Novel pressure storage system and wind and light storage and transmission integrated structure based on Saggos clean energy base

Abstract

The embodiment of the utility model relates to a novel pressure storage system and wind and light storage and transmission integrated structure based on a Saggos clean energy base. The novel pressure storage system and wind and light storage and transmission integrated structure comprises a wind generating set, a photovoltaic photo-thermal unit, 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 and the local load tower are arranged on a high mountain, the central load tower is located on the land far away from the windward side of the high mountain, and the photovoltaic photo-thermal unit is arranged on the land and connected with the central 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-solar-storage-transmission integrated structure based on the Shagohuang clean energy base. Background Art

[0002] Wind or light can be used as new energy to realize the utilization of renewable energy. The power generation of wind turbines is related to different wind conditions (stable wind conditions, gusty wind conditions, gradually changing wind conditions, etc.), while the power generation of solar power generators is related to different hours of sunshine and light radiation, etc. As a result, wind and solar power plants often need to be equipped with energy storage to improve the wind and solar power consumption 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.

[0003] 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.

[0004] 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

[0005] 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, solar, storage and transmission integrated structure based on the Shagohuang clean energy base.

[0006] The embodiment of the utility model provides a new type of pressure storage system and wind-solar storage-transmission integrated structure based on the Shagohuang clean energy base, including a wind turbine generator set, a photovoltaic thermal unit, a compressor unit, an expansion unit, an on-site load tower, and a central load tower;

[0007] The wind turbine generator set and the local load tower are both arranged on a high mountain, the central load tower and the photovoltaic thermal unit are both located on land and the central load tower is connected to the photovoltaic thermal unit; the wind turbine generator set is respectively connected to the local load tower and the input end of the compressor unit, the output end of the compressor unit 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;

[0008] A high mountain horizontal gas storage is arranged on the high mountain, the input end of the high mountain horizontal gas storage is connected to the output end of the compressor unit, and the output end of the high mountain horizontal gas storage is connected to the input end of the compressor unit.

[0009] In some embodiments, the cross-section of the high mountain horizontal gas storage is circular, elliptical, or trapezoidal.

[0010] 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 not less than 700㎡.

[0011] In some embodiments, the photovoltaic thermal unit includes a photovoltaic generator and a photothermal generator, and the output end of the photovoltaic generator and the output end of the photothermal generator are both connected to the central load tower.

[0012] 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 respectively connected to the output end of the photovoltaic thermal unit and the output end of the expansion unit.

[0013] In some embodiments, the local load tower is located on the leeward side of the mountain.

[0014] 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;

[0015] A first clutch is provided between the three-in-one motor and the compressor unit, and a second clutch is provided between the three-in-one motor and the expansion unit.

[0016] In some embodiments, the novel pressure storage system and wind-solar storage-transmission integrated structure based on the Shagohuang clean energy base further includes 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;

[0017] 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.

[0018] 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;

[0019] A pressure reducing device is provided between the cold storage heat exchanger and the input end of the buffer tank;

[0020] A boosting device is provided between the cold storage heat exchanger and the output end of the buffer tank.

[0021] In some embodiments, a common heat exchanger is provided between the compressor unit and the expander unit.

[0022] Compared with the prior art, the technical solution provided by the embodiment of the utility model has the following advantages:

[0023] The embodiment of the utility model provides a new type of pressure storage system and wind-solar storage-transmission integrated structure based on the Shagohuang clean energy base, including a wind turbine, a photovoltaic thermal unit, a compressor unit, an expansion unit, an on-site load tower, and a central load tower. The wind turbine and the on-site load tower are both set on high mountains, and the central load tower and the photovoltaic thermal unit are both located on land and the central load tower is connected to the photovoltaic thermal unit. The wind turbine is connected to the input ends of the on-site load tower and the compressor unit, respectively, the output end of the compressor unit 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 set on the mountain, and the input end of the high mountain horizontal gas storage is connected to the output end of the compressor unit, and the output end of the high mountain horizontal gas storage is connected to the input end of the compressor unit. That is to say, compared to 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 pressure storage system and wind-solar storage and transmission integrated structure based on the Shagohuang clean energy base in the embodiment of the utility model, by setting up a high mountain horizontal gas storage reservoir on the high mountain, the high mountain horizontal gas storage reservoir can then be used to realize the compressed storage of gas, thereby making the structure of the entire high mountain horizontal gas storage reservoir simple and easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] 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.

