Novel pressure storage system and wind storage and transmission integrated structure based on deep and far sea wind power base

Abstract

The embodiment of the utility model relates to a novel pressure storage system and wind storage and transmission integrated structure based on a deep and far sea wind power base. The novel pressure storage system comprises a wind generating set, a compressor unit, an expansion unit, a local load tower, a central load tower and a high mountain transverse gas storage. The wind generating set is arranged on the sea surface, the in-situ load tower is located on the coastal side of the sea surface, and the center load tower is located on the land on the side, away from the wind generating set, of the in-situ load tower. The wind generating set is respectively connected with the input ends of the local load tower and the compressor unit, the output end of the compressor unit is connected with the input end of the expansion unit, and the output end of the expansion unit is connected with the central load tower. According to the high-mountain transverse gas storage, the high-mountain transverse gas storage is arranged on the high mountain, so that gas can be compressed and stored through the high-mountain transverse gas storage, and the whole high-mountain transverse gas storage is simple in structure and easy and convenient to construct.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of wind power energy storage, and in particular to a new type of pressure storage system and a wind storage and transmission integrated structure based on a deep sea wind power base. Background Art

[0002] Offshore wind can be used as a new energy source to realize the utilization of renewable energy. Specifically, wind can be converted into wind power through wind turbines. The power generation of offshore wind turbines is related to different wind conditions (stable wind conditions, gusty wind conditions, gradual wind conditions, etc.), and the peak power consumption in coastal economically developed areas is high and the peak-to-valley load difference fluctuates greatly. The above leads to the need for coastal wind farms to be equipped with energy storage construction to improve the offshore wind energy absorption level and grid-connected regulation capabilities. At present, gas storage devices can be used to convert electrical energy into gas pressure potential energy and gas thermal energy internal energy for storage. At present, the cost of gas storage devices in the pressure storage system accounts for a high proportion of the total system cost. Natural salt caverns, oil and gas reservoirs, abandoned tunnels (flexible airtight polymer films are laid on the inner walls), etc. are low in cost but restricted by geographical conditions. Artificial lining (thin steel plate / glass reinforced plastic / concrete lining or rigid-flexible composite sealing layer filled with bentonite) caves and concrete gas storage chambers are relatively expensive (but the quality of artificial steel linings is better than that of natural salt caverns / hard rock caverns). The ground pipeline steel, metal storage tanks, thermoplastic pipes, composite tanks and underwater rigid storage tanks, flexible airbags, etc. are the most expensive. Currently, mature applications in the market include pipeline steel, salt caverns, and artificial chambers.

[0003] At present, most artificial chambers are buried within 300 meters underground (salt cavern gas storage can reach 1,000 meters), including construction / permanent shafts, connecting tunnels, gas storage projects, safe passages, etc. The structure is composed of an airtight sealing layer, lining and surrounding rock, with a diameter generally less than 30 meters, and a construction cost of 5,000-6,000 yuan / square meter (pipeline steel costs about 10,000 yuan / square meter). It is relatively more suitable for low-cost large-scale promotion, especially in the absence of natural gas storage. Specifically, it is necessary to dig from the ground to construct the shaft, and then dig at the bottom of the shaft to form an air chamber connected to the shaft, and construct a sealing layer, lining and surrounding rock on the inner wall of the air chamber, making the structure of the entire artificial chamber more complex and difficult to construct. Utility Model Content

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the embodiments of the utility model provide a new pressure storage system and a wind storage and transmission integrated structure based on a deep sea wind power base.

[0005] The embodiment of the utility model provides a new type of pressure storage system and wind storage and transmission integrated structure based on a deep sea wind power base, including a wind turbine generator set, a compressor set, an expansion unit, an on-site load tower and a central load tower;

[0006] The wind turbine generator set is arranged on the sea surface, the local load tower is located on the coast of the sea surface, and the central load tower is located on land; the wind turbine generator set is respectively connected to the local load tower and the input end of the compressor set, the output end of the compressor set is connected to the input end of the expansion unit, and the output end of the expansion unit is connected to the central load tower;

[0007] A high mountain transverse gas storage reservoir is arranged on the high mountain on land, the input end of the high mountain transverse gas storage reservoir is connected to the output end of the compressor unit, and the output end of the high mountain transverse gas storage reservoir is connected to the input end of the compressor unit.

