Power grid service system based on gravity energy storage

Abstract

The invention provides a power grid service system based on gravity energy storage, and the system comprises a first subsystem which is composed of a closed guide rail system disposed on a fluctuating structural surface, and a plurality of gravity energy conversion vehicles running in the guide rail system. Part of the gravitational energy conversion vehicle in the first subsystem converts photovoltaic electricity into gravitational potential energy of the gravitational energy conversion vehicle in the process of ascending along the track; meanwhile, the other part of the gravity energy conversion vehicle converts potential energy into controllable alternating current which is preferred by a power grid and has rotational inertia in the descending process along the track and transmits the controllable alternating current to the power grid. The second subsystem is a vertical gravity energy storage system, can independently complete charging-discharging work, and can cooperate with the first subsystem to complete stable power supply to the network. The service system can carry out real-time charging-discharging work in the morning and afternoon; energy is stored in the'light (electricity) abandoning 'period at noon, and discharging is carried out in the electricity utilization peak at night, so that the economical efficiency of a photovoltaic power generation project is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage, and more specifically, relates to a power grid service system based on gravity energy storage. Background Art

[0002] An important feature of the new power system is the use of a high proportion of clean energy (hydropower, wind power and photovoltaic power). The rapid progress of photovoltaic power generation technology in our country has sharply reduced the cost of photovoltaic power generation, and has also made photovoltaic power generation and wind power generation the most important clean energy of the new power system.

[0003] Photovoltaic power generation is greatly affected by the fact that sunlight is "out during the day and hidden at night" (power can only be generated during the day). Generally speaking, the power output of photovoltaic power generation during the day is normally distributed, that is, the light intensity is the highest during the noon period (11:00-13:00); it is low to high in the morning and high to low in the afternoon. The stability of power generation during the day is also affected by weather changes (such as rainy days, etc.), and the output power is very unstable, often referred to as "junk power". In particular, photovoltaic power needs to pass through an inverter before it can be input into the power grid, so photovoltaic power cannot provide the "rotational inertia" required for the safe and stable operation of the power grid. These inherent "defects" of photovoltaic power have caused the problem of "abandoning light (photovoltaic power)" in the current market to become more and more serious. The problem that makes the situation worse is that due to our living and production habits, the production power load during the noon period is sharply reduced, resulting in the inability to effectively utilize photovoltaic power during the period when it can generate the most electricity, resulting in a reduction and waste of green power, and greatly reducing the investment benefits of photovoltaic power generation projects. This increasingly prominent and acute problem is bound to affect the healthy development of photovoltaic power generation.

[0004] On the other hand, photovoltaic power is inherently a direct current power generation characteristic, so we must use a converter to convert it into alternating current that the grid can accept. In this conversion process, a large number of harmonics will be generated; there are also problems such as the grid-connected stability of the converter, which have a significant adverse impact on the grid. These problems have become the most critical technical bottleneck for the current grid to directly accept a high proportion of photovoltaic power. This bottleneck problem will seriously hinder the direct access ratio of photovoltaic power to the grid, and have a serious adverse impact on the economic and efficient use of photovoltaic power. It will also have a significant adverse impact on our achievement of the "30 / 60" goal.

