JP2009293946A - Power transmission/distribution facility monitoring system, and power transmission/distribution facility monitoring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power transmission/distribution facility monitoring system, and a power transmission/distribution facility monitoring method for improving the efficiency of a maintenance work in power transmission/distribution facilities. <P>SOLUTION: The power transmission/distribution facility monitoring system for remotely monitoring a plurality of the power transmission/distribution facilities includes: a detecting section for detecting respective sounds or vibrations provided in a plurality of the power transmission/distribution facilities; an obtaining section for obtaining accident information, including an accident time at which an accident occurs in the accidental power transmission/distribution facility; and an identifying section for identifying the accidental power transmission/distribution facility, based on detection data for indicating the sound or vibration detected by the detecting section at the accident time, included in the accident information obtained by the obtaining section or for a predetermined duration including the accident time. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power transmission / distribution facility monitoring system and a power transmission / distribution facility monitoring method.

A failure point detection system that detects a failure point (ground fault point or short-circuit point) of a transmission / distribution line installed on a support such as a transmission tower or distribution pole has been proposed.
For example, Patent Literature 1 discloses a technique in which an acoustic sensor is installed on a lever of a distribution pole, and acoustic radiation at a deteriorated portion of an overhead distribution line is detected and transmitted.
Patent Documents 2 and 3 disclose a method for detecting a failure point based on a result of measuring a failure current and sound generated when a transmission line fails in a transmission tower, and a technique related to the apparatus. ing.
JP-A-6-347451 Japanese Patent Application Laid-Open No. 11-125652 JP 2002-340967 A

  By the way, in the technique disclosed in Patent Document 1, fatigue cracks (deterioration) that occur in the wires in the overhead distribution line due to abnormal vibration caused by wind are detected based on the output of the acoustic sensor. Therefore, since it depends only on the output of the acoustic sensor, there is a risk of erroneous detection of the failure point due to the influence of dark noise such as wind noise, rain noise, corona noise, etc. The failure point is not targeted for detection.

  In the techniques disclosed in Patent Documents 2 and 3, a failure point detection device and a display device are installed on a power transmission tower or distribution pole. For this reason, in the event of a failure, it is necessary for the patrolman to go to the site, check the power transmission towers and distribution poles one after another to confirm the failure point, and then bring the necessary tools to the repair staff for repairs. .

  The main present invention for solving the above-mentioned problems is a power transmission / distribution facility monitoring system for remotely monitoring a plurality of power transmission / distribution facilities, a detection unit for detecting sound or vibration provided for each of the plurality of power transmission / distribution facilities, and an accident. An acquisition unit that acquires accident information including an accident time point of an accident transmission / distribution facility where the accident occurred, and an accident time point included in the accident information acquired by the acquisition unit or a predetermined period including the accident time point is detected by the detection unit. And a specifying unit for specifying the accident transmission / distribution facility based on detection data indicating noise or vibration.

  In the above system, the accident information may include an accident section, and the specifying unit may specify the power transmission and distribution equipment in the accident section as a target.

  Further, the storage unit stores detection data indicating sound or vibration detected by the detection unit in association with the detection time of the detection data and the power transmission / distribution equipment, and the specifying unit stores the accident time point. The accident transmission / distribution facility may be specified based on a level change of time-series detection data stored in the storage unit, which is associated with the power transmission / distribution facility in a predetermined period including the accident section.

  In addition, the storage unit stores the detection data indicating the sound or vibration detected by the detection unit in association with the detection time of the detection data and the power transmission / distribution equipment. The detection data outside the predetermined level range is searched from the time-series detection data stored in the storage unit, which is associated with the power transmission / distribution equipment in the predetermined period including the accident section, and the search is performed. The power transmission / distribution facility associated with the detected data may be specified as the accident power transmission / distribution facility. The predetermined level range is preferably set for each day of the week or for each time period based on detection data for each day of the week or each time period stored in the storage unit.

  The power transmission / distribution facility may be a power transmission tower or a distribution pole, and the accident may be a ground fault or a short-circuit accident in a power transmission line installed on the power transmission tower or a distribution line installed on the power distribution pillar. Also good.

  Moreover, you may have the imaging | photography part provided in the said power transmission / distribution installation, and the display part which displays the image | video image | photographed by the said imaging | photography part.

  ADVANTAGE OF THE INVENTION According to this invention, the power transmission / distribution equipment monitoring system and the power transmission / distribution equipment monitoring method which aim at the efficiency improvement of the maintenance work of a power transmission / distribution equipment can be provided.

<<< Overall configuration of power transmission and distribution equipment monitoring system >>>
Based on FIG. 1, the whole structure of the power transmission and distribution equipment monitoring system according to an embodiment of the present invention will be described with reference to FIG. The power transmission / distribution equipment monitoring system shown in FIG. 1 remotely monitors the power transmission / distribution equipment constituting the power transmission / distribution system at a central monitoring control station (central power supply command office, sales office, branch office, etc. of an electric power company) Accident transmission / distribution equipment is highly accurate by collating with accident information including accident time acquired separately by sound (for example, flashing (short) sound) generated when an accident occurs in the transmission / distribution equipment. It is a system to be specified.

  In the power transmission / distribution system shown in FIG. 1, power transmitted from a circuit breaker 9 disposed in a power plant or a power transmission substation is used for power distribution via a power transmission line C installed between a plurality of power transmission towers 40. The example of the system | strain by which the electric power supplied to the substations A and B and further transformed by the distribution substations A and B is supplied to the consumers (not shown) via the distribution lines A and B is shown.

