Distributed gravity energy storage power generation system and gravity energy storage system

Abstract

The application discloses a kind of distributed gravity energy storage power generation systems and gravity energy storage systems, comprising: upper stockyard, lower stockyard, transport train, train track, power generation unit;Power generation unit includes N power generation device, N is greater than or equal to 2, N power generation device is spaced apart along the train track, the transport train drives 1-N number power generation device in turn along transport direction, every transport train drives 1 number power generation device from the head carriage to the tail carriage during driving N number power generation device, transport train drives at least one of 1-N number power generation device, any power generation device in 1-N number power generation device is rotated before being driven by the transport train, the driving wheel of the power generation device is in rotating state.This application effectively smooths the fluctuation of power generation power by distributing multiple power generation devices and controlling the driving wheel to rotate in advance, reduces the influence of failure, enhances the reliability and scalability of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to a distributed gravity energy storage power generation system and a gravity energy storage system. BACKGROUND

[0002] Gravity energy storage is a technology that uses gravitational potential energy for energy storage and release. Its basic principle is: when electricity is cheap or surplus, the heavy object is lifted to a high position by electric power to store electric energy into gravitational potential energy; when electricity is needed, the heavy object is controlled to fall from the high position to drive the generator to convert gravitational potential energy into electric energy.

[0003] In the prior art, the gravity energy storage power generation system (such as vertical lifting type gravity energy storage or inclined railway type gravity energy storage) usually sets a large generator set at a single position of the system, and the heavy object drives the single generator to rotate and generate electricity through a mechanical transmission mechanism (such as a steel wire rope) during the falling process.

[0004] However, the single-motor gravity energy storage power generation system has the following problems:

[0005] 1. Large power fluctuation and high cost. The power generation of the single-motor gravity energy storage power generation system depends on the instantaneous speed of the heavy object falling. The acceleration, constant speed and deceleration of the heavy object will cause the output power of the generator to change dramatically, resulting in large voltage and frequency fluctuations. Complex power electronic devices are required for smoothing processing, and the system is complex and costly.

[0006] 2. High failure probability and high risk. The entire power generation system only sets one generator, and the power generation of the gravity energy storage system is different from that of the thermal power generation, which is mostly intermittent start-stop, so the failure probability is high. Once the generator or the transmission system fails, the entire power generation process will be interrupted, and the entire system cannot generate electricity during the entire maintenance period, which has a great impact on the entire system power generation.

[0007] 3. Difficulty in adjusting system capacity. The power generation capacity of the entire system is limited by the maximum capacity of the single generator. If the capacity needs to be expanded, a larger power generator must be replaced and the entire transmission system must be strengthened, which is difficult to modify and costly. SUMMARY

[0008] The present application provides a distributed gravity energy storage power generation system to solve the problems of large single-motor power fluctuation, high cost, high failure probability, high risk, and difficulty in adjusting system capacity in the existing gravity energy storage power generation system.

[0009] A distributed gravity energy storage power generation system, comprising: an upper stockyard, a lower stockyard, a transport train, a train track, and a power generation unit.

[0010] The upper stockyard and the lower stockyard are provided with an altitude difference.

[0011] The train track is connected with an upper stockyard and a lower stockyard;

[0012] The power generation unit comprises N power generation devices, N is an integer greater than or equal to 2, the N power generation devices are arranged along the train track in a sequence of 1 to N, an altitude difference is arranged between the No. 1 power generation device and the No. N power generation device, each power generation device comprises a driving wheel and a generator, and the driving wheel is in power connection with the generator.

[0013] The transport train is provided with L vehicles, L is an integer greater than or equal to 1, each transport train can load energy storage medium and run from the upper stockyard to the lower stockyard along the train track, each transport train comprises a head car and a tail car, and each transport train is provided with a driving structure, which is arranged to drive the driving wheel to rotate.

