JP7275799B2 - power supply system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system for supplying electric power used in various facilities, such as facilities installed in steel towers supporting overhead lines.

Generally, a steel tower supporting an overhead line is provided with various facilities. Specifically, there are aircraft obstacle lights, surveillance cameras, lighting, various sensors, etc., all of which are powered by electricity. Therefore, it is necessary to secure a power supply for supplying electric power used by the various facilities to those various facilities. Conventionally, when installing various equipment that requires power supply to a steel tower, a power supply is secured and power is supplied by the following method.

One method (first method) is a method in which a power supply is wired to a steel tower through a distribution line, and power is supplied to various facilities by the power supply to operate various facilities. If the equipment is a control device with a built-in battery, power can be supplied from the battery even in the event of a short-term power outage.

This method is suitable for the operation of various facilities in places where it is difficult to secure a stable power source all the time. This method installs a dedicated supply line (electric pole/distribution line power supply), so it is not a power generation method, so it is possible to supply stable power without being affected by the power generation situation.

Another method (second method) is to install solar panels on the steel tower, store the electricity generated by the solar panels in storage batteries, and supply power from the storage batteries to various facilities. It is a method of operating equipment.

This method is suitable for the operation of various facilities in mountainous areas where it is difficult to supply power by constructing dedicated supply lines (electric poles or power supply lines).

As a related technology, for example, a new power generation system and power generation method using transmission line equipment, which has a support section that supports the transmission line installed on the transmission tower and a power generation section, and the support section A support line, one end of which is connected to a power transmission line, and a rotating body that rotates in cooperation with the support line. There is a technology related to a power generation system that generates power by

Japanese Patent No. 4668349

However, in the case of the first method, power supply through distribution lines, it is necessary to build a utility pole from the foot of the mountain to the steel tower, so there is a problem that it cannot be built without the consent of the landowner. There is In addition, there is a problem that power supply may be cut off due to the disconnection of distribution lines due to strong winds or fallen trees caused by typhoons. In addition, there is a problem that construction costs such as transportation of materials and installation work are high due to construction in mountainous areas.

In addition, in the case of supplying power by photovoltaic power generation, which is the second method, there is a problem that power cannot be generated in places where sunlight is blocked. In addition, there is a problem that sufficient power cannot be generated when the weather is cloudy or rainy. In addition, trees around the solar panels may grow and cover the panels, in which case there is a problem of reduced power generation efficiency. In addition, power is generated only during the daytime, and no power is generated at night, resulting in poor power generation efficiency.

In addition, the second method requires equipment such as solar panels that are heavy or have a large wind-swept area. be.

Therefore, in order to supply power to various equipment installed on steel towers that support overhead lines, there is a demand for a new power supply system that replaces the power supply method using distribution lines and the power supply method using photovoltaic power generation. there is

SUMMARY OF THE INVENTION It is an object of the present invention to provide a new system that replaces the conventional method of supplying electric power for use in various equipment installed on steel towers that support overhead lines, in order to solve the problems of the conventional technology described above. and

In order to solve the above-described problems and achieve the object, the power supply system according to the present invention includes a vibration power generation device that generates power by vibration of an overhead line, a power storage unit that stores the power generated by the vibration power generation device, and a control unit that controls the storage unit and supplies the stored power to the configuration unit.

Further, in the power supply system according to the present invention, in the above invention, the power supply system includes a communication device that transmits and receives information to and from the outside, and the control unit controls the power storage unit based on the information received by the communication device. is characterized by controlling a component including

Further, in the power supply system according to the present invention, in the above invention, the configuration unit is an imaging device that uses the supplied power to photograph the surroundings of the steel tower and transmits the photographed image or video to the outside. characterized by being

Further, in the power supply system according to the present invention, in the above invention, the component measures the separation distance between the overhead line and the tree using the supplied power, and transmits the measured result to the outside. A device.

Further, in the power supply system according to the present invention, in the above invention, the configuration unit is provided in a steel tower and is lit using the power supplied by the control unit. It is characterized by being a point orientation device.

Further, in the power supply system according to the present invention, in the above invention, the component is a lighting device that uses the supplied power to illuminate the periphery of the steel tower.

