] In one possible implementation, the exhaust fan is located at the second air outlet.
[0008] In some embodiments, the exhaust fan is also disposed on the cavity wall of the AC cavity, and the exhaust side faces the outside of the energy storage inverter unit.
[0009] In one possible implementation, the AC cavity is located at the bottom of the energy storage inverter unit; the bottom surface of the AC cavity is open; the first ventilation structure includes a first ventilation opening formed on the top surface of the base, the opening area of the first ventilation opening being smaller than the open area of the bottom surface of the AC cavity.
[0010] In one possible implementation, the energy storage inverter unit includes: A base, fixed to the pedestal; a vertical partition is provided inside the base, dividing the inner cavity of the base into an AC cavity and a DC cavity; the DC cavity is used for laying cables; and Multiple energy storage inverters are arranged in parallel on the base; each of the energy storage inverters has a third air inlet at the bottom and a third air outlet at the top.
[0011] In some embodiments, a fourth air inlet is provided on the wall of the DC cavity, and a second ventilation structure is provided between the DC cavity and the inner cavity of each of the energy storage inverters.
[0012] In some embodiments, the second ventilation structure includes: A second ventilation opening is provided on the top surface of the base; and The second air vent is located on the bottom plate of the energy storage inverter and corresponds vertically to the second ventilation opening.
[0013] In some embodiments, there is a gap between the base plate of the energy storage inverter and the top surface of the base; the opening area of the second vent is greater than or equal to the opening area of the second air vent, and less than the top surface area of the base.
[0014] In one possible implementation, the inner cavity of the base is used for laying cables; the base is partially embedded below the ground and partially above the ground, and the first air inlet is provided on the side of the portion above the ground. The first air inlet is arranged around the four sides of the base; a third ventilation structure is provided between the inner cavity of the booster transformer and the inner cavity of the base.
[0015] The beneficial effects of the converter booster device provided by this utility model are as follows: Compared with the prior art, the converter booster device of this utility model has the busbar installed inside the AC cavity of the energy storage inverter unit, providing a relatively sealed installation environment for the busbar and meeting its IP protection level requirements; a first ventilation structure is provided between the AC cavity and the base cavity, allowing cold air from the outside to enter the base cavity from the first air inlet and flow into the AC cavity through the first ventilation structure; in addition, an exhaust fan is provided in the AC cavity and / or the booster transformer unit cavity, which provides forced ventilation, enhances airflow circulation, and can quickly remove the heat generated by the busbar, and discharge the hot air from the second air outlet or the exhaust side of the exhaust fan, thereby reducing the temperature of the busbar, preventing the busbar from triggering derating protection due to overheating, ensuring that the energy storage power station can operate at full power, and improving the efficiency and output capacity of the energy storage power station.
[0016] This utility model also provides an energy storage power station, including multiple converter and booster devices as described above; the multiple converter and booster devices are distributed in a rectangular array.
[0017] The energy storage power station provided by this utility model, by adopting the above-mentioned converter and booster equipment, can improve the heat dissipation capacity of the busbar, avoid the busbar from triggering derating protection due to overheating, ensure that the energy storage power station can operate at full power, and improve the efficiency and output capacity of the energy storage power station. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of a converter booster device provided in one embodiment of the present invention; Figure 2 for Figure 1 A structural schematic diagram of the converter booster device from another angle; Figure 3 for Figure 2 A schematic diagram of the base after removing one of its side plates and the energy storage inverter located on the outside after removing one of its side plates; Figure 4 This is a schematic diagram of the structure of a converter booster device provided in another embodiment of the present invention.
