Gravity energy storage method for emergency standby power supply of high-rise commercial building

Abstract

The invention discloses a high-rise commercial building. The top layer of the high-rise commercial building is provided with an upper warehouse stacking area used for stacking heavy blocks, and the bottom layer of the high-rise commercial building is provided with a lower warehouse stacking area used for stacking heavy blocks. The energy storage method comprises the following steps that during energy storage, gravity blocks in a lower garage stacking area are moved to a lifting device through a lower garage translation device, the lifting device lifts the gravity blocks to the top layer of the commercial building, and an upper garage translation device transfers the gravity blocks in the lifting device to an upper garage stacking area; when power is cut off, the weight block in the upper garage stacking area is transferred to the lifting device through the upper garage translation device, the weight block descends to the bottom layer, a rope of the lifting device is in transmission connection with a rotor shaft of the generator, the generator is driven to generate electricity, and the generator supplies power to an emergency power supply system of the high-rise commercial building. Through the conversion of electric energy-potential energy-electric energy, the characteristics of long endurance, zero carbon emission and high safety of gravity energy storage are utilized, and the stable power utilization requirement of the high-rise building is met.

Description

Technical Field

[0001] This invention relates to energy storage methods, and in particular to a gravity energy storage method for emergency backup power in high-rise commercial buildings. Background Technology

[0002] High-rise commercial buildings, as an important component of modern cities, place extremely high demands on the continuity and reliability of power supply due to their complex functions, high population density, and numerous equipment. With the acceleration of urbanization and the continuous increase in building height, the scale and functions of high-rise commercial buildings are becoming increasingly diversified, leading to a stronger reliance on backup power systems. In the modern commercial environment, power outages not only cause economic losses but can also threaten the lives of people. Therefore, the scientific and rational design of emergency backup power systems has become a crucial aspect of the construction and operation of high-rise commercial buildings.

[0003] High-rise commercial buildings must consider backup power supply, which is determined by their building characteristics, population density, equipment importance, and relevant regulatory requirements.

[0004] 1. Personnel safety and evacuation requirements

[0005] High-rise commercial buildings (such as office buildings, shopping malls, and hotels) are typically densely populated with long vertical evacuation routes (relying on elevators, staircases, etc.). When the mains power suddenly fails: emergency lighting and evacuation guidance systems must be activated immediately to guide people to safety and prevent stampedes due to darkness; fire elevators, smoke extraction systems, and other fire-fighting equipment must continue operating to ensure unobstructed fire rescue routes and prevent the spread of smoke. Without backup power, the failure of these critical systems will significantly increase safety risks.

[0006] 2. Continuous operation requirements of critical equipment

[0007] High-rise commercial buildings contain a large number of indispensable devices:

[0008] Firefighting equipment, such as automatic fire alarm systems, sprinkler pumps, and fire hydrant pumps, must be kept running during a fire, otherwise the fire may get out of control.

[0009] Essential life support equipment includes water pumps (to maintain water supply in high-rise buildings), elevators (especially medical elevators and freight elevators), and ventilation systems (to maintain air circulation). Power outages will affect people's normal activities and may even cause panic.

[0010] Data and communication equipment: shopping mall POS systems, office building servers, security monitoring systems, etc. Power outages may lead to data loss, interruption of business transactions, or security vulnerabilities.

[0011] 3. Business Operations and Service Continuity

[0012] As profit-making venues, high-rise commercial buildings must ensure both customer experience and operational efficiency.

[0013] Power outages in shopping malls can lead to customer loss, product damage (such as the shutdown of cold chain equipment), and even legal disputes; power outages in office buildings can affect office efficiency and cause direct economic losses to companies in the financial and technology sectors that are highly dependent on electricity; power outages in hotels may lead to customer complaints and damage to their brand image.

[0014] Backup power supplies can ensure that critical business equipment (such as cash registers, central air conditioning, and front desk systems) can continue to operate temporarily during power outages, buying time for emergency response. Summary of the Invention

[0015] The purpose of this invention is to provide a gravity energy storage method for emergency backup power in high-rise commercial buildings. By converting "electrical energy-potential energy-electrical energy", the method utilizes the characteristics of gravity energy storage, such as "long-duration operation, zero carbon emissions, and high safety", to meet the stable power demand of high-rise buildings. It has the advantages of safety, reliability, economy, and environmental protection, and can provide strong support for the safe operation and sustainable development of high-rise commercial buildings.

