JP2006066734A - Solar power generation unit and system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar power generation system which has a simple structure, which dispenses with a large-scale construction such as burying construction of a base, where a power generation capacity can be increased, and which can be installed at a place on which impact is applied. <P>SOLUTION: This solar power generation unit is obtained by arranging a power generator provided with a solar battery on a sleeper in a railway track through a shock elimination means which absorbs a shock. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a solar power generation apparatus that generates power using solar energy, in which a power generation unit is installed on a sleeper in a railroad track without using a stand or the like, and the generated power from the plurality of power generation units is centrally controlled. The control unit stores the generated power, or reversely flows to the commercial power system of the power company, and further uses the power transmission path from the power generation unit to the power load installed adjacent to the power generation unit. The present invention relates to a photovoltaic power generation system configured to supply.

  In addition, the present invention is used in this photovoltaic power generation system, and relates to a photovoltaic power generation unit provided in or along a railway track.

  In recent years, with increasing interest in global environmental problems, new energy technology using natural energy has attracted attention. As one of them, interest in systems using solar energy is high, and the spread of independent power sources for road traffic signs, lighting, etc., and solar power generation systems to houses has been accelerated.

  A solar power generation system obtains power supplied to an electric load by converting solar energy into electric power using solar cells, which are its main components, and supplies it in real time, or charges a battery or the like The electricity is stored in the means, or the power is supplied to the commercial power system of the electric power company in reverse power, and the electric power is purchased from the electric storage means or the electric power company when necessary.

  An example of such a device is a power load that is used even in the daytime, such as an air conditioner or refrigerator, for residential use, and the generated power is consumed in real time, the surplus is sold to the power company, and the necessary amount is consumed at night. There is a system to buy.

  Some road traffic signs, for example, store power in a storage battery during the day and turn on a light-emitting body such as an LED (light-emitting diode) with the power at night.

  The power generation capacity of solar cells used in such a solar power generation system varies from large to small, but for residential use, a solar power generation device of about 3 kW is placed using a roof, park lighting In, the solar cell module of about 100W is installed on the support pole that is erected with the foundation embedded, the solar cell of about 1W is integrally arranged on the main body case in the road traffic sign, the solar of about 10W A battery module is installed separately on a pole or guardrail.

  By the way, also in the railway, it is necessary for the management department to grasp various information such as the safety situation in the railway.

  One of them is the railway PV system.

  FIG. 8 shows an outline of this railway PV system.

  As shown in the figure, reference numeral 70 denotes a railroad track. A site for installing the photovoltaic power generation system J is prepared outside the railroad track 70, and a concrete foundation 74 is firmly installed on the ground on the site. . Then, a pedestal 72 made of a frame made of metal such as iron or stainless steel is installed on the concrete foundation 74.

  Further, the solar cell module 71 is attached to the pedestal 72, and the railroad equipment 73, for example, a safety equipment such as a traffic signal, is operated using the generated power as a power source.

  As a system using solar power generation similar to such a system, there is a railway facility in West Virginia, USA, as an example.

  Although not particularly illustrated, according to such a system, in order to secure power at night, the storage battery is charged together with power supply to the railway facilities during the daytime, and the storage battery is backed up at night when the solar cell does not generate power. Or it is common to comprise so that electric power can be supplied from the commercial power grid of an electric power company.

  In addition, there has been proposed an opening direction detection device that can automatically check the direction in which an orbital branching device is opened using a solar cell as a power source (see, for example, Patent Document 1).

Furthermore, as a traffic signal control system, a system has been proposed that, when a structural abnormality occurs on a railroad track or on a road, or the like, stops entering the hazardous area and promptly confirms the hazardous area. (See Patent Document 2).
JP 09-39793 A Japanese Patent Laid-Open No. 10-40493

  According to the solar power generation system as described above, the installation location of the solar cell varies, but what can be said in common is that depending on the required power generation capacity, the power generation area of the solar cell and sunlight are required. This means that there must be a place without obstacles that can receive light for hours.

  In particular, important safety equipment such as railway equipment should not be shut down due to power shortage, so it is important to ensure the sunshine conditions necessary for power generation.