[0020] In the picture: 1. Base; 11. First air inlet; 12. First ventilation opening; 13. Third ventilation opening; 2. Step-up transformer unit; 21. Second air inlet; 22. Second air outlet; 3. Energy storage inverter unit; 31. Base; 311. AC cavity; 312. DC cavity; 313. Vertical partition; 314. Fourth air inlet; 315. Second ventilation opening; 32. Energy storage inverter; 321. Third air inlet; 322. Third air outlet; 323. Second air vent; 4. Busbar; 5. Exhaust fan; 100. Ground. Detailed Implementation
[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0022] Please refer to the following: Figures 1 to 4 The present invention provides a converter and booster device. The converter and booster device includes a base 1, a booster transformer unit 2, and an energy storage inverter unit 3. The base 1 is fixed to the ground 100. A first air inlet 11 is provided on the base 1. The booster transformer unit 2 is fixed to the base 1. A second air outlet 22 is provided on the booster transformer unit 2. The energy storage inverter unit 3 is fixed to the base 1. The energy storage inverter unit 3 has an AC cavity 311, which communicates with the inner cavity of the booster transformer unit 2. A busbar 4 is provided inside the AC cavity 311. A first ventilation structure is provided between the AC cavity 311 and the inner cavity of the base 1. An exhaust fan 5 is also provided in the AC cavity 311 and / or the inner cavity of the booster transformer unit 2.
[0023] Base 1 provides a supporting foundation for the energy storage inverter unit 3 and the step-up transformer unit 2. Base 1 is a hollow structure, and its four edges protrude beyond the four edges of the energy storage inverter unit 3 in the horizontal direction. Since the step-up transformer unit 2 occupies a larger area, three sides of base 1 can be flush with three sides of the step-up transformer unit 2. Base 1 is fixed to the ground 100, and both units are fixed to base 1, ensuring structural stability. Furthermore, the primary ventilation structure ensures a clean airflow channel, reducing interference with airflow organization during maintenance.
[0024] The core function of the energy storage inverter unit 3 is to perform current conversion and system control. During discharge (power supply to the grid), its main function is inversion, converting the low-voltage DC power from the energy storage battery unit into low-voltage AC power that meets grid requirements. During charging (power draw from the grid), its function is rectification, converting the AC power from the grid into suitable DC power to charge the energy storage battery unit.
[0025] The core function of step-up transformer unit 2 is to increase the voltage level. It raises the low-voltage AC power output from energy storage inverter unit 3 to medium or high voltage to achieve the voltage level required for long-distance power transmission.
[0026] It should be noted that both the energy storage inverter unit 3 and the step-up transformer unit 2 have a cuboid structure, and the unit's cabinet consists of six panels (front panel, rear panel, left panel, right panel, top panel, and bottom panel). At least one side panel of the energy storage inverter unit 3 has a third air inlet 321 and a third air outlet 322, with the third air inlet 321 located below the third air outlet 322. One vertical side panel of the step-up transformer unit 2 has the aforementioned second air outlet 22, and another vertical side panel of the step-up transformer unit 2 also has a second air inlet 21, located below the second air outlet 22.
[0027] Both the energy storage inverter unit 3 and the step-up transformer unit 2 employ natural air cooling. The energy storage inverter unit 3 receives air from the lower third air inlet 321; the cool air passes through the internal electrical components, carrying away their heat; and the hot air exits from the upper third air outlet 322, forming an upward cooling path. Similarly, the step-up transformer unit 2 receives air from the lower second air inlet 21; the cool air passes through the internal electrical components, carrying away their heat; and the hot air exits from the upper second air outlet 22, forming an upward cooling path.
[0028] The AC chamber 311 is a relatively sealed cavity without an air inlet, providing a relatively sealed installation environment for the busbar 4, preventing short circuits caused by dust or condensation, and meeting its IP protection level requirements. For heat dissipation of the busbar 4, cool air enters from the first air inlet 11 of the base 1, flows into the AC chamber 311 through the first ventilation structure, is forced out by the exhaust fan 5, passes through the busbar 4, and is then discharged from the second air outlet 22 of the step-up transformer unit 2 or from the exhaust side of the exhaust fan 5. Preferably, a filter structure can be added to the first ventilation structure to filter dust, water droplets, and other impurities in the air.
[0029] The first ventilation structure can be an independent ventilation duct, which can concentrate the air volume and allow cold air to enter the exchange chamber 311 quickly and in large quantities; the first ventilation structure can also be a hole opened on the wall of the exchange chamber 311 and a hole opened on the base 1, which can simplify the structure and reduce costs.