[0008] In some embodiments, the cross-section of the high mountain horizontal gas storage is circular, elliptical, or trapezoidal.

[0009] In some embodiments, when the cross-section of the high mountain horizontal gas storage reservoir is circular, elliptical or trapezoidal, the diameter of the high mountain horizontal gas storage reservoir is not less than 30m; and / or the cross-sectional area of ​​the high mountain horizontal gas storage reservoir is greater than 700㎡.

[0010] In some embodiments, the central load tower includes a first load tower and a second load tower connected to the first load tower, and the first load tower is connected to the output end of the expansion unit.

[0011] In some embodiments, the wind turbine generator set includes at least two wind turbines, at least two of the wind turbines are disposed on the sea surface, and at least two of the wind turbines are respectively connected to the local load tower and the input end of the compressor.

[0012] In some embodiments, the compressor unit and the expander unit are connected via a three-in-one motor of "motor-phase regulator-generator", and the compressor unit and the expander unit are coaxially arranged;

[0013] A first clutch is provided between the three-in-one motor of "motor-phase condenser-generator" and the compressor unit, and a second clutch is provided between the three-in-one motor of "motor-phase condenser-generator" and the expander unit.

[0014] In some embodiments, the novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base further comprises a buffer tank, the input end of the buffer tank is connected to the output end of the compressor unit through a first regulating valve, and the output end of the buffer tank is connected to the input end of the compressor unit through a second regulating valve;

[0015] The alpine horizontal gas storage is connected to the output end of the first regulating valve and the input end of the second regulating valve respectively through the third regulating valve.

[0016] In some embodiments, a cold storage heat exchanger is shared between the first regulating valve and the input end of the buffer tank, and between the second regulating valve and the output end of the buffer tank.

[0017] In some embodiments, a pressure reducing device is provided between the cold storage heat exchanger and the input end of the buffer tank;

[0018] And / or, a boosting device is provided between the cold storage heat exchanger and the output end of the buffer tank.

[0019] In some embodiments, a common heat exchanger is provided between the compressor unit and the expander unit.

[0020] Compared with the prior art, the technical solution provided by the embodiment of the utility model has the following advantages:

[0021] The embodiment of the utility model provides a new type of pressure storage system and wind storage and transmission integrated structure based on a deep-sea wind power base, including a wind turbine generator set, a compressor set, an expansion unit, an on-site load tower and a central load tower. The wind turbine generator set is arranged on the sea surface, the on-site load tower is located on the coast of the sea surface, and the central load tower is located on land. The wind turbine generator set is respectively connected to the input end of the on-site load tower and the compressor set, the output end of the compressor set is connected to the input end of the expansion unit, and the output end of the expansion unit is connected to the central load tower. A high mountain horizontal gas storage is arranged on the high mountain on land, the input end of the high mountain horizontal gas storage is connected to the output end of the compressor set, and the output end of the high mountain horizontal gas storage is connected to the input end of the compressor set. That is to say, compared with the method of digging a vertical shaft from the ground downwards and digging an air chamber at the bottom of the vertical shaft and then setting a sealing layer, lining and surrounding rock to form a gas storage reservoir, the new compression storage system and wind storage and transmission integrated structure based on the deep sea wind power base in the embodiment of the utility model realizes the compressed storage of gas by setting a high mountain horizontal gas storage reservoir on the high mountain, thereby making the structure of the entire high mountain horizontal gas storage reservoir simple and easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the embodiments of the present utility model.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1This is a structural schematic diagram of a new type of pressure storage system and wind storage and transmission integrated structure based on a deep sea wind power base described in an embodiment of the utility model.

[0025] Among them, 1. Wind turbine generator set; 11. Wind turbine; 2. Compressor unit; 21. Compressor; 3. Expansion unit; 31. Expansion machine; 4. Local load tower; 5. Central load tower; 51. First load tower; 52. Second load tower; 6. High mountain; 61. High mountain horizontal gas storage; 71. "Motor-phase regulator-generator" three-in-one motor; 72. First clutch; 73. Second clutch; 8. Buffer tank; 81. First regulating valve; 82. Second regulating valve; 83. Third regulating valve; 84. Cold storage heat exchanger; 85. Pressure reducing device; 86. Pressure increasing device; 9. Shared heat exchanger. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the scheme of the embodiments of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the utility model, but the embodiments of the utility model can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the utility model, rather than all of the embodiments.

