JP5966106B1 - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend the life by eliminating power storage based on a chemical reaction, to reduce the resources by enabling reuse, and to contribute to the overall cost reduction. A float member 2 that floats on a water surface Wu by winding a wire member 3w having one end 3ws coupled to the float body 2 and passing through guide portions 3ga, 3gb. A float lifting / lowering means 3 that floats down to a depth D and floats the float body 2 that has been submerged to a predetermined depth D by being drawn out from the winding portion 3r, and an electric motor 4m that rotationally drives the winding portion 3r in the winding direction Fr. And energy conversion means 4 having a generator 4g that generates electricity based on the rotation of the winding portion 3r in the feeding direction Ff, and at least the energy conversion mode 4 in which the generated power Pe is supplied to the energy conversion means 4 to store electricity A mode switching means 5 for switching to a discharge mode for taking out the stored electric power Pe from the conversion means 4 and making it usable is provided. [Selection] Figure 1

Description

  The present invention relates to a power supply system suitable for use when supplying generated power from a renewable energy power generation facility.

  Generally, a renewable energy power generation facility, for example, a solar power generation facility, includes a power generation unit using a solar power generation panel, and a power storage device that temporarily stores generated power obtained from the power generation unit, Usually, a storage battery (secondary battery) is used for this power storage device.

  Conventionally, as this type of power storage device, a power storage system disclosed in Patent Document 1 and Patent Document 2 is known. The power storage system disclosed in Patent Document 1 is intended to efficiently use all of a plurality of battery packs in parallel. Specifically, all the batteries of the plurality of battery packs are used. A charge switch, discharge switch, bidirectional DC / DC converter, and power storage system controller for controlling charge / discharge in parallel by connecting the pack to an external circuit, and charging current with one set of rated charge current value per battery pack Set the rated charging current value as the initial value of the command value and start charging.After that, monitor the charging current of each battery pack after a predetermined time and subtract the maximum value from the charging current command value. A precharge is performed so as to continue charging by adding a rated charging current value and setting a new charging current command value.

  In addition, the power storage system disclosed in Patent Document 2 is intended to effectively use a DC power supply device including a storage battery in a power generation system that uses solar power generation means. Specifically, DC power supply using a storage battery that stores a part of the DC power generated by the solar power generation means and the DC power converted from the AC power from the power system and discharges the DC power. DC power supplied from the DC power supply means is converted to AC power and supplied to the load device, and power consumption detection means for detecting the power consumption of the load device is provided. The supply means controls the supply of DC power to the DC / AC conversion means based on the power consumption of the load device detected by the power consumption detection means.

JP 2014-90595 A Japanese Patent Laying-Open No. 2015-65770

  However, the above-described conventional power storage system (power storage device) using a storage battery has the following problems to be solved.

  First, since a storage battery (secondary battery) stores electricity based on a chemical reaction, the storage battery (secondary battery) is easily deteriorated, and the general lifetime at the present time is said to be about 5 years. Moreover, since storage batteries that have reached the end of their life contain chemical substances, even if some of the parts can be reused, many are subject to disposal, and disposal after the end of life becomes difficult.

  Second, in the production of storage batteries, the use of relatively rare parts and materials is not limited, and installation space for installing products is necessary. Space is forced. In addition, power loss associated with power storage is likely to occur, so there is a limit to increasing power storage efficiency.

  An object of the present invention is to provide a power feeding system that solves such problems in the background art.

  In order to solve the above-described problem, the power supply system M according to the present invention includes a float body 2 that floats on the water surface Wu when the power supply system that supplies the generated power Pe from the renewable energy power generation facility E, and the float body. 2 is connected to one end 3ws, and the wire member 3w passed through the guide portion 3ga is wound around the winding portion 3r and the float body 2 floating on the water surface Wu is submerged to a predetermined depth D. Float lifting / lowering means 3 for levitating the float body 2 drawn out from the portion 3r and sinking to a predetermined depth D, the electric motor 4m for rotating the winding portion 3r in the winding direction (Fr), and the feeding direction of the winding portion 3r The energy conversion means 4 having a generator 4g that generates power by rotating (Ff) and the use of supplying the generated power Pe to the power usage area Au when the generated power Pe is equal to or higher than the set power. A power storage mode in which the generated power Pe is supplied to and stored in the mode and / or the energy conversion means 4, and the depth D (Dd) of the float body 2 detected by the float body depth detector 16 when the generated power Pe is less than the set power ) Is a discharge mode in which the stored power Pr is taken out from the energy conversion means 4 when the set depth Dh1 is equal to or greater than the set depth Dh1, and the generated power Pe is less than the set power and the float depth D (Du) Is a power supply mode in which the commercial power Pc supplied from the commercial power supply 15 is supplied to the power usage area Au when the power is less than the set depth Dh2, or the generated power Pe is equal to or higher than the set power and the depth D (Dm ) Has a control system 6 that can be switched to a power selling mode in which power is sold to the commercial power source 15 side when the depth Dm is equal to or greater than the limit depth Dm.