  Thus, when using a solar power generation system as railway equipment, it is necessary to satisfy the two conditions of securing a place where good sunshine conditions can be obtained and securing a site where a platform for installing solar cells can be placed. did not become.

  However, since solar cells cannot generate electricity at night, it is indispensable to use a backup power source such as a storage battery or a commercial power system. However, even if a power failure occurs in the commercial power system, the diesel engine train can continue to run. There is a problem that even if a system for detecting the occurrence of an abnormality as in Patent Document 2 is provided, the information cannot be notified to a traffic control center or a traveling train.

  In view of such circumstances and circumstances, it is preferable to use an independent power supply system such as a combination of a storage battery and a solar battery. In this case, it is necessary to consider the installation location of the storage battery in addition to the photovoltaic power generation system.

  Also, foundations and mounts with sufficient strength are necessary so that the facilities of the photovoltaic power generation system do not fall on the track even in strong winds, but the mounts and foundations that support such a photovoltaic power generation system are large. It requires construction and labor for that.

  Furthermore, when the large-scale photovoltaic power generation system as described above is installed away from the track so as not to hinder the traveling of the train, there is a problem that it is necessary to secure an extra site near the track. Moreover, the installation area is not suitable for installation in places where the sun is insufficient such as in the shade.

  As a place to solve such a problem, a sleeper between rails in a railway track can be considered.

  In other words, the sleepers in the track are relatively free from obstacles, so they can receive sunlight, and many are densely arranged. It is suitable as a place where the installation conditions are not affected by the presence or absence of the site. However, on the other hand, the sleeper part has a problem that a strong impact force is generated when passing through the railway.

  Hereinafter, this point will be specifically described with reference to a partial cross-sectional view of the track shown in FIG.

  According to the track 70, the sleepers 81 are arranged on the track floor 83, which is the ground, gravel, or concrete, and the rails 80 on which the wheels of the vehicle travel are fixed on the sleepers 81 using fixing brackets or the like.

  According to the figure, the track floor 83 is made of concrete. At this time, in order to mitigate the vibration generated by the passage of the train and the impact force generated on the sleeper, the vibration isolating member 82 is provided on the lower surface of the sleeper 81. Is preferably installed.

  When a solar cell is installed on the sleeper 81, the central portion 81a on the surface of the sleeper is most suitable in consideration of securing the solar cell area and sunshine conditions.

  However, even if the above-mentioned vibration isolating structure is used, when the solar cell module is fixed on the sleeper, the sleeper and the solar cell module are in direct contact with each other. And the vibration absorbing structure between the fixed surfaces under the sleepers, whereby the impact force when passing through the train is transmitted to the solar cell module without being sufficiently attenuated.

  At this time, when a crystalline solar cell element with good power generation efficiency is used for the solar cell module, there is a problem that cracks are generated due to the impact and cause output failure.

  Therefore, the present invention has been completed in view of such problems of the prior art, and the purpose of the present invention is to provide a photovoltaic power generation system that has a simple structure and does not require large-scale construction such as foundation burial work. It is to provide.

  Another object of the present invention is to provide a photovoltaic power generation system capable of selecting and installing a place with good sunshine.

  Still another object of the present invention is to provide a solar power generation system capable of easily increasing the power generation capacity.

  Another object of the present invention is to provide a long-life and highly durable photovoltaic power generation system that can withstand an impact force when passing through a train.

  Furthermore, the objective of this invention is providing the solar power generation unit used for this solar power generation system of this invention.

  The photovoltaic power generation unit of the present invention is characterized in that a power generation unit including a solar cell is arranged on a sleeper in a railway track via a buffering buffer that absorbs an impact.

  Another photovoltaic power generation unit according to the present invention is provided with a buffer buffer means for absorbing an impact on a lid of a side groove of a railway facility wiring cable arranged along the railroad track instead of the sleepers in the railroad track. The power generation unit including the solar cell is arranged.

  The photovoltaic power generation system of the present invention has a plurality of sleepers in the railroad track arranged, and the output power of each power generation unit is input to one control unit, loaded through this control unit, or stored in power storage means. Or a reverse power flow to a commercial power system.