[0026] Figure 1 This is a structural schematic diagram of the new pressure storage system and wind, solar, storage and transmission integrated structure based on the Shagohuang clean energy base described in the embodiment of the utility model.

[0027] Among them, 1. Wind turbine generator set; 11. Wind turbine; 2. Photovoltaic thermal generator set; 21. Photovoltaic generator; 22. Photovoltaic thermal generator; 3. Compressor unit; 31. Compressor; 4. Expansion unit; 41. Expansion machine; 5. Local load tower; 6. Central load tower; 61. First load tower; 62. Second load tower; 7. Alpine horizontal gas storage; 8. Alpine; 91. "Electric motor-phase regulator-generator" three-in-one motor; 92. First clutch; 93. Second clutch; 94. Buffer tank; 95. First regulating valve; 96. Second regulating valve; 97. Third regulating valve; 98. Cold storage heat exchanger; 981. Pressure reducing device; 982. Pressure increasing device; 99. Shared heat exchanger. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] Reference Figure 1 As shown, this embodiment provides a new type of pressure storage system and wind, solar, storage and transmission integrated structure based on the Shagohuang clean energy base, including a wind turbine generator set 1, a photovoltaic thermal unit 2, a compressor unit 3, an expansion unit 4, an on-site load tower 5, and a central load tower 6.

[0031] The wind turbine generator set 1 and the local load tower 5 are both arranged on a high mountain 8, the central load tower 6 and the photovoltaic thermal generator set 2 are both located on land, and the central load tower 6 is connected to the photovoltaic thermal generator set 2. The wind turbine generator set 1 is connected to the local load tower 5 and the input end of the compressor set 3 respectively, the output end of the compressor set 3 is connected to the input end of the expansion unit 4, and the output end of the expansion unit 4 is connected to the central load tower 6.

[0032] A high mountain transverse gas storage reservoir 7 is provided on the high mountain 8 , the input end of the high mountain transverse gas storage reservoir 7 is connected to the output end of the compressor unit 3 , and the output end of the high mountain transverse gas storage reservoir 7 is connected to the input end of the compressor unit 3 .

[0033] When implementing it, refer to Figure 1 As shown, a wind turbine generator set 1 and an on-site load tower 5 can be set on a high mountain 8, and the high mountain 8 is specifically a mountain with a high altitude on land, such as a mountain around the terrain of Shagohuang. The wind turbine generator set 1 can be set on the windward side of the high mountain 8, so that the wind on the high mountain 8 can be fully utilized for wind power generation to improve the utilization rate of the wind.

[0034] The local load tower 5 is arranged on the leeward side of the mountain 8 and connected to the wind turbine 1, so that the electric energy generated by the wind turbine 1 can be transmitted to the local load tower 5 for local use by users. The photovoltaic thermal generator 2 is arranged on land and connected to the central load tower 6, so that light energy and thermal energy can be effectively used to generate electricity, and the generated electric energy can be transmitted to the central load tower 6 for use by users.

[0035] Furthermore, in this embodiment, the input end of the compressor unit 3 is connected to the wind turbine generator set 1, the output end of the compressor unit 3 is connected to the input end of the expansion unit 4, and the output end of the expansion unit 4 is connected to the central load tower 6, so that electricity can be generated by compressing air through the compressor unit 3 and expanding it through the expansion unit 4.