[0005] Therefore, we designed a grid service system based on gravity energy storage to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a power grid service system based on gravity energy storage, aiming to solve the serious problem of "abandoning light (photovoltaic power)" caused by the poor stability of existing photovoltaic power generation and the acute problem that the peak period of photovoltaic power generation is during the period of low grid absorption capacity.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: to provide a power grid service system based on gravity energy storage, which consists of two subsystems. The first subsystem is a closed system, which converts photovoltaic electricity into its gravitational potential energy (uphill process) through a gravity energy conversion vehicle arranged on a track (with a heavy rack in the middle); at the same time, the gravity energy conversion vehicle with the maximum potential energy (at the highest point) converts the gravitational potential energy into alternating current (downhill process) and inputs it into the power grid. After running for a certain period of time, this subsystem forms a stable closed operation system for real-time charging and discharging. Each gravity energy conversion vehicle runs independently in the track system. After completing a "charge and discharge" work through the first uphill and downhill, it turns to another track and starts the second uphill and downhill "charge and discharge" work. This gravity energy conversion vehicle runs continuously in the closed track system. Multiple identical gravity energy conversion vehicles run in the same closed track system to form a powerful real-time "charge-discharge" system. The second subsystem is the same type of (gear-rolling) gravity energy storage system, which consists of an upright concrete cube cylinder and a gear-rolling gravity energy storage system. This subsystem can provide timely supplementary power supply when the output power of the first subsystem decreases (when the gravity block drops, the rack drives the conventional generator to generate electricity) to maintain the stability of the output power of the entire large system. This system stores energy when photovoltaic power is "excessive" (the photovoltaic power drives the motor to drive the gravity block to a certain height or the highest position to store energy), releases electricity to the power grid when needed, and cooperates with the first subsystem to complete the function of stable power supply. At the same time, the second subsystem can also convert its stored energy into electricity and transmit it to the power grid when the power grid needs it. Therefore, this service system composed of the first subsystem and the second subsystem can "upgrade" photovoltaic power into controllable alternating current with rotational inertia preferred by the power grid in the morning and afternoon (completed by the first subsystem and the second subsystem). At noon (abandoning light (electricity)), the second subsystem completes the energy storage work, and during the peak power consumption period of the power grid, the porridge energy supplies power to the power grid.

[0008] This system is different from other similar gravity energy storage systems in that: 1. Our system can fully and effectively utilize the important characteristics of gravity energy storage: the number of charge and discharge times is inversely related to the "cost per kilowatt-hour". This system charges and discharges almost "around the clock" during the day, so the "cost per kilowatt-hour" is extremely low. 2. This system can help photovoltaic power plants convert photovoltaic electricity into stable and controllable alternating current with rotational inertia in real time for consumption in the power grid. It can also store electrical energy during the off-peak period of the power grid, and release energy to supply power to the power grid during the peak period of the power grid. More specifically, this system includes:

[0009] The first energy storage component includes a first energy storage structure and a support surface arranged at the top of the first energy storage structure; the first energy storage structure has two use states: storing energy and converting energy into electrical energy for release;

[0010] A guide rail structure is arranged on the support surface; the guide rail structure has a height difference; the guide rail structure includes an ascending section and a descending section connected to the ascending section;

[0011] A gravity energy conversion vehicle is movably connected to the guide rail structure; a photovoltaic power conversion component is connected to the gravity energy conversion vehicle; there are multiple gravity energy conversion vehicles, some of which are located in the ascending section, and other gravity energy conversion vehicles are located in the descending section.

[0012] Preferably, at the same time, some of the gravity energy conversion vehicles convert the electrical energy produced by the photovoltaic conversion components into potential energy while climbing upward in the ascending section; other gravity energy conversion vehicles move downward in the descending section and convert the gravity potential energy into electrical energy.

[0013] Preferably, the gravity energy conversion vehicle comprises:

[0014] A vehicle body is movably connected to the guide rail structure; the vehicle body is configured to move along a path planned by the guide rail structure when subjected to force; the photovoltaic power conversion component is provided on the vehicle body;

[0015] A potential energy conversion structure is provided on the vehicle body and is used to convert electrical energy into potential energy during the upward climbing process;

[0016] An electric energy release structure, disposed on the vehicle body, for converting gravitational potential energy into electric energy when moving downward;

[0017] The energy storage component is arranged on the vehicle body, and the energy storage component is electrically connected to the photovoltaic power conversion component.