  In this case, according to a preferred aspect of the invention, the guide portions 3ga... Can include pulley mechanisms 11... (11a...) That hang the wire members 3w by being fixed to the water bottom Wd and / or the ground Gw. The water surface Wu can include at least one or more of the seawater surface (Wu), the lake surface, and the water storage surface. In addition, the renewable energy power generation facility E can include at least one or more of a solar power generation facility Es, a wind power generation facility, a geothermal power generation facility, a hydropower generation facility, and a seawater power generation facility.

  According to the power feeding system M according to the present invention having such a configuration, the following remarkable effects can be obtained.

  (1) Since energy storage based on a chemical reaction is eliminated and energy is stored by an energy storage unit configured by a simple mechanical member, it is difficult to deteriorate and a long life can be achieved by performing maintenance. In addition, since mechanical members can use general metal materials such as steel materials and stainless steel materials, many of them can be reused and resource saving can be achieved.

  (2) Since the energy storage means can be configured by taking advantage of the natural environment such as in the sea or in the lake, the installation space such as private land can be secured with a small area, and it can be configured as a simple mechanical member. The overall cost can be reduced. In addition, energy loss associated with power storage can be suppressed, which can contribute to improvement of power storage efficiency.

  (3) Since the generated power Pe from the renewable energy power generation facility E is used as the generated power, even if the generated power Pe is easily affected by natural phenomena such as weather, uneven power supply on the time axis can be eliminated. The power supply can be equalized and stabilized.

  (4) When configuring the control system 6, the generated power Pe is less than the set power amount, and the depth D (Dd) of the float body 2 obtained from the float body depth detector 16 is greater than or equal to the set depth Dh1. In some cases, a function of taking out the stored electric power Pr from the energy conversion means 4 and switching to a discharge mode for supplying to the electric power usage area Au is provided, so that the necessary stored electric power Pr can be reliably ensured when necessary, and stability and reliability can be ensured. A high system can be constructed.

  (5) When the control system 6 is configured, the generated power Pe is less than the set power amount, and when the depth D (Du) of the float body 2 is less than the set depth Dh2, it is supplied from the commercial power supply 15. When the commercial power Pc is switched to the power supply mode for supplying the commercial power Pc to the power usage area Au, it can be used in combination with the commercial power supply 15 and the generated power Pe and the stored power Pr are insufficient with respect to the required amount. Even so, it is possible to build a highly flexible system that can be used with peace of mind, such as being able to reliably supply power.

  (6) When the control system 6 is constructed, when the generated power Pe is equal to or greater than the set power amount and the depth D (Dm) of the float body 2 is equal to or greater than the limit depth Dm, it is sold to the commercial power supply 15 side. Since it has a function to switch to the power selling mode, the power can be sold to the commercial power source 15 even when excessive power is generated in the generated power Pe and the amount of stored electricity (energy), avoiding unnecessary energy loss and saving energy. And further improve the economy.

  (7) According to a preferred embodiment, if the guide portion 3ga... Includes the pulley mechanism 11 (11a...) That spans the wire member 3w by being fixed to the water bottom Wd and / or the ground Gw, the structure is relatively simple. Since it can implement, the operation | movement which sinks the float body 2 in water and the operation | movement which floats the float body 2 in water can be performed reliably and smoothly.

  (8) According to a preferred embodiment, the water surface Wu can include at least one or more of the sea surface (Wu), the lake surface, and the water storage surface. Renewable energy power generation equipment E includes at least one or more of solar power generation equipment Es, wind power generation equipment, geothermal power generation equipment, hydroelectric power generation equipment, and seawater power generation equipment. Therefore, it can be applied to various types of renewable energy power generation facilities E, and can be widely used and has excellent versatility.

