Method, recording medium and system for photovoltaic power generation using a soft slope

Abstract

The present application belongs to the technical field of soft slope development and utilization, and particularly relates to a method for photovoltaic power generation using a soft slope, which flexibly adjusts the water amount in the water tank according to the on-site soil condition, avoids slope instability, reasonably utilizes the land resources of a waste landfill site, and ensures a high power generation efficiency, and has very good social and economic benefits, and is particularly suitable for photovoltaic power generation projects of waste landfill sites around cities. The present application also provides a non-transient readable recording medium storing a program of the method and a system containing the medium, and the program can be called by a processing circuit to execute the above method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of soft slope development and utilization, and discloses a method, a recording medium and a system for photovoltaic power generation using a soft slope. BACKGROUND

[0002] Large cities generally have garbage collection and centralized processing landfill sites around them. In the early stage, the landfill site generally has a biogas collection or biogas power generation system for utilization. After the landfill site is closed (no new garbage is added), the biogas generated by the natural decomposition of the garbage will quickly decay, and because of the existence of residual biogas and leachate in the landfill body, the landfill site still needs to be specially collected and treated. Since the garbage pile body belongs to a soft slope, it not only has poor load capacity, but also has large uneven settlement. In addition, the slope of the garbage body is extremely unstable under natural conditions. Therefore, although the land resources occupied by the garbage landfill site are huge, the garbage landfill site is difficult to be comprehensively utilized and developed even after being closed and covered due to the above reasons, and the land resources cannot be effectively utilized.

[0003] Since large garbage landfill sites are generally distributed around cities, are close to the city power load center, and have a large occupied area, with the progress of photovoltaic power generation new energy technology in various scenarios and the huge demand for green renewable energy in cities and society, it is a possible way to utilize the land resources of the garbage landfill site for photovoltaic power generation. However, there are difficulties such as how to avoid the instability of the soft slope, uneven settlement of the foundation, effective degradation of the garbage body, and effective recovery of the land.

[0004] Moreover, even if the slope photovoltaic power plant is reconstructed from a non-garbage landfill site, it still has the technical difficulties of uneven load and easy slope instability. How to achieve the compaction and uniform settlement of the soft soil slope with a simple method is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] In view of the above problems, the present application provides a method for photovoltaic power generation using a soft slope, and the specific scheme comprises the following steps:

[0006] The soft slope is shaped into a stepped slope, a plurality of cubic-shaped water tanks are arranged on the steps of the slope, a float is arranged in the water tank, the upper surface of the float is kept horizontal in the floating state, a photovoltaic module is fixed to the upper surface, one side of the water tank is closely attached to the shaped slope foot to form a slidable support structure of the soft foundation slope body, and the water quantity in the water tank is determined according to the maximum active earth pressure causing the slope sliding according to the force balance principle.

[0007] This design allows the water quantity in the water tank to be adjusted according to the soil condition, so as to adjust the gravity of the compaction step surface and the support force for blocking the slope sliding in real time, and the waste of resources is reduced.

[0008] Preferably, the water tank can be made of concrete or PV material, the bottom outer wall is provided with a semispherical sliding limiter, and the inside is provided with an anchor rod in vertical direction, and the floating body is provided with an anchor rod hole matched with the anchor rod.

[0009] This design ensures that the floating body only floats up or sinks along the vertical anchor rod, without tilting, ensuring the safety of the photovoltaic module and the consistency of the elevation angle.

[0010] Preferably, the adjacent bottom of the water tank on the same elevation of the step is connected, and a water collecting and draining pipeline and a stop valve are arranged.

[0011] This makes all the water tanks on the same elevation of the step form a connected vessel with the same liquid level, ensuring that the modules floating on different water tanks on the same step are in the same height

[0012] Another aspect of the present application provides a non-transitory readable recording medium for storing one or more programs containing a plurality of instructions, which when executed, will cause the processing circuit to perform the above-mentioned method for generating electricity by photovoltaic power on soft slope.

