Power transmission facility monitoring system, transmission device, base station, and power transmission facility monitoring method

Abstract

To provide a power transmission equipment monitoring system, a transmission device, a base station, and a power transmission equipment monitoring method capable of stably securing electric power in the power transmission equipment monitoring system.SOLUTION: A power transmission equipment monitoring system 10 includes a transmission device 30 configured to obtain power by electromagnetic induction from the magnetic field generated around a power line 100 and transmit the power in a contactless manner, and a base station 50 that acquires equipment information about power transmission equipment having a power line from power transmitted contactlessly from the transmission device.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a power transmission facility monitoring system, a transmission device, a base station, and a power transmission facility monitoring method. [Background technology]

[0002] 2. Description of the Related Art In a power transmission facility monitoring device (power transmission facility monitoring system) that monitors a power transmission facility, a solar cell has been used to charge a battery (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2013 / 168248 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present disclosure is to provide a technique for ensuring stable power supply in a power transmission facility monitoring system. [Means for solving the problem]

[0005] According to one aspect of the present disclosure, A transmission device configured to obtain electric power by electromagnetic induction from a magnetic field generated around a power line and to transmit the electric power in a non-contact manner; a base station that acquires facility information related to a power transmission facility having the power line by using the power transmitted contactlessly from the transmission device; Equipped An electrical power transmission equipment monitoring system is provided.

[0006] According to another aspect of the present disclosure, The above-mentioned power transmission equipment monitoring system is used A transmission device is provided.

[0007] According to yet another aspect of the present disclosure, The above-mentioned power transmission equipment monitoring system is used A base station is provided.

[0008] According to yet another aspect of the present disclosure, harvesting power from a magnetic field generated around the power line by electromagnetic induction using a transmission device; transmitting the power from the transmission device to a base station in a non-contact manner; acquiring, at the base station, facility information regarding a power transmission facility having the power line by using the power transmitted contactlessly from the transmission device; Equipped A method for monitoring an electrical power transmission facility is provided. Effect of the Invention

[0009] According to the present disclosure, it is possible to secure stable power in a power transmission facility monitoring system. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic perspective view showing a power transmission facility monitoring system according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a schematic block diagram showing a transmission device. [Diagram 3] FIG. 3 is a schematic block diagram showing a base station. [Figure 4] FIG. 4 is a flowchart illustrating a power transmission facility monitoring method according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] [Description of the embodiments of the present disclosure] <Knowledge gained by the inventors> First, the findings of the inventors will be described.

[0012] Conventionally, in a power transmission facility monitoring system that monitors power transmission facilities, the following problems (i) and (ii) may occur.

[0013] (i) Securing electricity In conventional power transmission facility monitoring systems, solar cells have sometimes been used to charge batteries, as in the above-mentioned Patent Document 1. For example, on a sunny day, sunlight is used to generate electromotive force in the solar cells, which then charges the batteries.

[0014] However, for example, during a period of bad weather, sunlight does not appear, making it difficult for the solar cells to generate electromotive force. As a result, the batteries in the power transmission equipment monitoring system cannot be fully charged, and it is not possible to supply sufficient power to the various sensors to obtain equipment information.

[0015] Because power transmission equipment is more likely to experience abnormalities on bad weather days, if equipment information cannot be obtained under such conditions, there is a risk that the power transmission equipment monitoring system will be unable to achieve its original purpose.

[0016] Therefore, there has been a demand for a power transmission facility monitoring system that can stably acquire facility information regardless of weather.

[0017] (ii) Communications In a power transmission facility monitoring system, it is necessary to collect facility information from sensors.

[0018] Conventionally, as in the above-mentioned Patent Document 1, for example, facility information has been acquired from a monitoring device by wireless communication using an information acquisition device.

[0019] That is, in Patent Document 1, a monitoring device installed on a steel tower acquires equipment information and records it in a recording unit. When collecting equipment information, a maintenance worker carrying an information acquisition device approaches the monitoring device to a distance where communication is possible. After approaching, the maintenance worker uses the information acquisition device to wirelessly transmit a transmission request to the monitoring device. The monitoring device then wirelessly receives the equipment information from the information acquisition device. In this manner, equipment information is collected.