[0014] Before any of the No. 1 to N power generation devices is driven by the transport train, the driving wheel of the power generation device is in a rotating state, and at any moment during the process that each transport train drives the No. 1 power generation device from the head car to the No. N power generation device from the tail car, at least one of the No. 1 to N power generation devices is driven.

[0015] The distributed gravity energy storage power generation system has a power generation mode, in which the No. 1 to N power generation devices are sequentially driven to generate power by the first transport train in sequence when the power generation mode is initially started, and each of the No. 1 to N power generation devices is driven by the L vehicles when the power generation mode is running.

[0016] Preferably, the driving wheel of any power generation device M in the No. 2 to N power generation devices starts to rotate later than or at the same time as the driving wheel of the M-1th power generation device, and M is greater than or equal to 2 and less than or equal to N.

[0017] Preferably, the driving wheels of any adjacent S power generation devices in the No. 1 to N power generation devices start to rotate at the same time, and S is greater than or equal to 2 and less than or equal to N.

[0018] Preferably, any power generation device Q in the No. 2 to N power generation devices starts to rotate after any one of the No. 1 to Q-1 power generation devices is driven, and Q is greater than or equal to 2 and less than or equal to N.

[0019] Preferably, the driving wheels of the No. 2 to N power generation devices start to rotate in sequence.

[0020] Preferably, after the No. N power generation device is driven for the first time, the driving wheels of the No. 1 to N power generation devices remain rotating at the same time.

[0021] Preferably, after the No. 1 power generation device is driven for the last time, the driving wheels of the No. 1 to N power generation devices stop rotating in sequence.

[0022] Preferably, the rotation speed of each driving wheel of the power generation device is the same.

[0023] Preferably, during the process that each transport train drives the No.1 power generation device from the tail car to the No.N power generation device in the head car, at any moment during the process, the transport train simultaneously drives any two of the No.1-N power generation devices.

[0024] Preferably, during the process that the driving wheels of the No.1-N power generation devices are simultaneously rotating, multiple transport trains are simultaneously running between the No.1-N power generation devices.

[0025] The present application also provides a gravity energy storage system, which comprises the above-mentioned distributed gravity energy storage power generation system.

[0026] The distributed gravity energy storage power generation system of the present application effectively smoothes the power generation power fluctuation, reduces the fault influence, and enhances the system reliability and scalability by distributing multiple power generation devices and controlling the driving wheels to rotate in advance. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. 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 on the basis of these drawings.

[0028] Figure 1 It is a schematic diagram of the distributed gravity energy storage power generation system of the present application;

[0029] Figure 2 It is a partial schematic diagram of the distributed gravity energy storage power generation system of the present application;

[0030] Figure 3 It is a partial schematic diagram of the distributed gravity energy storage power generation system of the present application;

[0031] Figure 4 It is a schematic diagram of the transport train in the distributed gravity energy storage power generation system of the present application;

[0032] Figure 5 It is a schematic diagram of the power generation device in the distributed gravity energy storage power generation system of the present application. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more clear and understandable, the detailed description of the embodiments of the present application is made below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different ways from what is described herein, and with the same or similar results, and by one of ordinary skill in the art without departing from the scope of the present application, and therefore the present application is not limited to the details described below.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] like Figures 1-5 As shown, the present invention provides a distributed gravity energy storage and power generation system, comprising: an upper material yard 50, a lower material yard 60, a transport train 10, a train track 20, and a power generation unit.

[0040] The upper material yard 50 and the lower material yard 60 are equipped with an elevation difference;

[0041] Train track 20 connects the upper material yard 50 and the lower material yard 60;

[0042] The power generation unit includes N power generation devices 40, where N is an integer greater than or equal to 2. The N power generation devices 40 are arranged at intervals along the train track 20 in a sequence from 1 to N. There is an altitude difference between power generation device 1 and power generation device N. Each power generation device 40 includes a drive wheel 41 and a generator 42, and the drive wheel 41 and the generator 42 are connected by a power source.

