Power grid service system based on gravity energy storage

Abstract

The utility model provides a power grid service system based on gravity energy storage, which comprises a first subsystem consisting of a closed guide rail system arranged on a fluctuating structural surface, a plurality of gravity energy conversion vehicles running in the guide rail system and the like. 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 utility model belongs to the energy storage technical field, more specifically, relate to a kind of electric network service system based on gravity energy storage. BACKGROUND

[0002] The important feature of new power system is the utilization of high proportion clean energy (hydroelectricity, wind power and photovoltaic power). Our country photovoltaic power generation technology rapidly advances, make photovoltaic power generation cost sharp reduction, also make photovoltaic power generation and wind power become the most important clean energy of new power system.

[0003] Photovoltaic power generation is greatly influenced by sunlight "day out night in" (only daytime can generate electricity). Generally, the power output of photovoltaic power generation in daytime is normally distributed, that is, the light intensity is highest in noon period (11:00-13:00) ; it presents from low to high in morning, and from high to low in afternoon. The generation stability in daytime is also influenced by weather change (such as rainy day, etc.), and the output power is very unstable, often called "junk electricity". Especially, photovoltaic power needs to pass through inverter before inputting into power grid, so photovoltaic power cannot provide "moment of inertia" which is necessary for safe and stable operation of power grid. These inherent "defects" of photovoltaic power cause the problem of "abandoned light (photovoltaic power)" to become more and more serious in the market. The particularly serious problem is that due to our living and production habits, the production electricity load sharply decreases in noon period, so photovoltaic power cannot be effectively utilized in the period when it can generate electricity most, resulting in the decrease of use amount of green electricity and waste, and greatly reducing the investment benefit of photovoltaic power generation project. This increasingly prominent acute problem will inevitably affect the healthy development of photovoltaic power generation.

[0004] On the other hand, photovoltaic power has inherent direct current generation characteristics, and we must convert it into alternating current which can be accepted by power grid through converter. A large amount of harmonics will be generated in this conversion process; there are also problems of grid stability, etc., which have significant adverse effects on power grid. These problems become the most critical technical bottleneck for the power grid to directly accept photovoltaic power in a high proportion. This bottleneck problem will seriously hinder the direct access of photovoltaic power to power grid in a high proportion, and have serious adverse effects on the economic and effective utilization of photovoltaic power. It will also have significant adverse effects on the realization of "30 / 60" goal.

[0005] Therefore, the utility model discloses an electric network service system based on gravity energy storage to solve the above problems. CONTENT OF UTILITY MODEL

[0006] The utility model discloses an electric network service system based on gravity energy storage, which aims to solve the serious problem of "abandoned light (photovoltaic power)" caused by the acute problem that photovoltaic power generation has poor stability and the high generation period of photovoltaic power is in the period of low power grid consumption capacity.

[0007] To achieve the above object, the utility model adopts the technical scheme of providing a kind of power grid service system based on gravity energy storage, this system is composed of two subsystems.The first subsystem is a closed system, it is converted into its gravity potential energy (uphill process) by the gravity energy conversion car laid on track (middle set with heavy rack rail) to photovoltaic electricity;At the same time, the gravity energy conversion car with maximum potential energy (at the highest) converts gravity potential energy into alternating current (downhill process) input power grid.This subsystem forms a stable closed operation system of real-time charging and discharging after running to a certain time.Each gravity energy conversion car is independently operated in track system, it completes a "charge-discharge" work by first uphill and downhill, and then starts second uphill and downhill "charge-discharge" work after switching to another track.The gravity energy conversion car keeps operating in the closed track system.A plurality of same gravity energy conversion cars operate in the same closed track system, forming a powerful real-time "charge-discharge" system.The second subsystem is the same type (hobbing) gravity energy storage system, which is composed of vertical concrete cube cylinder and hobbing gravity energy storage system.This subsystem can supplement power supply in time (when gravity block descends, rack drives conventional generator to generate electricity) when the output power of the first subsystem is reduced, to maintain the stability of the output power of the whole system.This system stores energy when photovoltaic electricity is "excessive" (photovoltaic electricity drives motor to drive gravity block to ascend to a certain height or highest position to store energy), and releases electric energy to power grid when needed, to complete the function of stable power supply with the first subsystem.At the same time, the second subsystem can also convert the stored energy into electric energy and deliver it to the power grid when the power grid needs it.So, the service system composed of the first subsystem and the second subsystem can "upgrade" photovoltaic electricity into controllable alternating current with rotational inertia (completed by the first subsystem and the second subsystem) preferred by power grid in the morning and afternoon period, and the second subsystem completes the energy storage work in the noon (abandoning light (electricity)) period, and supplies power to the power grid in the power grid peak period.