[0028] Reference Figure 1 As shown, this embodiment provides a new type of pressure storage system and wind storage and transmission integrated structure based on a deep sea wind power base, including a wind turbine generator set 1, a compressor unit 2, an expansion unit 3, an on-site load tower 4 and a central load tower 5.

[0029] The wind turbine generator set 1 is arranged on the sea surface, the local load tower 4 is located on the coast of the sea surface, and the central load tower 5 is located on land. The wind turbine generator set 1 is connected to the local load tower 4 and the input end of the compressor set 2 respectively, the output end of the compressor set 2 is connected to the input end of the expansion unit 3, and the output end of the expansion unit 3 is connected to the central load tower 5.

[0030] A high mountain lateral gas storage reservoir 61 is provided on the high mountain 6 on land. The input end of the high mountain lateral gas storage reservoir 61 is connected to the output end of the compressor unit 2 , and the output end of the high mountain lateral gas storage reservoir 61 is connected to the input end of the compressor unit 2 .

[0031] When implementing it, refer to Figure 1As shown, a wind turbine generator set 1 can be arranged on the sea surface, so that the wind at sea can be used to generate electricity, thereby realizing efficient use of wind. A local load tower 4 is arranged on the coast of the sea surface and connected to the wind turbine generator set 1, so that the electric energy generated by the wind turbine generator set 1 can be transmitted to the local load tower 4 for local use by users.

[0032] Furthermore, in this embodiment, the input end of the compressor unit 2 is connected to the wind turbine generator set 1, the output end of the compressor unit 2 is connected to the input end of the expansion unit 3, and the output end of the expansion unit 3 is connected to the central load tower 5, so that energy storage can be achieved by compressing air through the compressor unit 2 and energy release can be achieved by expanding the air through the expansion unit 3 to generate electricity.

[0033] Specifically, when storing energy, by driving the compressor unit 2 to operate, low-pressure air or nitrogen or carbon dioxide can be compressed to a liquid or sub / trans / supercritical state according to the power and duration of the stored electrical energy and then stored in the alpine horizontal gas storage reservoir 61. When releasing energy, the compressed air or nitrogen or carbon dioxide in the alpine horizontal gas storage reservoir 61 can be transported to the expansion unit 3 for expansion and work to generate electricity. The specific working principles of the expansion unit 3 and the compressor unit 2 can refer to the description of the relevant technology, and this embodiment does not specifically limit this.

[0034] In addition, in this embodiment, the compressor unit 2 can be configured to include a plurality of compressors 21, for example, Figure 1 The three compressors 21 shown in the figure may also be configured as two or more compressors 21. Accordingly, the expansion unit 3 may also be configured to include a plurality of expansion machines 31, for example, Figure 1 The two expansion machines 31 shown may also be provided as three or more expansion machines 31 .

[0035] Specifically, a horizontal tunnel extending in the horizontal direction can be artificially excavated on the mountain 6 to form a high mountain horizontal gas storage 61, so that the gas storage device has a simple structure, is easy to construct, and has a reduced cost. In addition, in the case of a high mountain horizontal gas storage 61 with an aquifer, its constant pressure characteristics can be used to achieve constant pressure compression and expansion of air, reducing energy consumption and equipment loss rate. At the same time, the increase in the water content of the working fluid in the high mountain horizontal gas storage 61 is conducive to more efficient near-isothermal compression under a wet compression environment, quality improvement and enthalpy increase of turbine inlet parameters, and improving gas storage capacity and density. At the same time, because the internal pressure resistance of the mountain 6 is much greater than the maximum exhaust pressure and maximum intake pressure of the compressor and expander of the existing pressure storage system, the natural mountain environment can be used to expand the artificial gas storage on a large scale at low cost to increase the energy storage capacity and density. In addition, the high mountain horizontal gas storage 61 formed after horizontal excavation on the mountain 6 to form a horizontal tunnel can greatly reduce the cost of the gas storage device and can be flexibly configured according to the geographical location and gas storage needs.