[0016] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0017] The high-rise commercial building has an upper storage area on the top floor for stacking gravity blocks, and a lower storage area on the ground floor for stacking gravity blocks. The high-rise commercial building includes: a lifting device connected to mains power for lifting gravity blocks from the ground floor to the top floor, or transferring gravity blocks from the top floor to the ground floor; a generator whose output is electrically connected to the building's emergency power supply system; an upper storage transfer device connected to the building's backup power supply, used to move gravity blocks from the lifting device to the upper storage area when energy is stored, and to transfer gravity blocks from the upper storage area to the lifting device when power is lost; and a lower storage transfer device connected to the building's backup power supply, used to move gravity blocks from the lower storage area to the lifting device when energy is stored, and to move gravity blocks from the lifting device to the lower storage area when power is lost.

[0018] This energy storage method includes the following:

[0019] During energy storage, the gravity blocks in the lower storage loading area are moved to the lifting device by the lower storage translation device. The lifting device then lifts the gravity blocks to the top floor of the commercial building. The upper storage translation device then transfers the gravity blocks in the lifting device to the upper storage loading area.

[0020] In the event of a power outage, the weight blocks in the upper storage area are transferred to the lifting device via the upper storage horizontal transfer device. The weight blocks then descend to the bottom floor. The ropes of the lifting device are connected to the rotor shaft of the generator, which drives the generator to generate electricity. The generator supplies power to the emergency power supply system of the high-rise commercial building.

[0021] In the aforementioned gravity energy storage method for emergency backup power supply of high-rise commercial buildings, the height of the high-rise commercial building is greater than or equal to 100 meters, the load of the emergency backup power supply is 33% of the total load of the high-rise commercial building, and the gravity blocks in the upper storage area can drive the generator to generate electricity, providing power to the emergency power supply system of the high-rise commercial building for at least 15 minutes.

[0022] In the aforementioned gravity energy storage method for emergency backup power in high-rise commercial buildings, the number of lifting devices is greater than or equal to 16. The gravity blocks in the upper storage area are used by 16 lifting devices. Each lifting device drives a generator to generate electricity. The gravity blocks in the upper storage area can drive each generator to generate 4.5MW / 1.125MWh of power.

[0023] In the aforementioned gravity energy storage method for emergency backup power in high-rise commercial buildings, the generator model is 1FC6404-6LA42, which is a 4MVA / 10kV synchronous generator; the generator power is 3.825MW; the generator is equipped with a 10:1 gearbox and an AVR excitation system.

[0024] In the aforementioned gravity energy storage method for emergency backup power in high-rise commercial buildings, the car running speed of the lifting device is 2 meters per second; the gravity block is 16t / block, and the number of gravity blocks is 260; the upper and lower warehouse translation devices are RGV trolleys and track systems.

[0025] In the aforementioned gravity energy storage method for emergency backup power in high-rise commercial buildings, the bottom three floors of the high-rise commercial building have a lower storage loading area. The reinforced concrete structural materials of the high-rise commercial building are C80 concrete support columns, C40 concrete support beams and floor slabs, and HRB400 steel bars. The dimensions of the support columns are 0.80 meters * 0.80 meters; the dimensions of the support beams are 0.50 meters * 0.70 meters; the thickness of the tube shear wall is 0.5 meters, and the thickness of the floor slab is 0.2 meters.

[0026] The aforementioned gravity energy storage method for emergency backup power in high-rise commercial buildings further includes the following: charging during off-peak electricity price periods and discharging during peak electricity price periods, thereby reducing electricity costs by utilizing the peak-valley price difference.

[0027] Compared with existing technologies, this invention utilizes the characteristics of gravity energy storage—long-duration operation, zero carbon emissions, and high safety—through the conversion of "electrical energy-potential energy-electrical energy," adapting to the stable power demand of high-rise buildings. It has advantages such as safety, reliability, economy, and environmental protection, and can provide strong support for the safe operation and sustainable development of high-rise commercial buildings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the energy storage process;

[0030] Figure 3 This is a schematic diagram of the process under power failure conditions;

[0031] Figure 4 This is a top-view diagram showing the layout of the lifting device;

[0032] Figure 5 This is a sectional view of the arrangement of the lifting device.