[0030] Compared with the prior art, the converter and booster device provided by this utility model provides a relatively sealed installation environment for the busbar 4 within the AC cavity 311, meeting its IP protection level requirements. A first ventilation structure is provided between the AC cavity 311 and the inner cavity of the base 1, allowing cold air from the outside to enter the inner cavity of the base 1 through the first air inlet 11 and flow into the AC cavity 311 through the first ventilation structure. In addition, an exhaust fan 5 is provided in the inner cavity of the AC cavity 311 and / or the booster transformer 2. The exhaust fan 5 provides forced ventilation, enhancing airflow circulation and quickly removing the heat generated by the busbar 4. The hot air is then discharged from the second air outlet 22 or the outlet side of the exhaust fan 5, thereby reducing the temperature of the busbar 4 and preventing it from triggering derating protection due to overheating. This ensures that the energy storage power station can operate at full power, improving the efficiency and output capacity of the energy storage power station.
[0031] In some embodiments, the exhaust fan 5 described above can be as follows: Figure 1 The structure shown is described in the following document. Figure 1 The exhaust fan 5 is located at the second air outlet 22.
[0032] By placing the exhaust fan 5 at the second air outlet 22, it effectively provides a strong suction at the end of the entire ventilation path. Cool air enters from the first air inlet 11 of the base 1, flows through the inner cavity of the base 1, enters the AC chamber 311 through the first ventilation structure, blows across the surface of the busbar 4 to carry away heat, and the hot air enters the inner cavity of the step-up transformer unit 2, and is finally forcibly extracted from the second air outlet 22 by the exhaust fan 5 at the end. The above-mentioned limitation of the airflow path ensures that the cooling airflow to the busbar 4 is continuous and concentrated, and the heat dissipation efficiency is much higher than that of natural heat dissipation or the method of only setting up fans in a local area.
[0033] The exhaust fan 5 serves not only to remove heat from the inside of the step-up transformer unit 2, but also to provide overall ventilation for the two interconnected spaces, the AC chamber 311 and the inner cavity of the step-up transformer unit 2. Under strong suction, not only is the heat from the busbar 4 rapidly removed, but the heat generated during the operation of the step-up transformer unit 2 is also promptly dissipated, preventing heat accumulation inside the equipment, avoiding the heat island effect, reducing the operating temperature of the entire converter and step-up equipment, and improving the reliability and lifespan of all internal electrical components.
[0034] Preferably, the exhaust fan 5 is a fan that is equipped with the step-up transformer unit 2 itself, eliminating the need to design and install an additional fan system for the AC cavity 311, which simplifies the equipment structure, reduces the number of parts, and saves the heat dissipation cost of the busbar 4.
[0035] In some embodiments, the exhaust fan 5 described above can also be as follows: Figure 4 The structure shown is described in the following document. Figure 4The exhaust fan 5 is also installed on the cavity wall of the AC cavity 311, and the air outlet side faces the outside of the energy storage inverter unit 3.
[0036] In this embodiment, there are two sets of exhaust fans 5, one set located at the second air outlet 22 and the other set on the cavity wall of the AC chamber 311. The exhaust fan 5 located at the second air outlet 22 can be the exhaust fan 5 that is equipped with the booster transformer unit 2 itself.
[0037] Adding an external exhaust fan 5 to the AC cavity 311 where the busbar 4 is located provides the shortest and most direct exhaust path for the heat generated by the busbar 4. The heat does not need to pass through the inner cavity of the step-up transformer unit 2; it can be immediately extracted by the exhaust fan 5 and discharged to the outside of the AC cavity 311.
[0038] Adding an exhaust fan 5 to the wall of the AC cavity 311 can more effectively cope with the rapid temperature rise caused by instantaneous peak current or high ambient temperature, keeping the temperature of the busbar 4 at a lower level. When the exhaust fan 5 of the AC cavity 311 undertakes most of the heat dissipation task of the busbar 4, the amount of hot air flowing into the inner cavity of the step-up transformer 2 will be significantly reduced. Therefore, the step-up transformer 2 can obtain a lower temperature cooling airflow, its own heat dissipation effect is improved, the operating temperature is reduced, and it is beneficial to extend its life and reliability.