[0036] Specifically, the gas storage capacity, shape and size of the high mountain horizontal gas storage reservoir 61 can be determined according to the required gas storage capacity requirements. The construction cost of the high mountain horizontal gas storage reservoir 61 can be reduced to 3,000 yuan / square meter, and the altitude of the high mountain horizontal gas storage reservoir 61 can be basically maintained at the same altitude as the conventional pressure storage system, thereby avoiding the high cost of constructing the vertical shaft and the transportation cost caused by the long-distance longitudinal transportation line during the construction of the vertical shaft, and at the same time greatly reducing the pressure loss of high-pressure gas in the transmission process during the storage / release process.

[0037] Exemplarily, a wind turbine 1 is installed in the deep sea, where the sea breeze velocity is large and the airflow is stable. A pressure storage system with a high mountain lateral gas storage reservoir 61 can be built at the flat foot of the coastal mountain 6 to facilitate low-cost construction. A wind turbine 1 is set on the windward side of the mountain 6. Since the high altitude wind speed on the windward side of the mountain 8 is large and the airflow is stable, efficient use of wind can be achieved. In addition, an in-situ load tower 5 is set on the leeward side of the mountain 8, where the airflow sinks, warms and dries, and there is less freezing rain, so it is conducive to the construction of an in-situ load tower 5.

[0038] For example, the utilization time of the wind turbine 1 installed on the sea surface can reach 10h-14h, and the utilization time of the pressure storage system with the high-mountain horizontal gas storage 61 can reach 4h-6h, so that the ultra-high voltage transmission channel can achieve all-weather AC and DC transmission as much as possible.

[0039] Exemplarily, the sea surface in this embodiment can be located in the Shandong Peninsula (the main peak of Laoshan is 1000-1200 meters above sea level), the Yangtze River Delta (the main peak of Yandang Mountain is 1000-1100 meters above sea level), southern Fujian (the main peak of Daiyun Mountain is 1000-1100 meters above sea level), Beibu Gulf (the main peak of Shiwanda Mountain is 1400-1500 meters above sea level), and eastern Guangdong (the main peak of Lianhua Mountain is 1300-1600 meters above sea level). Looking at the world, representative areas include the west coast of North America (the average altitude of the Rocky Mountains is 2000-3000 meters) and the west coast of South America (3000-4000 meters in the Andes). The above regions have developed economies, complete industrial chains, high electricity loads, large peak-valley electricity price differences, and good coastal wind energy resources. At the same time, the nearby mountain environment is used to save the land area of ​​gas storage and reduce land acquisition costs.

[0040] That is to say, compared with the method of digging a vertical shaft from the ground downwards and digging an air chamber at the bottom of the vertical shaft and then setting a sealing layer, lining and surrounding rock to form a gas storage reservoir, the new compression storage system and wind storage and transmission integrated structure based on the deep sea wind power base in this embodiment realizes the compression storage of gas by setting a high mountain horizontal gas storage reservoir 61 on the high mountain 6 on the coastal land, thereby making the structure of the entire high mountain horizontal gas storage reservoir 61 simple and easy to construct.

[0041] In addition, in this embodiment, by setting the wind turbine 1 on the sea surface and connecting it to the on-site load tower 4 through the wind turbine 1, and then combining it with a pressure storage system with a high-mountain horizontal gas storage, a sub / trans / supercritical pressure storage system or a source-side directly coupled wind-storage-transmission integration of a wind-solar station can be realized.

[0042] Specifically, when the power supply on the source side of the wind farm matches the power demand on the load side, the pressure storage system does not work, and the wind and transmission are operated in an integrated manner. When the power supply on the source side of the wind farm is greater than the power demand on the coastal load side, especially when the sea wind intensity in the deep sea is strong and the power consumption for production and life enters a trough, the pressure storage system with the high mountain horizontal gas storage 61 begins to absorb the surplus new energy power on the source side or the grid valley power for energy storage, and converts the electric energy into the gas pressure potential energy stored in the gas storage device and the gas thermal energy internal energy stored in the heat exchange device through electromechanical equipment, and the wind, storage and transmission are operated in an integrated manner. When the power supply on the source side of the wind farm is less than the power demand on the coastal load side, especially when the sea wind intensity in the deep sea is weak and the power consumption for production and life enters a peak, the pressure storage system begins to release the previously stored electric energy for peak replenishment, and the wind, storage and transmission are operated in an integrated manner. The above integrated wind, storage and transmission systems operate in different time periods 24 hours a day in different implementation plans to improve the actual utilization rate of the AC and DC transmission lines of the UHV transmission channel, and to achieve smooth and stable output of new energy power generation grid-connected, orderly plan tracking, efficient peak load regulation and other gain functions as much as possible.