[0020] Alternatively, in the past, for example, in a power transmission facility monitoring system, facility information was transmitted by wireless communication via a series of slave devices arranged on each steel tower. This type of wireless communication is called multi-hop wireless communication (or bucket brigade wireless communication).

[0021] In this way, conventionally, facility information has been collected by short-range wireless communication.

[0022] However, the method of Patent Document 1 requires maintenance personnel to collect information, which requires a great deal of time and effort to operate the power transmission facility monitoring system.

[0023] In addition, in the above-mentioned short-distance multi-hop wireless communication method, there is a possibility that radio interference may occur if there are obstacles such as mountains or buildings in the communication path. In this case, it is necessary to add child devices to bypass the obstacles. This increases the cost of the power transmission facility monitoring system.

[0024] Therefore, there has been a demand for a power transmission facility monitoring system that can stably transmit facility information over long distances.

[0025] The present disclosure is based on the above findings of the inventors.

[0026] <Embodiments of the present disclosure> Next, embodiments of the present disclosure will be listed and described.

[0027] [1] A power transmission facility monitoring system according to an embodiment of the present disclosure includes: A transmission device configured to obtain electric power by electromagnetic induction from a magnetic field generated around a power line and to transmit the electric power in a non-contact manner; a base station that acquires facility information related to a power transmission facility having the power line by using the power transmitted contactlessly from the transmission device; Equipped with. According to this configuration, it is possible to stably secure electric power in the power transmission facility monitoring system.

[0028] [2] In the power transmission equipment monitoring system according to [1] above, The base station transmits the facility information to the transmission device, The transmission device transmits the facility information received from the base station to an external device via power line carrier communication using the power line as a communication line. With this configuration, facility information can be transmitted stably over long distances.

[0029] [3] A transmission device according to another aspect of the present disclosure includes: It is used in the power transmission equipment monitoring system described in [1] or [2] above. According to this configuration, it is possible to stably secure electric power in the power transmission facility monitoring system.

[0030] [4] A base station according to still another aspect of the present disclosure, It is used in the power transmission equipment monitoring system described in [1] or [2] above. According to this configuration, it is possible to stably secure electric power in the power transmission facility monitoring system.

[0031] [5] A power transmission facility monitoring method according to still another aspect of the present disclosure includes: harvesting power from a magnetic field generated around the power line by electromagnetic induction using a transmission device; transmitting the power from the transmission device to a base station in a non-contact manner; acquiring, at the base station, facility information regarding a power transmission facility having the power line by using the power transmitted contactlessly from the transmission device; Equipped with. According to this configuration, it is possible to stably secure electric power in the power transmission facility monitoring system.

[0032] [Details of the embodiment of the present disclosure] Next, embodiments of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0033] <One embodiment of the present disclosure> (1) Power transmission equipment monitoring system A power transmission facility monitoring system 10 according to an embodiment of the present disclosure will be described with reference to Figs. 1 to 3. Fig. 1 is a schematic perspective view showing the power transmission facility monitoring system according to the present embodiment. Fig. 2 is a schematic block diagram showing a transmission device. Fig. 3 is a schematic block diagram showing a base station. Note that Fig. 1 shows a part of the power transmission facility, and for simplification, some parts such as a power line 100 are omitted.

[0034] As shown in FIG. 1, a power transmission facility monitoring system 10 of this embodiment includes, for example, a transmission device (PLC converter) 30, a base station 50, and a management center (monitoring center) 70.

[0035] [Power transmission equipment] As shown in FIG. 1, a power transmission facility to which a power transmission facility monitoring system 10 of this embodiment is applied includes, for example, a plurality of steel towers 900 and a plurality of power lines 100.

[0036] The multiple steel towers 900 are installed, for example, at predetermined intervals. Each steel tower 900 supports a power line 100.

[0037] The multiple power lines 100 are strung between multiple steel towers 900, for example. For example, four power lines 100 are provided per phase. The power lines 100 are configured as, for example, so-called overhead transmission lines. Specifically, the power lines 100 are, for example, aluminum-stranded steel core wires (ACSR).

[0038] [Transmission equipment] As shown in Figures 1 and 2, the transmission device 30 of this embodiment is configured, for example, to be attached to a power line 100 and to perform contactless transmission of power to a base station 50 and transmission (relay) of equipment information from the base station 50 to a management center 70.