Further, in the power supply system according to the present invention, in the above invention, the vibration power generation device generates power by causing a change in magnetization using an inverse magnetostriction effect.

According to the power supply system of the present invention, there is an effect that it is possible to provide a new system that replaces the conventional method of supplying power to be used in various facilities installed on steel towers that support overhead lines.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing explaining the outline|summary of the electric power supply system of embodiment concerning this invention. It is a block diagram showing an example of functional composition of a power supply system of an embodiment concerning this invention. FIG. 2 is an explanatory diagram (part 1) for explaining the principle of vibration of an overhead wire; FIG. 2 is an explanatory diagram (part 2) for explaining the principle of vibration of an overhead wire; FIG. 2 is an explanatory diagram (part 1) for explaining the principle of the vibration power generator; It is explanatory drawing (2) explaining the principle of a vibration electric power generating apparatus. FIG. 3 is an explanatory diagram (part 3) for explaining the principle of the vibration power generator;

Preferred embodiments of a power supply system according to the present invention will be described in detail below with reference to the accompanying drawings.

(Summary of power supply system)
First, an overview of the power supply system of the present embodiment will be described. FIG. 1 is an explanatory diagram illustrating an overview of a power supply system according to an embodiment of the invention. In FIG. 1 , a plurality of overhead wires (electric wires) 103 are provided between steel towers 101 and 102 . Reference numeral 104 is an overhead ground wire.

The height of the steel towers 101 and 102 is increased depending on the voltage, installation location, and the like. If the voltage is 66 kV, the height is about 25 m and the weight is about 5 to 10 tons. If the voltage is 500 kV, the height is about 80 m and the weight is about 70 to 100 tons. There are various heights. In particular, depending on the construction site, etc., the height may exceed 100 m.

The distance between the pylons 101 and 102 varies depending on the environment in which the pylons 101 and 102 are constructed, and the distance may be several hundred meters.

The vibration power generation device in the power supply system of the present embodiment focuses on the vertical motion of the overhead wire generated by the vibration of the breeze, generates power using the vertical motion, and supplies the power to various facilities of the steel tower. be.

(Functional configuration of power supply system)
FIG. 2 is a block diagram showing an example of the functional configuration of the power supply system according to the embodiment of the invention. In FIG. 2, the power flow is indicated by a solid line and the data flow is indicated by a dashed line.

In FIG. 2, the power supply system includes a control unit 200, a vibration power generation device 201, a power storage unit 202, a camera 203, an aircraft obstacle light 204, various sensors 205, a failure point locating device 206, and an LED lighting 207. , and a communication device 208 .

The control unit 200 takes charge of overall control of the power supply system. The control unit 200 can realize its functions by a CPU (not shown) and a memory (not shown) that stores programs such as a boot program and various data and is used as a work area for the CPU. can.

The control unit 200 monitors the amount of power generated by the vibration power generator 201 , thereby grasping the operating status of the vibration power generator 201 . Specifically, when a failure or the like occurs in the vibration power generation device 201, the situation can be grasped from the power generation amount or the like, and necessary countermeasures can be taken. For example, it performs control such as notifying the management center of the tower, switching to an auxiliary battery, and stopping the power supply to unnecessary components.

The control unit 200 monitors the amount of power stored in the power storage unit 202 and thereby can grasp the state of power storage in the power storage unit 202 . Specifically, it is possible to control power supply when the amount of stored electricity becomes an unexpected value in the state of electricity storage. For example, in the same way as when the vibration power generation device 201 fails, control is performed to notify the control center of the tower, switch to an auxiliary battery, and stop power supply to unnecessary components.

Further, the control unit 200 may control the operation of each of the constituent units 203 to 207, including data input/output with respect to each of the constituent units 203 to 207. FIG.

Vibration power generator 201 generates power by vibration of overhead wire 103 (for example, vibration of a breeze). Here, instead of the overhead wire 103, the overhead ground wire 104 may be used. The vibration power generator 201 uses the inverse magnetostriction effect to generate a change in magnetization to generate power. Details of the vibration power generator 201 will be described later with reference to FIGS. 5 to 7. FIG.

