Peak regulation and energy storage mechanism for smart energy system

Abstract

The invention relates to the technical field of power equipment, in particular to a peak regulation energy storage mechanism for a smart energy system. Comprising a water tower, a bearing plate connected with the inner wall of the water tower in a sliding mode, a water inlet pipe used for injecting water into an inner cavity of the water tower, a water outlet pipe used for guiding water in the water tower to a power generator and an elastic mechanism arranged below the bearing plate so that the bearing plate can be elastically connected with the inner bottom wall of the water tower. The upper end of the water inlet pipe and the upper end of the water outlet pipe are both located above the bearing plate, a water inlet valve is arranged on the water inlet pipe, and a water outlet valve is arranged on the water outlet pipe. Under the action of the elastic mechanism, the bearing plate begins to slide downwards at a constant speed to keep the height of the horizontal plane in the water tower unchanged. When the energy storage mechanism in the scheme releases energy, the output power of the generator is stable, and the regulation and control difficulty during grid connection of the output electric energy of the generator is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a peak-shaving energy storage mechanism for a smart energy system. Background Art

[0002] Smart energy system is a system that integrates geothermal energy, solar energy, air energy, water energy, natural gas, urban tap water, sewage, industrial waste water and waste heat, and other renewable energy sources. It uses new technologies such as cold and heat recovery, energy storage, heat balance, and intelligent control to intelligently balance various energy flows, so as to achieve the recycling of energy, and integrates various functions such as refrigeration and heating, hot water, refrigeration and freezing, drying and heating, breeding and breeding, snow and ice removal, steam, and power generation. Peak regulation, energy storage, and intelligent scheduling of the power grid are also important management contents of the smart energy system. It uses electricity to be converted into other storable energy forms and stored during low electricity consumption. During peak electricity consumption, the stored energy is used to generate electricity to supply power to the power grid. Pumped storage technology is a commonly used peak-shaving energy storage measure for electricity. This technology is achieved by building a pumped storage power station. The pumped storage power station has an upper reservoir and a lower reservoir. The upper reservoir is built at a higher position than the lower reservoir, and a water pump and a turbine unit are respectively provided between the upper reservoir and the lower reservoir. When electricity consumption is low, the motor drives the water pump to pump water from the lower reservoir to the upper reservoir, converting electrical energy into potential energy and storing it; when electricity consumption is high, the valve of the upper reservoir is opened, and the water stored in the upper reservoir flows to the lower reservoir. The water flow drives the turbine to rotate, converting potential energy into electrical energy and providing electricity to the electricity user. Pumped-storage power stations have high requirements for site selection conditions such as topography and geology. Due to geographical restrictions, many hydropower stations are often unable to build upper reservoirs for energy storage, which restricts the effective management of power peak-shaving and energy storage by smart energy systems.

[0003] In order to solve the above problems, the prior art with announcement number CN 109881956 B discloses a novel pumped energy storage device, which includes: a container wall, an additional counterweight, a large piston, an O-type piston sealing ring, a waterproof wall, an inlet pipe port, an outlet pipe port, a first valve, and a second valve. When the electricity consumption is low, the off-peak electricity drives the hydraulic pump through the electric motor to add the filtered water into the energy storage tank from the inlet pipe port. In the energy storage tank, the filtered water lifts the large piston to store potential energy, and the stored potential energy is adjusted by the additional counterweight; when the electricity consumption is peak, the large piston and the additional counterweight press the water in the energy storage tank out of the outlet pipe port under the action of gravity, and the pressed water flow drives the turbine to generate electricity, converting the potential energy into electrical energy, thereby solving the problem that the pumped energy storage power station cannot be built due to geographical restrictions. However, the above-mentioned prior art has high requirements for pumping equipment. Since the pumping equipment needs to generate high water pressure in order to inject high-pressure water into the container wall and lift the large piston upward to store energy through the water pressure, the pumping equipment has high requirements. At the same time, in this scheme, when the water body is released to generate electricity for the turbine, since the water surface height and the height of the large piston are in a constantly changing state, the impact force of the water flow on the turbine also changes constantly, and the water flow rate and pressure at the lower end of the outlet pipe are unstable, resulting in unstable electric energy output by the turbine, which increases the difficulty of regulation when the electricity is connected to the grid. Summary of the invention

[0004] In view of the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: to provide a peak-shaving energy storage mechanism for a smart energy system, so as to solve the problems existing in the above-mentioned prior art, such as high requirements for pumping equipment, unstable water flow rate and pressure when generating electricity using the stored water, resulting in unstable electric energy output by the turbine, and increased difficulty in regulation when connecting electricity to the grid.