  In another photovoltaic power generation system of the present invention, the output power of the power generation unit arranged along the railroad track is input to the control unit, loaded through the control unit, stored in the power storage means, or into the commercial power system. It is configured to allow reverse flow.

  As described above, according to the photovoltaic power generation unit and the photovoltaic power generation system of the present invention, the railway disposed on the sleeper in the railway track by arranging the power generation unit including the solar cell or along the railway track. By arranging the power generation unit with solar cells on the lid of the side groove of the facility wiring cable, the power generation area will be distributed, so that the solar power generation unit can be mounted on the railroad track inside and outside As a result, it is possible to obtain a large amount of power without installing a stand or preparing a site around the railway track, and generating capacity. Can be added easily.

  In other words, in a special environment around the railway track, the light receiving area can be easily secured by using the sleepers between the rails of the railway track in order to ensure a sufficient light receiving area. Therefore, the required output can be easily ensured by connecting the solar cell modules installed on the sleepers.

  In addition, since it is installed in the railroad track, it is also secured to drainage during rainy weather, and flooding of the power generation section is unlikely to occur. In addition, the surroundings of the railway track are separated by a certain distance, so it is easy to get sunshine, it is easy to secure a sufficient light receiving area, and you can know the shaded part before installation, The solar cell module can be installed avoiding the place.

  Such an operational effect is the same even when a power generation unit equipped with a solar cell is arranged on the lid of a side groove of a railway facility wiring cable arranged along the railroad track instead of the sleepers in the railroad track. is there.

  Further, according to the present invention, the photovoltaic power generation unit is installed on the sleepers in the railway track, and the sleepers also serve as a base and a placement foundation of the power generation unit, thereby preventing floating due to wind pressure or the like. As a result, there was no need for buried foundations or separate foundations.

  Furthermore, in the present invention, as in the configuration described above, the power generation unit equipped with the solar cell is arranged via the buffering buffer means that absorbs the impact, thereby reducing the impact transmitted to the power generation unit. As a result, stress such as impact and vibration on the solar cell module can be reduced, the life can be improved, and a long-life and highly durable solar power generation system that can withstand the impact force when passing through the train can be provided.

  According to the present invention, the DC power generated by the solar cell is sold by flowing back to the commercial power system, and the power consumed by the power load is purchased from the commercial power system at night. , Part or all of the electricity bill can be covered by electricity sold in the daytime, and when a storage battery is connected, railway security equipment and communication equipment can be operated in an emergency such as when the power supply is cut off. For example, when an abnormality occurs, the traffic lights are lit in red, and a train powered by a diesel engine has also failed due to a power failure. Accidents such as can be prevented in advance.

  In addition, according to the present invention, by allowing the power generation unit and sleepers to be separated, the power generation unit can be installed and wired even after all the sleepers are installed, and there is no need to install a gantry. Since there is no risk of overturning due to wind pressure or natural wind when passing through the train, it can be used for short-term installation and removal, and is particularly suitable for power sources such as temporary detection devices, alarm devices, and sign displays.

  In addition, if the solar power generation unit of the present invention is combined with a low power consumption light emitter such as an LED to form a guide lamp for an orbit, the guide lamp will be blocked when there are people or obstacles on the track. The presence of obstacles can be sensed from a distance that the train floodlight does not reach, improving the safety of operation.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings schematically shown, taking as an example a case where a solar power generation system is installed on a sleeper in a railway track.

  FIG. 1 is a perspective view showing each member and a combination configuration thereof in an example of an embodiment of the photovoltaic power generation system of the present invention. 2A is a plan view showing the structure of the solar cell module used therein, and FIG. 2B is a cross-sectional view thereof.

  According to this example shown in FIG. 1, the photovoltaic power generation system S is composed of a photovoltaic power generation unit 1 and a control unit 2.

  The solar power generation unit 1 includes a sleeper 20 in a railroad track 70 and a solar cell module 11 installed on the sleeper 20.

  The control unit 2 performs control control for supplying generated power to the load or reversely flowing the load.