[0018] Preferably, the first energy storage structure comprises:

[0019] The main structure is provided with a vertically arranged movable guide rail;

[0020] A gravity energy storage component connected to the movable guide rail;

[0021] A first power generation component connected to the gravity energy storage component;

[0022] A support top connected to the top of the structural body; the end surface of the support top facing away from the structural body is the support surface;

[0023] When the gravity energy storage component is powered on, the gravity energy storage component moves upward along the movable guide rail; when the gravity energy storage component moves downward, the gravity energy storage component generates electricity by moving downward along the movable guide rail.

[0024] Preferably, a plurality of the movable guide rails are provided, and there is a height difference between adjacent movable guide rails.

[0025] Preferably, the plurality of movable guide rails are arranged in order of height from low to high, and then arranged in order of height from low to high.

[0026] Preferably, the first energy storage structure further comprises a locking member, and when the structural body moves to a preset position, the locking member can lock the position of the gravity energy storage member.

[0027] Preferably, the guide rail structure is provided in multiple groups at intervals along any direction of the support surface; and the gravity energy conversion vehicle corresponds one-to-one to the guide rail structure.

[0028] The beneficial effect of the power grid service system based on gravity energy storage provided by the present invention is that: compared with the prior art, the power grid service system based on gravity energy storage provided by the present invention "absorbs" unstable photovoltaic electricity, and under controlled conditions, "modulates" it into "conventional electricity" (such as thermal power) with rotational inertia and then sends it into the power grid, which can effectively solve the problems of "volatility, randomness, instability" and other problems of photovoltaic electricity, release huge investment space for the photovoltaic power generation market, and benefit the country and the people. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a power grid service system based on gravity energy storage provided by an embodiment of the present invention Figure 1 ;

[0031] Figure 2 Another structural diagram of a power grid service system based on gravity energy storage provided by an embodiment of the present invention Figure 2 ;

[0032] Figure 3 A schematic diagram of a three-dimensional structure of another power grid service system based on gravity energy storage provided by an embodiment of the present invention Figure 1 ;

[0033] Figure 4Another structural diagram of a power grid service system based on gravity energy storage provided by an embodiment of the present invention Figure 2 ;

[0034] Figure 5 Another structural diagram of a power grid service system based on gravity energy storage provided by an embodiment of the present invention Figure 3 ;

[0035] Figure 6 Another structural diagram of a power grid service system based on gravity energy storage provided by an embodiment of the present invention Figure 4 ;

[0036] Figure 7 A schematic structural diagram of a gravity energy conversion vehicle used in another power grid service system based on gravity energy storage provided by an embodiment of the present invention;

[0037] Figure 8 A structural schematic diagram of a first energy storage structure used in another power grid service system based on gravity energy storage provided by an embodiment of the present invention;

[0038] Fig. 9 A structural schematic diagram of a guide rail structure used in a power grid service system based on gravity energy storage provided by an embodiment of the present invention;

[0039] Fig.10 A usage status diagram of a power grid service system based on gravity energy storage provided by an embodiment of the present invention.