[0008] The 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 proportional to the "cost per kilowatt-hour". This system operates continuously for almost "all day" during the day, so the "cost per kilowatt-hour" is very low.2. This system can help photovoltaic power plant to convert photovoltaic electricity into stable controllable alternating current with rotational inertia for consumption in power grid in real time. It can also store electric energy during the power grid low valley period and release energy to power grid during the power grid peak period. More specifically, the system includes:

[0009] A first energy storage assembly includes a first energy storage structure and a support surface disposed at a top end of the first energy storage structure; the first energy storage structure has two use states of energy storage and energy conversion into electrical energy for release;

[0010] A guide rail structure is disposed 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; the gravity energy conversion vehicle is connected with a photovoltaic electrical conversion assembly; a plurality of gravity energy conversion vehicles are provided, some of which are located on the ascending section and the others are located on the descending section.

[0012] Preferably, at the same time, some of the gravity energy conversion vehicles convert the electrical energy generated by the photovoltaic conversion assembly into potential energy during upward climbing on the ascending section; the others convert the gravitational potential energy into electrical energy during downward movement on the descending section.

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

[0014] A vehicle body is movably connected to the guide rail structure; the vehicle body is configured to move along a planned path of the guide rail structure when subjected to force; the vehicle body is provided with the photovoltaic electrical conversion assembly;

[0015] A potential energy conversion structure is disposed on the vehicle body; for converting electrical energy into potential energy during upward climbing;

[0016] An electrical energy release structure is disposed on the vehicle body; for converting gravitational potential energy into electrical energy during downward movement;

[0017] An energy storage assembly is disposed on the vehicle body; the energy storage assembly is electrically connected to the photovoltaic electrical conversion assembly.

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

[0019] A structural body is provided with a movable guide rail arranged vertically;

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

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

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

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

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

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

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

[0027] Preferably, the guide rail structure is provided in plurality along the support surface in either direction; and the gravity energy conversion vehicle corresponds to the guide rail structure one by one.

[0028] The gravity energy storage-based power grid service system has the advantages that compared with the prior art, the gravity energy storage-based power grid service system can effectively solve the problems of volatility, randomness and instability of photovoltaic electricity, release huge investment space for the photovoltaic power generation market, and benefit the country and the people. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 The gravity energy storage-based power grid service system provided by the embodiments of the present application Figure 1

[0031] Figure 2 Another structure diagram of the gravity energy storage-based power grid service system provided by the embodiments of the present application Figure 2

[0032] Figure 3 Another structure diagram of the gravity energy storage-based power grid service system provided by the embodiments of the present application Figure 1

[0033] Figure 4 ​​​Another structure schematic diagram of the power grid service system based on gravity energy storage is provided for the embodiment of the utility model Figure 2 ;

[0034] Figure 5 Another structure schematic diagram of the power grid service system based on gravity energy storage is provided for the embodiment of the utility model Figure 3 ;

[0035] Figure 6 Another structure schematic diagram of the power grid service system based on gravity energy storage is provided for the embodiment of the utility model Figure 4 ;

[0036] Figure 7 Another structure schematic diagram of the gravity energy conversion vehicle used in the power grid service system based on gravity energy storage is provided for the embodiment of the utility model

[0037] Figure 8 Another structure schematic diagram of the first energy storage structure used in the power grid service system based on gravity energy storage is provided for the embodiment of the utility model

[0038] Figure 9 Another structure schematic diagram of the guide rail structure used in the power grid service system based on gravity energy storage is provided for the embodiment of the utility model.