[0036] Specifically, when storing energy, by driving the compressor unit 3 to operate, low-pressure air or nitrogen or carbon dioxide can be compressed to a liquid state or a 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 7. When releasing energy, the compressed air or nitrogen or carbon dioxide in the alpine horizontal gas storage reservoir 7 can be transported to the expansion unit 4 for expansion and work to generate electricity. The specific working principles of the expansion unit 4 and the compressor unit 3 can refer to the description of the relevant technology, and this embodiment does not specifically limit this.

[0037] In addition, in this embodiment, the compressor unit 3 can be configured to include a plurality of compressors 31, for example, Figure 1The three compressors 31 shown in the figure may also be configured as two or more compressors 31. Accordingly, the expansion unit 4 may also be configured to include a plurality of expansion machines 41, for example, Figure 1 The two expanders 41 shown may also be provided as three or more expanders 41. The wind turbine generator set 1 may be provided to include a plurality of wind turbines 11, for example, two wind turbines 11 or two or more wind turbines 11.

[0038] Specifically, a horizontal tunnel extending in the horizontal direction can be artificially excavated on the mountain 8 to form a high mountain horizontal gas storage 7, so that the gas storage device has a simple structure, simple construction, and reduced cost. In addition, in the case of a high mountain horizontal gas storage 7 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 7 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 high mountain 8 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 7 formed by horizontal excavation on the high mountain 8 can greatly reduce the cost of the gas storage device and can be flexibly configured according to the geographical location and gas storage needs.

[0039] Specifically, the gas storage capacity, shape and size of the high mountain horizontal gas storage reservoir 7 can be determined according to the required gas storage capacity requirements. The construction cost of the high mountain horizontal gas storage reservoir 7 can be reduced to 3,000 yuan / square meter, and the altitude of the high mountain horizontal gas storage reservoir 7 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 transshipment 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.

[0040] Exemplarily, when the photovoltaic thermal unit 2 is set on land, the land may be, for example, a low-lying area in a desert or basin. These locations not only naturally concentrate light but also prevent sand and consolidate soil, thereby efficiently realizing the utilization of light and heat. In addition, a pressure storage system with a high mountain lateral gas storage reservoir 7 can be built at the flat area at the foot of the mountain 8 to facilitate low-cost construction. A wind turbine 1 is set on the windward side of the mountain 8. Due to the high altitude wind speed and stable airflow on the windward side of the mountain 8, efficient use of wind can be achieved. In addition, an on-site load tower 5 is set on the leeward side of the mountain 8, where the airflow sinks, warms, and is dry and has little freezing rain, so it is conducive to the construction of an on-site load tower 5.

[0041] For example, the photovoltaic thermal energy utilization time of the photovoltaic thermal unit 2 installed in a low-lying area can reach 6h-8h, the utilization time of the pressure storage system with the high-mountain horizontal gas storage reservoir 7 can reach 4h-6h, and the utilization time of the wind turbine 1 can reach 8h-12h. In this way, the ultra-high voltage transmission channel can achieve all-weather AC and DC transmission as much as possible.

[0042] For example, the high mountain 8 in this embodiment can be located in Inner Mongolia (Kubqi Desert planned 81 million kilowatts, Ulan Buh Desert planned 63 million kilowatts, Tengger Desert planned 77 million kilowatts, Badain Jaran Desert planned 63 million kilowatts + Yinshan Mountains with an average altitude of 1500-2000 meters, Helan Mountains with an average altitude of 2000-3000 meters, Qilian Mountains with an average altitude of 4000-5000 meters), Qinghai (Hainan Gobi planned 32.5 million kilowatts, Haixi Qaidam The desert is planned to have a capacity of 60 million kilowatts + the Qilian Mountains have an average altitude of 4,000-5,000 meters, the Bayankala Mountains have an average altitude of 4,500-6,000 meters) and Xinjiang (the Kumtag Desert is planned to have a capacity of 15 million kilowatts, the Gobi Desert in the northern foothills of the Tianshan Mountains is planned to have a capacity of 11.5 million kilowatts, the Gurbantunggut Desert is planned to have a capacity of 15 million kilowatts + the Altun Mountains have an average altitude of 3,000-4,000 meters, the Tianshan Mountains have an average altitude of 3,000-5,000 meters, and the Altai Mountains have an average altitude of 1,000-3,000 meters).