[0040] In the figure: 1. guide rail structure; 11. ascending section; 12. descending section; 2. first energy storage component; 21. first energy storage structure; 211. structural body; 212. movable guide rail; 213. gravity energy storage component; 214. first power generation device; 215. supporting top; 22. supporting surface; 3. gravity energy conversion vehicle; 31. vehicle body; 32. energy storage component; 33. potential energy conversion structure; 34. electric energy release structure; 4. photovoltaic power conversion component. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] To achieve the above purpose, the technical solution adopted by the present invention is: to provide a power grid service system based on gravity energy storage, which consists of two subsystems. The first subsystem is a closed system, which converts photovoltaic electricity into its gravitational potential energy (uphill process) through a gravity energy conversion vehicle arranged on a track (with a heavy rack in the middle); at the same time, the gravity energy conversion vehicle with the maximum potential energy (at the highest point) converts the gravitational potential energy into alternating current (downhill process) and inputs it into the power grid. After running for a certain period of time, this subsystem forms a stable closed operation system for real-time charging and discharging. Each gravity energy conversion vehicle runs independently in the track system. After completing a "charge and discharge" work through the first uphill and downhill, it turns to another track and starts the second uphill and downhill "charge and discharge" work. This gravity energy conversion vehicle runs continuously in the closed track system. Multiple identical gravity energy conversion vehicles run in the same closed track system to form a powerful real-time "charge-discharge" system. The second subsystem is the same type of (gear-rolling) gravity energy storage system, which consists of an upright concrete cube cylinder and a gear-rolling gravity energy storage system. This subsystem can provide timely supplementary power supply when the output power of the first subsystem decreases (when the gravity block drops, the rack drives the conventional generator to generate electricity) to maintain the stability of the output power of the entire large system. This system stores energy when photovoltaic power is "excessive" (the photovoltaic power drives the motor to drive the gravity block to a certain height or the highest position for energy storage), and releases electricity to the power grid when needed, cooperating with the first subsystem to complete the function of stable power supply. This system is different from other similar gravity energy storage in that: 1. Our system can fully and effectively utilize the important characteristics of gravity energy storage: the number of charge and discharge times is inversely related to the "cost per kilowatt-hour". This system is almost "all-weather" uninterrupted operation charging and discharging during the day, so the "cost per kilowatt-hour" is extremely low. 2. This system can help photovoltaic power plants convert photovoltaic power into stable and controllable alternating current with rotational inertia in real time for consumption in the power grid.

[0045] Specifically, a power grid service system based on gravity energy storage includes: a first subsystem, which is arranged on a support surface of a support structure and on the corresponding ground; the first subsystem has the function of converting the stored energy (potential energy) into electric energy and transmitting it to the power grid while charging and storing energy, so as to realize the "real-time" online consumption of photovoltaic electricity. This subsystem is composed of a closed rail system and a gravity energy conversion vehicle. The rail system is arranged on an undulating structural surface; the moving gravity energy conversion vehicle is movably connected to the rail structure. There are multiple gravity energy conversion vehicles, some of which convert photovoltaic electricity into the gravity potential energy of the gravity energy conversion vehicle during the ascent process, and other gravity energy conversion vehicles convert the potential energy into a controllable alternating current with rotational inertia preferred by the power grid and transmit it to the power grid during the descent process. The second subsystem is arranged below the structural support surface to support the support surface. This subsystem is composed of a number of upright gravity energy storage concrete structures. The energy stored in this subsystem (gravitational potential energy converted from photovoltaic electricity) can be promptly converted into AC power of the same nature as the first subsystem and input into the power grid when the output power of the first subsystem is insufficient, so as to maintain the stable output power of the entire service system. The two subsystems together form a comprehensive functional system. The power grid service system based on gravity energy storage provided by the present invention can effectively solve the problem of the inability to timely and large-scale absorption caused by the "volatility, randomness, instability" and other problems of photovoltaic electricity. For more details, please refer to Figures 1 to 9 , a power grid service system based on gravity energy storage provided by the present invention is now described. The power grid service system based on gravity energy storage comprises: a guide rail structure 1, a first energy storage component 2, and a gravity energy conversion vehicle 3. The first energy storage component 2 comprises a first energy storage structure 21 and a support surface 22 arranged at the top of the first energy storage structure 21; the first energy storage component 2 is a vertical gravity energy storage structure, which can convert the stored gravity potential energy into electrical energy in time; the first energy storage component 2 has two use states, in the first use state, the first energy storage component 2 performs energy storage operation; in the second use state, the first energy storage component converts energy into electrical energy for release; the guide rail structure 1 is arranged on the support surface 22; the guide rail structure 1 has a height difference; The guide rail structure 1 includes an ascending section 11 and a descending section 12 connected to the ascending section 11; the gravity energy conversion vehicle 3 is movably connected to the guide rail structure 1; a photovoltaic power conversion component 4 is connected to the gravity energy conversion vehicle 3; there are multiple gravity energy conversion vehicles 3, at least any one gravity energy conversion vehicle 3 is located in the ascending section 11, and any one gravity energy conversion vehicle 3 is located in the descending section 12; at the same time, some gravity energy conversion vehicles 3 convert the electrical energy produced by the photovoltaic power conversion component 4 into potential energy during the upward climbing process of the ascending section 11; other gravity energy conversion vehicles 3 move downward in the descending section 12 and convert the gravity potential energy into electrical energy.