[0039] Specifically, the transmission device 30 has, for example, a current transformer section (hereinafter also referred to as a “CT section”) 322, a power supply section (power conversion section, power adjustment section) 324, a power supply section 340, a receiving section 360, and a transmitting section 380.

[0040] (CT department) As shown in FIG. 2, the CT unit 322 is configured to generate electric power by electromagnetic induction from a magnetic field generated around the power line 100 based on a current flowing through the power line 100, for example.

[0041] Specifically, the CT section 322 of this embodiment has, for example, a core 322a and a coil 322b. The core 322a is arranged, for example, in an annular shape (circular arc shape, elliptical arc shape) so as to surround the outer periphery of the power line 100. The core 322a includes a magnetic material such as ferrite. The coil 322b is wound around at least a part of the core 322a. With this configuration, an induced current can be generated in the coil 322b by electromagnetic induction based on a change in magnetic flux generated in the core 322a around the power line 100 by a current flowing through the power line 100.

[0042] (Power supply part) 2, the power supply unit 324 is connected to, for example, the CT unit 322, the power supply unit 340, the receiving unit 360, and the transmitting unit 380. The power supply unit 324 is configured to convert, for example, the power generated in the CT unit 322 into power suitable for each unit other than the CT unit 322 and supply the power. Specifically, the power supply unit 324 is configured to convert, for example, the AC power generated in the CT unit 322 into DC power suitable for each unit. In addition, the power supply unit 324 is configured to transform, for example, the voltage generated in the CT unit 322 into a voltage suitable for each unit.

[0043] (Power supply unit) The power supply unit 340 is connected to the power supply unit 324, for example, and is configured to transmit power to the base station 50 in a wireless manner.

[0044] The method of non-contact power supply (wireless power supply) is not particularly limited, but examples thereof include a coupling type and a spatial transmission type. Examples of the coupling type include a magnetic field coupling and an electric field coupling. On the other hand, examples of the spatial transmission type include a microwave transmission and a laser transmission.

[0045] In this embodiment, since the transmission device 30 attached to the power line 100 is located away from the base station 50, a spatial transmission type contactless power supply suitable for relatively long distance transmission is preferable.

[0046] In this embodiment, the power supply unit 340 is of a spatial transmission type, and is configured to transmit power by microwaves from a transmission antenna 342, for example.

[0047] The higher the frequency band of the microwaves transmitted from the power supply unit 340, the higher the transmission efficiency can be, and therefore it is preferable. However, it is preferable that the frequency band of the microwaves from the power supply unit 340 does not overlap with the frequency band of wireless communication from the base station 50 described below, and it is more preferable that they are separated from each other. Specifically, the frequency band of the contactless power supply from the power supply unit 340 is the GHz band, and the frequency band of the data wireless communication from the base station 50 is the MHz band. This makes it possible to suppress interference between the power transmission from the power supply unit 340 to the base station 50 and the information transmission from the base station 50 to the transmission device 30.

[0048] (Receiving section) The receiving unit 360 is configured to receive, for example, the facility information from the base station 50 via an antenna 362. Note that the receiving unit 360 may have, for example, a memory (not shown) that temporarily stores the facility information.

[0049] (Transmitter) The transmitting unit 380 is configured to be connected to the receiving unit 360, for example, and to acquire the facility information from the receiving unit 360. The transmitting unit 380 is also configured to transmit the facility information to the outside, for example, by power line communication (PLC) using the power line 100 as a communication line.

[0050] The PLC coupling method by the transmission unit 380 is not particularly limited, but may be a single line-to-ground coupling method, a line-to-line coupling method, etc. In the transmission unit 380 of this embodiment, either the single line-to-ground coupling method or the line-to-line coupling method can be adopted.

[0051] For example, in the case of a single-wire to ground coupling system, the transmitter 380 can be connected to the ground via a coupling capacitor in a substation or power station.

[0052] However, in consideration of leakage electric fields, it is preferable that the transmitting section 380 in this embodiment is configured, for example, by a line-to-line coupling method.

[0053] As a specific configuration, as shown in FIG. 2, the transmission unit 380 has, for example, a signal generation unit 382 and a circuit unit 384.