[0043] Reference Figure 1 As shown, in some embodiments, the cross section of the high mountain horizontal gas storage reservoir 61 is circular, or can also be elliptical, arched, etc., so that the excavation and construction of the high mountain horizontal gas storage reservoir 61 is relatively simple and convenient. In addition, the cross section of the high mountain horizontal gas storage reservoir 61 can also be rectangular or trapezoidal, etc. The specific shape of the high mountain horizontal gas storage reservoir 61 can be set according to the actual terrain, construction conditions, gas storage capacity and other requirements, and this embodiment does not make specific limitations on this.

[0044] Reference Figure 1 As shown, in some embodiments, the diameter of the alpine transverse gas storage reservoir 61 is not less than 30 m, so that the alpine transverse gas storage reservoir 61 can have sufficient capacity to store compressed gas.

[0045] Exemplarily, the diameter of the high mountain horizontal gas storage reservoir 61 may be 30 m, or 35 m, or 40 m, etc.

[0046] Accordingly, the cross-sectional area of ​​the high mountain horizontal gas storage reservoir 61 is not less than 700 m2. By setting the cross-sectional area of ​​the high mountain horizontal gas storage reservoir 61 to be not less than 700 m2, it has sufficient capacity for gas storage.

[0047] Exemplarily, the cross-sectional area of ​​the high mountain horizontal gas storage 61 may be 700 m2, or 750 m2, or 800 m2.

[0048] Reference Figure 1 As shown, in some embodiments, the central load tower 5 includes a first load tower 51 and a second load tower 52 connected to the first load tower 51 , and the first load tower 51 is connected to the output end of the expansion unit 3 .

[0049] That is to say, in order to meet the electricity demand of the city, the central load tower 5 can be set to include two, namely, a first load tower 51 and a second load tower 52, wherein the first load tower 51 is connected to the output end of the expansion unit 3, so that the electric energy generated by the wind turbine 1 can be transmitted to the first load tower 51, and can continue to be transmitted to the second load tower 52 through the first load tower 51, so as to finally transmit the electric energy to the large power grid in the city through the first load tower 51 and the second load tower 52 for users to use.

[0050] In addition, in other implementations, the number of central load towers 5 that can be set can also be three or more, depending on the electricity demand of the city.

[0051] Reference Figure 1 As shown, in some embodiments, the wind turbine generator set 1 includes at least two wind turbines 11, at least two wind turbine generator sets 1 are arranged on the sea surface, and at least two wind turbine generators 11 are respectively connected to the input end of the local load tower 4 and the input end of the compressor unit 2, so that the at least two wind turbine generators 11 can jointly realize the function of converting wind energy into electrical energy to further improve the utilization rate of wind.

[0052] Reference Figure 1 As shown, in some embodiments, the compressor unit 2 and the expansion unit 3 are connected through a "motor-phase regulator-generator" three-in-one motor 71, and the compressor unit 2 and the expansion unit 3 are coaxially arranged. A first clutch 72 is arranged between the three-in-one motor 71 and the compressor unit 2, and a second clutch 73 is arranged between the "motor-phase regulator-generator" three-in-one motor 71 and the expansion unit 3.

[0053] In specific implementation, by arranging the compressor unit 2 and the expansion unit 3 coaxially, the entire layout can be made more compact to reduce the volume of the entire system, and can reduce the electromechanical conversion loss caused by multi-axis connection, improve energy conversion efficiency, and be beneficial to improving the system integration level and space utilization, saving construction and operation and maintenance costs, and achieving the effect of reducing costs and increasing efficiency.