[0005] To solve the above technical problems, a technical solution adopted by the present invention is: a peak-shaving energy storage mechanism for a smart energy system, comprising a water tower, a supporting plate slidably connected to the inner wall of the water tower, a water inlet pipe for injecting water into the inner cavity of the water tower, a water outlet pipe for guiding the water in the water tower to a generator, and an elastic mechanism arranged below the supporting plate to elastically connect the supporting plate to the inner bottom wall of the water tower. The water tower is arranged at a position higher than the altitude of a power station reservoir, the upper end of the water inlet pipe and the upper end of the water outlet pipe are both located above the supporting plate, an inlet valve is arranged on the water inlet pipe, and a water outlet valve is arranged on the water outlet pipe. When water is continuously injected into the inner cavity of the water tower above the supporting plate through the water inlet pipe so that the horizontal plane exceeds the upper end of the water outlet pipe by a certain distance, the supporting plate begins to slide down at a uniform speed under the action of the elastic mechanism so that the height of the horizontal plane in the water tower remains unchanged.

[0006] Furthermore, the elastic mechanism includes a multi-layer spring group arranged in sequence from top to bottom and an annular plate horizontally arranged between adjacent spring groups, each of the spring groups includes a plurality of evenly distributed return springs, the return springs are arranged vertically, the upper end of each return spring in the top spring group is fixedly connected to the support plate, and the lower end is fixedly connected to the annular plate below, the upper end of each return spring in the bottom spring group is fixedly connected to the annular plate above, and the lower end is connected to the bottom wall of the water tower, the upper end of the return spring in the middle spring group is fixedly connected to the annular plate above, and the lower end is fixedly connected to the annular plate below.

[0007] Furthermore, the inner wall of the water tower is fixedly connected to a limit block, and the support plate is located below the limit block. The support plate and the limit block are in close contact so that each of the return springs is in a compressed state. When water is injected above the support plate so that the horizontal plane exceeds the upper end of the water outlet pipe by a certain distance, the support plate begins to move downward and separate from the limit block.

[0008] Furthermore, the stiffness coefficient K of the return spring is:

[0009] K=ρπr 2 gN / n

[0010] Among them, ρ is the density of the water body; r is the inner wall radius of the water tower; g is the acceleration of gravity; N is the total number of layers of the spring group; n is the number of return springs in each spring group.

[0011] Furthermore, an annular sealing plate is provided on the inner wall of the upper end of the water tower, and the annular sealing plate is sealed and fixedly connected to the inner wall of the water tower. A flexible waterproof cloth tube with openings at both ends is vertically provided between the annular sealing plate and the supporting plate, and the upper end of the flexible waterproof cloth tube is sealed and fixedly connected to the lower end surface of the annular sealing plate, and the lower end of the flexible waterproof cloth tube is sealed and fixedly connected to the edge of the upper surface of the supporting plate.

[0012] Furthermore, a guide rod is vertically arranged on the inner wall of the water tower, and guide grooves which are slidably matched with the guide rod are vertically arranged on the outer peripheral surface of the supporting plate and the outer peripheral surface of the annular plate.

[0013] Furthermore, the bottom surfaces of the support plate and each annular plate are evenly distributed with a plurality of limit columns for preventing the reset spring from being over-compressed, the upper end of the limit column is fixedly connected to the support plate or the annular plate, and the lower end of the limit column is a free end.

[0014] Furthermore, the water tower is a circular cylinder with an opening at the upper end, and an exhaust hole is provided on the lower side wall of the water tower.