[0043] The transport train 10 is equipped with L vehicles, where L is an integer greater than or equal to 1. Each transport train 10 can carry energy storage medium 80 and run along the train track 20 from the upper material yard 50 to the lower material yard 60. Each transport train 10 includes a front car 10a and a rear car 10b. Each transport train 10 is equipped with a drive structure 11a, which is configured to drive the drive wheel 41 to rotate.

[0044] Before being driven by the transport train 10, the drive wheel 41 of any of the power generation devices 40 from 1 to N is in a rotating state, and at any time during the process of each transport train 10 driving power generation device 1 from the front car 10a to the rear car 10b to drive power generation device N, at least one of the power generation devices 1 to N is driven.

[0045] The distributed gravity energy storage power generation system has a power generation mode, after the power generation mode is started, any one of 1-N power generation devices 40 is driven by the transport train 10 in advance, the driving wheel 41 of the power generation device 40 is started to idle, reaches a preset rotating speed, during the period, the generator 42 operates as a motor, when the power generation mode is started, the first train L1 of the L transport trains contacts and drives the driving wheel 41 of the first power generation device 40-1, the generator 42 of the first power generation device 40-1 is driven to enter the power generation state, with the first train L1 continuing to run, the first train L1 is separated from the first power generation device 40-1, and then contacts and drives the second power generation device 40-2, and the same is true for driving the N power generation device 40, through the operation of the first train L1, the first power generation device is driven by the first train L1 in sequence, in the stable operation state of the system, the driving wheel 41 of all power generation devices 40 is continuously in the rotating state, the second train L2 to the Lth train drives each of the first to N power generation devices, in the stable operation stage, for any one power generation device 40, the working state is driven by the head car to the tail car of a single transport train or sequentially driven by multiple transport trains, that is, it is first driven by the first train L1, then driven by the second train L2, and so on, through reasonable scheduling, multiple transport trains form uniform distribution on the power generation section 20a, so that the entire power generation system can select multiple power generation devices to be driven to generate power at the same time, the total output power of the system is the stable superposition of the power of these distributed power sources, so that smooth and continuous power output can be realized, it should be noted that the L transport trains in the application are not limited to all vehicles of the entire power generation system or a fixed number, but the number of vehicles that need to be dispatched according to the required power generation power, that is, the L transport trains are less than or equal to all vehicles of the entire power generation system, which can be dynamically adjusted according to the actual scheduling, when the power generation mode is running, each power generation device in 1-N can be driven by each of the L transport trains participating in power generation.

[0046] In an embodiment of the application, the driving wheel start-up rotating time of any power generation device M in 2-N power generation devices is later than or equal to the driving wheel start-up rotating time of the M-1th power generation device, M is greater than or equal to 2 and less than or equal to N, this setting avoids the demand for energy when all power generation devices start at the same time, reduces the power distribution load and cost when the system starts, makes the control logic more orderly and energy-saving, and improves the flexibility and economy of the system operation.

[0047] In one embodiment of the present application, the driving wheels of any adjacent S power generation devices numbered 1-N are simultaneously started to rotate, S is greater than or equal to 2 and less than or equal to N, the power generation devices can be grouped and managed according to the length of the transport train and the number of power generation devices to be simultaneously driven, and the power generation devices are simultaneously started in a group, so that the synchronization time of the power generation devices to be simultaneously driven is reduced, the transport train runs more smoothly, the power generation devices generate power more stably, and the stability of the system operation is improved.