[0033] Attached reference numerals: 1-Upper storage area, 2-Lifting device, 3-Car, 4-Lower storage area, 5-Lower storage horizontal movement device, 6-Gravity block, 7-Upper storage horizontal movement device.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0035] Embodiment 1 of the present invention: A gravity energy storage method for emergency backup power in high-rise commercial buildings, wherein the top floor of the high-rise commercial building has an upper storage area 1 for storing gravity blocks 6, and the bottom floor of the high-rise commercial building has a lower storage area 4 for storing gravity blocks 6; the high-rise commercial building includes: a lifting device 2, which is connected to the mains power and is used to lift the gravity blocks 6 from the bottom floor of the high-rise commercial building to the top floor of the high-rise commercial building; or to transfer the gravity blocks 6 from the top floor of the high-rise commercial building to the bottom floor of the high-rise commercial building; a generator, the output terminal of the generator and the high-rise commercial building... The emergency power supply system of the high-rise commercial building is electrically connected, and the generator supplies power to the emergency power supply system of the high-rise commercial building; the upper warehouse transfer device 7 is connected to the backup power supply of the high-rise commercial building. When storing energy, it is used to move the gravity block 6 on the lifting device 2 to the upper warehouse loading area 1. When the power is cut off, it is used to transfer the gravity block 6 in the upper warehouse loading area 1 to the lifting device; the lower warehouse transfer device 5 is connected to the backup power supply of the high-rise commercial building. When storing energy, it is used to move the gravity block 6 from the lower warehouse loading area 4 to the lifting device 2. When the power is cut off, it is used to move the gravity block 6 on the lifting device to the lower warehouse loading area 4.

[0036] This energy storage method includes the following:

[0037] During energy storage, the gravity block 6 in the lower storage loading area 4 is moved to the lifting device 2 by the lower storage translation device 5. The lifting device 2 lifts the gravity block 6 to the top floor of the commercial building. The upper storage translation device 7 transfers the gravity block 6 in the lifting device 2 to the upper storage loading area 1.

[0038] In the event of a power outage, the weight blocks in the upper storage area 1 are transferred to the lifting device 2 via the upper storage transfer device 7. The gravity blocks 6 then descend to the bottom floor. The ropes of the lifting device 2 are connected to the rotor shaft of the generator, driving the generator to generate electricity. The generator supplies power to the emergency power supply system of the high-rise commercial building. If the power grid fails and a power outage occurs, the AI ​​dispatch platform immediately triggers the emergency mode. The gravity blocks fall rapidly to generate electricity, and the UPS system switches to emergency power supply within 0.5 seconds. This provides continuous power for emergency lighting and evacuation guidance systems, fire elevators, smoke extraction systems, automatic fire alarm systems, sprinkler pumps, fire hydrant pumps, and other fire-fighting equipment; for water pumps, elevators, and other living support equipment; and for data and communication equipment such as the POS system, servers, and security monitoring systems for 15 minutes until the power grid is restored.

[0039] Example 2: A gravity energy storage method for emergency backup power in high-rise commercial buildings. The top floor of the high-rise commercial building has an upper storage area 1 for storing gravity blocks 6, and the bottom floor has a lower storage area 4 for storing gravity blocks 6. The high-rise commercial building includes: a lifting device 2 connected to mains power for lifting gravity blocks 6 from the bottom floor to the top floor; or transferring gravity blocks 6 from the top floor to the bottom floor; a generator; and the generator's output terminal and the high-rise commercial building... The emergency power supply system of the high-rise commercial building is electrically connected, and the generator supplies power to the emergency power supply system of the high-rise commercial building; the upper warehouse transfer device 7 is connected to the backup power supply of the high-rise commercial building. When storing energy, it is used to move the gravity block 6 on the lifting device 2 to the upper warehouse loading area 1. When the power is cut off, it is used to transfer the gravity block 6 in the upper warehouse loading area 1 to the lifting device; the lower warehouse transfer device 5 is connected to the backup power supply of the high-rise commercial building. When storing energy, it is used to move the gravity block 6 from the lower warehouse loading area 4 to the lifting device 2. When the power is cut off, it is used to move the gravity block 6 on the lifting device to the lower warehouse loading area 4.