[0054] The signal generating unit 382 is configured to, for example, modulate the facility information to generate a facility information signal (hereinafter, also simply referred to as a "signal"). The signal generating unit 382 may include a coupling filter or the like.

[0055] The circuit unit 384 is configured, for example, to superimpose a high-frequency signal from the signal generating unit 382 on (the power wave of) the power line 100. Specifically, the circuit unit 384 has, for example, a blocking coil 384a and a coupling capacitor 384b. The blocking coil 384a is, for example, inserted in series with the power line 100 and configured to suppress loss of the carrier wave of the equipment information signal to the outside (for example, the power plant or substation side). The coupling capacitor 384b connects, for example, the power line 100 and the signal generating unit 382. With such a configuration, it is possible to superimpose a signal on the power line 100.

[0056] It should be noted that the circuit section 384 shown in FIG. 2 is merely a simplified example, and the circuit configuration does not necessarily have to be the same.

[0057] [Base station] 1 and 3, the base station 50 is disposed at a position away from the transmission device 30. Specifically, the base station 50 is provided, for example, near the lower end of a steel tower 900 supporting the power line 100, and is away from the transmission device 30 by a distance equivalent to the height of the steel tower 900. In addition, the base station 50 is firmly fixed to the steel tower 900.

[0058] In this embodiment, the base station 50 is configured to acquire facility information related to the power transmission facility, for example, by power transmitted contactlessly from the transmission device 30. Therefore, the base station 50 is not connected to the transmission device 30 by wire.

[0059] Specifically, the base station 50 includes, for example, a power receiving unit 512, a rectifying unit 514, a battery 516, a regulator 518, an information acquiring unit 520, a transmitting unit 530, and a control unit 540.

[0060] (Power receiving section) The power receiving unit 512 is configured to, for example, obtain (receive) the power transmitted from the transmission device 30 in a non-contact manner.

[0061] In this embodiment, as described above, power feeding unit 340 is configured to transmit microwaves, and therefore power receiving unit 512 is configured to receive microwaves via receiving antenna 512a, for example, and obtain power.

[0062] (rectifier) The rectification unit 514 is configured to be connected to the power receiving unit 512, for example, and to convert the microwave (i.e., high frequency) power obtained by the power receiving unit 512 into direct current. Specifically, the rectification unit 514 has, for example, a diode having rectification properties, a filter for shaping a waveform, and the like.

[0063] The above-mentioned power receiving section 512 and rectifying section 514 may be considered to configure a so-called "Rectenna" used in microwave transmission.

[0064] (battery) Battery 516 is connected to, for example, rectifier 514, and configured to store power obtained from power receiving unit 512 via rectifier 514. Battery 516 is also connected to, for example, control unit 540 and regulator 518, and configured to supply power to control unit 540 and regulator 518.

[0065] Specific batteries 516 include, for example, lead acid batteries or lithium ion batteries.

[0066] (Regulator) Regulator 518 is connected to, for example, battery 516, information acquisition unit 520, transmission unit 530, and control unit 540, and is configured to adjust the power supplied from battery 516 to each unit.

[0067] (Information acquisition department) The information acquisition unit 520 is configured to acquire facility information (monitoring data) related to the power transmission facility, for example, by using the power supplied from the power receiving unit 512 via the regulator 518.

[0068] Specific examples of the information acquisition unit 520 include a camera 522 and a sensor 524.

[0069] The camera 522 is configured to acquire, for example, an image around the power transmission facility as the facility information. The image around the power transmission facility acquired by the camera 522 may be, for example, a still image or a video. The camera 522 may be configured as, for example, an AI camera (Artificial Intelligence Camera) and may be configured to compare a current image with a normal image as a reference and capture an image of a current abnormality.

[0070] Examples of the sensor 524 include a positioning sensor, a vibration sensor, and an environmental sensor.

[0071] The positioning sensor is attached to, for example, a steel tower 900 or the like, and is configured to detect changes in the position of the steel tower 900 or the like using a Global Positioning System (GPS).

[0072] The vibration sensor is attached to, for example, a steel tower 900 or a power line 100, and is configured to detect vibrations of the steel tower 900 or the like.

[0073] Examples of environmental sensors include a temperature sensor that measures the temperature near the power transmission facility, a wind direction and speed sensor that measures the wind direction and speed near the power transmission facility, a corrosion sensor, and a lightning sensor.