The outline block diagram which shows the system | strain of the electric power feeding system which concerns on suitable embodiment of this invention, Block configuration diagram of the power supply system, A flow chart for explaining the function (operation) of the power feeding system; Operation explanatory diagram of the power storage device provided in the power supply system, Other operation explanatory views of the power storage device, Schematic configuration diagram showing a modification example of the power storage device, Schematic configuration diagram showing another modification of the power storage device,

  Next, preferred embodiments according to the present invention will be given and described in detail with reference to the drawings.

  First, the whole structure of the electric power feeding system M which concerns on this embodiment is demonstrated with reference to FIG.1 and FIG.2.

  Initially, the structure of the electrical storage apparatus 1 used for the electric power feeding system M which concerns on this embodiment is demonstrated. The power storage device 1 is roughly configured to include a float body 2, a float elevating unit 3, a motion transmission unit 12, and an energy conversion unit 4, and the illustrated power storage device 1 is illustrated as being installed along the coast. Hereinafter, the structure of each part is demonstrated concretely.

  As shown in FIG. 1, the float body 2 is configured as a sealed body 21 with a rigid material such as a metal material having a hollow inside. The sealed body 21 is required to float on the water surface Wu (the sea surface in the example), and the inside of the sealed body 21 is filled with air. In this case, an inert gas such as helium gas may be filled instead of air. In addition, since the float body 2 is submerged in water, the sealing body 21 has a structure with increased water pressure resistance so that the volume does not change more than necessary, and material selection is performed so that corrosion and deterioration do not occur as much as possible. . Although FIG. 1 is drawn in principle, the sealing body 21 can be implemented in various forms such as increasing the strength by adding a strong material inside.

  The float raising / lowering means 3 includes a wire member 3w having one end 3ws coupled to the float body 2, and a winding unit 3r installed on the sea side in the ground facility C. The winding portion 3r includes a rotor 3rc that is rotatably supported, and the other end of the wire member 3w is coupled to the rotor 3rc. Therefore, it is desirable to install the ground facility C on the ground Gw facing the sea. In addition, guide portions 3ga and 3gb through the wire member 3w are respectively installed on the sea floor (water bottom) Wd and the ground Gw located in the vicinity of the ground facility C. One guide portion 3ga is provided with a pulley mechanism 11 that supports the wire member 3w by being supported by a block 22 fixed to the water bottom Wd, and the other guide portion 3gb is supported by a support column 23 fixed to the ground Gw. Thus, a pulley mechanism 11 is provided to hang the wire member 3w. If such a pulley mechanism 11... Is used as the guide portions 3ga, 3gb, it can be implemented with a relatively simple structure. Therefore, the operation of sinking the float body 2 and the operation of floating the float body 2 in water are surely and reliably performed. There is an advantage that can be done smoothly.

  Thereby, in the float raising / lowering means 3, if the wire member 3w is pulled in the arrow Fr direction in FIG. 1 by rotating the rotor 3rc of the winding part 3r in the winding direction and winding the wire member 3w, The float body 2 floating on the water surface Wu can be sunk (lowered) to a predetermined depth D. Further, if the rotor 3rc can be rotated in the feeding direction and the wire member 3w is switched so as to be drawn out in the direction of the arrow Fo in FIG. 1, the float body 2 submerged to a predetermined depth D is lifted (raised). be able to.

  A float body position detector 16 is attached to the winding unit 3r. The float body position detector 16 can detect the level of the depth D where the float body 2 is located. In addition, especially the detection result with respect to the depth D of the float body 2 does not require a detection precision, Therefore Various detection methods are applicable. In the example, the rotational speed of the rotor 3rc in the winding unit 3r and the level of the depth D of the float body 2 are proportional to each other. Therefore, the depth D of the float body 2 is calculated by detecting the rotational speed of the rotor 3rc. Is going. In addition, the position (depth D) of the float body 2 can be determined by various detectors, such as fixing a detection element (magnet, etc.) at a plurality of positions of the wire member 3w by embedding and the like and detecting the position by a magnetic detector. It can be detected.