[0040] This energy storage method includes the following:

[0041] During energy storage, the gravity block 6 in the lower storage loading area 4 is moved to the lifting device 2 by the lower storage translation device 5. The lifting device 2 lifts the gravity block 6 to the top floor of the commercial building. The upper storage translation device 7 transfers the gravity block 6 in the lifting device 2 to the upper storage loading area 1.

[0042] In the event of a power outage, the weight blocks in the upper storage area 1 are transferred to the lifting device 2 via the upper storage transfer device 7. The gravity blocks 6 then descend to the bottom floor. The ropes of the lifting device 2 are connected to the rotor shaft of the generator, driving the generator to generate electricity. The generator supplies power to the emergency power supply system of the high-rise commercial building. If the power grid fails and a power outage occurs, the AI ​​dispatch platform immediately triggers the emergency mode. The gravity blocks fall rapidly to generate electricity, and the UPS system switches to emergency power supply within 0.5 seconds. This provides continuous power for emergency lighting and evacuation guidance systems, fire elevators, smoke extraction systems, automatic fire alarm systems, sprinkler pumps, fire hydrant pumps, and other fire-fighting equipment; for water pumps, elevators, and other living support equipment; and for data and communication equipment such as the POS system, servers, and security monitoring systems for 15 minutes until the power grid is restored.

[0043] To reduce operating costs, this energy storage method also includes the following: charging during off-peak hours and discharging during peak hours, utilizing the peak-valley price difference to reduce electricity expenses.

[0044] For high-rise commercial buildings with a height greater than or equal to 100 meters, the emergency backup power supply load is 33% of the total load of the high-rise commercial building. The gravity block 6 within the upper storage area 1 can drive a generator to generate electricity, providing power to the emergency power supply system of the high-rise commercial building for at least 15 minutes. In this embodiment, the external dimensions of the high-rise commercial building are: 67.2 (length) x 75.6 (width) x 100.8 (height); the total electrical load is 15000KW, and the emergency backup power supply is designed based on 33% of the load, approximately 5000KW; the emergency power supply time is 15 minutes.

[0045] The number of lifting devices is greater than or equal to 16. Gravity blocks 6 within the upper storage area 1 supply power to these 16 lifting devices. Each lifting device drives a generator, and the single-generator power and capacity of each generator within the upper storage area 1 is 4.5MW / 1.125MWh. The energy storage system capacity is 5MW / 1.25MWh, with an efficiency of 85% and a storage time of 0.2 hours.

[0046] The generator is model 1FC6404-6LA42, a 4MVA / 10kV synchronous generator; the generator power is 3.825MW; the generator is equipped with a 10:1 gearbox and an AVR excitation system.

[0047] The car 3 of the lifting device 2 runs at a speed of 2 meters per second; the gravity block 6 is 616t / block, and there are 260 gravity blocks. The material of the gravity blocks is selected and designed according to the conditions of the construction site; the upper warehouse translation device 7 and the lower warehouse translation device 5 are RGV trolleys and track systems.

[0048] Example 3: A gravity energy storage method for emergency backup power in high-rise commercial buildings. The top floor of the high-rise commercial building has an upper storage area 1 for storing gravity blocks 6, and the bottom floor has a lower storage area 4 for storing gravity blocks 6. The high-rise commercial building includes: a lifting device 2 connected to mains power for lifting gravity blocks 6 from the bottom floor to the top floor; or transferring gravity blocks 6 from the top floor to the bottom floor; a generator; and the generator's output terminal and the high-rise commercial building... The emergency power supply system of the high-rise commercial building is electrically connected, and the generator supplies power to the emergency power supply system of the high-rise commercial building; the upper warehouse transfer device 7 is connected to the backup power supply of the high-rise commercial building. When storing energy, it is used to move the gravity block 6 on the lifting device 2 to the upper warehouse loading area 1. When the power is cut off, it is used to transfer the gravity block 6 in the upper warehouse loading area 1 to the lifting device; the lower warehouse transfer device 5 is connected to the backup power supply of the high-rise commercial building. When storing energy, it is used to move the gravity block 6 from the lower warehouse loading area 4 to the lifting device 2. When the power is cut off, it is used to move the gravity block 6 on the lifting device to the lower warehouse loading area 4.