[0074] (Transmitter) The transmitting unit 530 is configured to, for example, wirelessly transmit the facility information from the information acquiring unit 520 to the transmission device 30 via an antenna 532 .

[0075] The communication method from the transmitting unit 530 is not particularly limited, but may be, for example, a specific low-power radio.

[0076] (Control unit) The control unit 540 is configured to control, for example, the power receiving unit 512, the regulator 518, the information acquiring unit 520, and the transmitting unit 530.

[0077] Specifically, the control unit 540 is configured as, for example, a computer and has, for example, a CPU (Central Processing Unit) 542, a RAM (Random Access Memory) 544, a storage device 546, and an I / O port 548. The RAM 544, the storage device 546, and the I / O port 548 are configured to be able to exchange data with the CPU 542. The I / O port 548 is connected to, for example, the power receiving unit 512, the regulator 518, the information acquiring unit 520, and the transmitting unit 530.

[0078] The storage device 546 is configured to store, for example, a power transmission facility monitoring program, various facility information obtained from the information acquisition unit 520, and the like. The storage device 546 is, for example, a hard disk drive (HDD) or a solid state drive (SSD).

[0079] The RAM 544 is configured to temporarily store programs, information, etc. that are read from the storage device 546 by the CPU 542 .

[0080] The CPU 542 is configured to execute a predetermined program stored in the storage device 546, thereby functioning as, for example, a power control unit 542a, an information aggregation unit 542b, and a transmission control unit 542c.

[0081] The power control unit 542a, for example, obtains power from the transmission device 30 and controls the power receiving unit 512 and the regulator 518 so as to supply appropriate power to each unit.

[0082] The information aggregating unit 542b is configured to aggregate facility information from the information acquiring unit 520, for example.

[0083] The transmission control unit 542c controls the transmission unit 530 to transmit the aggregated facility information to the transmission device 30, for example.

[0084] A predetermined program for implementing each unit of the control unit 540 described above is used, for example, by installing it in a computer constituted by the control unit 540. The program may be provided, for example, by being stored in a computer-readable storage medium prior to installation. Alternatively, the program may be provided to the computer, for example, via a receiving unit not shown.

[0085] The method of monitoring the power transmission facility by each unit functioning under the control of the control unit 540 will be described in detail later.

[0086] [Number of transmission equipment and base stations installed] In this embodiment, for example, a plurality of sets of the transmission device 30 and the base station 50 are provided at different locations. This makes it possible to acquire facility information over a long-distance power transmission line and transmit the facility information by PLC.

[0087] [Management Center] 1, the management center 70 is provided, for example, at a location away from the transmission device 30. The management center 70 is configured, for example, to acquire facility information from the base station 50 via the transmission device 30 and monitor the power transmission facility based on the facility information. The management center 70 has, for example, at least a receiving unit 780.

[0088] The receiving unit 780 of the management center 70 is configured to receive the facility information from the transmission device 30, for example, by PLC using the power line 100 as a communication line. The receiving unit 780 is also configured to acquire the facility information by demodulating the facility information signal from the transmission device 30, for example.

[0089] The configuration of the receiving unit 780 of the management center 70 is not particularly limited, but may be, for example, a configuration similar to that of the transmitting unit 380 of the transmission device 30 (a configuration symmetrical to the transmitting unit 380 across the center between them).

[0090] Furthermore, in the management center 70, transmission and reception between the receiving unit 780 and the main unit may be wired or wireless.

[0091] (2) Power transmission equipment monitoring method Next, the power transmission facility monitoring method of this embodiment will be described with reference to Fig. 4. Fig. 4 is a flowchart showing the power transmission facility monitoring method according to this embodiment. Note that the power transmission facility monitoring method may be considered as a power information transmission method.

[0092] The power transmission facility monitoring method of this embodiment includes, for example, a preparation step S100, a power acquisition step S220, a non-contact power supply step S240, an information acquisition step S320, an information relay step S340, a PLC step S420, and an end determination step S440. Hereinafter, the operation of each part of the base station 50 is controlled by the control unit 540.

[0093] (S100: Preparation process) First, the power transmission facility monitoring system 10 is prepared.