  For the energy conversion means 4, a motor generator 26 having an electric motor 4m for rotating the winding portion 3r in the winding direction Fr and a generator 4g for generating electric power based on the rotation of the winding portion 3r in the feeding direction Ff is used. . The motor generator 26 may be a type configured as one device having the functions of both the motor 4m and the generator 4g, or one independent generator 4g and one independent generator 4g. It is also possible to use a type in which each is switched. In addition, a DC motor that operates with DC power is used as the motor 4g, and an AC generator that outputs AC power is used as the generator 4g.

  The motion transmission means 12 has a function of switching the state of rotation transmission by being interposed between the winding unit 3r and the energy conversion means 4. Specifically, clutch means 25 and transmission means 24 are provided. Therefore, in the illustrated example, the rotation shaft of the motor generator 26 and one of the input side or output side rotation shafts of the clutch means 25 are configured to be able to transmit rotation via the first belt transmission mechanism, and the clutch means 25. The other rotation shaft in FIG. 4 and one rotation shaft on the input side or output side in the transmission means 24 are configured to be able to transmit rotation via the second belt transmission mechanism. Further, the other rotating shaft of the transmission unit 24 and the rotor 3rc of the winding unit 3r described above are configured to be able to transmit rotation via a third belt transmission mechanism. For ease of understanding in the drawings, the belt transmission mechanism is illustrated as the rotation transmission method. However, a gear transmission mechanism may be used, or a transmission mechanism that is directly connected may be used for transmission without shifting. It is.

  In this case, the clutch means 25 has a normal clutch function for switching ON (connection: transmission) or OFF (disconnection: transmission cancellation) and prevents reverse rotation with respect to rotation in one direction at the time of connection. A reverse rotation prevention function is provided, and this reverse rotation prevention function can also be switched ON (function effective) or OFF (function release). Thereby, when the clutch means 25 is switched to ON (connection side), the rotation is transmitted in both directions, and the reverse rotation prevention function can be exhibited for the rotation transmission in one direction, and the clutch means 25 is turned off. When switched to the (separation side), rotation transmission in both directions can be canceled. Further, the transmission means 24 can change different rotation transmission speeds by switching, and can increase or decrease the rotation transmission speed as necessary. As described above, the main part of the power storage device 1 can be configured, and the generated power Pe obtained from the renewable energy power generation facility E described later can be converted into potential energy (buoyancy energy) and stored, and the stored stored power Pr, That is, the accumulated potential energy can be converted into the stored power Pr and extracted.

  Next, the overall configuration of the power feeding system M according to the present embodiment including the configuration excluding the main part of the power storage device 1 described above will be described with reference to FIGS. 1 and 2.

  E is a renewable energy power generation facility, and the illustration shows a solar power generation facility Es. Reference numeral 6 denotes a control system. The control system 6 includes a controller main body 31, an input / output processing unit 32, and a circuit switching unit 34 as shown in FIG. A mode switching means 5 for switching to a storage mode in which power is generated by supplying generated power Pe obtained from the energy power generation facility E or a discharge mode in which the stored power Pr stored in the power storage device 1 is taken out from the energy conversion means 4 and used is included. It is. On the other hand, the float body position detector 16 described above is connected to the input port of the controller body 31 and gives detection data of the depth D of the float body 2 to the controller body 31.

  In this case, the computer main body 31 has a computing function for performing various control processes, arithmetic processes, and the like, includes an internal memory 31m, hardware such as a CPU, and a display that is not shown. In the internal memory 31m, sequence control for performing sequence control of the entire power feeding system M corresponding to the power generation state of the photovoltaic power generation equipment Es and the power storage state of the power storage device 1 (the state of the depth D of the float body 2) and the like. It has a program area 31mp for storing various programs such as programs and a data area 31md for writing various data such as setting data and collection data.