[0043] 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 pressure storage system and wind-solar storage and transmission integrated structure based on the Shagohuang clean energy base in this embodiment, by setting a high mountain horizontal gas storage reservoir 7 on the high mountain 8, can then use it to realize the compressed storage of gas, thereby making the structure of the entire high mountain horizontal gas storage reservoir 7 simple and easy to construct.

[0044] In addition, in this embodiment, by setting the wind turbine 1 on a high mountain 8 and the photovoltaic thermal unit 2 on land, and connecting the wind turbine 1 to the local load tower 5, and the photovoltaic thermal unit 2 to the central load tower 6, and combining with a pressure storage system with a high mountain horizontal gas storage reservoir 7, a sub / trans / supercritical pressure storage system or a source-side directly coupled wind-solar station with wind-solar storage and transmission integration can be realized.

[0045] Specifically, when the power supply on the source side of the wind and solar power station matches the power demand on the load side, the pressure storage system does not work, and the wind, solar and transmission are integrated. When the power supply on the source side of the wind and solar power station is greater than the power demand on the load side, especially when the solar radiation intensity is the highest at noon and the power consumption for production and life decreases temporarily, the pressure storage system with the high mountain horizontal gas storage reservoir 7 begins to absorb the surplus new energy power on the source side or the low-peak power of the power grid for energy storage, and converts the electric energy into the gas pressure potential energy stored in the high mountain horizontal gas storage reservoir 7 and the gas thermal energy internal energy stored in the heat exchange device through electromechanical equipment, and the wind, solar and storage and transmission are integrated. When the power supply on the source side of the wind and solar power station is less than the power demand on the load side, especially when the solar radiation intensity is basically zero after sunset and the evening peak of electricity consumption occurs temporarily, the pressure storage system begins to release the previously stored electric energy for peak supplement, and the wind, storage and transmission are integrated to improve the actual utilization rate of the AC and DC transmission lines of the UHV transmission channel, and to achieve the smooth and stable output of the new energy power generation grid connection, orderly plan tracking, efficient peak regulation and frequency regulation and other gain functions as much as possible.

[0046] Reference Figure 1 As shown, in some embodiments, the cross section of the high mountain horizontal gas storage reservoir 7 is circular, or can also be elliptical, arched, etc., so that the excavation and construction of the high mountain horizontal gas storage reservoir 7 is relatively simple and convenient. The specific shape of the high mountain horizontal gas storage reservoir 7 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.

[0047] Reference Figure 1 As shown, in some embodiments, the diameter of the alpine transverse gas storage reservoir 7 is not less than 30 m, so that the alpine transverse gas storage reservoir 7 can have sufficient capacity to store compressed gas.

[0048] For example, the diameter of the high mountain horizontal gas storage reservoir 7 may be 30 m, or 35 m, or 40 m, etc.

[0049] Accordingly, the cross-sectional area of ​​the high mountain horizontal gas storage reservoir 7 is not less than 700 m2. By setting the cross-sectional area of ​​the high mountain horizontal gas storage reservoir 7 to be not less than 700 m2, it has sufficient capacity for gas storage.

[0050] Exemplarily, the cross-sectional area of ​​the high mountain horizontal gas storage reservoir 7 may be 700 m2, or 750 m2, or 800 m2.

[0051] Reference Figure 1 As shown, in some embodiments, the photovoltaic thermal unit 2 includes a photovoltaic generator 21 and a thermal generator 22 , and the output end of the photovoltaic generator 21 and the output end of the thermal generator 22 are both connected to the central load tower 6 .