[0015] The working principle of the present invention is as follows:

[0016] Close the outlet valve on the outlet pipe. During the low electricity consumption period, the water pump is driven by consuming electricity to inject water from the reservoir located lower than the water tower into the water tower through the water inlet pipe. The flexible waterproof cloth tube prevents water from leaking into the space below the support plate. Since each return spring is pre-compressed by a certain amount, when water is continuously injected into the support plate to make the horizontal plane pass a certain height above the upper end of the outlet pipe, the weight of the water above the support plate is balanced with the sum of the elastic forces of each return spring on the support plate. At this time, when water is continuously injected, the support plate begins to move downward and break away from the limit block. When there are N groups of spring groups and the influence of the weight of each annular plate on the return spring is ignored, each spring group is compressed by 1 / N unit depth after 1 unit depth of water is injected into the space above the support plate in the water tower, and the support plate slides downward by 1 unit depth, thereby maintaining the horizontal plane above the support plate at a certain height. After continuous water injection makes the limit column on the bottom annular plate contact the inner bottom wall of the water tower, stop running the water pump, close the water inlet valve on the water inlet pipe, and stop injecting water. During the peak period of electricity consumption, open the water outlet valve on the water outlet pipe, and the water in the water tower flows out through the water outlet pipe to impact the turbine installed at a low place to generate electricity to replenish energy for the power grid. When the water above the supporting plate decreases, under the elastic force of each reset spring, the supporting plate rises at a uniform speed according to the water outlet rate to keep the horizontal plane at a certain height.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. Since there is no need to use the pressure generated by the pumping equipment to lift large heavy objects upward, the pumping equipment used in this solution is simpler;

[0019] 2. In this scheme, the height of the water outlet is fixed. According to the discharge volume of the water body, each reset spring automatically matches the extension length so that the rising speed of the support plate automatically matches the drainage rate to keep the horizontal plane position unchanged, so that the water pressure and flow rate of the water outlet at the lower end of the outlet pipe are stable, and further the impact of the water flow on the generator impeller is relatively stable, thereby stabilizing the output power of the generator and reducing the difficulty of regulating the output power of the generator when it is connected to the grid;

[0020] 3. In this scheme, no matter how much water is stored each time, the water pressure and flow rate at the lower end of the outlet pipe are stable when draining water for power generation;

[0021] 4. The layered arrangement of multiple spring groups and the multi-point uniform distribution of multiple return springs in each spring group in this solution reduce the volume and length of a single return spring while meeting the needs of water storage and energy storage, and reduce the difficulty of manufacturing the return spring. The preparation feasibility of the return spring is high, and it can meet the water storage and energy storage needs of water towers of different diameters and heights;

[0022] 5. This scheme combines elastic potential energy storage with gravitational potential energy storage to stabilize the release of elastic potential energy and gravitational potential energy, making the control easy and controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 This is a schematic diagram of the main view structure of the peak-shaving energy storage mechanism used in the smart energy system of the present invention.

[0025] Figure 2 for Figure 1 Middle AA section view.

[0026] Figure 3 for Figure 1 Middle BB section view.

[0027] Figure 4 for Figure 1 Enlarged view of part A in the middle.

[0028] Figure 5 for Figure 2 Enlarged view of part B in the middle.

[0029] Figure 6 It is a schematic diagram of the structure of the peak-shaving energy storage mechanism used in the smart energy system of the present invention after storing water and energy.

[0030] The meanings of the symbols in the accompanying drawings are:

[0031] Water tower-10; annular sealing plate-101; limit block-102; guide rod-103; exhaust hole-104;

[0032] Support plate - 20;

[0033] Water inlet pipe-30; water inlet valve-301;

[0034] Water outlet pipe-40; water outlet valve-401;

[0035] Annular plate-501; Return spring-502;

[0036] Flexible waterproof fabric tube-60;

[0037] Guide groove - 70;

[0038] Limit column -80. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] A peak load storage mechanism for a smart energy system in this embodiment, such as Figure 1-Figure 6 As shown, it includes a water tower 10, a supporting plate 20 slidably connected to the inner wall of the water tower 10, a water inlet pipe 30 for injecting water into the inner cavity of the water tower 10, a water outlet pipe 40 for guiding the water in the water tower 10 to the generator, and an elastic mechanism arranged below the supporting plate 20 to elastically connect the supporting plate 20 to the inner bottom wall of the water tower 10.