[0054] Furthermore, the "motor-phase regulator-generator" three-in-one motor 71 is connected to the compressor unit 2 through the first clutch 72, so that the "motor-phase regulator-generator" three-in-one motor 71 can be used as a motor to drive the compressor unit 2 to compress air, nitrogen or carbon dioxide, and then the compressed air, nitrogen or carbon dioxide can be stored in the alpine horizontal gas storage 61 for storage. Correspondingly, it is connected to the expansion unit 3 through the second clutch 73, so that the "motor-phase regulator-generator" three-in-one motor 71 can be used as a generator to drive the expansion unit 3 to expand and generate electricity. In addition, the "motor-phase regulator-generator" three-in-one motor 71 can also be used as a phase regulator to increase reactive output when the grid voltage drops, absorb reactive power when the grid voltage rises, maintain the grid voltage, improve system stability, and improve the system power supply quality.

[0055] That is to say, the "motor-phase regulator-generator" three-in-one motor 71 is specifically a three-in-one motor of a generator, a motor and a phase regulator. The three-in-one motor is used in conjunction with a clutch to significantly reduce the cost of mechanical equipment and electrical equipment. The specific coaxial compact arrangement is flexible and can determine the location and quantity of shared mechanical equipment and electrical equipment according to the power and speed of each section of the compressor unit 2 and the expander unit 3.

[0056] Regarding the operation of the "motor-phase-converter-generator" three-in-one motor 71, specifically, when the first clutch 72 is in a connected state and the second clutch 73 is in a disconnected state, the second output shaft of the "motor-phase-converter-generator" three-in-one motor 71 is connected to the compressor unit 2, which can drive the compressor unit 2 to operate, and at this time, the air or nitrogen or carbon dioxide compression energy storage process is performed. When the first clutch 72 is in a disconnected state and the second clutch 73 is in a connected state, the second input shaft of the "motor-phase-converter-generator" three-in-one motor 71 is connected to the expansion unit 3, which can drive the expansion unit 3 to operate and generate electricity, and at this time, the air or nitrogen or carbon dioxide expansion energy release power generation process is performed.

[0057] The specific working principles of the "motor-phase regulator-generator" three-in-one motor 71, the expansion unit 3 and the compressor unit 2 can refer to the description of the relevant technology, and will not be described in detail in this embodiment.

[0058] Reference Figure 1 As shown, in some embodiments, the new pressure storage system and wind storage and transmission integrated structure system based on the deep-sea wind power base also includes a buffer tank 8, the input end of the buffer tank 8 is connected to the output end of the compressor unit 2 through a first regulating valve 81, and the output end of the buffer tank 8 is connected to the input end of the compressor unit 2 through a second regulating valve 82.

[0059] The alpine horizontal gas storage reservoir 61 is connected to the output end of the first regulating valve 81 and the input end of the second regulating valve 82 through the third regulating valve 83 respectively.

[0060] In this embodiment, the buffer tank 8 is provided to compress the air, nitrogen or carbon dioxide into liquid state or store it in sub-, trans- or supercritical state. The system efficiency can be significantly improved by storing the compressed air, nitrogen or carbon dioxide in liquid state or sub-, trans- or supercritical state; the specific gas storage state of the pressure storage system can be flexibly selected according to the power and duration of the electric energy required to be stored in the wind farm or off-peak electricity.

[0061] Exemplarily, the first regulating valve 81 , the second regulating valve 82 , and the third regulating valve 83 may all be three-way valves.

[0062] Reference Figure 1 As shown, in some embodiments, a cold storage heat exchanger 84 is shared between the first regulating valve 81 and the input end of the buffer tank 8, and between the second regulating valve 82 and the output end of the buffer tank 8. A pressure reducing device 85 is provided between the cold storage heat exchanger 84 and the input end of the buffer tank 8; a pressure increasing device 86 is provided between the cold storage heat exchanger 84 and the output end of the buffer tank 8.

[0063] During the energy storage process, the cold energy stored in the cold storage heat exchanger 84 is used to cool and liquefy the compressed air, nitrogen or carbon dioxide at constant pressure, and then is stored at normal pressure in the alpine horizontal gas storage reservoir 61 after being depressurized by the depressurization device 85. During the energy release process, the cold storage heat exchanger 84 is used to heat the air, nitrogen or carbon dioxide to room temperature and then transport it to the expander for expansion and power generation.

[0064] Reference Figure 1 As shown, in some embodiments, a shared heat exchanger 9 is provided between the compressor unit 2 and the expansion unit 3 .

