Efficient heat dissipation structure of smoothing reactor of water energy storage unit

Abstract

The utility model relates to the field of heat dissipation structures, in particular to an efficient heat dissipation structure of a smoothing reactor of a water energy storage unit. According to the technical scheme, a connecting plate is arranged at the upper end of a telescopic air cylinder, a protective cover is arranged outside the connecting plate, a turning plate is arranged at the front end of the protective cover, cooling fins are arranged at the rear end of the protective cover, fan covers are arranged on the two sides of the protective cover, fixed fans are arranged in the fan covers, and a water cooling pipe is arranged on one side of each fixed fan. Open holes are formed in the two ends of the water cooling pipe. The telescopic air cylinder is fixed through the connecting block, the telescopic air cylinder stretches out and draws back, the connecting plate and the protective cover are driven to move, and the height is adjusted. The turning plate can be rotated to be opened and closed, and the variable-speed pumped storage equipment is contained. The cooling fins carry out heat absorption and heat dissipation work, the fan cover protects the fixed fan, water is externally connected from the opening and enters the water cooling pipe, the fixed fan blows air, and the heat dissipation work is achieved.

Description

High-efficiency heat dissipation structure of smoothing reactor in hydro-storage unit Technical Field

[0001] This utility model relates to the field of heat dissipation structures, and in particular to a high-efficiency heat dissipation structure for smoothing reactors in hydroelectric power units. Background Technology

[0002] The smoothing reactor of a hydro-storage unit is an inductive device used in the power conversion system of a hydro-storage power station. It is usually connected in series in the DC circuit. Through its inductive characteristics, it suppresses current ripple, maintains the continuity of DC current, and protects power electronic equipment from voltage surges or harmonic interference. Pumped storage uses water as an energy storage medium to realize the storage and management of electrical energy through the mutual conversion of electrical energy and potential energy. It uses the electricity generated during the off-peak period to pump water to the upper reservoir and releases water to the lower reservoir to generate electricity during the peak period. It can convert the excess electricity generated when the grid load is low into high-value electricity generated during the peak period. It is suitable for frequency regulation and phase regulation, stabilizes the frequency and voltage of the power system, and can also improve the efficiency of thermal power plants and nuclear power plants in the system.

[0003] Existing pumped storage hydroelectric power equipment lacks a heat dissipation structure and mostly relies on natural wind for cooling. However, during long-term operation, this can cause the equipment to overheat and be damaged.

[0004] Therefore, since most existing pumped storage hydroelectric power generation equipment relies on natural wind for cooling and lacks a heat dissipation structure, a high-efficiency heat dissipation structure for the smoothing reactor of a hydroelectric power generation unit can be designed to solve the above problems. Summary of the Invention

[0005] In order to overcome the shortcomings of existing pumped storage equipment, which mostly rely on natural wind for cooling and lack heat dissipation structures, and which can lead to overheating and damage of the equipment during long-term operation.

[0006] The technical solution of this utility model is as follows: a high-efficiency heat dissipation structure for a smoothing reactor in a hydroelectric storage unit, comprising an electric roller, a connecting block, a telescopic cylinder, a connecting plate, a protective cover, a flap, heat dissipation fins, a fan cover, a fixed fan, a water-cooling pipe, and openings. The upper end of the electric roller is provided with a connecting block, the upper end of the connecting block is provided with a telescopic cylinder, the upper end of the telescopic cylinder is provided with a connecting plate, the outside of the connecting plate is provided with a protective cover, the front end of the protective cover is provided with a flap, the rear end of the protective cover is provided with heat dissipation fins, the sides of the protective cover are provided with fan covers, the inside of the fan covers is provided with a fixed fan, one side of the fixed fan is provided with a water-cooling pipe, and the two ends of the water-cooling pipe are provided with openings.

[0007] Preferably, the electric roller, connecting block, telescopic cylinder and connecting plate are integrated into one unit, and there are four sets in total, with each set located inside the protective cover.

[0008] Preferably, the protective cover is configured as a hollow block structure.

[0009] Preferably, the flap is located at the front end of the protective cover and is rotatably connected to the protective cover.

[0010] Preferably, there are thirteen heat dissipation fins, which are fixedly installed at the rear end of the protective cover and are evenly distributed.

[0011] Preferably, the fan cover, fixed fan, water cooling pipe and opening are set as one group, and the fan cover and fixed fan are set as another group, and are fixedly installed on both sides of the protective cover.