[0039] In addition, even if the exhaust fan 5 at the second air outlet 22 fails, the exhaust fan 5 in the AC cavity 311 can still work independently, providing the most basic heat dissipation guarantee for the busbar 4 and increasing the system's reliability redundancy.
[0040] It should be noted that while installing the exhaust fan 5 will add an opening to the wall of the AC chamber 311, a dustproof and insect-proof screen can be designed at this opening to maintain necessary protection while ensuring ventilation. Since the exhaust fan 5 is for exhausting air, a negative pressure or balanced air pressure is maintained inside the chamber, which can prevent dust from being forcibly forced into the internal gaps.
[0041] In some embodiments, the first ventilation structure described above may employ, for example... Figure 3 The structure shown is described in the following document. Figure 3 The AC cavity 311 is located at the bottom of the energy storage inverter unit 3; the bottom surface of the AC cavity 311 is open; the first ventilation structure includes a first ventilation opening 12 opened on the top surface of the base 1, and the opening area of the first ventilation opening 12 is smaller than the opening area of the bottom surface of the AC cavity 311.
[0042] When cooling air enters the AC chamber 311 from the relatively large inner cavity of the base 1 through the smaller first vent 12, the airflow velocity increases significantly according to the principle of fluid continuity. The accelerated airflow can more effectively disperse the stagnant air layer attached to the surface of the busbar 4, greatly enhancing the effect of forced convection heat transfer.
[0043] Although the bottom of the AC chamber 311 is open, foreign objects must first enter the inner cavity of the base 1 through the first air inlet 11 on the side of the base 1, and then through the first vent 12 to reach the busbar 4. This is equivalent to setting up two barriers, reducing the risk of large foreign objects directly contacting the high-voltage busbar 4.
[0044] Furthermore, the open bottom of the AC cavity 311 simplifies the structure of the energy storage inverter unit 3 and makes it easier to manufacture. During installation, the energy storage inverter unit 3 can simply be placed directly on the base 1, ensuring that the first vent 12 is aligned with the AC cavity 311 and sealed. When the busbar 4 needs maintenance, the entire energy storage inverter unit 3 can be lifted directly, fully exposing the busbar 4, which is very convenient.
[0045] In some embodiments, the energy storage inverter unit 3 described above can be adopted as follows: Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The energy storage inverter unit 3 includes a base 31 and multiple energy storage inverters 32. The base 31 is fixed on the base 1; a vertical partition 313 is provided inside the base 31, which extends along a first direction and divides the inner cavity of the base 31 into an AC cavity 311 and a DC cavity 312; the DC cavity 312 is used for laying cables; multiple energy storage inverters 32 are arranged in parallel on the base 31; each energy storage inverter 32 has a third air inlet 321 at the bottom and a third air outlet 322 at the top.
[0046] The base 31 is used to support multiple energy storage inverters 32, serving as the mounting base for the multiple energy storage inverters 32. In addition, the base 31 is also used to lay the busbar 4 and cables.
[0047] The base 31 is clearly divided into an AC cavity 311 and a DC cavity 312 by a built-in vertical partition 313. The partition completely physically isolates the busbar 4 from the DC side cables, avoiding electromagnetic interference that may be generated by high-voltage, high-current AC power on DC signals. More importantly, it prevents short circuits between the DC side and the high-voltage AC side due to line faults or insulation damage, greatly improving the safety of the equipment.
[0048] Each energy storage inverter 32 is a complete energy conversion unit. Multiple energy storage inverters 32 are arranged in parallel cabinets to achieve power superposition and redundancy. The failure of a single inverter will not cause the entire system to shut down, improving the availability and reliability of the system.
[0049] In addition, each energy storage inverter 32 has an independent and complete heat dissipation duct. Cooling air enters the interior of the energy storage inverter 32 from the lower third air inlet 321, carrying away the heat from the heat-generating electrical components, and is discharged from the upper third air outlet 322. Most of the heat generated by the energy storage inverter 32 itself is directly discharged to the external environment through its vertical air duct, without discharging hot air into the base 31 or AC cavity 311, ensuring that the heat generated by the energy storage inverter 32 does not accumulate on the busbar 4.