[0046] Compared with the prior art, the power grid service system based on gravity energy storage provided by the present invention "absorbs" unstable photovoltaic electricity, and then "modulates" it into "conventional electricity" (such as thermal power) with rotational inertia under controlled conditions and then sends it into the power grid. It can effectively solve the problems of "volatility, randomness, instability" and so on of photovoltaic electricity, release huge investment space for the photovoltaic power generation market, and benefit both the country and the people.

[0047] In any possible implementation, please refer to Fig.10 The guide rail structure 1 is composed of a double rail and a middle rack rail.

[0048] As a specific implementation of the embodiment of the present invention, please refer to Figures 1 to 9 The first energy storage structure 21 includes: a structural body 211, a gravity energy storage component 213, a first power generation element 214 and a support top 215. The structural body 211 is provided with a vertically arranged movable guide rail 212; the gravity energy storage element 213 is connected to the movable guide rail 212; the first power generation element 214 is electrically connected to the gravity energy storage element 213; the support top 215 is connected to the top of the structural body 211; the end surface of the support top 215 away from the structural body 211 is the support surface 22; when the gravity energy storage element 213 is energized, the gravity energy storage element 213 moves upward along the movable guide rail 212; when the gravity energy storage element 213 moves downward, the gravity energy storage element 213 generates electricity by moving downward along the movable guide rail 212.

[0049] In any feasible embodiment, a plurality of movable guide rails 212 are provided, and there is a height difference between adjacent movable guide rails 212. The plurality of movable guide rails 212 are arranged from low to high in height, and then arranged from low to high.

[0050] In any feasible embodiment, a plurality of gravity energy storage components 213 are provided along the height direction of the movable guide rail 212. Each gravity energy storage component 213 is provided with a first power generation component 214 respectively.

[0051] As a specific implementation of the embodiment of the present invention, please refer to Figures 1 to 9 The gravity energy conversion vehicle 3 includes: a vehicle body 31, an energy storage component 32, a potential energy conversion structure 33 and an electric energy release structure 34; the vehicle body 31 is movably connected to the guide rail structure 1; the vehicle body 31 is configured to move along the path planned by the guide rail structure 1 when subjected to force; a photovoltaic power conversion component 4 is provided on the vehicle body 31; the potential energy conversion structure 33 is arranged on the vehicle body 31; it is used to convert electric energy into potential energy during the upward climbing process; the electric energy release structure 34 is arranged on the vehicle body 31, and is used to convert gravitational potential energy into electric energy when moving downward; the energy storage component 32 is arranged on the vehicle body 31, and the energy storage component 32 is electrically connected to the photovoltaic power conversion component 4. That is, the gravity energy conversion vehicle 3 includes a motor, a generator, a gear, a control system (automatic driving system) and other structural components.

[0052] The operation process of this gravity energy storage-based grid service system is as follows:

[0053] The photovoltaic power conversion component 4 absorbs solar energy and converts it into electrical energy. The electrical energy is transmitted to the energy storage component 32 for storage. When it is necessary to convert the electrical energy into potential energy, the energy storage component 32 outputs the electrical energy to the potential energy conversion structure. The potential energy conversion structure 32 can drive the vehicle body 31 to move relative to the guide rail structure 1 when it is powered on. In some feasible embodiments, the potential energy conversion structure 32 includes a walking structure arranged on the vehicle body 31, which is used to drive the motor structure of the walking structure. The motor structure is electrically connected to the energy storage component 32. The energy storage component 32 transmits electrical energy to the motor structure, and the operation of the motor structure drives the walking structure to work, thereby driving the vehicle body 31 to climb upward, and pause after climbing to a certain height (i.e., the top of the ascending section 11). This process converts the consumed electrical energy into the potential energy of the gravity energy conversion vehicle 3. In this state, the potential energy conversion structure continues to work and drives the gravity energy conversion vehicle 3 to move to the descending section 12. After the gravity energy conversion vehicle 3 moves to the descending section 12, the potential energy conversion structure stops working and the electric energy release structure 34 starts working. In some feasible embodiments, the electric energy release structure 34 includes a running wheel structure connected to the vehicle body 31, and a power generation structure arranged on the vehicle body 31 and connected to the running wheel structure. During the downward movement of the gravity energy conversion vehicle 3, the running wheel structure is driven to rotate, thereby driving the power generation structure to operate and generate electricity. The electric energy release structure 34 is electrically connected to the energy storage component 32. That is, the power generation structure can transmit the generated electricity to the energy storage component 32 for standby use. More specifically, when it starts to move downward, the running wheel in the running wheel structure is a gear structure. The guide rail structure 1 is provided with a rack adapted to the gear structure, and the gear structure interacts with the gear and the rack on the guide rail structure 1 to drive the power generation structure to generate electricity. In summary, the charging and discharging process is completed once. And in this process, the charging and discharging processes are "connected end to end". The number of gravity energy conversion vehicles 3 is set in multiple groups, so that at the same time, some gravity energy conversion vehicles 3 absorb photovoltaic electricity to accumulate potential energy during the climbing process, so as to achieve the conversion of electrical energy and gravitational potential energy; and some gravity energy conversion vehicles 3 convert gravitational potential energy into electrical energy during the downward movement. The charging and discharging process of the system can not only be controlled manually, but also produce the rotational inertia urgently needed by the power grid (the system uses the same generator as the thermal power unit). In this way, it can be perfectly realized that charging and discharging in a system can occur simultaneously. The setting of the first energy storage structure 21 can provide support for the guide rail structure 1, and the first energy storage structure 21 can also store a large amount of electrical energy and discharge it when the electricity price is high. This forms a "long-short time" energy storage complex, which provides conditions for us to "perfectly" ensure that photovoltaic electricity is timely and fully connected to the grid.

[0054] The grid service system based on gravity energy storage provided by the present invention realizes the coexistence of charging and discharging in a closed loop in real time, which can bring great economic and social value. It mainly utilizes the mutual conversion mechanism of gravitational potential energy and electricity, and can be implemented in places with a drop. The support surface 22 can be the surface of a building with a height difference.

[0055] Example 1

[0056] See also Figures 1 to 10 In this embodiment, a traffic track is added on the basis of a power grid service system based on gravity energy storage provided by the present invention, and the traffic track is responsible for the empty gravity energy car (after unloading the gravity block) to pass up and down. The basic function of the system provided by this embodiment is: when the power grid accepts photovoltaic power in the morning, the real-time storage-discharge system operates, and the photovoltaic power is converted into alternating current with rotational inertia through this process; during the "abandoning photovoltaic" period at noon, the gravity blocks on the lower platform are transported to the high platform for energy storage by using two gravity tracks. During the energy storage process, the empty car with the gravity block unloaded from the upper platform is sent to the lower platform by using the middle traffic track. After the gravity block is installed, the gravity track is used for energy storage and ascending movement, and this cycle continues until the energy storage process during the noon period is completed. Then the real-time storage-discharge cycle process continues. During the peak electricity consumption period in the evening, the energy stored at noon is released to support the power grid. This process is the opposite of the process at noon. Through two heavy rail channels, the gravity block is transported to the lower platform for energy (electricity) release. The empty car with the gravity block removed is sent back to the upper platform using the middle traffic track and then loaded with the gravity block. The energy release process continues until all the stored energy is completed! It runs day after day. The traffic track is between the two gravity tracks. In the morning, the system has a power washing effect, which can effectively improve the quality of electricity. At noon, the first energy storage component 2 performs the main operation to store electricity. In the afternoon, the system continues the morning power washing mode. At the peak of electricity consumption in the evening, the electricity stored in the first energy storage component 2 at noon is released.