[0013] Still another aspect of the present application provides a system for generating electricity by photovoltaic power on soft slope, comprising a processing circuit and a memory electrically coupled thereto, the memory is configured to store at least one program containing a plurality of instructions, and the processing circuit runs the program and can perform the above-mentioned method for generating electricity by photovoltaic power on soft slope.

[0014] Compared with the prior art, the present application has the following beneficial effects: the amount of water in the water tank can be flexibly adjusted according to the on-site soil conditions, the slope body is prevented from being unstable, the land resources of the landfill are reasonably utilized, and a relatively high power generation efficiency is ensured, which has very good social and economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the water tank uniformly distributed on the soft slope after the embodiment of the present application is shaped;

[0016] Figure 2 It is a schematic diagram of the sliding tendency of any layer of slope in the embodiment of the present application;

[0017] Figure 3 It is a schematic diagram of the installation of the floating body and the photovoltaic module in the embodiment of the present application;

[0018] Figure 4 It is a schematic diagram of the calculation of the equivalent active earth pressure of the water tank in the embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. The described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0020] The embodiment of the method for photovoltaic power generation on soft slope provided by the present application is as follows:

[0021] Taking a common large-scale landfill as an example, since the natural slope of the landfill is formed by the daily garbage accumulation for a long time before the landfill is closed, the slope has irregular and random inclination (as shown by the dashed line in FIG. 1). And due to the characteristics of the soft and layered garbage, the naturally formed accumulation body is prone to partial deformation, subsidence and even collapse under the external temperature change and rain and snow and other environmental and weather conditions, and the slope shape is not fixed. Figure 1

[0022] The garbage body with the natural unstable slope shape is shaped into a stepped platform, and a platform space for placing the combined water tank unit is shaped at the slope foot of each layer, and the slope foot is shaped into a vertical surface according to the height of the combined water tank unit to tightly fit the wall surface of the combined water tank.

[0023] The flat-bottom water tank unit with a limiting hemispherical body at the bottom is arranged tightly at the slope foot, and in this example, the outer dimensions of the unit water tank are 120×100×70 (length×width×height, cm), the water level is initially set to 50 cm, and the load of a single water tank plus the volume of water is 1350 kg (of which the self-weight of the water tank is 750 kg and the weight of the volume of water is 600 kg). Plus the floating body and the photovoltaic assembly, the final unit water tank can have a load of about 1500 kg. The load of 1500 kg is calculated according to the soil conditions as follows:

[0024] Ea (active earth pressure) acts at about 1 / 3 H from the wall bottom, and W is the gravity of △ABC (assumed sliding surface and sliding body), which is a function of angle θ. H is the height of the water tank, and the expression of Ea is:

[0025]

[0026] Ea: total active earth pressure acting on the wall of the water tank;

[0027] γ: the unit weight of the slope body at this point (the gravity per unit volume of garbage = the density of garbage soil × g, kgN / m3) ;

[0028] Ka: Coulomb active earth pressure coefficient, θ, β, δ (friction angle between the back of the water tank and the fill, about 30°), and the expression of Ka is:​ ) and (Internal friction angle) related;

[0029] The total active earth pressure Ea acting on the water tank wall and the closed triangle of the gravity W and the soil supporting reaction R form a force closure triangle, so as to achieve the force balance under the condition of slope supporting and the slope balance. The gravity W is about 1500 kgf.

[0030] The outer wall of the bottom of the water tank is provided with a hemispherical sliding limiter (2 groups of 4 in this example). The unit water tank is closely arranged through the internal connector, and the water tank and the hemispherical sliding limiter at the bottom thereof provide the active earth pressure (Ea) of the soft heap slope toe through the dead weight and the increased horizontal sliding friction, so as to form a slope stability supporting structure with fixed load (see Figure 1 ).

[0031] The floating body sliding anchor rod (with limiting function) is fixed in the vertical direction in the water tank, which is the upper and lower limiting sliding device of the inner wall of the water tank, and provides the upper and lower floating limiting and guide rail for the floating body platform with sliding anchor rod gap matching hole, and does not need other anchoring structures or devices. The floating body sliding anchor rod is symmetrically arranged in groups in the inner wall of the water tank, and in this example, 2 groups are symmetrically arranged along the length direction of the water tank, and there are 4 in total. The in-tank floating body is a PV material, which is an in-tank floating body platform with the matching hole of the fixed anchor rod, and provides a support platform for the water-floating photovoltaic module.