[0049] This energy storage method includes the following:

[0050] During energy storage, the gravity block 6 in the lower storage loading area 4 is moved to the lifting device 2 by the lower storage translation device 5. The lifting device 2 lifts the gravity block 6 to the top floor of the commercial building. The upper storage translation device 7 transfers the gravity block 6 in the lifting device 2 to the upper storage loading area 1.

[0051] In the event of a power outage, the weight blocks in the upper storage area 1 are transferred to the lifting device 2 via the upper storage transfer device 7. The gravity blocks 6 then descend to the bottom floor. The ropes of the lifting device 2 are connected to the rotor shaft of the generator, driving the generator to generate electricity. The generator supplies power to the emergency power supply system of the high-rise commercial building. If the power grid fails and a power outage occurs, the AI ​​dispatch platform immediately triggers the emergency mode. The gravity blocks fall rapidly to generate electricity, and the UPS system switches to emergency power supply within 0.5 seconds. This provides continuous power for emergency lighting and evacuation guidance systems, fire elevators, smoke extraction systems, automatic fire alarm systems, sprinkler pumps, fire hydrant pumps, and other fire-fighting equipment; for water pumps, elevators, and other living support equipment; and for data and communication equipment such as the POS system, servers, and security monitoring systems for 15 minutes until the power grid is restored.

[0052] To reduce operating costs, this energy storage method also includes the following: charging during off-peak hours and discharging during peak hours, utilizing the peak-valley price difference to reduce electricity expenses.

[0053] For high-rise commercial buildings with a height greater than or equal to 100 meters, the emergency backup power supply load is 33% of the total load of the high-rise commercial building. The gravity block 6 within the upper storage area 1 can drive a generator to generate electricity, providing power to the emergency power supply system of the high-rise commercial building for at least 15 minutes. In this embodiment, the external dimensions of the high-rise commercial building are: 67.2 (length) x 75.6 (width) x 100.8 (height); the total electrical load is 15000KW, and the emergency backup power supply is designed based on 33% of the load, approximately 5000KW; the emergency power supply time is 15 minutes.

[0054] The number of lifting devices is greater than or equal to 16. Gravity blocks 6 within the upper storage area 1 supply power to these 16 lifting devices. Each lifting device drives a generator, and the single-generator power and capacity of each generator within the upper storage area 1 is 4.5MW / 1.125MWh. The energy storage system capacity is 5MW / 1.25MWh, with an efficiency of 85% and a storage time of 0.2 hours.

[0055] The generator is model 1FC6404-6LA42, a 4MVA / 10kV synchronous generator; the generator power is 3.825MW; the generator is equipped with a 10:1 gearbox and an AVR excitation system.

[0056] The car 3 of the lifting device 2 runs at a speed of 2 meters per second; the gravity block 6 is 616t / block, and there are 260 gravity blocks. The material of the gravity blocks is selected and designed according to the conditions of the construction site; the upper warehouse translation device 7 and the lower warehouse translation device 5 are RGV trolleys and track systems.

[0057] Specifically, the high-rise commercial building has external dimensions of 67.2m x 75.6m x 100.8m (H), comprising 31 floors in total: 28 floors above ground (each floor is 3.6 meters high, with floors 1-3 being shopping malls, floors 4-27 being office buildings, and floor 28 being the upper storage area and equipment rooms), and 3 floors underground (each floor is 4.5 meters high, with the first basement level being a supermarket, the second basement level being a parking garage, and the third basement level being the lower storage area, generator rooms, and winch rooms). Eight elevators and one scissor staircase are arranged in the core. The gravity energy storage system's spatial areas consist of a power generation area, equipment area, elevator area, waiting area, maintenance area, monitoring room, machine room, power distribution room, elevator area, upper storage area, and lower storage area.

[0058] The lowest three floors of the high-rise commercial building have a lower storage area 4. The reinforced concrete structural materials of the high-rise commercial building are C80 concrete support columns, C40 concrete support beams and floor slabs, and HRB400 steel bars; the dimensions of the support columns are 0.80m * 0.80m; the dimensions of the support beams are 0.50m * 0.70m; the thickness of the tube shear wall is 0.5m, and the thickness of the floor slab is 0.2m.