[0039] In the drawing: 1, guide rail structure; 11, ascending section; 12, descending section; 2, first energy storage assembly; 21, first energy storage structure; 211, structure main body; 212, movable guide rail; 213, gravity energy storage assembly; 214, first power generation part; 215, support top; 22, support surface; 3, gravity energy conversion vehicle; 31, vehicle body; 32, energy storage assembly; 33, potential energy conversion structure; 34, electric energy release structure; 4, photovoltaic electric conversion assembly. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0041] In the description of the utility model, it is necessary to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and is not indicating or implying that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the utility model, it is necessary to explain, unless otherwise expressly provided and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, can also be detachably connected, or integrally connected, can be mechanically connected, can also be electrically connected, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0043] To achieve the above object, the utility model adopts the technical scheme: provide a kind of electric network service system based on gravity energy storage, this system is composed of two subsystems.The first subsystem is a closed system, and it is converted into its gravity potential energy (uphill process) by gravity energy conversion car laid on track (middle is provided with heavy rack rail) to photovoltaic electricity;At the same time, the gravity energy conversion car with maximum potential energy (at the highest) converts gravity potential energy into alternating current (downhill process) input electric network.This subsystem forms a stable closed operation system of real-time charging and discharging after running to a certain time.Each gravity energy conversion car is independently operated in track system, and it starts the second uphill and downhill "charge-discharge" work after turning to another track after completing the first uphill and downhill "charge-discharge" work.The gravity energy conversion car is in the closed track system and keeps running.Multiple same gravity energy conversion cars run in the same closed track system, and form a powerful real-time "charge-discharge" system.The second subsystem is the same type (hobbing) gravity energy storage system, which is composed of vertical concrete cube cylinder and hobbing gravity energy storage system.The subsystem can supplement power in time when the output power of the first subsystem is reduced (the gravity block is driven by rack to generate electricity when descending), to maintain the stability of the output power of the whole system.The system stores energy when photovoltaic electricity is "excessive" (photovoltaic electricity drives motor to drive gravity block to ascend to a certain height or highest position to store energy), and releases electric energy to electric network when needed, to complete the function of stable power supply with the first subsystem.The system is different from other similar gravity energy storage systems in that:1.the system can fully and effectively utilize the important characteristics of gravity energy storage: the number of charge-discharge times and "degree of electricity cost" are inversely related.The system is almost "all-weather" uninterrupted operation charging and discharging during the day, so the "degree of electricity cost" is very low.2.the system can help photovoltaic power plant to convert photovoltaic electricity into stable controllable alternating current with rotational inertia in real time in electric network for consumption.

[0044] Specifically, a power grid service system based on gravity energy storage comprises: a first subsystem, the system is arranged on a support surface of a support structure and a corresponding ground; the first subsystem has the function of converting the stored energy (gravitational potential energy converted from photovoltaic power) into alternating current of the same nature as the first subsystem to input into the power grid to maintain the stable output of the power of the entire service system when the output power of the first subsystem is insufficient; the two subsystems together form a comprehensive functional system. Figures 1 to 9 The power grid service system based on gravity energy storage comprises: a guide rail structure 1, a first energy storage assembly 2, and a gravity energy conversion vehicle 3; the first energy storage assembly 2 comprises a first energy storage structure 21 and a support surface 22 arranged at the top end of the first energy storage structure 21; the first energy storage assembly 2 is a vertical gravity energy storage structure and can convert the stored gravitational potential energy into electrical energy in time; the first energy storage assembly 2 has two use states, a first use state in which the first energy storage assembly 2 performs energy storage operation and a second use state in which the first energy storage assembly 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 comprises an ascending section 11 and a descending section 12 connected with the ascending section 11; the gravity energy conversion vehicle 3 is movably connected with the guide rail structure 1; the gravity energy conversion vehicle 3 is connected with a photovoltaic power conversion assembly 4; the number of the gravity energy conversion vehicles 3 is multiple; at least any gravity energy conversion vehicle 3 is located on the ascending section 11, and any gravity energy conversion vehicle 3 is located on the descending section 12; at the same time, some gravity energy conversion vehicles 3 convert the electrical energy generated by the photovoltaic power conversion assembly 4 into potential energy in the process of climbing upward on the ascending section 11, and the other gravity energy conversion vehicles 3 convert the gravitational potential energy into electrical energy in the process of moving downward on the descending section 12.