[0048] In one embodiment of the present application, any power generation device Q numbered 2-N is started to rotate after any one of the power generation devices numbered 1 to Q-1 is driven, Q is greater than or equal to 2 and less than or equal to N, this arrangement further optimizes energy consumption, ensures that the power generation device is started only after one or more power generation devices in front are driven, and avoids energy waste caused by disordered starting of the power generation devices, in another embodiment of the present application, the driving wheel of the power generation device Q is started to rotate after the two to four power generation devices in front of the power generation device Q are driven, this arrangement ensures that the driving wheel of the power generation device Q has sufficient time to accelerate to the target rotating speed, and avoids waiting for waste of energy caused by too early starting of the power generation device, which is a better practice way of comprehensively considering operation difficulty and cost, in another embodiment of the present application, the driving wheel of the power generation device Q is started to rotate after the one power generation device in front of the power generation device Q is driven, in this arrangement, the driving wheels of two adjacent power generation devices are sequentially started to rotate in a relay mode, and energy waste is maximally saved.

[0049] In one embodiment of the present application, the driving wheels of the power generation devices numbered 2-N are sequentially started to rotate, this mode provides the simplest and most reliable sequential control logic, is easy to implement and stable, and is a better practice way of stable control and energy saving.

[0050] In one embodiment of the present application, after the power generation device numbered N is first driven, the driving wheels of the power generation devices numbered 1-N are simultaneously kept rotating, in this arrangement, when the system enters a stable operation period, all the driving wheels are kept rotating, so that efficient energy conversion can be immediately performed when any transport train arrives at any position, continuous and stable power generation is ensured, and the power generation efficiency of the system is maximized.

[0051] In one embodiment of the present application, after the power generation device numbered 1 is last driven, the driving wheels of the power generation devices numbered 1-N are sequentially stopped, and sequential shutdown can realize smooth and safe shutdown of the overall power generation system, in another embodiment of the present application, the timing of stopping the rotation of the driving wheels of each power generation device can be that, after the power generation device numbered 1 is last driven, the driving wheels of the power generation devices numbered 2-N are stopped after being driven by the transport train, in this way, the system can be stopped in the most energy-saving mode, and energy is finely managed.

[0052] In one embodiment of the present application, the rotation speed of the driving wheel of each power generation device is the same, and the driving wheel of each power generation device has the same rotation speed before and / or during driving, which can simplify the control strategy of the overall power generation system, reduce the complexity of the overall power generation system, and make the transport train run at a uniform speed in the power generation section.

[0053] In one embodiment of the present application, during the period from driving the No. 1 power generation device to driving the No. N power generation device from the tail car of the transport train, the transport train drives any two of the No. 1-N power generation devices at the same time, which ensures that the transport train has at least two power generation devices in contact with it in the No. 1-N power generation device track section, runs more smoothly, and at least two power generation devices are driven, so that the superposition effect of the total output power is more significant, the power curve is extremely flat, and the stability and reliability of the overall power generation system are further enhanced.

[0054] In one embodiment of the present application, as shown in Figure 3 During the period when the driving wheels of the No. 1-N power generation devices are rotating at the same time, multiple transport trains run between the No. 1-N power generation devices at the same time, which can maximize the utilization of equipment resources and energy, maximize the output power, and maximize the utilization of system design capacity. In one embodiment of the present application, L is an integer greater than or equal to 2, and L transport trains can be dispatched at intervals. Since the speed of each transport train after driving the power generation device can be adjusted by the driving wheel of the power generation device, multiple transport trains dispatched at intervals can maintain this interval G (the size of the interval G can be controlled by the interval time of dispatching), so that multiple transport trains do not interfere with each other and run in an orderly and stable manner.

[0055] The distributed gravity energy storage power generation system is driven by a plurality of power generation devices in turn by a transport train, the driving wheel of each power generation device is started to rotate in advance before being driven, so that the generator can quickly enter the high-efficiency power generation state when the driving structure of the transport train drives the driving wheel, avoiding the low-efficiency area of the motor from zero acceleration start stage in the existing scheme, thereby improving the overall energy conversion efficiency of the system, and the plurality of power generation devices are distributed along the train track 20, the single energy release process in the existing single motor gravity energy storage power generation scheme is decomposed into the superposition of a plurality of small power segments from a large power pulse, when the plurality of power generation devices are driven, the overall power generation system can maintain stable and smooth power output, greatly weakening the power fluctuation, significantly improving the quality of grid-connected power, reducing the impact on the power grid and the dependence on additional voltage and frequency stabilizing equipment, when a single power generation device in the system fails, it can be repaired or replaced alone during maintenance, greatly enhancing the reliability and availability of the overall power generation system, the power generation capacity of the overall system can be adjusted by adjusting the mass of the loaded energy storage medium, the power of the single power generation device, and the number of power generation devices, and the capacity adjustment is flexible and fast, which can match different power demand and expansion demand.