[0052] In specific implementation, the photovoltaic generator 21 of the photovoltaic thermal unit 2 can make full use of the sunlight, and convert the light into electricity and transmit it to the central load tower 6 for users to use. In addition, the photovoltaic thermal generator 22 of the photovoltaic thermal unit 2 can also make full use of the heat of the sunlight, and convert the heat into electrical energy, and then transmit it to the central load tower 6 for users to use.

[0053] It should be noted that the central load tower 6 can be located in a city on land or on the outskirts of the city. The land is richer in solar thermal resources than the mountains 8, so the photovoltaic thermal unit 2 can be used to convert light and heat into electrical energy and then transmit it to the central load tower 6, which then allows the central load tower 6 to transmit the electrical energy to the large power grid in the city for users to use.

[0054] Reference Figure 1 As shown, in some embodiments, the central load tower 6 includes a first load tower 61 and a second load tower 62 connected to the first load tower 61, and the first load tower 61 is connected to the output ends of the photovoltaic thermal unit 2 and the expansion unit 4 respectively.

[0055] That is to say, in order to meet the electricity demand of the city, the central load tower 6 can be set to include two, namely, a first load tower 61 and a second load tower 62, wherein the first load tower 61 is respectively connected to the output ends of the photovoltaic thermal unit 2 and the expansion unit 4, so that the electric energy generated by the photovoltaic thermal unit 2 can be transmitted to the first load tower 61, and can continue to be transmitted to the second load tower 62 through the first load tower 61, so as to finally transmit the electric energy to the large power grid in the city through the first load tower 61 and the second load tower 62 for users to use.

[0056] In addition, in other implementations, the number of central load towers 6 that can be set can also be three or more, depending on the electricity demand of the city.

[0057] Reference Figure 1 As shown, in some embodiments, the local load tower 5 is arranged on the leeward side of the high mountain 8, so that the wind turbine generator set 1 located on the windward side of the high mountain 8 can generate electricity by using the wind on the high mountain 8 and then transmit the electric energy to the nearby local load tower 5, and multiple wind turbines 11 are respectively connected to the input end of the local load tower 5 and the input end of the compressor unit 3 to meet the local use needs of nearby users.

[0058] Reference Figure 1As shown, in some embodiments, the compressor unit 3 and the expander unit 4 are connected through a "motor-phase condenser-generator" three-in-one motor 91, and the compressor unit 3 and the expander unit 4 are coaxially arranged. A first clutch 92 is arranged between the "motor-phase condenser-generator" three-in-one motor 91 and the compressor unit 3, and a second clutch 93 is arranged between the "motor-phase condenser-generator" three-in-one motor 91 and the expander unit 4.

[0059] In specific implementation, by arranging the compressor unit 3 and the expansion unit 4 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.

[0060] Furthermore, the "motor-phase regulator-generator" three-in-one motor 91 is connected to the compressor unit 3 through the first clutch 92, so that the "motor-phase regulator-generator" three-in-one motor 91 can be used as a motor to drive the compressor unit 3 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 7 for storage. Correspondingly, it is connected to the expansion unit 4 through the second clutch 93, so that the "motor-phase regulator-generator" three-in-one motor 91 can be used as a generator to drive the expansion unit 4 to expand and generate electricity. In addition, the "motor-phase regulator-generator" three-in-one motor 91 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.

[0061] That is to say, the "motor-phase regulator-generator" three-in-one motor 91 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 the location and quantity of the shared mechanical equipment and electrical equipment can be determined according to the power and speed of each section of the compressor unit 3 and the expander unit 4.