  A plurality of photovoltaic power generation units 1 are arranged adjacent to each other, and the generated power is collected to the control unit 2 through the transmission line 3, and the railway equipment 7 or the communication device 6 or the railway track monitoring camera which is a load as DC power as it is. 5 or supplied as AC power after DC-AC conversion.

  In addition, surplus AC power may be reversely flowed (power sold) to the commercial power grid 4 of the power company by performing grid interconnection.

  Furthermore, power storage means 57 such as a storage battery is provided in the control unit 2 or as a separate installation, whereby surplus power is used for charging, and power is supplied from the power storage means 57 to the load at night. You may do it.

  Regarding the photovoltaic power generation system S of the present invention, the photovoltaic power generation unit 1 will be described in more detail.

  Generally, railroad sleepers are installed at regular intervals along the track, and if there are no railroad crossings or the like, a considerably long distance can be installed continuously. Therefore, a large number of solar cell elements are used in series (36 to 333 series). Suitable for versatile photovoltaic systems.

  For example, an input voltage to a grid interconnection system generally used in a residential solar power generation system is 160V, which corresponds to a configuration in which approximately 333 solar cell elements are connected in series. Assuming that the size of one battery element is 100 mm square, when a solar cell element is made in a 6 × 6 array as a general roof solar cell module, an installation area of 0.36 square meters is required. Therefore, it is not easy to secure a place where a photovoltaic power generation system having a gantry supporting a solar cell module of this size is newly installed around the railroad track, or to perform construction therefor.

  However, if this arrangement is arranged in one row, the length is about 34 m, and the rail spacing (wide gauge standard gauge) used on each Shinkansen and some private railways is 1.435 m. Even if the effective light receiving area is 0.7 m of about 50%, it can be installed if there are 20 sleepers, and it is relatively easy to secure it as a place for installing the solar cell module.

  In addition, because of the nature of railroad tracks, the surrounding structures are separated from each other by a certain distance, so that solar cells are less likely to be shaded by the structures around the railroad tracks, which can prevent a decrease in power generation efficiency. In addition, it is also preferable that a structure that shields sunlight can be known in advance, and a solar cell module can be installed avoiding the structure.

  In addition, according to this example, the control unit 2 is described by taking as an example a configuration in which the control unit 2 is connected to a power transmission line (commercial power system 4) on a power pole through a power sale / purchase watt-hour meter 8 attached to a power pole of a power company. However, in a track that is not electrified, there is no such configuration.

  Next, the operation of the photovoltaic power generation system S will be described.

  The photovoltaic power generation unit 1 is connected in series every several adjacent power generation units to form one group.

  Specifically, although there are 14 photovoltaic power generation units 1 in the figure, two solar power generation unit groups in which 7 are connected in series are connected in parallel and input to the control unit 2. Configure as follows.

  Actually, since the minimum voltage input to the control unit 2 is determined in advance, the series-parallel number is determined so that the power generation voltage of the photovoltaic power generation unit 1 is equal to or higher than the voltage. Usually, in the case of grid connection to a commercial power grid, a series number of photovoltaic power generation units 1 is required so that an output voltage of approximately 100 to 160 V is obtained.

  The electric power generated by the photovoltaic power generation unit 1 in the daytime is input to the control unit 2, and the control unit 2 uses the input DC power as it is as DC power as a load as a railroad facility 7 or a communication device. 6 and the railroad track monitoring camera 5.

  Alternatively, it is supplied as AC power after DC-AC conversion. That is, it has a function of converting into AC power that can be grid-connected to the commercial power system, and surplus AC power is reversely flowed (sold) to the commercial power system 4. Alternatively, power storage means 57 such as a storage battery is provided in the control unit 2 or installed separately, and surplus power is used for charging.

  Next, the night when the power generation of the photovoltaic power generation unit 1 cannot be expected will be described.

  At night, the power generation of the solar power generation unit 1 stops, and the power consumption used by the railway equipment is purchased from the commercial power grid 4, but part or all of the electricity bill is covered by electricity sold in the daytime. Is called. Alternatively, power is supplied from the power storage means 57 to the load.