[0050] Although each energy storage inverter 32 is equipped with a third air inlet 321 for intake of cold air, the parallel arrangement of multiple energy storage inverters 32 leads to a reduction in the air inlet area or air competition for each individual inverter 32, resulting in insufficient air intake. To address these issues, in some embodiments, the base 31 can also adopt a design such as... Figure 1 The structure shown is described in the following document. Figure 1 The DC cavity 312 has a fourth air inlet 314 on its cavity wall, and a second ventilation structure is provided between the DC cavity 312 and the inner cavity of each energy storage inverter 32.
[0051] It should be noted that multiple fourth air inlets 314 are provided on the cavity wall of the DC cavity 312, and the multiple fourth air inlets 314 correspond one-to-one with the multiple energy storage inverters 32.
[0052] The fourth air inlet 314 allows ambient cold air to directly enter the DC cavity 312. The second ventilation structure allows the cold air to flow through the DC cavity 312 and then into the internal air duct of the energy storage inverter 32. The second ventilation structure connects the DC cavity 312 with the internal cavity of the energy storage inverter 32, meaning that the cold air entering from the fourth air inlet 314 becomes one of the air intake sources for the heat dissipation system of the energy storage inverter 32, increasing the air intake volume of a single energy storage inverter 32.
[0053] In addition, although the DC side voltage of the energy storage inverter unit 3 is lower than that of the AC side, the current is huge, and the cables and connectors still generate considerable heat. If the DC cavity 312 is sealed, the accumulated heat will form a new heat island, which may lead to aging of cable insulation or loosening of connection points. The dedicated fourth air inlet 314 ensures that the heat in the DC cavity 312 can be removed in time.
[0054] In some embodiments, the second ventilation structure described above may employ, for example... Figure 3 The structure shown is described in the following document. Figure 3It includes a second ventilation opening 315 on the top surface of the base 31 and a second air vent 323 on the bottom plate of the energy storage inverter 32, with the second air vent 323 corresponding to the second ventilation opening 315 vertically.
[0055] The second vent 315 and the second air vent 323 are channels connecting the DC cavity 312 and the inner cavity of the energy storage inverter 32. Together with the third air inlet 321 and the third air outlet 322, they form a vertical heat dissipation path from bottom to top. Ambient cool air enters the DC cavity 312 through the fourth air inlet 314, passes through the second vent 315 and the second air vent 323 into the inner cavity of the energy storage inverter 32, flows through the heat-generating electrical components of the energy storage inverter 32, and is discharged from the upper third air outlet 322. Utilizing the principle that hot air, being less dense, naturally rises, cool air is injected from the bottom and hot air is discharged from the top, resulting in minimal heat dissipation resistance and maximum efficiency.
[0056] The second vent 315 and the second air vent 323 together define a forced cooling airflow path. After entering the DC cavity 312 from the fourth air inlet 314, the cold air cannot diffuse freely; it can only flow upwards through the second vent 315 and then enter its interior through the second air vent 323. This forced cooling airflow path helps maintain air pressure, ensuring sufficient airflow through the inner cavity of the energy storage inverter 32, achieving forced air cooling.
[0057] Preferably, please refer to Figure 3 Based on the above implementation, there is a gap between the bottom plate of the energy storage inverter 32 and the top surface of the base 31; the opening area of the second vent 315 is greater than or equal to the opening area of the second air vent 323, and smaller than the bottom plate area of the base 31.
[0058] The distance between the base plate of the energy storage inverter 32 and the top surface of the base 31, together with the relatively large second vent 315, forms a flat static pressure box or equalization chamber located below the energy storage inverter unit 3. Cooling air from the DC cavity 312 first enters this equalization chamber through the second vent 315, undergoes brief mixing and pressure equalization in this small space, and then enters the interior of the energy storage inverter 32 through the second air vent 323.