Claims

1. A gravity energy storage method for emergency backup power in high-rise commercial buildings, characterized in that, The top floor of the high-rise commercial building has an upper storage area (1) for accumulating gravity blocks (6), and the bottom floor of the high-rise commercial building has a lower storage area (4) for accumulating gravity blocks (6). The high-rise commercial building includes a lifting device (2), which is connected to the mains power and is used to lift the gravity block (6) from the bottom floor to the top floor of the high-rise commercial building. Or the gravity block (6) may be moved from the top floor of the high-rise commercial building to the bottom floor of the high-rise commercial building; The generator's output is electrically connected to the emergency power supply system of the high-rise commercial building, and the generator supplies power to the emergency power supply system of the high-rise commercial building. The upper warehouse translation device (7) is connected to the backup power supply of the high-rise commercial building. When storing energy, it is used to move the gravity block (6) on the lifting device (2) to the upper warehouse stacking area (1). When the power is cut off, it is used to transfer the gravity block (6) in the upper warehouse stacking area (1) to the lifting device. The lower warehouse translation device (5) is connected to the backup power supply of the high-rise commercial building. When storing energy, it is used to move the gravity block (6) from the lower warehouse stacking area (4) to the lifting device (2). When the power is off, it is used to move the gravity block (6) on the lifting device to the lower warehouse stacking area (4). This energy storage method includes the following: During energy storage, the gravity block (6) in the lower storage loading area (4) is moved to the lifting device (2) by the lower storage translation device (5), the lifting device (2) lifts the gravity block (6) to the top floor of the commercial building, and the upper storage translation device (7) transfers the gravity block (6) in the lifting device (2) to the upper storage loading area (1). When the power is off, the weight block of the upper storage area (1) is transferred to the lifting device (2) by the upper storage transfer device (7), and the gravity block (6) is lowered to the bottom. The rope of the lifting device (2) is connected to the rotor shaft of the generator to drive the generator to generate electricity. The generator supplies power to the emergency power supply system of the high-rise commercial building.

2. The gravity energy storage method for emergency backup power in high-rise commercial buildings according to claim 1, characterized in that, The height of the high-rise commercial building is greater than or equal to 100 meters. The load of the emergency backup power supply is 33% of the total load of the high-rise commercial building. The gravity block (6) in the upper storage area (1) can drive the generator to generate electricity, and provide power to the emergency power supply system of the high-rise commercial building for at least 15 minutes.

3. A gravity energy storage method for emergency backup power in high-rise commercial buildings according to claim 1, characterized in that, The number of lifting devices is greater than or equal to 16. The gravity block (6) in the upper storage area (1) is used by 16 lifting devices. Each lifting device drives a generator to generate electricity. The gravity block (6) in the upper storage area (1) can drive each generator to generate electricity with a single generator power and capacity of 4.5MW / 1.125MWh.

4. A gravity energy storage method for emergency backup power in high-rise commercial buildings according to claim 1, characterized in that, The generator is model 1FC6404-6LA42, a 4MVA / 10kV synchronous generator; the generator power is 3.825MW; the generator is equipped with a 10:1 gearbox and an AVR excitation system.

5. A gravity energy storage method for emergency backup power in high-rise commercial buildings according to claim 1, characterized in that, The car (3) of the lifting device (2) runs at a speed of 2 meters per second; the gravity block (6) is 16t / block, and the number of gravity blocks (6) is 260. The upper warehouse translation device (7) and the lower warehouse translation device (5) are RGV trolleys and track systems.

6. A gravity energy storage method for emergency backup power in high-rise commercial buildings according to claim 1, characterized in that, The three lowest floors of the high-rise commercial building have a lower storage area (4). The reinforced concrete structural materials of the high-rise commercial building are C80 concrete support columns, C40 concrete support beams and floor slabs, and HRB400 steel bars. The dimensions of the support columns are 0.80m*0.80m. The dimensions of the support beams are 0.50m*0.70m. The thickness of the tube shear wall is 0.5m and the thickness of the floor slab is 0.2m.

7. A gravity energy storage method for emergency backup power in high-rise commercial buildings according to claim 1, characterized in that, This energy storage method also includes charging during off-peak hours and discharging during peak hours, utilizing the peak-valley price difference to reduce electricity costs.

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