[0056] As shown in the embodiment of the present application, Figure 4 The transport train 10 includes a plurality of carriages 11, the plurality of carriages 11 can be flexibly connected, each carriage 11 is provided with at least one / multiple wheels for guiding the transport train 10 to run on the train track 20, the carriage 11 is provided with the loadable energy storage medium 80, the structure form can be set according to the form of the energy storage medium 80, for example, it can be a flat plate type or a compartment type, the number of carriages 11 loaded with the energy storage medium 80 can also be adjusted according to the demand of the energy storage system, the plurality of carriages 11 are flexibly connected, the flexible connection of the present application is not limited to a specific connection structure, the flexible connection structure can adopt the conventional transport train connection structure in the art, for example, the classic "Jan type coupler" connection or the universal joint connection or the flexible rope connection, as long as the two adjacent carriages can realize the deflection / oscillation in the horizontal and / or vertical directions after being connected, it is the flexible connection of the present application, the flexible connection can make the transport train 10 better adapt to different terrains to realize turning and / or downhill, in an embodiment of the present application, the transport train 10 is optionally provided with a driving structure 11a to drive the driving wheel 41 of the power generation device 40 to rotate, the driving structure 11a can be provided as a driving plate or a driving engagement / connection piece, which can be integrally formed with the carriage 11 or can be a separate part provided on the carriage 11, the way of being provided on the carriage 11 can adopt fixed connection or detachable connection for easy maintenance.

[0057] In one embodiment of the present application, the structure of the train track 20 can be set according to the actual terrain, for example, it can be set as a single track, a double track or other forms. The track can be composed of a plurality of segments of straight tracks and curved tracks, and the laying method can be determined according to different terrains. One laying method can be as follows: a part of the track can be laid on the surface of the mountain and / or a part of the track can be laid on the support. The track laid on the surface of the mountain can be laid after the land is leveled, and the laying operation can refer to the existing track laying construction specification. The support can be a man-made metal support frame or a concrete support column. The multiple laying methods should be adjusted and combined according to the terrain. Since the upper stockyard 50 and the lower stockyard 60 have a height difference, the train track 20 not only connects the upper stockyard 50 and the lower stockyard 60, but also adapts to the terrain of the mountain. In the height direction, it is composed of one or more segments of the uphill segment, the downhill segment and the horizontal segment. In one embodiment, at least one segment of the train track 20 is set as the downhill segment, that is, the altitude gradually decreases in the height direction. In another embodiment, in addition to the downhill segment, the train track 20 can selectively set the horizontal segment and / or the uphill segment, that is, in the track with the overall trend of downhill, a part of the track can be the horizontal segment and / or the uphill segment, so that the terrain can be better adapted. The transport train 10 can run from the upper stockyard 50 to the lower stockyard 60 through the guidance of the train track 20. Among the entire train track 20, the interval segment of the No. 1 power generation device 40-1 to the No. N power generation device 40-N can be set as the power generation segment 20a, and the remaining segments can be set as the guidance segment (not shown in the figure) that can guide the operation of the transport train 10. In one embodiment, the power generation segment 20a is set as the downhill segment, and the altitude of the power generation segment 20a gradually decreases, that is, the altitude of the No. 1 power generation device to the No. N power generation device gradually decreases in the direction of the transport train. This setting makes each power generation device fully utilize the slope potential energy of the track at the location, realizes the grading and efficient conversion of the gravitational potential energy, conforms to the natural law of energy release, optimizes the energy conversion process from the physical layout, and the guidance segment can be similarly set as the power generation segment 20a. Of course, in other embodiments, the power generation segment 20a and / or the guidance segment can be set as one or more segments of the uphill segment, the downhill segment and the horizontal segment according to the terrain. In one embodiment of the present application, the driving device 30 is further arranged in the guidance segment of the train track 20. The driving device 30 is arranged to drive the transport train 10 to run, so that the transport train 10 can smoothly enter the power generation segment 20a and / or enter and exit the lower stockyard 60 / upper stockyard 50. The power generation segment 20a generally does not arrange the driving device 30. Of course, in special cases, for example, in complex terrain conditions, in order to ensure the smooth running of the transport train 10, the driving device 30 is arranged in the power generation segment 20a, that is, the driving device 30 is arranged between the No. 1 power generation device and the No. N power generation device.