[0062] Regarding the operation of the "motor-phase-converter-generator" three-in-one motor 91, specifically, when the first clutch 92 is in a connected state and the second clutch 93 is in a disconnected state, the second output shaft of the "motor-phase-converter-generator" three-in-one motor 91 is connected to the compressor unit 3, which can drive the compressor unit 3 to operate, and at this time, the air or nitrogen or carbon dioxide compression energy storage process is carried out. When the first clutch 92 is in a disconnected state and the second clutch 93 is in a connected state, the second input shaft of the "motor-phase-converter-generator" three-in-one motor 91 is connected to the expansion unit 4, which can drive the expansion unit 4 to operate and generate electricity, and at this time, the air or nitrogen or carbon dioxide expansion energy release power generation process is carried out.

[0063] The specific working principles of the "motor-phase regulator-generator" three-in-one motor 91, the expansion unit 4 and the compressor unit 3 can refer to the description of the relevant technology, and will not be described in detail in this embodiment.

[0064] Reference Figure 1 As shown, in some embodiments, the new pressure storage system and wind-solar storage and transmission integrated structure system based on the Shagohuang clean energy base also includes a buffer tank 94, the input end of the buffer tank 94 is connected to the output end of the compressor unit 3 through a first regulating valve 95, and the output end of the buffer tank 94 is connected to the input end of the compressor unit 3 through a second regulating valve 96.

[0065] The alpine horizontal gas storage reservoir 7 is connected to the output end of the first regulating valve 95 and the input end of the second regulating valve 96 through the third regulating valve 97 respectively.

[0066] In this embodiment, the buffer tank 94 can be used to compress the air, nitrogen or carbon dioxide into liquid state or store it in sub- / trans- / supercritical state. The system efficiency can be significantly improved by storing the compressed air, nitrogen or carbon dioxide in liquid state or sub- / trans- / supercritical state; the specific gas storage state of the pressure storage system can be flexibly selected according to the power and duration of the wind farm or off-peak electricity required to store electric energy.

[0067] Exemplarily, the first regulating valve 95 , the second regulating valve 96 , and the third regulating valve 97 may all be three-way valves.

[0068] Reference Figure 1 As shown, in some embodiments, a cold storage heat exchanger 98 is shared between the first regulating valve 95 and the input end of the buffer tank 94, and between the second regulating valve 96 and the output end of the buffer tank 94. A pressure reducing device 981 is provided between the cold storage heat exchanger 98 and the input end of the buffer tank 94; a pressure increasing device 982 is provided between the cold storage heat exchanger 98 and the output end of the buffer tank 94.

[0069] In the energy storage process, the cold energy stored in the cold storage heat exchanger 98 is used to cool and liquefy the compressed air, nitrogen or carbon dioxide at equal pressure, and then is stored at normal pressure in the alpine horizontal gas storage reservoir 7 after being depressurized by the depressurization device 981. In the energy release process, the cold storage heat exchanger 98 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.

[0070] Reference Figure 1 As shown, in some embodiments, a shared heat exchanger 99 is provided between the compressor unit 3 and the expansion unit 4 .

[0071] Specifically, the cost of the heat storage and heat exchange subsystem can be reduced by allowing the compressor unit 3 and the expansion unit 4 to share the heat exchanger 99. The configurations of the compressor unit 3 and the expansion unit 4 are different in different application scenarios, and the location and number of the shared heat exchanger 99 can be arranged according to the temperature difference and pressure difference of the matching heat exchanger.

[0072] 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.

[0073] 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, solar, storage and transmission integrated structure based on Shagohuang clean energy base, characterized in that: It comprises a wind power generator set (1), a photovoltaic thermal generator set (2), a compressor set (3), an expansion unit (4), an on-site load tower (5) and a central load tower (6); The wind turbine generator set (1) and the local load tower (5) are both arranged on a high mountain (8); the central load tower (6) and the photovoltaic thermal generator set (2) are both located on land and the central load tower (6) is connected to the photovoltaic thermal generator set (2); the wind turbine generator set (1) is respectively connected to the local load tower (5) and the input end of the compressor set (3); the output end of the compressor set (3) is connected to the input end of the expansion unit (4); and the output end of the expansion unit (4) is connected to the central load tower (6); A high mountain transverse gas storage reservoir (7) is arranged on the high mountain (8), the input end of the high mountain transverse gas storage reservoir (7) is connected to the output end of the compressor unit (3), and the output end of the high mountain transverse gas storage reservoir (7) is connected to the input end of the compressor unit (3).