[0045] The utility model provides a kind of power grid service system based on gravity energy storage, compared with prior art, unstable photovoltaic electricity is "absorbed", under control condition, it is "modulated" into the "conventional electricity" (such as thermal power) with rotational inertia again sent into power grid, and the problems such as "volatility random instability of photovoltaic electricity can be effectively solved, release huge investment space for photovoltaic power generation market, benefit the country and the people.

[0046] In any implementable embodiment, the guide rail structure 1 is composed of double rails and a middle rack rail.

[0047] As a specific embodiment of the utility model embodiment, please refer to Figures 1 to 9 , the first energy storage structure 21 includes: structure main body 211, gravity energy storage component 213, first power generation piece 214 and support top 215, structure main body 211 is equipped with the movable guide rail 212 of vertical arrangement;Gravity energy storage component 213 is connected with movable guide rail 212;First power generation piece 214 is electrically connected with gravity energy storage component 213;Support top 215 is connected with the top of structure main body 211;The end face of support top 215 away from structure main body 211 is support surface 22;When gravity energy storage component 213 is energized, gravity energy storage component 213 moves upwards along movable guide rail 212;When gravity energy storage component 213 moves downwards, gravity energy storage component 213 generates electricity by moving downwards along movable guide rail 212.

[0048] In any implementable embodiment, movable guide rail 212 is equipped with multiple, and there is height difference between adjacent movable guide rails 212. Multiple movable guide rails 212 are arranged from low to high in height, and then arranged from low to high.

[0049] In any implementable embodiment, gravity energy storage component 213 is provided with multiple along the height direction of movable guide rail 212. Each gravity energy storage component 213 is respectively provided with first power generation piece 214.

[0050] As a specific embodiment of the utility model embodiment, please refer to Figures 1 to 9 , gravity energy conversion car 3 includes: car body 31, energy storage component 32, potential energy conversion structure 33 and electric energy release structure 34;Car body 31 is movably connected with guide rail structure 1;Car body 31 is configured to move along the path planned by guide rail structure 1 when stressed;Car body 31 is equipped with photovoltaic electricity conversion component 4;Potential energy conversion structure 33 is arranged on car body 31;For converting electric energy into potential energy during upward climbing;Electric energy release structure 34 is arranged on car body 31, for converting gravitational potential energy into electric energy when moving downwards;Energy storage component 32 is arranged on car body 31, and energy storage component 32 is electrically connected with photovoltaic electricity conversion component 4. That is, gravity energy conversion car 3 includes motor, generator, gear, control system (automatic driving system) and other structure.