[0032] The floating photovoltaic module is arranged on the floating body in the water tank, and the cable, fixed connection and other accessories of the photovoltaic power generation module are connected.

[0033] The water tank unit connector (pipeline) connects the adjacent water tank units closely arranged above the bottom, so that the water level in the water tank units at the same elevation (or platform) is always consistent (in this example, the water surface height is 50 cm), so as to fix the relative position and elevation angle of the arrangement of the photovoltaic module, and further to ensure the photovoltaic power generation efficiency.

[0034] Finally, the combined water tank of each layer platform is replenished and water level controlled through the water replenishing unit (water storage tank, electromagnetic valve, pipeline), so as to adapt to the water level drop caused by evaporation of the water body. Similarly, the collection and drainage unit (pipeline) is used for collecting and discharging the water tank when it is flooded and leaks during rainfall.

[0035] The power supply and control unit of the system is used for providing power supply and control of the electric equipment such as electromagnetic valve of the water replenishing and drainage of each layer combined water tank.

[0036] The above method is applicable to the photovoltaic power generation application scene of the soft foundation of the landfill, such as gravel, soft soil and other mountain slope bodies, and other scenes requiring slope stability supporting and renewable energy development and utilization.

[0037] The details of this specification can depart from prior art concepts as understood by those skilled in the art.

[0038] Those skilled in the art will appreciate that embodiments of the present application can be further implemented as a method, a system, or a computer program product. Accordingly, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application can take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, magnetic disks, CD-ROMs, optical storage media, and the like) embodying computer readable program code.

[0039] The present application is described in reference to the flowchart illustrations and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 means for performing the function specified by the flowchart illustrations and / or block diagrams block or blocks.

[0040] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the flowchart illustrations and / or block diagrams block or blocks. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 means for performing the function specified by the flowchart illustrations and / or block diagrams block or blocks.

[0041] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flowchart illustrations and / or block diagrams block or blocks. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 means for performing the function specified by the flowchart illustrations and / or block diagrams block or blocks.

[0042] The program assembled by the above method steps and stored in a hard disk or other non-transient storage medium constitutes the "non-transient readable recording medium" technical solution of the present application; and the storage medium is electrically connected with a computer processor, and through data processing, the photovoltaic power generation using the soft slope body can be completed, which constitutes the "system for photovoltaic power generation using the soft slope body" technical solution of the present application.

[0043] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or the equivalent replacement of part of the technical features recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for generating photovoltaic power using soft slopes, characterized in that... Includes the following steps: The soft slope is modified into a stepped slope, and multiple cubic water tanks are set on the steps of the slope. Floating bodies are placed in the water tanks. The upper surface of the floating bodies is kept horizontal while floating. Photovoltaic modules are fixed on the upper surface. One side of the water tank is closely attached to the toe of the modified slope to form a sliding support structure for the soft foundation slope. The water volume in the water tank is determined by the maximum active earth pressure that causes slope slippage according to the principle of force balance.

2. The method for photovoltaic power generation using soft slopes according to claim 1, characterized in that, The water tank can be made of concrete or PV material, with a hemispherical sliding limiter on the bottom outer wall and vertical anchor rods inside. The float has anchor rod holes that fit with the anchor rods.

3. The method for photovoltaic power generation using soft slopes according to claim 2, characterized in that, The bottoms of adjacent water tanks located on the same elevation are interconnected and are equipped with a drainage pipe and a shut-off valve.

4. A non-transitory readable recording medium for storing one or more programs containing multiple instructions, characterized in that, When the instruction is executed, the processing circuit will perform a method for photovoltaic power generation using soft slopes as described in any one of claims 1-3.

5. A system for generating photovoltaic power using soft slopes, comprising a processing circuit and a memory electrically coupled thereto, characterized in that, The memory is configured to store at least one program, the program containing multiple instructions, and the processing circuit runs the program to perform a method for photovoltaic power generation using soft slopes as described in any one of claims 1-3.

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