[0057] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A power grid service system based on gravity energy storage, characterized in that: include: A first energy storage component (2) comprises a first energy storage structure (21) and a support surface (22) arranged at the top of the first energy storage structure (21); the first energy storage structure (21) has two use states: storing energy and converting energy into electrical energy for release; A guide rail structure (1) is arranged on the support surface (22); the guide rail structure (1) has a height difference; the guide rail structure (1) comprises an ascending section (11) and a descending section (12) connected to the ascending section (11); A gravity energy conversion vehicle (3) is movably connected to the guide rail structure (1); a photovoltaic power conversion component (4) is connected to the gravity energy conversion vehicle (3); there are a plurality of gravity energy conversion vehicles (3), some of which are located in the ascending section (11) and other of which are located in the descending section (12).

2. A power grid service system based on gravity energy storage as claimed in claim 1, characterized in that: At the same time, some of the gravity energy conversion vehicles (3) convert the electrical energy produced by the photovoltaic power conversion components (4) into potential energy while climbing upward in the ascending section (11); other gravity energy conversion vehicles (3) move downward in the descending section (12) and convert the gravity potential energy into electrical energy.

3. A power grid service system based on gravity energy storage as claimed in claim 2, characterized in that: The gravity energy conversion vehicle (3) comprises: A vehicle body (31) is movably connected to the guide rail structure (1); the vehicle body (31) is configured to move along a path planned by the guide rail structure (1) when subjected to force; and the photovoltaic power conversion component (4) is provided on the vehicle body (31); A potential energy conversion structure (33) is arranged on the vehicle body (31) and is used to convert electrical energy into potential energy during the upward climbing process; An electric energy release structure (34) is arranged on the vehicle body (31) and is used to convert gravitational potential energy into electric energy when moving downward; An energy storage component (32) is arranged on the vehicle body (31), and the energy storage component (32) is electrically connected to the photovoltaic power conversion component (4).

4. A power grid service system based on gravity energy storage as claimed in any one of claims 1 to 3, characterized in that: The first energy storage structure (21) comprises: A structural body (211) is provided with a vertically arranged movable guide rail (212); A gravity energy storage member (213) connected to the movable guide rail (212); A first power generating element (214) connected to the gravity energy storage element (213); A support top (215) connected to the top end of the structural body (211); the end surface of the support top (215) facing away from the structural body (211) is the support surface (22); When the gravity energy storage component (213) is powered on, the gravity energy storage component (213) moves upward along the movable guide rail (212); when the gravity energy storage component (213) moves downward, the gravity energy storage component (213) generates electricity by moving downward along the movable guide rail (212).

5. A power grid service system based on gravity energy storage as claimed in claim 4, characterized in that: A plurality of movable guide rails (212) are provided, and a height difference exists between adjacent movable guide rails (212).

6. A power grid service system based on gravity energy storage as claimed in claim 5, characterized in that: The plurality of movable guide rails (212) are first arranged from low to high according to height, and then arranged from low to high.

7. A power grid service system based on gravity energy storage as claimed in claim 3, characterized in that: The first energy storage structure (21) further comprises a locking member (216), and when the structural body (211) moves to a preset position, the locking member (216) can lock the position of the gravity energy storage member (213).

8. A power grid service system based on gravity energy storage as claimed in claim 1, characterized in that: The guide rail structure (1) is provided with a plurality of groups at intervals along any direction of the support surface (22); and the gravity energy conversion vehicle (3) corresponds one to one with the guide rail structure (1).

Images