[0065] Specifically, the cost of the heat storage and heat exchange subsystem can be reduced by allowing the compressor unit 2 and the expansion unit 3 to share the heat exchanger 9. The configurations of the compressor unit 2 and the expansion unit 3 are different in different application scenarios, and the location and number of the shared heat exchanger 9 can be arranged according to the temperature difference and pressure difference of the matching heat exchanger.

[0066] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0067] The above description is only a specific implementation of the embodiment of the utility model, so that those skilled in the art can understand or implement the embodiment of the utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the embodiment of the utility model. Therefore, the embodiment of the utility model will not be limited to these embodiments described herein, but will be loaded with the widest range consistent with the principles and novel features of the embodiment of the utility model described herein.

Claims

1. A new type of pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base, characterized in that: It comprises a wind power generator set (1), a compressor set (2), an expansion unit (3), an on-site load tower (4) and a central load tower (5); The wind turbine generator set (1) is arranged on the sea surface, the local load tower (4) is located on the coast of the sea surface, and the central load tower (5) is located on land; the wind turbine generator set (1) is respectively connected to the input end of the local load tower (4) and the input end of the compressor set (2), the output end of the compressor set (2) is connected to the input end of the expansion unit (3), and the output end of the expansion unit (3) is connected to the input end of the central load tower (5); A high mountain transverse gas storage reservoir (61) is provided on the high mountain (6) on land, the input end of the high mountain transverse gas storage reservoir (61) is connected to the output end of the compressor unit (2), and the output end of the high mountain transverse gas storage reservoir (61) is connected to the input end of the compressor unit (2).

2. The novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base according to claim 1 is characterized in that: The cross section of the high mountain horizontal gas storage (61) is circular, elliptical or trapezoidal.

3. The novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base according to claim 2 is characterized in that: When the cross-section of the high mountain transverse gas storage reservoir (61) is circular, elliptical or trapezoidal, the diameter of the high mountain transverse gas storage reservoir (61) is not less than 30 m; and / or the cross-sectional area of ​​the high mountain transverse gas storage reservoir (61) is greater than 700 m2.

4. The novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base according to claim 1 is characterized in that: The central load tower (5) comprises a first load tower (51) and a second load tower (52) connected to the first load tower (51), and the first load tower (51) is connected to the output end of the expansion unit (3).

5. The novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base according to claim 1 is characterized in that: The wind generator set (1) comprises at least two wind generators (11), at least two of the wind generators (11) are arranged on the sea surface, and at least two of the wind generators (11) are respectively connected to the input end of the local load tower (4) and the input end of the compressor set (2).

6. The novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base according to any one of claims 1 to 5, characterized in that: The compressor unit (2) and the expansion unit (3) are connected via a "motor-phase regulator-generator" three-in-one motor (71), and the compressor unit (2) and the expansion unit (3) are coaxially arranged; A first clutch (72) is provided between the three-in-one motor (71) of "motor-phase regulator-generator" and the compressor unit (2), and a second clutch (73) is provided between the three-in-one motor (71) of "motor-phase regulator-generator" and the expansion unit (3).

7. The novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base according to any one of claims 1 to 5, characterized in that: The novel pressure storage system and wind storage and transmission integrated structure based on a deep-sea wind power base further comprises a buffer tank (8), the input end of the buffer tank (8) being connected to the output end of the compressor unit (2) via a first regulating valve (81), and the output end of the buffer tank (8) being connected to the input end of the compressor unit (2) via a second regulating valve (82); The alpine horizontal gas storage reservoir (61) is connected to the output end of the first regulating valve (81) and the input end of the second regulating valve (82) respectively through a third regulating valve (83).

8. The novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base according to claim 7 is characterized in that: A cold storage heat exchanger (84) is shared between the first regulating valve (81) and the input end of the buffer tank (8), and between the second regulating valve (82) and the output end of the buffer tank (8).

9. The novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base according to claim 8 is characterized in that: A pressure reducing device (85) is provided between the cold storage heat exchanger (84) and the input end of the buffer tank (8); And / or, a boosting device (86) is provided between the cold storage heat exchanger (84) and the output end of the buffer tank (8).

10. The novel pressure storage system and wind storage and transmission integrated structure based on deep sea wind power base according to any one of claims 1 to 5, characterized in that: A shared heat exchanger (9) is provided between the compressor unit (2) and the expansion unit (3).

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