[0094] Specifically, for example, during a period when power transmission in the power transmission facility is stopped, the transmission device 30 is attached to the power line 100, and the transmission device 30 is prepared in a state in which power supply and information transmission are possible. Also, the base station 50 is prepared in a state in which power reception, information acquisition, and information transmission are possible. Also, the management center 70 is prepared in a state in which information reception is possible.

[0095] (S220: Power acquisition process) Once preparations for the power transmission facility monitoring system 10 are complete, the CT unit 322 of the transmission device 30 is used to obtain power by electromagnetic induction from the magnetic field generated around the power line 100 during power transmission.

[0096] (S240: Non-contact power supply process) After the CT unit 322 acquires the power, the power is transmitted from the power supply unit 340 of the transmission device 30 to the power receiving unit 512 of the base station 50 in a non-contact manner, for example, by microwaves.

[0097] In the base station 50, when the power receiving unit 512 obtains electric power, the power obtained by the power receiving unit 512 is converted to direct current by the rectification unit 514. After the power is converted, the battery 516 is charged.

[0098] The above-mentioned power acquisition step S220 and the non-contact power feeding step S240 are performed continuously until they are completed as described below.

[0099] (S320: Information acquisition process) In the base station 50, when the battery 516 is fully charged or when charging of the battery 516 is continuing, each information acquisition unit 520 acquires equipment information related to the power transmission equipment using power supplied from the power receiving unit 512 via the regulator 518.

[0100] After the facility information is acquired by each information acquisition unit 520, the facility information from the information acquisition units 520 is aggregated in the control unit 540, and the aggregated facility information is recorded in the storage device 546.

[0101] (S340: Information relay process) After the facility information is collected, it is wirelessly transmitted from the transmitter 530 of the base station 50 to the transmission device 30. After the facility information is transmitted from the transmitter 530, the receiver 360 of the transmission device 30 receives the facility information from the base station 50.

[0102] (S420:PLC process) When the transmission device 30 receives the facility information, the transmission unit 380 of the transmission device 30 transmits the facility information by PLC using the power line 100 as a communication line.

[0103] After transmitting the facility information from the transmission device 30, the receiving unit 780 of the management center 70 receives the facility information by PLC. As a result, the facility information obtained from the base station 50 via the transmission device 30 is aggregated in the management center 70.

[0104] The management center 70 monitors the power transmission facility based on the collected facility information. For example, based on the facility information, it is confirmed whether there is any abnormality in the power transmission facility or in its surroundings.

[0105] (S440: End judgment process) When the PLC step S420 is completed, it is determined whether or not to end monitoring by the power transmission equipment monitoring system 10.

[0106] When the monitoring by the power transmission equipment monitoring system 10 is not to be ended (No in S440), the information acquisition step S320 and subsequent steps are repeated while the contactless power supply from the transmission device 30 is continued.

[0107] On the other hand, if monitoring by the power transmission equipment monitoring system 10 is to be terminated (Yes in S440), power supply and information transmission by the transmission device 30, information acquisition and information transmission by the base station 50, and monitoring by the management center 70 are terminated.

[0108] This completes the power transmission facility monitoring process of this embodiment.

[0109] (3) Effects of this embodiment According to this embodiment, one or more of the following advantages are achieved.

[0110] (a) In this embodiment, the transmission device 30 is configured to obtain power by electromagnetic induction from a magnetic field generated around the power line 100 during power transmission, and to transmit the power in a non-contact manner. The base station 50 is configured to obtain facility information related to the power transmission facility by using the power transmitted in a non-contact manner from the transmission device 30.

[0111] By obtaining power from the magnetic field generated around the power line 100 during power transmission in the transmission device 30 by electromagnetic induction, it is possible to obtain power continuously and stably regardless of the weather around the power transmission facility.

[0112] Supplying power from the transmission device 30 to the base station 50 in a contactless manner makes it possible to avoid contact between the power line 100 transmitting power at an ultra-high voltage and the base station 50, and to suppress ground faults (fault currents) caused by power transmission from the transmission device 30 to the base station 50. This makes it possible to transmit power from the transmission device 30 to the base station 50 safely and stably.