[0012] Preferably, the fixed fans on both sides are set to run in the same direction, the water cooling pipes are set to be connected to external water, and the openings are set at both ends of the water cooling pipes.

[0013] The beneficial effects of this utility model are:

[0014] 1. An electric roller facilitates the movement of the entire device. A connecting block secures a telescopic cylinder, which extends and retracts, moving the connecting plate and protective cover to adjust the height. A flip-up switch allows for the enclosure of the variable-speed pumped-storage hydroelectric power unit. Heat dissipation fins absorb and dissipate heat, while a fan cover protects and secures the fan. Water enters the water-cooling pipe through an opening, and the fixed fan blows air to achieve heat dissipation, providing multiple efficient cooling methods. This overcomes the shortcomings of existing pumped-storage hydroelectric power units, which mostly rely on natural wind for cooling and lack a proper heat dissipation structure, leading to overheating and equipment damage during prolonged operation. Attached Figure Description

[0015] Figure 1 shows a three-dimensional schematic diagram of the high-efficiency heat dissipation structure of the smoothing reactor in the water storage unit of this utility model.

[0016] Figure 2 shows a schematic diagram of the electric roller of the high-efficiency heat dissipation structure of the smoothing reactor of the water storage unit of this utility model.

[0017] Figure 3 shows a schematic diagram of the telescopic cylinder of the high-efficiency heat dissipation structure of the smoothing reactor of the water storage unit of this utility model.

[0018] Figure 4 shows a schematic diagram of the water-cooled pipe of the high-efficiency heat dissipation structure of the smoothing reactor of the water storage unit of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Electric roller; 2. Connecting block; 3. Telescopic cylinder; 4. Connecting plate; 5. Protective cover; 6. Flip plate; 7. Heat dissipation fins; 8. Fan cover; 9. Fixed fan; 10. Water cooling pipe; 11. Opening. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Among the currently discovered feasible technologies, the high-efficiency heat dissipation structure of the smoothing reactor in a hydro-storage unit typically has the following types and characteristics:

[0022] air-cooled heat dissipation structure

[0023] Composition: It mainly consists of a fan, an air-cooled radiator, and monitoring components such as a wind pressure relay. The air-cooled radiator usually uses a finned profile radiator or a heat pipe radiator.

[0024] Working principle: When the heat-generating components such as thyristors in the equipment are working, the heat sink conducts heat to the fins. The fins are arranged in the air duct, and the fan forces the air to flow, completing the heat exchange with the air and thus carrying away the heat.

[0025] Advantages: The system has a simple structure and an extremely low failure rate. The air-cooled SFC uses air heat exchange, so the equipment is not affected by the ambient temperature of the factory, resulting in higher stability. The workload of operation and maintenance is small, and it can be basically maintenance-free. The annual inspection work mainly involves measuring the fan power circuit and replacing the cabinet door filter.

[0026] Disadvantages: The heat dissipation efficiency is relatively lower than that of water cooling. In high power density equipment, a larger fan and more heat dissipation channels may be required, which takes up more space.

[0027] Water-cooled heat dissipation structure

[0028] Composition: Typically consists of internal and external water cooling systems. The internal water cooling system includes water-cooled radiators, water pumps, voltage regulators, deionization branches, and meters for temperature, pressure, and conductivity. The external water cooling system is usually equipped with three-way valves and pressure gauges. Water-cooled radiators typically use profile radiators with water channels.

[0029] Working principle: Cooling water flowing through the radiator cools the heating element, and then exchanges heat with the external water cooling system through the plate heat exchanger. Finally, the external water cooling system removes the heat.

[0030] Advantages: Water-cooled heat sinks have a low thermal resistance coefficient and can withstand a large operating current. They can be used with low DC voltage and high DC current. Under the same output power, the thyristor generates relatively more heat, but due to the good cooling effect, it can still effectively dissipate heat.

[0031] Disadvantages: The cooling system is complex and has a relatively high failure rate, especially prone to problems such as water leakage, abnormal conductivity, and abnormal pressure. It requires external cooling water, has certain requirements for water quality, and may face unsuitable water temperatures in different seasons. For example, excessively high water temperatures in summer are not conducive to heat exchange, while excessively low water temperatures in northern regions in winter may lead to condensation.

[0032] Heat pipe cooling structure

[0033] Composition: It consists of heat pipes, heat dissipation fins, mounting brackets, etc. A heat pipe is a highly efficient heat transfer element, consisting of a shell, wick, and end caps, and is filled with a working fluid.