[0051] The operation process of the power grid service system based on gravity energy storage is as follows:

[0052] The photovoltaic power conversion component 4 absorbs solar energy and converts the solar energy into electric energy. The electric energy is transported to the energy storage component 32 for storage. When it is needed to convert the electric energy into potential energy, the energy storage component 32 outputs the electric energy to the potential energy conversion structure, and the potential energy conversion structure 32 can drive the vehicle body 31 to move relative to the guide rail structure 1 in the energized state. In some realizable embodiments, the potential energy conversion structure 32 includes a walking structure arranged on the vehicle body 31, and a motor structure for driving the walking structure. The motor structure is electrically connected with the energy storage component 32. The energy storage component 32 transmits the electric energy to the motor structure, and the motor structure drives the walking structure to work, thereby driving the vehicle body 31 to climb upward, and stopping at the top point of the climbing section 11 (i.e. the top point of the climbing section 11) after climbing to a certain height. This process converts the consumed electric energy into the potential energy of the gravity energy conversion vehicle 3. In this state, the potential energy conversion structure continues to work to drive 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 to work. In some realizable embodiments, the electric energy release structure 34 includes a walking wheel structure connected with the vehicle body 31, and a power generation structure arranged on the vehicle body 31 and in transmission connection with the walking wheel structure. Through the downward movement of the gravity energy conversion vehicle 3, the walking wheel structure is driven to rotate, thereby driving the power generation structure to work to generate electricity. The electric energy release structure 34 is electrically connected with the energy storage component 32. That is, the power generation structure can transport the generated electric energy to the energy storage component 32 for standby use. More specifically, the downward movement is started, and the walking wheels in the walking wheel structure are gear structures. The guide rail structure 1 is provided with a rack matched with the gear structure, and the gear structure and the rack on the guide rail structure 1 interact to drive the power generation structure to generate electricity. As described above, one charging and discharging process is completed. In this process, the charging and discharging processes are "connected at both ends". The number of gravity energy conversion vehicles 3 is provided in multiple groups, so that a part of the gravity energy conversion vehicles 3 can absorb photovoltaic power to accumulate potential energy in the process of climbing, so as to realize the conversion of electric energy and gravitational potential energy; and another part of the gravity energy conversion vehicles 3 can convert gravitational potential energy into electric energy in the process of moving downward. The charging and discharging processes of the system can not only be artificially controlled, but also can output the rotational inertia (the system uses the same generator as the thermal power unit) urgently needed by the power grid. In this way, the charging and discharging in a system can be perfectly realized at the same time. The first energy storage structure 21 can provide support for the guide rail structure 1, and can also store a large amount of electric energy for discharging at high electricity prices. This forms a "long-short-time" energy storage complex, which provides conditions for us to "perfectly" ensure that photovoltaic power is timely and fully connected to the grid.

[0053] The power grid service system based on gravity energy storage provided by the utility model realizes coexistence of charging and discharging in a closed loop, and is real-time, which can bring great economic and social value. The mechanism of mutual conversion of gravity potential energy and electricity is mainly used, and the system can be implemented at the fusion place with a difference.

[0054] Embodiment 1

[0055] Please refer to Figures 1 to 9 In the embodiment, a traffic track is additionally arranged on the basis of the power grid service system based on gravity energy storage provided by the utility model, and the traffic track is responsible for the up and down traffic of the empty gravity energy car (after the gravity block is unloaded). The basic function of the system provided by the embodiment is that when the power grid accepts photovoltaic electricity in the morning, the real-time storage-discharge system operates, and the photovoltaic electricity is changed into alternating current with rotational inertia through the process; when the photovoltaic electricity is abandoned in the noon period, the two gravity tracks are used to transport the gravity block on the lower platform to the high platform to store energy. In the energy storage process, the traffic track in the middle is used to send the empty car unloaded with the gravity block on the upper platform to the lower platform, and after the gravity block is loaded, the energy storage ascending movement is carried out through the gravity track, and the process is continuously cycled until the energy storage process in the noon period is completed. Then, the real-time storage-discharge cycle process is continuously carried out. In the evening peak period, the energy stored in the noon is released to support the power grid. The process and the process in the noon are operated in the opposite direction, the gravity block is transported to the lower platform through the two gravity tracks to release energy (electricity), and the empty car unloaded with the gravity block is sent back to the upper platform through the traffic track in the middle after the gravity block is loaded, and the process of releasing energy is continuously carried out until all the stored energy is released! The operation is repeated every year. The traffic track is in the middle of the two gravity tracks. In the morning, the system has the effect of washing electricity, and can effectively improve the quality of electricity. In the noon, the first energy storage assembly 2 mainly stores electricity. In the afternoon, the system continues the washing electricity mode in the morning. In the evening peak period, the electricity stored in the first energy storage assembly 2 in the noon is released.