[0042] The water tower 10 is arranged at a position higher than the elevation of the power station reservoir, and is used to pump water in the power station reservoir into the water tower 10 for gravity energy storage. The water tower 10 is a circular cylindrical body made of reinforced concrete with an open upper end. An exhaust hole 104 is arranged on the lower side wall of the water tower 10. An annular sealing plate 101 is arranged on the upper inner wall of the water tower 10. The annular sealing plate 101 is an annular plate body. The outer wall of the annular sealing plate 101 is sealed and fixedly connected to the upper inner wall of the water tower 10. A plurality of limit blocks 102 are evenly distributed on the inner wall of the water tower 10 below the annular sealing plate 101. The plurality of limit blocks 102 are evenly distributed on a horizontally arranged circumference, combined with Figure 2 As shown, four limit blocks 102 are evenly distributed on the inner wall of the water tower 10 in this example. In other feasible embodiments, other numbers of limit blocks 102 can be provided as needed, which are not illustrated one by one in this embodiment.

[0043] The upper end of the water inlet pipe 30 is connected to the inner cavity of the water tower 10 above the annular sealing plate 101, and the lower end of the water inlet pipe 30 is located in the water body of the power station reservoir. The water inlet pipe 30 is provided with an inlet valve 301 for closing or opening the water inlet pipe 30. The water inlet pipe 30 is provided with a water pump electrically connected to the power grid for pumping water in the power station reservoir into the inner cavity of the water tower 10 through the water inlet pipe 30. The water pump consumes electric energy from the power grid in the process of pumping water into the water tower 10. The upper end of the water outlet pipe 40 is connected to the inner cavity of the water tower 10 above the annular sealing plate 101. In the actual setting, the upper end port of the water outlet pipe 40 is set at a position lower than the upper end port of the water inlet pipe 30. The water outlet pipe 40 is provided with an outlet valve 401 for closing or opening the water outlet pipe 40. The lower end of the water outlet pipe 40 is connected to a generator located at a lower position to divert the water stored in the water tower 10 to the generator to impact the impeller of the generator for power generation, and then the electric energy output by the generator is connected to the power grid to replenish energy to the power grid.

[0044] The support plate 20 is a circular plate body that slides with the inner wall of the water tower 10. The support plate 20 is located below the limit block 102. A flexible waterproof cloth tube 60 with openings at both ends is vertically arranged between the annular sealing plate 101 and the support plate 20. The upper end of the flexible waterproof cloth tube 60 is sealed and fixedly connected to the lower end surface of the annular sealing plate 101 along the edge, and the lower end of the flexible waterproof cloth tube 60 is sealed and fixedly connected to the edge of the upper surface of the support plate 20. When the support plate 20 is located near the limit block 102, the flexible waterproof cloth tube 60 is in a folded state. When water is injected into the flexible waterproof cloth tube 60 through the water inlet pipe 30, the support plate 20 moves downward, and the flexible waterproof cloth tube 60 gradually stretches to cooperate with the downward movement of the support plate 20. The flexible waterproof cloth tube 60 prevents the water above the support plate 20 from leaking into the space below the support plate 20.

[0045] The elastic mechanism includes a multi-layer spring group arranged in sequence from top to bottom and an annular plate 501 horizontally arranged between adjacent spring groups, each of the spring groups includes a plurality of return springs 502 of the same number, the plurality of return springs 502 are evenly distributed in an annular shape, and the return springs 502 are arranged vertically. The upper end of each return spring 502 in the uppermost spring group is fixedly connected to the support plate 20, and the lower end is fixedly connected to the lower annular plate. The upper end of each return spring 502 in the lowermost spring group is fixedly connected to the upper annular plate, and the lower end is connected to the bottom wall of the water tower 10. The upper end of the return spring 502 in the middle spring group is fixedly connected to the upper annular plate 501, and the lower end is fixedly connected to the lower annular plate 501. The stiffness coefficient K of the return spring 502 is:

[0046] K=ρπr 2 gN / n

[0047] Wherein, ρ is the density of the water body; r is the inner wall radius of the water tower 10; g is the acceleration of gravity; N is the total number of layers of the spring group; and n is the number of the return springs 502 in each spring group.