The power storage unit 202 stores power generated by the vibration power generation device 201 . Specifically, power storage unit 202 can realize its function by, for example, a storage battery such as a lithium battery or a lead storage battery. Then, the control unit 200 controls the storage unit 202 to supply the stored power to each component (camera 203, aircraft obstacle light 204, various sensors 205, failure point locator 206, LED lighting 207).

Power is also supplied from the power storage unit 202 to the communication device 208 . In addition, power is supplied from power storage unit 202 to control unit 200 itself. In addition, if necessary, power can be supplied from the power storage unit 202 to other devices (not shown) other than the components. Specifically, the other device may be various devices such as power equipment around the steel tower and equipment of the surrounding steel tower. It may also be provided as a power source for equipment used in inspections, construction work, and the like.

The camera 203, which is an example of an imaging device, uses power supplied from the power storage unit 202 by the control unit 200 to photograph the surroundings of the towers 101 and 102, and transmits the photographed image or video to the outside (for example, the tower 101, 102 and the management center that manages various facilities of the steel towers 101 and 102). Transmission of images or videos can occur, for example, via communication device 208 .

Obstacle lights 204 are provided in towers 101 and 102 and are lit using power supplied from power storage unit 202 by control unit 200 . Specifically, the aircraft obstacle light 204 can realize its function by, for example, an LED.

Obstacle lights 204 are red or white lights used to indicate the presence of structures such as skyscrapers, control towers, and steel towers to aircraft flying at night. Lights up or flashes brighter or darker. In Japan, according to the Civil Aeronautics Law, installation of aircraft obstruction lights is obligatory on structures including steel towers that are 60 meters or more above the ground or water surface.

Various sensors 205 include, for example, a measuring device that measures the distance between the overhead wire and the tree. The measuring device uses power supplied from power storage unit 202 by control unit 200 to measure the separation distance between the overhead wire and the tree, and transmits the measurement result to the outside (management center, etc.). Based on the received measurement results, the management center can formulate a tree-cutting plan.

The various sensors 205 may also be sensors that detect the status of the pylons 101 and 102 and the overhead line 103, changes in the environment of the pylons 101 and 102, and the like. More specifically, it may be a sensor such as a thermometer, a hygrometer, a barometer, an anemometer, or the like.

The failure point locating device 206 is provided in the steel tower, and uses power supplied from the power storage unit 202 by the control unit 200 to locate failure points on the transmission line due to lightning strikes, disconnections, and the like. The method of locating the fault point generally involves installing a device at one end of the monitoring transmission line, sending a high-frequency pulse to the fault transmission line, and locating the distance from the time it takes to receive the reflected wave from the fault point. "Pulse radar method", "surge reception method" that installs surge reception sensors at both ends of the monitoring transmission line and determines the distance from the arrival time difference of the failure surge, and the location of the failure point from the voltage and current at the time of transmission line failure There is an "impedance method" that orients the

The LED lighting 207 uses power supplied from the power storage unit 202 by the control unit 200 to illuminate the periphery of the steel tower. The LED lighting 207 can be used particularly for monitoring suspicious objects near the steel towers 101 and 102 at night, and for inspection and construction of the steel towers 101 and 102 and various facilities.

A communication device 208 transmits and receives information to and from the outside. The communication device has a communication interface (not shown). The communication interface is connected to a network such as the Internet and controls wireless information communication between the inside of the computer and external devices. More specifically, it may be communication by wireless LAN, Wi-Fi, mobile communication standards (3G, 4G, 5G), PHS line, and the like. Acquisition of various data and programs is performed via the communication I/F.

Based on the information received by communication device 208 , control unit 200 controls configuration units 203 to 207 including power storage unit 202 . Specifically, for example, the communication device 208 externally receives instruction information regarding conditions including permission/suspension of power supply to each component and an upper limit of the amount of power to be provided, and based on the received instruction information. Then, the control unit 200 may control the power supply to each component.

Further, for example, the communication device 208 externally receives instruction information such as an instruction to transmit a photographed image or video to the camera 203 or a change in photographing angle, and the control unit 200 controls the camera 203 based on the received instruction information. You may make it control the operation|movement of.