[0056] Obviously, the above embodiments are only examples for clearly illustrating, and are not limitation to the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A gravity-based energy storage grid service system, characterized by, The utility model relates to a kind of energy storage components (2) and gravity energy conversion car (3) and the energy conversion car (3) of track structure (1) are connected, including: First energy storage component (2), including first energy storage structure (21), support surface (22) being arranged at the top of the first energy storage structure (21);The first energy storage structure (21) has two use states of energy storage and energy conversion to electric energy release; Track structure (1) is arranged on the support surface (22);The track structure (1) has height difference;The track structure (1) includes rising section (11) and descending section (12) connected with the rising section (11); Gravity energy conversion car (3) is movably connected with the track structure (1);The gravity energy conversion car (3) is connected with photovoltaic electric conversion component (4);The number of the gravity energy conversion car (3) is provided with multiple, some gravity energy conversion car (3) is located in the rising section (11), and other gravity energy conversion car (3) is located in the descending section (12).

2. A gravity stored energy based grid service system as claimed in claim 1, wherein, At the same time, some gravity energy conversion car (3) is converted into potential energy in the rising section (11) during upward climbing, and other gravity energy conversion car (3) moves downward in the descending section (12) and converts gravitational potential energy into electric energy.

3. A gravity stored energy based grid service system as claimed in claim 2, wherein, The gravity energy conversion car (3) includes: Vehicle body (31) is movably connected with the track structure (1);The vehicle body (31) is configured to generate movement along the path planned by the track structure (1) when being stressed;The vehicle body (31) is provided with the photovoltaic electric conversion component (4); Potential energy conversion structure (33) is arranged on the vehicle body (31);For converting electric energy into potential energy during upward climbing; Electric energy release structure (34) is arranged on the vehicle body (31), for converting gravitational potential energy into electric energy when moving downward; Energy storage component (32) is arranged on the vehicle body (31), and energy storage component (32) is electrically connected with photovoltaic electric conversion component (4).

4. A gravity stored energy based grid service system as claimed in any one of claims 1 to 3, characterised in that, The first energy storage structure (21) includes: Structure main body (211) is provided with movable guide rail (212) arranged vertically on top; Gravity energy storage piece (213) is connected with the movable guide rail (212); First power generation piece (214) is connected with the gravity energy storage piece (213); Support top (215) is connected with the top of the structure main body (211);The end surface of the support top (215) away from the structure main body (211) is the support surface (22); When the gravity energy storage piece (213) is energized, the gravity energy storage piece (213) moves upward along the movable guide rail (212);When the gravity energy storage piece (213) moves downward, the gravity energy storage piece (213) generates electricity by moving downward along the movable guide rail (212).

5. A gravity stored energy based grid service system as claimed in claim 4, wherein, The movable guide rail (212) is provided with multiple, and there is height difference between adjacent movable guide rails (212).

6. A gravity stored energy based grid service system as claimed in claim 5, wherein, Multiple movable guide rails (212) are arranged from low to high in height, and then arranged from low to high.

7. A gravity stored energy based grid service system as claimed in claim 4 wherein, The first energy storage structure (21) further comprises a locking member (216) which can lock the position of the gravity energy storage member (213) when the structure body (211) moves to a preset position.

8. A gravity stored energy based grid service system as in claim 1, wherein, The guide rail structure (1) is spaced apart in any direction along the support surface (22) and multiple groups are provided; the gravity energy conversion vehicle (3) corresponds to the guide rail structure (1) one by one.

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