[0048] In this embodiment, there are 4 layers of spring groups, each layer of spring groups is evenly distributed with 6 return springs 502, and there are 3 annular plates 501 between the 4 layers of spring groups. In other feasible embodiments, other numbers of spring groups can be set according to the height and size of the water tower 10, and other numbers of return springs 502 contained in each spring group can be determined. Examples are not given here one by one. In this embodiment, when there is no water on the top of the support plate 20, the support plate 20 and the limit block 102 are in close contact so that each of the return springs 502 is in a state of being compressed by a certain distance, so that the support plate 20 at this time is subjected to the upward elastic force of each return spring 502. When water is injected above the support plate 20 so that the horizontal plane exceeds the upper end of the outlet pipe 40 by a certain distance, the support plate 20 begins to overcome the elastic force of the return spring 502 and moves downward to leave the limit block 102 under the weight of the water.

[0049] In order to prevent the support plate 20 and the annular plates 501 from rotating when moving, in this embodiment, four uniformly distributed rectangular guide rods 103 are vertically arranged on the inner wall of the water tower 10, and guide grooves 70 that slide with the guide rods 103 are vertically arranged on the outer circumference of the support plate 20 and the outer circumference of the annular plate 501. In order to prevent the reset springs 502 from being over-extruded and plastically deformed, a plurality of limit columns 80 for preventing the reset springs 502 from being over-compressed are evenly arranged on the bottom surface of the support plate 20 and the annular plates 501. In this embodiment, the support plate 20 and the bottom surface of the annular plates 501 are evenly arranged with 6 vertically arranged limit columns 80. In other feasible embodiments, other numbers of limit columns 80 can be set according to actual needs. The upper end of the limit column 80 is fixedly connected to the adjacent support plate 20 or the annular plate 501, and the lower end of the limit column 80 is a free end.

[0050] The working principle of the present invention is as follows:

[0051] During the off-peak period of electricity consumption, the water outlet valve 401 on the water outlet pipe 40 is closed, and the water pump is driven by consuming electricity to inject water from the reservoir located lower than the water tower 10 into the water tower 10 above the support plate 20 through the water inlet pipe 30. The flexible waterproof cloth tube 60 prevents the water from leaking into the space below the support plate 20. Since each return spring 502 is pre-compressed by a certain amount, when water is continuously injected into the support plate 20 so that the water level exceeds a certain height of the upper end of the water outlet pipe 40, the weight of the water above the support plate 20 and the return springs 502 are compressed. The total elastic force of the support plate 20 is balanced. When water is continuously injected, the support plate 20 starts to move downward and away from the limit block 102. When there are N groups of spring groups and the influence of the weight of each annular plate 501 on the reset spring 502 is ignored, each spring group is compressed by 1 / N units of depth after 1 unit of water is injected into the space above the support plate 20 in the water tower 10, and the support plate 20 slides downward by 1 unit of depth, thereby maintaining the horizontal plane above the support plate 20 at a certain height. Figure 6 As shown, after continuous water injection makes the limit column 80 on the bottom annular plate 501 contact the inner bottom wall of the water tower 10, the water pump is stopped, the water inlet valve 301 on the water inlet pipe 30 is closed, and the injection of water into the water tower 10 is stopped. At this time, the horizontal plane of the water body in the water tower 10 is at a position higher than the upper port of the water outlet pipe 40. During the peak period of electricity consumption, the water outlet valve 401 on the water outlet pipe 40 is opened, and the water in the water tower 10 flows out through the water outlet pipe 40 to impact the impeller of the generator set at a low position to generate electricity and replenish energy for the power grid. When the water body above the supporting plate 20 decreases, under the elastic force of each reset spring 502, the supporting plate 20 rises at a uniform speed according to the water outlet rate to keep the horizontal plane at a certain height, so that the impact force on the impeller of the generator always remains stable.