[0059] If the second vent 315 is directly adjacent to the second air vent 323, the airflow will be concentrated at a high speed from the second vent 315 to the second air vent 323, resulting in uneven airflow distribution. Only the area directly opposite the second air vent 323 may be effectively cooled. However, through the buffering of the equalization chamber, the airflow velocity is reduced, and the static pressure tends to be uniform. This allows cold air to enter the energy storage inverter 32 smoothly and evenly from the entire area of the second air vent 323, increasing the air intake volume.
[0060] In fluid mechanics, when airflow moves from a larger cross-section to a smaller cross-section, it contracts, resulting in energy loss. Designing the opening area of the second vent 315 to be greater than or equal to the opening area of the second air passage 323 ensures a smoother contraction effect when airflow enters the second air passage 323 from the equalization chamber, effectively reducing flow resistance. Lower flow resistance means that, under the same fan power or natural wind pressure, a larger volume of cold air can be delivered, improving heat dissipation capacity.
[0061] In some embodiments, the base 11 may adopt the following... Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The inner cavity of the base 1 is used for laying cables; part of the base 1 is embedded below the ground 100 and part is located above the ground 100, and the side of the part above the ground 100 is provided with a first air inlet 11. The first air inlet 11 is arranged around the four sides of the base 1; a third ventilation structure is provided between the inner cavity of the booster transformer 2 and the inner cavity of the base 1.
[0062] Due to the thermal inertia of soil, underground temperatures are typically 100°C lower than the ambient surface temperature, and the diurnal temperature fluctuations are much smaller than those of the air at 100°C. When the base 1 is partially embedded underground, its inner cavity walls (especially the underground portion) come into contact with the cooler soil. The air inside the base 1's cavity exchanges heat with the soil through the inner walls, thus being cooled.
[0063] Therefore, the air drawn in through the first air inlet 11, upon entering the inner cavity of the base 1, is not still ambient temperature air, but rather low-temperature air that has been naturally cooled by the soil. This pre-cooled air is then sent to the AC chamber 311 through the first ventilation structure and to the step-up transformer unit 2 through the third ventilation structure. Due to the lower inlet air temperature, more heat can be carried away with the same airflow, significantly improving heat dissipation efficiency. This directly results in a slower temperature rise inside the equipment and a lower peak operating temperature.
[0064] Lower operating temperatures mean that the possibility of equipment triggering power derating due to overheating is greatly reduced, ensuring the continuous high power output capability of the energy storage power station in hot weather and improving the economic benefits of the power station.
[0065] In addition, base 1 also serves as an integrated cable management system, laying high-voltage, low-voltage power cables and control cables within its internal cavity, thus achieving integrated cable corridor functionality. This eliminates the need to excavate cable trenches or erect cable trays outside the equipment, resulting in a very clean and tidy surrounding environment. Furthermore, the cables are protected within the robust internal cavity of base 1, avoiding the risks of mechanical damage, trampling, and animal bites that can result from exposure, and also improving resistance to electromagnetic interference. All cables are centralized in a pre-designed channel, facilitating unified inspection, maintenance, and replacement.
[0066] Specifically, the bottom surface of the step-up transformer unit 2 is open; the second ventilation structure includes a third ventilation opening 13 on the top surface of the base 1, and the opening area of the third ventilation opening 13 is smaller than the open area of the bottom surface of the step-up transformer unit 2.
[0067] The bottom surface of the step-up transformer unit 2 is completely open, with only a small third vent 13 on the top surface of the base 1 directly below it. This effectively creates a closed, low-height plenum between the bottom of the step-up transformer unit 2 and the top surface of the base 1. Cold air from the interior of the base 1, after passing through the third vent 13, first enters this plenum for buffering and pressure equalization, and then is evenly distributed throughout the entire open bottom area of the step-up transformer unit 2.
[0068] The bottom of the step-up transformer unit 2 is completely open, eliminating the need for a complex structure with a separate air inlet at the bottom, thus simplifying the manufacturing of the unit's enclosure. During installation, the step-up transformer unit 2 can be placed directly on the base 1 without precisely aligning it with any air inlet. For maintenance requiring hoisting, it can be lifted directly without the need for disassembly of complex ductwork connections.