  In the sequence control program, at least in relation to the present invention, when the generated power Pe is greater than or equal to the set power amount, the use mode for supplying the generated power Pe to the power usage area Au and / or the energy conversion means 4 Control processing for switching to a power storage mode in which power Pe is supplied to perform power storage, and when the generated power Pe is less than the set power amount, the power is switched to a discharge mode in which the stored power Pr is extracted from the energy conversion means 4 and supplied to the power usage area Au. Control processing, generated power Pe is less than a preset set power amount, and the depth D (Dd) of the float body 2 detected by the float body depth detector 16 is deeper than a preset set depth Dh1 Sometimes, the control processing for switching to the discharge mode, the generated power Pe is less than the preset power amount, and is detected by the float body depth detector 16. Control processing for switching to the power supply mode for supplying the commercial power Pc supplied from the commercial power supply 15 to the power usage area Au when the depth D (Du) of the float body 2 is shallower than the preset set depth Dh2. , When the generated power Pe is greater than or equal to a preset set power amount and the depth D (Dm) of the float body 2 detected by the float body depth detector 16 is deeper than a preset limit depth Dm A control program for performing control processing for switching to the power sale mode for selling power to the commercial power supply 15 side is included.

  The input / output processing unit 32 has a built-in DC / AC conversion function. The input / output processing unit 32 includes a power transmission output line for transmitting power to a power supply area Au such as a house H. The circuit switching unit 34 for inputting and outputting power on the line and the power supply system M side is connected to each other, and the input / output processing unit 32 and the controller main body 31 are connected by a signal line for exchanging signals such as control signals.

  The circuit switching unit 34 has a function of switching the power line. The circuit switching unit 34 includes the input / output processing unit 32 and the power output of the photovoltaic power generation equipment Es (renewable energy power generation equipment E). The circuit and the motor generator 26 (energy converting means 4) are connected to each other, and the circuit switching unit 34 and the controller main body 31 are connected by a signal line for exchanging signals such as switching signals.

  Next, an example of the operation (usage mode) of the power supply system M according to the present embodiment will be described with reference to the flowchart of FIG. 3 and the operation explanatory diagrams of FIGS.

  Now, it is assumed that the power feeding system M is in an ON state and is operating normally. The controller main body 31 monitors the amount of generated power Pe from the photovoltaic power generation facility Es (step S1). When the power amount is equal to or greater than the preset power amount, it is determined that a sufficient amount of power to be supplied to the power usage area Au is secured (step S2), and the controller main body 31 determines the circuit switching unit 34. Further, by performing switching control on the input / output processing unit 32 and the like, the mode is shifted to the use mode and the storage mode (steps S3 and S4).

  Depending on the use mode, the generated power Pe is applied to the input / output processing unit 32 via the circuit switching unit 34, and the input / output processing unit 32 performs an output process for the generated power Pe, that is, a DC / AC conversion process ( Step S5). In this case, the DC generated power Pe obtained from the solar power generation facility Es is converted into 100 [V] commercial power (AC power). Then, the DC / AC converted power is transmitted to the power usage area Au (step S6).

  In addition, the power storage process by the power storage device 1 is performed in the power storage mode. In this case, the remaining power excluding the power transmitted to the power usage area Au, that is, surplus power in the generated power Pe is supplied to the motor 4m of the motor generator 26 (energy conversion means 4). The clutch means 25 is switched to the ON (connection side) side, and the reverse rotation prevention function of the clutch means 25 is also switched to the ON (function effective) side. On the other hand, the controller main body 31 determines the detection result of the float body position detector 16 and executes the power storage process unless the depth D of the float body 2 reaches the preset limit depth Dm (step S7, S8, S9).

  In the electric storage process, the electric motor 4m is operated, and the rotation of the electric motor 4m is transmitted to the winding unit 3r via the clutch means 25 and the transmission means 24. Thereby, the winding part 3r rotates in the direction which winds up the wire member 3w, and the wire member 3w is pulled in the arrow Fr direction used as the winding direction in FIG. As a result, the float body 2 descends underwater, and potential energy is accumulated. At this time, the reverse rotation preventing function of the clutch means 25 prevents the wire member 3w from returning in the reverse direction.

  Then, if the accumulation process proceeds and the depth D of the float body 2 reaches the limit depth Dm, the power storage capacity of the power storage device 1 reaches the limit. The generated power Pe is shifted to a power sale mode for selling power to the commercial power supply 15 (steps S9 and S10). That is, the controller main body 31 performs switching control for the circuit switching unit 34 and the input / output processing unit 32, applies the generated power Pe to the input / output processing unit 32, and supplies the generated power Pe to the commercial power supply line on the commercial power supply 15 side. In this case, DC / AC conversion processing is performed in the input / output processing unit 32, and the DC generated power Pe is converted into a commercial voltage (AC power) of 100 [V].