  As described above in detail, as a solar power generation system, a place with good sunshine conditions such as in a railroad track is compatible with the solar cell module, and the solar cell module 11 is mechanically fastened to the weight of the sleeper 20 or the ground. Can be installed easily without the need to bury the foundation.

  2-5 shows an example of embodiment of the structure of the photovoltaic power generation unit based on this invention.

  FIGS. 2A and 2B are a plan view and a cross-sectional view of the solar cell module, respectively, and FIG. 3 is a perspective view showing an assembled state.

  FIG. 4A is a partially enlarged view of the assembled state, and FIG. 4B is a model diagram for explaining the function of the shock absorbing means (shock shock absorbing mechanism) for absorbing the shock.

  First, the configuration of the solar cell module will be described.

  As shown in FIGS. 2A and 2B, the solar cell module 11 is provided with a light transmission plate 12 such as glass or resin on the light receiving surface, and a large number of solar cell elements 13 are EVA on the light transmission plate 12. Lamination is performed with a sealing material 14 made of resin (Ethylene-Vinyl Acetate) or the like.

  A weather resistant film 15 such as a Teflon (registered trademark) film, PVF (polyvinyl fluoride), or PET (polyethylene terephthalate) is attached to the non-light receiving surface which is the back surface.

  As the solar cell element 13, for example, a single crystal, polycrystal, or amorphous material such as a compound semiconductor made of silicon-based semiconductor or gallium arsenide is used, and they are electrically connected in series and / or in parallel. Yes.

  Further, a junction box 16 made of synthetic resin such as ABS resin or aluminum metal is bonded to the back surface of the solar cell module 11, that is, the weather resistant film 15, and connected to a terminal for taking out the output power of the solar cell module 11. The output is taken out by the transmitted power line 17.

  The light transmitting plate 12, the solar cell element 13, and the weather-resistant film 15 are attached to a rectangular main body with a frame 18 made of aluminum metal, SUS, or the like sandwiched between the sides. It plays the role of the fixing part for installation of the battery module 11. The frame 18 is useful for the purpose of protecting the end portions of the solar cell module 11 and improving the strength to increase the overall strength.

  Such a frame is made of a metal bending material such as iron, stainless steel, or aluminum, or a resin molded product such as FRP, and the assembly of the frames can be directly coupled with screws or rivets. The fixing is performed through an auxiliary member such as a plate, or by adhering to a light transmission plate 12 such as glass or resin. Moreover, it is good also as a structure which inserts the light transmissive board 12 in the integrally molded frame.

  Next, an embodiment of the solar cell installation structure of the solar power generation unit 1 in which the solar cell module 11 is installed on the sleeper 20 will be described.

  As shown in FIG. 3, the solar cell module 11 is installed through an impact buffering mechanism 25 on an upper part of a sleeper 20 made of concrete, metal such as iron, or wood.

  The shock absorbing mechanism 25 includes a bolt 21 for fastening to the sleeper 20, a spring 23 inserted into the bolt 21, and an elastic member 22 such as rubber or a spring.

  FIG. 4A is an enlarged view of a state in which the shock absorbing mechanism supports and fixes the solar cell module 11.

  As shown in the figure, the lower surface of the solar cell module 11 is supported by an elastic member 22 made of rubber or a spring, and inserted into the through hole 19 of the solar cell module 11 with the spring 23 inserted into the bolt 21. The spring 23, the solar cell module 11, and the elastic member 22 are fixed to the upper surface of the sleeper 20 so that the bolt 23 penetrates.

  With this configuration, the solar cell module 11 does not directly contact the bolt 21 and is attenuated by the elastic member 22 and the spring 23 until the impact force when passing through the train is transmitted from the sleeper 20 to the solar cell module 11. Is done.

  FIG. 4B shows the function of the damping as a viscoelastic model showing the deformation of the polymer material or the spring.

  As shown in the figure, according to the viscoelastic model when a rubber material is used for the elastic member 22, the spring 22a and the dashpot 22b are connected in parallel.

  And spring 22a and dashpot 22b are arranged as the 2nd elastic deformation part which supports the back side of solar cell module 11, and spring 23 which is the 1st elastic deformation part is arranged on the upper surface side of solar cell module 11. The solar cell module 11 is fixed so as to be movable between the spring 22 a and the dashpot 22 b arranged in parallel and the spring 21.