[0034] Working principle: Heat is transferred by the evaporation and condensation cycle of the working fluid inside the heat pipe. At the heating end, the working fluid absorbs heat and evaporates into vapor. The vapor flows rapidly inside the pipe to the heat dissipation end, where it cools and condenses into liquid, releasing heat. The liquid then flows back to the heating end through the wick, and the cycle repeats continuously.

[0035] Advantages: It has extremely high thermal conductivity, which can quickly transfer heat from the heat source to the heat dissipation fins, resulting in high heat dissipation efficiency; it has good isothermal properties, which can make the temperature distribution of the heat source more uniform; it does not require external power drive, is reliable in operation, and has low maintenance costs.

[0036] Disadvantages: Heat pipes have high manufacturing requirements and relatively high costs; under high load and long-term operation conditions, heat pipes may dry out or age, affecting heat dissipation performance.

[0037] Oil-cooled heat dissipation structure (commonly used in components such as motors)

[0038] Composition: For components such as thrust bearings, the external circulation cooling method is generally adopted. The cooling system is located outside the bearing oil sump. The oil cooler usually has a shell-and-tube or plate structure.

[0039] Working principle: In a shell-and-tube oil cooler, hot oil flows inside the tubes, while cold cooling water flows on the shell side, exchanging heat through the tube walls; in a plate-type oil cooler, hot and cold oil flow in the gap between two thin plates, exchanging heat through the plates.

[0040] Advantages: Oil has a high specific heat capacity, can absorb more heat, and has a good heat dissipation effect; it also has a good lubrication and protection effect on equipment.

[0041] Disadvantages: Shell-and-tube heat exchangers are relatively large in size, while plate heat exchangers have high requirements for cooling water quality, are relatively difficult to clean and maintain, and have high operating and maintenance costs.

[0042] Smoothing reactor for hydro-storage unit

[0043] By absorbing and smoothing the DC current ripple after rectification through high inductance, high-frequency harmonic components are reduced, ensuring the stability of the DC bus current and improving the operating efficiency of the frequency converter or inverter.

[0044] During power conversion (such as when the inverter switches phase or the load changes abruptly), the energy storage function prevents the DC current from being interrupted, thus preventing equipment failures caused by current discontinuity (such as the inverter bridge stopping working).

[0045] When a short circuit or inverter failure occurs in the system, the high impedance characteristics of the smoothing reactor can limit the peak short-circuit current and protect sensitive devices such as thyristors by slowing down the current rise rate.

[0046] It needs to adapt to the high power density requirements of hydro-storage units and withstand long-term high-current operation on the DC side.

[0047] Please refer to Figures 1-4. This utility model provides an embodiment of a high-efficiency heat dissipation structure for a smoothing reactor in a hydroelectric storage unit. The structure includes an electric roller 1, a connecting block 2, a telescopic cylinder 3, a connecting plate 4, a protective cover 5, a flap 6, heat dissipation fins 7, a fan cover 8, a fixed fan 9, a water-cooling pipe 10, and openings 11. The electric roller 1 has a connecting block 2 at its upper end, a telescopic cylinder 3 at its upper end, a connecting plate 4 at its upper end, a protective cover 5 on the outside of the connecting plate 4, a flap 6 at the front end of the protective cover 5, heat dissipation fins 7 at the rear end of the protective cover 5, fan covers 8 on both sides of the protective cover 5, a fixed fan 9 inside the fan cover 8, a water-cooling pipe 10 on one side of the fixed fan 9, and openings 11 at both ends of the water-cooling pipe 10. The electric roller 1 facilitates the displacement of the entire device. Connecting block 2 fixes telescopic cylinder 3. Telescopic cylinder 3 extends and retracts, causing connecting plate 4 and protective cover 5 to shift and adjust the height. Flip plate 6 can be rotated to allow the variable speed pumped storage equipment to enter and be contained. Electric roller 1, connecting block 2, telescopic cylinder 3, and connecting plate 4 are integrated into one unit, and there are four sets in total, each set located inside the protective cover 5. The protective cover 5 is a hollow block structure. Flip plate 6 is located at the front end of the protective cover 5 and is rotatably connected to it. Thirteen heat dissipation fins 7 are provided and fixedly located at the rear end of the protective cover 5, evenly distributed. Fan cover 8, fixed fan 9, water cooling pipe 10, and opening 11 are set as one group, and fan cover 8 and fixed fan 9 are set as another group, fixedly located on both sides of the protective cover 5. The fixed fans 9 on both sides are in the same direction, the water cooling pipe 10 is externally connected to water, and the opening 11 is located at both ends of the water cooling pipe 10. The heat dissipation fins 7 absorb and dissipate heat, the fan cover 8 protects and fixes the fan 9, water enters the water cooling pipe 10 through the opening 11, and the fixed fan 9 blows air to achieve heat dissipation, thus achieving multiple efficient heat dissipation.