[0113] As described above, in this embodiment, it is possible to stably secure the necessary power in the power transmission equipment monitoring system 10. As a result, it is possible to acquire equipment information regardless of the weather and stably monitor the power transmission equipment.

[0114] (b) In this embodiment, by using the above-described transmission device 30, the efficiency of power supply to the base station 50 can be improved.

[0115] Here, in the method using solar cells as in the above-mentioned Patent Document 1, the energy conversion efficiency of solar cells is at most about 20%, and therefore the efficiency of power supply is poor.

[0116] In contrast, the power supply efficiency using the transmission device 30 of this embodiment can be estimated simply as follows, for example. That is, the CT unit 322 of the transmission device 30 can obtain power with a conversion efficiency of 80% or more with respect to the power of the power line 100. In addition, in the case of microwave power supply by the power supply unit 340, the transmission efficiency depends on the frequency, distance, antenna size, etc., but power can be transmitted contactlessly with a transmission efficiency of several tens of percent at the lowest estimate. Therefore, the power supply efficiency when power is supplied (transmitted) from the power line 100 to the base station 50 via the transmission device 30 can be ensured to be several percent or more at the lowest estimate.

[0117] Since the power transmitted through power line 100 is on the order of more than megawatts, when the power of power line 100 is multiplied by the above-mentioned power transmission efficiency, the power supplied from power line 100 to base station 50 via transmission device 30 becomes several hundred watts or more.

[0118] Since the power used by the base station 50 is at most about 100 W, the transmission device 30 of this embodiment can easily and continuously supply the power required by the base station 50. That is, according to this embodiment, it is possible to improve the efficiency of power supply to the base station 50.

[0119] (c) In this embodiment, the transmission device 30 is configured to transmit the facility information received from the base station 50 to the outside by PLC using the power line 100 as a communication line. This allows the facility information to be transmitted reliably as long as the power line 100 is connected in the power transmission line. In other words, even if there are obstacles such as mountains or buildings between the base station 50 and the management center 70, the occurrence of communication failure such as radio interference can be suppressed. As a result, it becomes possible to stably transmit the facility information over a long distance.

[0120] By transmitting facility information over long distances as described above, it is possible to eliminate the need for maintenance personnel to collect information. This reduces the labor required to operate the power transmission facility monitoring system 10. In other words, it is possible to operate the power transmission facility monitoring system 10 efficiently.

[0121] (d) In this embodiment, the transmission device 30 is configured to be able to consistently perform power acquisition, power transmission, information reception, and PLC transmission without being directly connected (without contact) to any other components other than the power line 100. In other words, the transmission device 30 can operate in a stand-alone manner and can self-sufficiently cover its own power consumption.

[0122] As described above, by configuring the transmission device 30 to be able to operate in a stand-alone manner, it is possible to eliminate the need for a battery in the transmission device 30. This makes it possible to reduce maintenance such as battery replacement. In addition, the transmission device 30 can be used continuously for a long period of time. From this perspective as well, it becomes possible to operate the power transmission facility monitoring system 10 efficiently.

[0123] (e) In this embodiment, the transmission device 30 only transmits power and transmits information, and does not perform environmental measurements as facility information. Meanwhile, the base station 50 acquires facility information through the information acquisition unit 520. In this way, by separating the functions between the transmission device 30 and the base station 50, it is possible to easily increase the number of information acquisition units 520 in the base station 50 that is firmly fixed to the tower 900 or the like. This makes it possible to improve the transmission efficiency of facility information and acquire a variety of facility information at the same time.

[0124] <Other embodiments of the present disclosure> Although the embodiments of the present disclosure have been specifically described above, the present disclosure is not limited to the above-described embodiments and can be modified in various ways without departing from the spirit and scope of the present disclosure.

[0125] In the above embodiment, the case where the power supply unit 340 of the transmission device 30 transmits power by microwave as a spatial transmission type has been described, but the present invention is not limited to this case. The power supply unit 340 may be configured to transmit power by laser light as a spatial transmission type. In this case, the power receiving unit 512 of the base station 50 is configured as, for example, a light receiving element (photodiode, solar cell) that receives laser light and converts it into power. In this case, if the power receiving unit 512 outputs DC power, the rectifier unit 514 may be omitted.

[0126] <Preferred aspects of the present disclosure> Preferred aspects of the present disclosure are described below.