  According to such a configuration, since a large impact (arrow A in the figure) at the initial stage of passing through the train works as a force for pulling the spring 23 or a force for contracting the spring 22a, by supporting the solar cell module 11 via each spring, The impact force applied to the solar cell module 11 is alleviated.

  On the other hand, since each spring thereafter exerts a reaction force to return to the initial state, the solar cell module 11 is subjected to vertical vibration as indicated by an arrow B in the figure, which causes stress.

  With such a configuration, it is preferable to select the spring rate (spring constant) of each spring in accordance with the weight and size of the solar cell module.

  In this example, the elastic member 22 has not only the spring but also a dashpot 22b element in parallel with the spring 22a like a rubber material, so that the action of reducing the speed at which the spring 22a contracts and the speed at which the spring 22a expands works. Therefore, it is possible to suppress the vertical vibration more easily than to adjust only by the spring rate, and to reduce the stress on the solar cell module.

  By appropriately selecting the spring constant and the viscous damping coefficient in this way, the vibration can be damped rapidly.

  Moreover, since the solar cell module part is fastened to the sleepers with bolts 21, the solar cell module 11 can be easily installed and removed, so that it can be installed and removed in a short period of time. It is suitable for power supplies such as devices and sign displays.

  Another embodiment of the power generation unit will be described below.

  The solar power generation unit 51 shown in FIG. 5 has a structure in which the solar cell module 11 is attached to the sleeper 20 with the second elastic deformation portion as a sponge-like porous resin member 41 as an impact buffering mechanism.

  Furthermore, the contact area with the resin member 41 is reduced by making the upper surface of the sleeper 20 uneven. This is because the second elastically deformable portion is supported by the back surface of the solar cell module 11 in a larger area. For example, as shown in FIG. Eliminates the problem that the part bends more than others.

  Furthermore, by reducing the contact area as much as possible, the energy of the transmitted vibration is reduced, and the impact force that is absorbed by the resin member 41 and transmitted to the solar cell module is reduced as much as possible.

  The first elastic deformation portion and the bolt 21 are not particularly illustrated.

  The photovoltaic power generation unit 61 shown in FIG. 6 has a structure in which a solar cell fixing wire 31 is stretched over the sleeper 20 as a shock absorbing mechanism, and the solar cell module 11 is installed thereon. Is.

  With this structure, the impact transmitted to the solar cell module can be greatly reduced.

  In other words, the impact propagates through the object as a vibration wave, but the energy of the transmitted wave is made as small as possible by making the cross-sectional area as the transmission path as small as possible.

  The first elastic deformation portion and the bolt 21 are not particularly shown, but are fixed to the sleeper 20 with the bolt 21.

  As described above in detail, after the installation of the plurality of solar power generation units is completed, the power generation outputs thereof are collected and connected to the control unit, and the solar power generation system S is obtained.

  Specifically, as shown in FIG. 7, the output power of each photovoltaic power generation unit 91 to which a plurality of photovoltaic power generation units are electrically connected is transmitted to the control unit 2 through a transmission line 3a.

  As described in detail with reference to FIG. 1, each photovoltaic power generation unit group is connected in series with photovoltaic power generation units that can secure the minimum voltage required for input to the power conversion device 54 provided in the control unit 2. Is. The output power of each group of these photovoltaic power generation units is once collected by the control unit 2 through the transmission line 3a, connected in parallel, and then input to the power converter 54.

  The power converter 54 converts direct current power into alternating current power, adjusts the alternating current waveform so that it matches the power waveform of the commercial power system 4, and then reversely flows through the transmission line 3c to sell power or illuminate through the transmission line 3b. Electric power is supplied to the AC load 7 such as a lamp.

  Also, a method of providing a power storage means 57 such as a storage battery without being linked to the commercial power system 4, charging the generated power through the transmission line 3d, and supplying power to the load side as required There is also.