[0058] In one embodiment of the present application, the energy storage medium 80 can be set as liquid, solid or solid-liquid combination. In one embodiment, when the energy storage medium 80 is liquid or bulk material, the transport train 10 can complete the loading and unloading of the energy storage medium 80, for example, the transport train 10 uses side unloading or rotary unloading or opens the unloading port to complete the unloading, and the loading uses a feeder to transport the energy storage medium 80 to the transport train 10. In another embodiment, when the energy storage medium 80 is solid, a transfer device can be used for loading and unloading. The transfer device can be a transfer car, a hoisting device, etc. In one embodiment of the present application, the energy storage medium 80 is set as an energy storage weight. The energy storage weight can be prefabricated into a standard block, such as a reinforced concrete block or a metal block or a filler block, etc. The shape can be set as a rectangle. The energy storage weight can be provided with a structure or member facilitating clamping / stacking. The energy storage weight can be loaded and unloaded by a hoisting device 70.

[0059] In the present application, the power generation device 40 is arranged to convert the gravitational potential energy of the transport train 10 and / or the energy storage medium 80 into electrical energy, which includes a driving wheel 41 and a generator 42, and the driving wheel 41 is power connected with the generator 42. In an embodiment of the present application, the generator 42 is a permanent magnet synchronous motor. Therefore, after the driving wheel 41 is driven by the transport train 10, the driving wheel 41 can drive the generator 42 to generate electricity, and the generator 42 can also drive the driving wheel 41 to rotate. Since the permanent magnet synchronous motor can be precisely vector controlled through a frequency converter, the electromagnetic torque can be quickly and accurately adjusted. When the transport train has not arrived, the frequency converter drives the permanent magnet synchronous motor to operate as an electric motor, so that the driving wheel 41 rotates to the target speed in advance. When the transport train contacts and drives the driving wheel 41, the permanent magnet synchronous motor enters the power generation state. Through real-time feedback adjustment of the electromagnetic torque (for example, increasing the torque to increase the braking force when the vehicle speed is too fast, and reducing the torque to reduce the braking force when the vehicle speed is too slow), a dynamic braking force balanced with the gravitational acceleration component of the transport train can be generated, so that the transport train can stably slide at a preset speed, and the mechanical energy captured in this process can be efficiently converted into electrical energy. In other embodiments, the generator 42 can also be arranged as other types of motors as long as it can simultaneously realize power generation driven by the driving wheel and driving the driving wheel to rotate. For example, in an embodiment, the generator 42 is a double-fed induction generator, and its working principle is similar to the above-mentioned permanent magnet synchronous motor, which will not be described here. It should be noted that the structure of the driving wheel 41 driving the generator 42 to generate electricity after receiving power in the present application is not limited specifically. For example, in a common implementation, the driving wheel 41 can drive the main shaft of the generator 42 to rotate to generate electricity. Alternatively, the driving wheel 41 and the generator 42 can use magnetic coupling to realize non-contact power transmission. The driving wheel 41 can drive the main shaft of the generator 42 to rotate in multiple ways, for example, it can directly drive the main shaft of the generator 42 to rotate, or it can drive the main shaft of the generator 42 to rotate through an intermediate transmission member. Those skilled in the art can know that any connection mode that can transmit the rotational power of the driving wheel 41 to the generator 42 to make it generate electricity is power connected with the generator 42. It should also be noted that the driving mode and / or power transmission mode of the driving wheel 41 of the power generation device 40 in the present application is not limited specifically. As long as the transport train 10 can drive the driving wheel 41 of the power generation device 40 to rotate, for example, friction drive, gear drive, rack and pinion drive, etc. can be used. Figure 5As shown, in one embodiment of the present application, the driving wheel 41 can be in contact with the driving structure 11a (driving plate) of the transport train 10 through the action of a tensioning mechanism 43 to achieve friction driving, the driving wheel 41 is arranged as a friction wheel, which can be made of metal or rubber, or composite material, in another embodiment, for example, the power generation device in the applicant's prior application CN202411805892.2 can be used, or the power generation device in CN202411805892.2 is combined with the prior art to adjust, for example, the tensioning mode is adjusted to hydraulic or electric tensioning mode, the generator arrangement mode is vertical or horizontal, the driving wheel is arranged inside or outside the track, etc.