[0127] (Appendix 1) A transmission device configured to obtain electric power by electromagnetic induction from a magnetic field generated around a power line and to transmit the electric power in a non-contact manner; a base station that acquires facility information related to a power transmission facility having the power line by using the power transmitted contactlessly from the transmission device; Equipped Power transmission equipment monitoring system.

[0128] (Appendix 2) The base station transmits the facility information to the transmission device, The transmission device transmits the facility information received from the base station to an external device via power line carrier communication using the power line as a communication line. 2. A power transmission equipment monitoring system as described in appended claim 1.

[0129] (Appendix 3) Used in the power transmission equipment monitoring system described in Appendix 1 or Appendix 2 Transmission equipment.

[0130] (Appendix 4) a current transformer unit that obtains power by electromagnetic induction from a magnetic field generated around the power line; a power supply unit that transmits the power in a wireless manner to a base station that acquires facility information related to a power transmission facility having the power line; have Transmission equipment.

[0131] (Appendix 5) A receiving unit that receives the facility information from the base station; a transmission unit that transmits the facility information to an outside via power line carrier communication using the power line as a communication line; have 5. A transmission device as described in claim 4.

[0132] (Appendix 6) Used in the power transmission equipment monitoring system described in Appendix 1 or Appendix 2 Base station.

[0133] (Appendix 7) a power receiving unit that receives power in a non-contact manner from a transmission device that receives power by electromagnetic induction from a magnetic field generated around a power line; A battery that stores power from the power receiving unit; an information acquisition unit that acquires equipment information related to a power transmission facility having the power line by using the power supplied via the power receiving unit; a transmission unit that transmits the facility information from the information acquisition unit to the transmission device; have Base station.

[0134] (Appendix 8) harvesting power from a magnetic field generated around the power line by electromagnetic induction using a transmission device; transmitting the power from the transmission device to a base station in a non-contact manner; acquiring, at the base station, facility information regarding a power transmission facility having the power line by using the power transmitted contactlessly from the transmission device; Equipped Power transmission equipment monitoring method.

[0135] (Appendix 9) transmitting the facility information from the base station to the transmission device; The transmission device transmits the facility information received from the base station to an outside via power line carrier communication using the power line as a communication line. 9. A method for monitoring power transmission equipment as described in appended claim 8. [Explanation of symbols]

[0136] 10 Power transmission equipment monitoring system 30 Transmission Equipment 50 base stations 70 Management Center 100 Power Lines 322 CT Department 322a Core 322b Coil 324 Power supply section 340 Power Supply Unit 342 Transmitting Antenna 360 Receiver 362 Antenna 380 Transmitter 382 Signal Generator 384 Circuit section 384a Blocking coil 384b Coupling Capacitor 512 Power receiving unit 512a receiving antenna 514 Rectifier 516 battery 518 Regulator 520 Information Acquisition Department 522 Camera 524 Sensors 530 Transmitter 532 Antenna 540 Control Unit 542 CPU 542a Power Control Unit 542b Information Aggregation Department 542c Transmission control section 544 RAM 546 Storage device 548 I / O ports 780 Receiving Unit 900 Steel Tower

Claims

1. A transmission device configured to obtain electric power by electromagnetic induction from a magnetic field generated around a power line and to transmit the electric power in a non-contact manner; a base station that acquires facility information related to a power transmission facility having the power line by using the power transmitted contactlessly from the transmission device; Equipped with The base station transmits the facility information to the transmission device, The transmission device transmits the facility information received from the base station to an external device via power line carrier communication using the power line as a communication line. Power transmission equipment monitoring system.

2. The power transmission facility monitoring system according to claim 1 is used. Transmission equipment.

3. The power transmission facility monitoring system according to claim 1 is used. Base station.

4. harvesting power from a magnetic field generated around the power line by electromagnetic induction using a transmission device; transmitting the power from the transmission device to a base station in a non-contact manner; acquiring, at the base station, facility information regarding a power transmission facility having the power line by using the power transmitted contactlessly from the transmission device; transmitting the facility information from the base station to the transmission device; transmitting the facility information received by the transmission device from the base station to an outside from the transmission device by power line carrier communication using the power line as a communication line; Equipped Power transmission equipment monitoring method.

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