  Thus, the generated power Pe is equal to or greater than the preset set power amount, and the depth D (Dm) of the float body 2 detected by the float body depth detector 16 is greater than or equal to the preset limit depth Dm. If a function for switching to a power sale mode for selling power is provided on the commercial power supply 15 side when deep, even if excessive power is generated in the generated power Pe and the amount of stored electricity (energy), the power sale is performed on the commercial power supply 15 side. Therefore, there is an advantage that unnecessary energy loss can be avoided, and energy saving and economic efficiency can be improved.

  Therefore, if the amount of generated power Pe from the solar power generation facility Es is sufficiently large, power transmission to the power usage area Au is performed and power storage to the power storage device 1 is performed. In this case, the generated power Pe from the solar power generation facility Es is basically transmitted to the power usage area Au by a necessary amount, and the remaining power, that is, surplus power (partial power) is supplied to the power storage device 1. It will be charged.

  On the other hand, the controller main body 31 monitors the power amount of the generated power Pe, and when the power amount is insufficient or zero, that is, when the power amount is less than a preset power amount, it is supplied to the power usage area Au. It is determined that the amount of power to be used is insufficient, and the transition to the use mode is not performed (step S2). In this case, the controller main body 31 determines the detection result of the float body position detector 16, and as shown in FIG. 4, the depth D (Dd) of the float body 2 is deeper than the preset set depth Dh1. If it is in the position, it is determined that a sufficient amount of power to be supplied to the power usage area Au is secured, and the circuit is switched to the discharge mode by performing switching control of the circuit switching unit 34 and the input / output processing unit 32, etc. (Steps S11 and S12).

  Thus, the generated power Pe is less than the preset set power amount, and the depth D (Dd) of the float body 2 detected by the float body depth detector 16 is greater than or equal to the preset set depth Dh1. If a function for switching to the discharge mode is provided at a deep time, the necessary stored electric power Pr can be ensured when necessary, so that there is an advantage that a system with high stability and reliability can be constructed.

  In the release mode, the potential energy stored in the power storage device 1 is released. In this case, the reverse rotation prevention function provided in the clutch means 25 is switched to the OFF (function release) side. As a result, the float body 2 is raised by buoyancy, and potential energy (buoyancy energy) is released (step S13). In this case, the wire member 3w is pulled in the direction of the arrow Fo that is the feeding direction in FIG. 1, and the winding portion 3r rotates in the direction of feeding the wire member 3w. The rotation of the winding unit 3r is transmitted to the generator 4g of the motor generator 26 (energy conversion unit 4) via the transmission unit 24 and the clutch unit 25, and power is generated by the rotation of the generator 4g (step S14). ). The stored electric power Pr output from the generator 4g is applied to the input / output processing unit 32 via the circuit switching unit 34, and the input / output processing unit 32 performs an output process for stabilization (step S5). In this case, stabilization processing is performed on the AC stored power Pr obtained from the generator 4g so that the specified commercial voltage is 100 [V]. The stabilized power is transmitted to the power usage area Au (step S6).

  On the other hand, when the controller main body 31 monitors the power amount of the generated power Pe, the power amount is insufficient or zero, and when the detection result of the float body position detector 16 is determined, FIG. As shown, when the depth D (Du) of the float body 2 is in a shallow position where it is less than the preset set depth Dh2, a sufficient amount of electricity stored in the power usage area Au is not secured. Determination is made and the mode is shifted to the power supply mode by performing switching control of the input / output processing unit 32 or the like (step S15). In the power supply mode, the commercial power Pc from the commercial power supply 15 is transmitted to the power usage area Au via the input / output processing unit 32.

  Thus, the generated power Pe is less than the preset set power amount, and the depth D (Du) of the float body 2 detected by the float body depth detector 16 is less than the preset set depth Dh2. When a function for switching the commercial power Pc supplied from the commercial power supply 15 to a power supply mode for supplying power to the power usage area Au is provided when shallow, the combined use with the commercial power supply 15 becomes possible. There is an advantage that it is possible to construct a highly flexible system that can be used with confidence, such as being able to reliably supply power even when the stored power Pr is insufficient with respect to the required amount.