(Principle of overhead wire vibration)
Next, the principle of vibration of an overhead wire will be explained. 3 and 4 are explanatory diagrams for explaining the principle of vibration of overhead wires. FIG. 3 is an explanatory diagram showing a Karman vortex, and FIG. 4 is an explanatory diagram showing a breeze vibration.

The overhead wire 103 provided on the steel tower receives natural wind and vibrates in various ways. When a relatively gentle wind (with a wind speed of 5 [m/s] or less) blows in a direction perpendicular to the overhead wire 103, a Karman vortex 301 is generated on the leeward side of the overhead wire 103, as shown in FIG. Karman vortices 301 alternately form vortices on the downwind side when a cylindrical object moves through the air or when air flows around a cylindrical object.

The Karman vortex 301 causes the overhead wire 103 to vibrate steadily in the vertical direction. This vibration is called micro-wind vibration. When the frequency of the vibration and the natural frequency of the overhead wire 103 are equal to each other, the vertical vibration of the overhead wire 103 due to the vortex generated on the spine of the overhead wire 103 is as shown in FIG. The overhead wire 103 resonates and vibrates up and down. The lighter the overhead wire 103 and the longer the span, the more likely this breeze vibration occurs. It also tends to occur in flat areas with no mountains or forests, early in the morning, or at sunset.

If the overhead wire 103 continues to vibrate due to the slight wind vibration, the overhead wire 103 will normally be damaged, and there is a risk of short circuit or disconnection. Therefore, it is necessary to prevent the slight wind vibration. As a countermeasure, it is said to be effective, for example, to install a vibration isolation device such as a damper or an armor rod. The damper serves as a vibration absorber, and the armor rod plays a role of reinforcing the overhead wire. Since the vibration power generator 201 has the function of absorbing the vibration of the overhead wires and reinforcing each wire, it can also serve as a vibration isolator.

(Configuration of vibration power generator 201)
Next, the configuration of the vibration power generator 201 will be described. 5 to 7 are explanatory diagrams explaining the principle of the vibration power generator. 5 and 7 show front views of the vibration power generator 201, and FIG. 6 shows a side view of the vibration power generator 201 as seen from the direction of arrow A in FIG.

As shown in FIG. 5, the vibration power generator 201 includes two plate-like magnetostrictive elements (Galfenol) arranged in parallel. These magnetostrictive elements 501a and 501b have an inverse magnetostrictive effect in which magnetization (lines of magnetic force) change greatly when a force is applied. A coil 502 is wound around these two plate-like magnetostrictive elements 501a and 501b.

Then, as shown in FIG. 6, beams 601 to which yokes of iron or the like are joined are formed at both ends. A permanent magnet 602 is attracted to the side surface of the beam 601 . By doing so, a moderate magnetic force line generated by the permanent magnet 602 passes through the two magnetostrictive elements 501a and 501b.

Here, one of both ends of the two magnetostrictive elements 501 a and 501 b is a fixed portion 503 and the other is a movable portion 504 . As shown in FIG. 7, when an upward force is applied to the movable portion 504 while the fixed portion 503 is fixed, the magnetostrictive elements 501a and 501b are bent. At this time, a compressive force is applied to the upper magnetostrictive element 501a, and the lines of magnetic force are reduced by the inverse magnetostrictive effect. Conversely, a tensile force is applied to the lower magnetostrictive element 501b, increasing the lines of magnetic force.

On the other hand, although not shown, the magnetostrictive elements 501a and 501b are bent even when a downward force is applied to the movable portion 504 while the fixed portion 503 is fixed. At this time, a tensile force is applied to the upper magnetostrictive element 501a, and the lines of magnetic force increase due to the inverse magnetostrictive effect. Conversely, a compressive force is applied to the lower magnetostrictive element 501b, and the lines of magnetic force are reduced.

In this way, when the magnetostrictive elements 501a and 501b on which the beams 601 are formed are vibrated, an upward force and a downward force are alternately generated. changes alternately. At this time, a voltage (electromotive force) is generated in the coil 502 according to the law of electromagnetic induction. That is, the change in magnetic energy can be efficiently extracted as electrical energy by the coil 502 wound between the beams 601 .