[0052] The above are only embodiments of the present invention, and the common knowledge such as the known specific structures and characteristics in the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A peak-shaving energy storage mechanism for a smart energy system, characterized by: It includes a water tower, a supporting plate slidably connected to the inner wall of the water tower, a water inlet pipe for injecting water into the inner cavity of the water tower, a water outlet pipe for guiding the water in the water tower to a generator, and an elastic mechanism arranged below the supporting plate to elastically connect the supporting plate to the inner bottom wall of the water tower. The water tower is arranged at a position higher than the altitude of a power station reservoir. The upper ends of the water inlet pipe and the water outlet pipe are both located above the supporting plate. An inlet valve is arranged on the water inlet pipe, and an outlet valve is arranged on the water outlet pipe. When water is continuously injected into the inner cavity of the water tower above the supporting plate through the water inlet pipe so that the horizontal plane exceeds the upper end of the outlet pipe by a certain distance, the supporting plate starts to slide down at a uniform speed under the action of the elastic mechanism so that the height of the horizontal plane in the water tower remains unchanged.

2. The peak-shaving energy storage mechanism for a smart energy system according to claim 1, characterized in that: The elastic mechanism includes a multi-layer spring group arranged in sequence from top to bottom and an annular plate horizontally arranged between adjacent spring groups, each of the spring groups includes a plurality of evenly distributed return springs, the return springs are arranged vertically, the upper end of each return spring in the top spring group is fixedly connected to the supporting plate, and the lower end is fixedly connected to the annular plate below, the upper end of each return spring in the bottom spring group is fixedly connected to the annular plate above, and the lower end is connected to the bottom wall of the water tower, the upper end of the return spring in the middle spring group is fixedly connected to the annular plate above, and the lower end is fixedly connected to the annular plate below.

3. The peak load storage mechanism for a smart energy system according to claim 2, characterized in that: The inner wall of the water tower is fixedly connected to a limit block, and the support plate is located below the limit block. The support plate and the limit block are in close contact so that each of the return springs is in a compressed state. When water is injected above the support plate so that the horizontal plane exceeds the upper end of the water outlet pipe by a certain distance, the support plate begins to move downward and separate from the limit block.

4. The peak load storage mechanism for a smart energy system according to claim 3, characterized in that: The stiffness coefficient K of the return spring is: K=ρπr 2 gN / n Among them, ρ is the density of the water body; r is the inner wall radius of the water tower; g is the acceleration of gravity; N is the total number of layers of the spring group; n is the number of return springs in each spring group.

5. The peak load storage mechanism for a smart energy system according to claim 4, characterized in that: An annular sealing plate is arranged on the inner wall of the upper end of the water tower, and the annular sealing plate is sealed and fixedly connected to the inner wall of the water tower. A flexible waterproof cloth tube with openings at both ends is vertically arranged between the annular sealing plate and the supporting plate, and the upper end of the flexible waterproof cloth tube is sealed and fixedly connected to the lower end surface of the annular sealing plate, and the lower end of the flexible waterproof cloth tube is sealed and fixedly connected to the edge of the upper surface of the supporting plate.

6. The peak load storage mechanism for a smart energy system according to claim 2, characterized in that: A guide rod is vertically arranged on the inner wall of the water tower, and guide grooves which are slidably matched with the guide rod are vertically arranged on the outer peripheral surface of the supporting plate and the outer peripheral surface of the annular plate.

7. The peak load storage mechanism for a smart energy system according to claim 2, characterized in that: The bottom surfaces of the support plate and each annular plate are evenly distributed with a plurality of limit columns for preventing the reset spring from being over-compressed. The upper end of the limit column is fixedly connected to the support plate or the annular plate, and the lower end of the limit column is a free end.

8. The peak load storage mechanism for a smart energy system according to claim 1, characterized in that: The water tower is a circular cylinder with an opening at the upper end, and an exhaust hole is arranged on the lower side wall of the water tower.

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