  As described above, the power supply system M according to the present embodiment monitors the amount of generated power Pe from the photovoltaic power generation facility Es (renewable energy power generation facility E), and stores the power storage device according to the state of the amount of power. 1 is used as a power storage function or a power supply function, and a process of using the commercial power supply 15 as an auxiliary is performed. Therefore, as long as the power feeding system M is not turned off, continuous sequence control is performed (step S16).

  The power supply system M of the embodiment is shown as an example, and in particular, it is assumed that the power usage area Au is large to some extent. Therefore, in the case where the power usage area Au is at the level of one house or several houses and the power storage capacity of the power storage device 1 is sufficiently secured, it is possible to eliminate the need for the commercial power supply 15. It is.

  Therefore, according to such a power feeding system M according to the present embodiment, as a basic configuration, the float body 2 floating on the water surface Wu, one end 3ws is coupled to the float body 2, and the guide portions 3ga and 3gb are routed. The float member 2w which has floated on the water surface Wu by winding the wire member 3w by the winding part 3r is submerged to a predetermined depth D, and the float which is submerged to the predetermined depth D by being fed out from the winding part 3r. Energy conversion having a float raising / lowering means 3 for levitating the body 2, an electric motor 4m for rotating the winding portion 3r in the winding direction Fr, and a generator 4g for generating electric power based on the rotation of the winding portion 3r in the feeding direction Ff Means 4 and at least the energy conversion means 4 for supplying the generated power Pe to store electricity, or storing energy Pr from the energy conversion means 4 To become and a mode switching means 5 for switching the discharge mode to enable out, discharging the power storage based on chemical reactions, it can be carried out the accumulation of energy by the energy storage means constituted by simple mechanical member. Therefore, it is difficult to deteriorate and a long life can be achieved by performing maintenance. In addition, since mechanical members can use general metal materials such as steel materials and stainless steel materials, many of them can be reused and resource saving can be achieved. Furthermore, since the energy storage means can be configured by taking advantage of the natural environment such as in the sea or in the lake, the installation space such as private land can be secured with a small area, and it can be configured as a simple mechanical member. Cost reduction. In addition, energy loss associated with power storage can be suppressed, which can contribute to improvement of power storage efficiency.

  In particular, since it is applied to the generated power Pe from the renewable energy power generation facility E, even if the generated power Pe is easily influenced by natural phenomena such as weather, it is possible to eliminate uneven power supply on the time axis. Supply equalization and stabilization can be realized.

  Next, a modified example in which a part of the power storage device 1 used in the power supply system M according to the present embodiment is changed will be described with reference to FIGS. 6 and 7.

  The modification shown in FIG. 6 uses a plurality (three examples) of float bodies 2a, 3b, 2c and a plurality (three examples) of float lifting / lowering means 3a, 3b, 3c coupled to each float body 2a. It was. Accordingly, the transmission means 24 and the clutch means 25 shown in FIG. 1 are also provided with corresponding quantities (three examples), and each clutch means 25... Is provided between each clutch means 25. Selective connection means for connecting to a single motor generator 26 by means of selection or combination is interposed. The modified example shown in FIG. 6 can be used when it is possible to increase the storage capacity even when the depth to the seabed Wd is shallow and to distribute the storage capacity. In FIG. 6, reference numerals 3wa, 3wb, and 3wc denote wire members, reference numerals 11a, 11b, and 11c denote pulley mechanisms, and 22e denotes commonly used blocks.

  7 (a) and 7 (b) is a modification of the overall shape of the float body 2. FIG. 7 (a) shows a case where the longitudinal section is formed in a rhombus, and FIG. A case where the longitudinal section is circular, that is, a case where the whole is formed in a spherical shape is shown. Thus, the overall shape of the float body 2 is not limited to a specific shape or size. Therefore, as other shapes, various shapes such as an ellipse, oval, oval, etc. can be applied to the longitudinal section, and in particular, the shape of the float body 2 is preferably a shape that can reduce the movement resistance during elevation. In FIGS. 7A and 7B, 2d and 2e indicate float bodies, and 21d and 21e indicate sealed bodies, respectively. Moreover, the float body 2 does not necessarily need to provide a sealed space inside, and can be implemented in various forms as long as it floats on the water surface Wu, for example, is formed of a material that floats on the water surface Wu.

  The preferred embodiments including the modified examples have been described in detail above. However, the present invention is not limited to such embodiments, and the detailed configuration, shape, material, quantity, numerical values, and the like of the present invention are not limited thereto. Changes, additions and deletions can be made arbitrarily without departing from the scope.