[0069] Based on the same inventive concept, embodiments of this application also provide an energy storage power station, including multiple of the above-mentioned converter-boost devices; the multiple converter-boost devices are distributed in a rectangular array. In addition, the energy storage power station also includes multiple energy storage battery devices, with each energy storage battery device corresponding one-to-one with the multiple converter-boost devices; or, one converter-boost device corresponds to two or four energy storage battery devices.
[0070] The energy storage power station provided by this utility model, by adopting the above-mentioned converter and booster equipment, can improve the heat dissipation capacity of the busbar 4, avoid the busbar 4 from triggering derating protection due to overheating, ensure that the energy storage power station can operate at full power, and improve the efficiency and output capacity of the energy storage power station.
[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A converter-boosting device, characterized in that, include: A base (1) is used to fix it on the ground (100); the base (1) is provided with a first air inlet (11); A step-up transformer unit (2) is fixed on the base (1); the step-up transformer unit (2) is provided with a second air outlet (22); An energy storage inverter unit (3) is fixed on the base (1); the energy storage inverter unit (3) has an AC cavity (311), the AC cavity (311) is connected to the inner cavity of the step-up transformer unit (2), and a busbar (4) is provided in the AC cavity (311); The first ventilation structure is provided between the AC cavity (311) and the inner cavity of the base (1), and the inner cavity of the AC cavity (311) and / or the booster transformer unit (2) is also provided with an exhaust fan (5).
2. The converter-boost device as described in claim 1, characterized in that, The exhaust fan (5) is located at the second air outlet (22).
3. The converter and boost converter as described in claim 2, characterized in that, The exhaust fan (5) is also installed on the cavity wall of the AC cavity (311), and the air outlet side faces the outside of the energy storage inverter unit (3).
4. The converter and boost converter as described in claim 1, characterized in that, The AC cavity (311) is located at the bottom of the energy storage inverter unit (3); the bottom surface of the AC cavity (311) is open; the first ventilation structure includes a first ventilation opening (12) opened on the top surface of the base (1), and the opening area of the first ventilation opening (12) is smaller than the opening area of the bottom surface of the AC cavity (311).
5. The converter and boost converter as described in claim 1, characterized in that, The energy storage inverter unit (3) includes: A base (31) is fixed on the base (1); a vertical partition (313) is provided inside the base (31), the vertical partition (313) dividing the inner cavity of the base (31) into an AC cavity (311) and a DC cavity (312); the DC cavity (312) is used for laying cables; and Multiple energy storage inverters (32) are arranged in parallel on the base (31); each of the energy storage inverters (32) has a third air inlet (321) at the bottom and a third air outlet (322) at the top.
6. The converter and boost converter as described in claim 5, characterized in that, The DC cavity (312) has a fourth air inlet (314) on its cavity wall, and a second ventilation structure is provided between the DC cavity (312) and the inner cavity of each of the energy storage inverters (32).
7. The converter and boost converter as described in claim 6, characterized in that, The second ventilation structure includes: A second ventilation opening (315) is provided on the top surface of the base (31); and The second air vent (323) is located on the bottom plate of the energy storage inverter (32) and corresponds vertically to the second air vent (315).
8. The converter and boost converter as described in claim 7, characterized in that, There is a gap between the bottom plate of the energy storage inverter (32) and the top surface of the base (31); the opening area of the second vent (315) is greater than or equal to the opening area of the second air vent (323), and smaller than the top surface area of the base (31).
9. The converter and boost converter as described in claim 1, characterized in that, The inner cavity of the base (1) is used for laying cables; the base (1) is partially embedded below the ground (100) and partially located above the ground (100), and the first air inlet (11) is provided on the side of the part located above the ground (100); The first air inlet (11) is arranged around the four sides of the base (1); a third ventilation structure is provided between the inner cavity of the booster transformer (2) and the inner cavity of the base (1).
10. An energy storage power station, characterized in that, It includes multiple converter boost devices as described in any one of claims 1-9; the multiple converter boost devices are distributed in a rectangular array.