  Moreover, even if there is an empty area on the roof by combining the solar power generation unit 91 of the present invention and the solar power generation system in which the solar cell module is mounted on the roof of the station building, only the number of solar cell modules to be mounted there Then, it is possible to install the solar cell power generation unit installed in the orbit in a place where the solar cell element cannot be installed due to a shortage of the series number of solar cell elements by replenishing the series number of solar cell elements.

  Furthermore, although not shown in particular, if the solar power generation unit of the present invention is combined with a low power consumption light emitter such as an LED to form a guide lamp for an orbit, the guide lamp is used when there are people or obstacles on the track. As a result, the presence of obstacles can be detected from a distance far beyond the reach of the train projector.

  It should be noted that the present invention is not limited to the above-described embodiment, and various changes and improvements can be made without departing from the scope of the present invention.

  For example, according to this example, a configuration in which a solar cell module is incorporated in a sleeper has been described, but instead, in a plane that is continuously exposed to direct sunlight, such as a cover of a side groove of a wiring cable for railway facilities, etc. Applicable.

  Furthermore, according to the present invention, it is effective as a system that reduces the total power consumption in a place that is always used for railway safety, such as lighting around a railroad crossing and traffic lights.

It is a perspective view showing typically an example of an embodiment of a solar power generation system of the present invention. (A), (b) is a figure which shows the structure of the solar cell module of the solar power generation system which concerns on this invention, (a) is a top view, (b) is sectional drawing. It is a perspective view which shows the assembly structure of the photovoltaic power generation unit of the photovoltaic power generation system which concerns on this invention. (A), (b) is a figure explaining the fixing structure of the photovoltaic power generation unit of the photovoltaic power generation system based on this invention, (a) is a perspective view, (b) is sectional drawing which modeled the structure. is there. It is a perspective view which shows other embodiment of the photovoltaic power generation unit of the photovoltaic power generation system which concerns on this invention. It is a perspective view which shows other embodiment of the photovoltaic power generation unit of the photovoltaic power generation system which concerns on this invention. It is a block diagram which shows the electrical connection of the solar energy power generation system concerning this invention. It is a perspective view which shows typically the Example of the solar energy power generation system installed by the track side of the conventional railroad. It is sectional drawing explaining the structure of the track of a railway typically.

Explanation of symbols

1: Photovoltaic power generation unit 2: Control unit 3, 3a-3d: Transmission line 4: Commercial power system 5: Railway track monitoring camera 6: Communication equipment 7: Railway facility 8: Electricity sales / purchase energy meter 11: Solar battery Module 12: Light transmission plate 13: Solar cell element 14: Sealing material 15: Weather resistant film 16: Junction box 17: Transmission line 18: Frame body 19: Through hole 20: Sleeper 21: Bolt (first elastic deformation portion)
22: Elastic member (second elastic deformation part)
22a: Spring 22b: Dashpot 23: Spring 25: Impact buffer mechanism 31: Wire 41: Resin member 49: Convex portion 50: Sleeper 51: Power generation unit 54: Power conversion device 57: Power storage means 61: Solar power generation unit 70: Railroad track 71: Solar cell module 72: Mount 73: Railroad equipment 74: Foundation 80: Rail 81: Sleeper 82: Anti-vibration member 83: Track floor 91: Solar power generation unit J: Solar power generation system S: Solar power generation system

Claims (4)

A photovoltaic power generation unit, wherein a power generation unit including a solar cell is disposed on a sleeper in a railroad track through a buffering buffer that absorbs an impact. In place of the sleepers in the railway track according to claim 1, a solar cell is provided on the lid of the side groove of the railway facility wiring cable arranged along the railway track via a buffer buffer means for absorbing an impact. A solar power generation unit characterized by the arrangement of a power generation unit. A plurality of sleepers in the railway track according to claim 1 are arranged, and the output power of each power generation unit is input to one control unit, loaded through this control unit, stored in power storage means, commercial power A photovoltaic power generation system characterized in that the system is configured to allow reverse flow to the grid. The output power of the power generation unit arranged along the railroad track according to claim 2 is input to the control unit, and is loaded through the control unit, stored in the power storage means, or reversely flowed to the commercial power system. A solar power generation system characterized by

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