  For example, although the sea surface Wu is exemplified as the water surface, other lake surfaces (natural lakes, artificial lakes), artificially constructed water storage facilities, and the like are also applicable. Moreover, the solar power generation equipment Es is exemplified as the renewable energy power generation equipment E, but various other renewable energy such as wind power generation equipment, geothermal power generation equipment, hydroelectric power generation equipment, seawater power generation equipment, etc. that use renewable energy. Power generation equipment is applicable. As described above, since the water surface Wu can include at least one or more of the seawater surface (Wu), the lake water surface, and the water storage surface, various types including artificial water storage facilities including the seaside and the vicinity of the lake. Renewable energy power generation equipment E can include at least one or more of solar power generation equipment Es, wind power generation equipment, geothermal power generation equipment, hydroelectric power generation equipment, and seawater power generation equipment. Therefore, it can be applied to various types of renewable energy power generation facilities E and has an advantage that it can be widely used and has excellent versatility.

  On the other hand, although guide part 3ga ... illustrated the case where it fixed to water bottom Wd and ground Gw, the case where it fixes to either water bottom Wd or ground Gw is not excluded. Moreover, although the guide part 3ga ... illustrated the case where the pulley mechanism 11 ... (11a ...) was included, it is not limited to the pulley mechanism 11 ... (11a ...). Furthermore, the control mode of the control system 6 mentioned in the embodiment is an example. In addition, although 100 [V] voltage was illustrated as a voltage, in the case of long-distance transmission etc., the magnitude | size of voltage is arbitrary, such as converting into a corresponding high voltage.

  The power feeding system M according to the present invention can be used for various power feeding systems that temporarily store generated power from a renewable energy power generation facility and use the stored stored power.

  2: float body, 3: float raising / lowering means, 3r: winding part, 3w: wire member, 3ws: one end of wire member, 3ga: guide part, 3gb: guide part, 4: energy conversion means, 4m: electric motor, 4g : Generator, 5: Mode switching means, 6: Control system, 11 ...: Pulley mechanism, 11a ...: Pulley mechanism, 15: Commercial power supply, 16: Float depth detector, E: Renewable energy power generation equipment, Es : Photovoltaic power generation equipment, Pe: generated power, Pr: stored power, Pc: commercial power, Wu: water surface (sea surface), Wd: water bottom (sea floor), D: depth of float body, Dd: depth of float body Du: Depth of float body, Dm: Limit depth (float body depth), Dh1: Set depth, Dh2: Set depth, (Fr): Winding direction, (Ff): Feeding direction, Gw: Ground, M: Power supply system, Au: Power usage Area

Claims (4)

  In a power feeding system for supplying generated power from a renewable energy power generation facility, a float body floating on the water surface, and a wire member having one end coupled to the float body and passing through a guide portion are wound around a winding portion to The float body floating on the surface is submerged to a predetermined depth, and is floated and lifted to float the float body submerged to a predetermined depth and driven to rotate in the winding direction. An energy conversion means having a generator that generates electric power by rotating the winding unit in a feeding direction, and a usage mode in which the generated power is supplied to a power usage area when the generated power is equal to or higher than a set power. A storage mode in which the generated power is supplied to and stored in the energy conversion means, and the generated power is less than a set power and obtained from a float depth detector A discharge mode in which stored power is taken out from the energy conversion means when the depth of the funnel is greater than or equal to a set depth and is supplied to the power usage area, the generated power is less than the set power, and the depth of the float is Power supply mode for supplying commercial power supplied from a commercial power source to the power usage area when the depth is less than the set depth, or when the generated power is equal to or greater than the set power and the float body depth is equal to or greater than the limit depth And a control system switchable to a power selling mode for selling power to the commercial power source.   The power feeding system according to claim 1, wherein the guide unit includes a pulley mechanism that spans the wire member by being fixed to a water bottom.   The power supply system according to claim 1, wherein the water surface includes at least one or more of a seawater surface, a lake surface, and a water storage surface.   The power supply according to claim 1, wherein the renewable energy power generation equipment includes at least one of solar power generation equipment, wind power generation equipment, geothermal power generation equipment, hydroelectric power generation equipment, and seawater power generation equipment. system.

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