[0060] In the present application, the driving device 30 is arranged to drive the transport train 10 to run on the train track 20, the driving device 30 can be selected from the train driving device known to those skilled in the art in the prior art, for example, it is similar to the power generation device 40, which adopts a friction driving wheel type to drive the transport train 10 to run, or adopts a gear drive or rack and pinion drive mode, etc., in one embodiment, for example, the driving device structure in the applicant's prior application CN202320067168.9 can be referred to, which adopts a friction driving wheel type driving mode, the friction driving wheel can be arranged inside the train track 20 / transport train 10 (built-in type) as in CN202320067168.9, in other embodiments, the friction driving wheel can also be arranged outside the train track 20 / transport train 10 (external type).

[0061] In summary, the distributed gravity energy storage power generation system of the present application effectively smooths the power generation power fluctuation by distributing multiple power generation devices and controlling the driving wheel to rotate in advance, reduces the influence of failure, and enhances the system reliability and scalability.

[0062] The technical features of the above-mentioned embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the present application.

[0063] The above-mentioned embodiments only express several implementation ways of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A distributed gravity energy storage power generation system, characterized by, The application relates to a distributed gravity energy storage power generation system. The application relates to a distributed gravity energy storage power generation system. The application relates to a distributed gravity energy storage power generation system. The application relates to a distributed gravity energy storage power generation system. The application relates to a distributed gravity energy storage power generation system. The application relates to a distributed gravity energy storage power generation system. The application relates to a distributed gravity energy storage power generation system. The application relates to a distributed gravity energy storage power generation system.

2. A distributed gravity energy storage power generation system according to claim 1, wherein, The application relates to a distributed gravity energy storage power generation system.

3. A distributed gravity power storage system according to claim 1, wherein, The application relates to a distributed gravity energy storage power generation system.

4. A distributed gravity power storage system according to claim 1, wherein, The application relates to a distributed gravity energy storage power generation system.

5. A distributed gravity power storage system according to claim 1, wherein, The application relates to a distributed gravity energy storage power generation system.

6. A distributed gravity power generation system according to claim 1, wherein, The application relates to a distributed gravity energy storage power generation system.

7. A distributed gravity power storage system according to claim 1, wherein, The application relates to a distributed gravity energy storage power generation system.

8. A distributed gravity power generation system according to any one of claims 1-7, characterized in that, The application relates to a distributed gravity energy storage power generation system.

9. A distributed gravity power generation system according to claim 1, wherein, The application relates to a distributed gravity energy storage power generation system.

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