[0048] During operation, the electric roller 1 facilitates the displacement of the entire device. The connecting block 2 secures the telescopic cylinder 3, which extends and retracts, causing the connecting plate 4 and protective cover 5 to shift and adjust the height. The flip plate 6 can be rotated to enclose the variable-speed pumped storage equipment. The heat dissipation fins 7 absorb and dissipate heat, while the fan cover 8 protects and secures the fan 9. Water enters the water-cooling pipe 10 through the opening 11, and the fixed fan 9 blows air to achieve heat dissipation, realizing multiple efficient heat dissipation methods and completing all operations.

[0049] Through the above steps, the electric roller 1 facilitates the displacement of the entire device. The connecting block 2 secures the telescopic cylinder 3, which extends and retracts, causing the connecting plate 4 and protective cover 5 to move and adjust the height. The flip plate 6 can be rotated to enclose the variable-speed pumped storage device. The heat dissipation fins 7 absorb and dissipate heat, and the fan cover 8 protects and secures the fan 9. Water enters the water-cooling pipe 10 through the opening 11, and the fixed fan 9 blows air to achieve heat dissipation, realizing multiple efficient heat dissipation methods. This overcomes the shortcomings of existing pumped storage devices, which mostly rely on natural wind for cooling and lack a heat dissipation structure, leading to overheating and equipment damage during prolonged operation.

[0050] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A high-efficiency heat dissipation structure for a smoothing reactor in a hydroelectric storage unit, comprising an electric roller (1), characterized in that: It also includes a connecting block (2), a telescopic cylinder (3), a connecting plate (4), a protective cover (5), a flap (6), heat dissipation fins (7), a fan cover (8), a fixed fan (9), a water cooling pipe (10), and an opening (11). The upper end of the electric roller (1) is provided with a connecting block (2), the upper end of the connecting block (2) is provided with a telescopic cylinder (3), the upper end of the telescopic cylinder (3) is provided with a connecting plate (4), the outside of the connecting plate (4) is provided with a protective cover (5), the front end of the protective cover (5) is provided with a flap (6), the rear end of the protective cover (5) is provided with heat dissipation fins (7), the sides of the protective cover (5) are provided with fan covers (8), the inside of the fan cover (8) is provided with a fixed fan (9), the side of the fixed fan (9) is provided with a water cooling pipe (10), and the two ends of the water cooling pipe (10) are provided with openings (11).

2. The high-efficiency heat dissipation structure for the smoothing reactor of a hydro-storage unit according to claim 1, characterized in that: The electric roller (1), connecting block (2), telescopic cylinder (3) and connecting plate (4) are integrated into one unit, and there are four sets in total. The four sets are respectively located inside the protective cover (5).

3. The high-efficiency heat dissipation structure for the smoothing reactor of a hydro-storage unit according to claim 1, characterized in that: The protective cover (5) is designed as a hollow block structure.

4. The high-efficiency heat dissipation structure for the smoothing reactor of a hydro-storage unit according to claim 1, characterized in that: The flap (6) is located at the front end of the protective cover (5) and is rotatably connected to the protective cover (5).

5. The high-efficiency heat dissipation structure for the smoothing reactor of a hydro-storage unit according to claim 1, characterized in that: There are thirteen heat dissipation fins (7), which are fixedly installed at the rear end of the protective cover (5) and are evenly distributed.

6. The high-efficiency heat dissipation structure for the smoothing reactor of a hydro-storage unit according to claim 1, characterized in that: The fan cover (8), the fixed fan (9), the water cooling pipe (10) and the opening (11) are set as one group, and the fan cover (8) and the fixed fan (9) are set as another group, and are fixedly installed on both sides of the protective cover (5).

7. The high-efficiency heat dissipation structure for the smoothing reactor of a hydro-storage unit according to claim 1, characterized in that: The fixed fans (9) on both sides are set to be in the same direction, the water cooling pipe (10) is set to be connected to external water, and the opening (11) is set at both ends of the water cooling pipe (10).

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