2. The new pressure storage system and wind-solar-storage-transmission integrated structure based on the Shagohuang clean energy base according to claim 1 is characterized in that: The cross section of the high mountain horizontal gas storage (7) is circular, elliptical or trapezoidal.

3. The new pressure storage system and wind, solar, storage and transmission integrated structure based on the Shagohuang clean energy base according to claim 2 is characterized in that: When the cross-section of the high mountain horizontal gas storage reservoir (7) is circular, elliptical or trapezoidal, the diameter of the high mountain horizontal gas storage reservoir (7) is not less than 30 m; and / or the cross-sectional area of ​​the high mountain horizontal gas storage reservoir (7) is not less than 700 m2.

4. The new pressure storage system and wind-solar-storage-transmission integrated structure based on the Shagohuang clean energy base according to claim 1 is characterized in that: The photovoltaic thermal unit (2) comprises a photovoltaic generator (21) and a photothermal generator (22), and the output end of the photovoltaic generator (21) and the output end of the photothermal generator (22) are both connected to the central load tower (6).

5. The new pressure storage system and wind, solar, storage and transmission integrated structure based on the Shagohuang clean energy base according to claim 1 is characterized in that: The central load tower (6) comprises a first load tower (61) and a second load tower (62) connected to the first load tower (61), wherein the first load tower (61) is respectively connected to the output end of the photovoltaic thermal unit (2) and the output end of the expansion unit (4).

6. The new pressure storage system and wind, solar, storage and transmission integrated structure based on the Shagohuang clean energy base according to claim 1 is characterized in that: The local load tower (5) is arranged on the leeward side of the high mountain (8).

7. The novel pressure storage system and wind-solar-storage-transmission integrated structure based on the Shagohuang clean energy base according to any one of claims 1 to 6 is characterized in that: The compressor unit (3) and the expansion unit (4) are connected via a "motor-phase regulator-generator" three-in-one motor (91), and the compressor unit (3) and the expansion unit (4) are coaxially arranged; A first clutch (92) is provided between the three-in-one motor (91) and the compressor unit (3), and a second clutch (93) is provided between the three-in-one motor (91) and the expansion unit (4).

8. The novel pressure storage system and wind-solar-storage-transmission integrated structure based on the Shagohuang clean energy base according to any one of claims 1 to 6 is characterized in that: It also comprises a buffer tank (94), the input end of the buffer tank (94) being connected to the output end of the compressor unit (3) through a first regulating valve (95), and the output end of the buffer tank (94) being connected to the input end of the compressor unit (3) through a second regulating valve (96); The alpine horizontal gas storage reservoir (7) is connected to the output end of the first regulating valve (95) and the input end of the second regulating valve (96) respectively through a third regulating valve (97).

9. The new pressure storage system and wind, solar, storage and transmission integrated structure based on the Shagohuang clean energy base according to claim 8 is characterized in that: A cold storage heat exchanger (98) is shared between the first regulating valve (95) and the input end of the buffer tank (94), and between the second regulating valve (96) and the output end of the buffer tank (94); A pressure reducing device (981) is provided between the cold storage heat exchanger (98) and the input end of the buffer tank (94); A pressure boosting device (982) is provided between the cold storage heat exchanger (98) and the output end of the buffer tank (94).

10. The novel pressure storage system and wind-solar-storage-transmission integrated structure based on the Shagohuang clean energy base according to any one of claims 1 to 6, characterized in that: A common heat exchanger (99) is provided between the compressor unit (3) and the expansion unit (4).

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