As described above, the power supply system according to the embodiment of the present invention includes the vibration power generation device 201 that generates power by vibration of the overhead line, the power storage unit 202 that stores the power generated by the vibration power generation device 201, the storage unit 202 to supply the accumulated electric power to the constituent units 203 to 207, the electric power is generated by utilizing the vibration of the breeze of the overhead line, and the steel tower that supports the overhead line efficiently. It is possible to supply electric power to be used in various facilities provided.

Moreover, the power supply system of the embodiment according to the present invention includes a communication device 208 that transmits and receives information to and from the outside. , the power supply to each of the components 203 to 207 can be controlled by remote control.

Further, in the power supply system according to the embodiment of the present invention, the camera 203, which is an example of an imaging device, uses the supplied power to photograph the surroundings of the steel tower, and transmits the photographed image or video to the outside. Therefore, it is possible to more reliably secure the power supply for monitoring the area around the steel tower.

Further, in the power supply system according to the embodiment of the present invention, various sensors 205 (measuring device) use the supplied power to measure the separation distance between the overhead wire and the tree, and output the measured result to the outside. Since the information is transmitted, it is possible to more reliably secure the power supply for performing various measurements and various detections.

Further, in the power supply system according to the embodiment of the present invention, the aircraft obstacle lights 204 are provided on the steel towers 101 and 102, and are lit using the power supplied by the control unit 200. Therefore, the aircraft obstacle lights 204 are The power source for continuous lighting can be secured more reliably.

In addition, in the power supply system according to the embodiment of the present invention, the failure point locating device 206 locates the failure point. It is possible to more reliably secure the actual power supply.

Further, in the power supply system according to the embodiment of the present invention, the LED lighting 207 uses the supplied power to illuminate the surroundings of the steel towers 101 and 102, so the power supply for lighting is more reliably secured. be able to.

Further, in the power supply system according to the embodiment of the present invention, the vibration power generator 201 uses the inverse magnetostriction effect to change the magnetization to generate power. can be converted.

INDUSTRIAL APPLICABILITY As described above, the power supply system according to the present invention is useful as a power supply system that supplies power to be used in various facilities installed on steel towers that support overhead lines. suitable for the system.

101, 102 Steel tower 103 Overhead line (electric wire)
104 Overhead Ground Wire 200 Control Unit 201 Vibration Power Generator 202 Power Storage Unit 203 Camera 204 Aircraft Obstacle Light 205 Various Sensors 206 Fault Locating Device 207 LED Lighting 208 Communication Device 501a, 501b Magnetostrictive Element 502 Coil 503 Fixed Part 504 Movable Part 601 Beam 602 permanent magnet

Claims (7)

a vibration power generator that generates power by vibration of an overhead wire;
a power storage unit that stores power generated by the vibration power generator;
a control unit that supplies power stored in the storage unit to a configuration unit;
with
The power supply system, wherein the control unit monitors the amount of electricity stored in the electricity storage unit, and controls power supply to the configuration unit when the amount of electricity storage becomes an unexpected value. Equipped with a communication device that transmits and receives information to and from the outside,
2. The power supply system according to claim 1, wherein the control unit controls components including the power storage unit based on information received by the communication device. 3. The power supply according to claim 1 or 2, wherein the component is an imaging device that uses the supplied power to photograph the surroundings of the steel tower and transmits the photographed image or video to the outside. system. 3. The apparatus according to claim 1, wherein the component is a measuring device that measures the distance between the overhead wire and the tree using the supplied electric power and transmits the measured result to the outside. power supply system. 3. The apparatus according to claim 1, wherein the component is provided in a steel tower and is an aircraft obstacle light that lights up using power supplied by the control unit or a failure point locating device that locates a failure point. A power supply system as described. 3. The power supply system according to claim 1, wherein the component is a lighting device that uses the supplied power to illuminate the periphery of the steel tower. 7. The power supply system according to any one of claims 1 to 6, wherein the vibration power generator uses an inverse magnetostrictive effect to generate a change in magnetization to generate power.

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