  Circuit breakers 11a and 11b are connected to the secondary side of the transformers 10 and 10b installed in the distribution substations A and B. The relay devices 16 a and 16 b function as slave stations for the master station 103 of the monitoring control device 100 disposed in the central monitoring control station, and the circuit breakers 11 a and 11 b are connected to the distribution line A according to a command from the monitoring control device 100. , B is automatically opened / closed when an accident occurs.

  On the secondary side of the circuit breakers 11a and 11b, zero-phase current detectors 18a and 18b for detecting a ground fault and overcurrent detectors 19a and 19b for detecting a short-circuit accident are installed. These detection results are transmitted to the monitoring control device 100 via the relay devices 16a and 16b.

  Distribution lines A and B are divided into a plurality of sections #n (n = 0, 1,...) By normally closed section switches 12a and 12b. In addition, in at least any one of the plurality of sections #n in the distribution line A, the connection with the distribution line B is performed via the normally open connection switch 13 installed at the branch destination of the main line. The system is done. The slave stations 14a and 14b are installed for each of the sorting switches 12a and 12b and the interconnection switch 13.

  The slave stations 14a and 14b are connected to the communication line 210 (optical fiber cable, metal line) and the communication network 200 via the relay devices 16a and 16b provided in the distribution substations A and B. The slave stations 14a and 14b receive the function of transmitting the opening / closing information indicating the open / closed state of the division switches 12a and 12b to the monitoring control device 200 and the opening command or the closing command from the monitoring control device 200. And the function of controlling the opening or closing of the segment switches 12a and 12b and the interconnection switch 13. Note that the zero-phase current detectors 18a and 18b and the overcurrent detectors 19a and 19b may be provided for each of the slave stations 14a and 14b.

Distribution poles 30a and 30b are arranged for each of a plurality of sections #n divided by the division switches 12a and 12b.
The power distribution columns 30a and 30b are provided with sound sensors 15a and 15b that detect the self-distribution columns 30a and 30b and the surrounding sounds. As the sound sensors 15a and 15b, dynamic (electromagnetic induction type) microphones, condenser microphones, ultrasonic sensors, and the like are used. In particular, a flashing sound generated due to a ground fault or a short-circuit accident is targeted for detection. The flashing sound is a discharge sound generated when a potential difference between the distribution poles 30a and 30b and the distribution lines A and B increases and a flashing (or reverse flashing) occurs between the arc horns of the insulator 302. Further, as shown in FIG. 2, the sound sensors 15a and 15b are easy to detect a flashing sound such as an insulator 302 provided on the arm metal 301 above the distribution poles 30a and 30b or a transformer around it. It is installed at the place.

  In addition, as shown in FIG. 2, monitoring cameras 17a and 17b are installed in the upper and lower portions of the distribution poles 30a and 30b, respectively. Since the upper monitoring camera 17a is installed at a position where human approach is rare, it is preferable that the upper monitoring camera 17a can be rotated 360 degrees in order to monitor the situation around the power distribution poles 30a and 30b over a wide range. The lower monitoring camera 17b plays a complementary role in monitoring by the upper monitoring camera 17a. However, since the lower monitoring camera 17b is installed at a position where there is a possibility of approaching a person, it is installed at an inconspicuous position by embedding or the like. Is preferred.

  Furthermore, data transmission devices 20a and 20b that transmit various status signals (sound, video, etc.) of the self-distribution columns 30a and 30b to the monitoring control device 200 are installed in the distribution columns 30a and 30b. The data transmission devices 20a and 20b are connected to the communication line 210 and the communication network 200 via the relay devices 16a and 16b provided in the distribution substations A and B, similarly to the slave stations 14a and 14b.

  Similarly to the distribution poles 30a and 30b, the power transmission tower 40 includes a sound sensor 15c that detects sound around the power transmission tower 40, a monitoring camera (not shown), and various status signals (sound, video, etc.) of the power transmission tower 40. ) Is transmitted to the monitoring and control apparatus 200.

The monitoring control device 100 is configured by connecting a CPU 101, a display device 102, a master station 103, and a database 104 so that they can communicate with each other.
The CPU 101 is an information processing apparatus that performs overall control of the entire system based on information received from the slave stations 14 a and 14 b and the data transmission apparatuses 20 a to 20 c in the master station 103, information stored in the database 104, and the like.
The display device 102 displays the result of information processing by the CPU 101 and the video of the power transmission and distribution equipment taken by the monitoring cameras 17a and 17b.

  The master station 103 is connected to the slave stations 14a and 14b and the data transmission apparatuses 20a to 20c via the communication line 210 and the communication network 200 and the relay apparatuses 10 and 16a so as to be able to communicate with each other. The master station 103 has a function of receiving various status signals (sound, video, opening / closing information, etc.) from the slave stations 14a and 14b and the data transmission devices 20a to 20c, and a section switch 12a via the slave stations 14a and 14b. And a function of transmitting an opening command or a closing command to 12b. The database 104 accumulates and stores sound pressure data as will be described later.

  As described above, the power transmission and distribution equipment monitoring system is constructed, and the monitoring and control device 100 disposed in the central monitoring and control station is used for power transmission and distribution equipment such as the division switches 12a and 12b, the power distribution columns 30a and 30b, the power transmission tower 40, and the like. The power transmission and distribution facilities including the power transmission line C and the distribution lines A and B are remotely monitored and controlled by various state signals from the installed slave stations 14a and 14b and the data transmission devices 20a to 20c.

<<< Specific procedure for accident transmission and distribution facilities >>>
Based on the flowchart shown in FIG. 3 and referring to FIGS. 4 to 7 as appropriate, based on the collation between the sound detected when the accident occurs and the accident time point included in the accident information separately obtained, The procedure for identifying the accident power transmission / distribution facility of the power transmission / distribution facility monitoring system shown in FIG. 1 will be described below.

  First, the monitoring and control apparatus 100, in advance, detects the sound detected by the sound sensors 15a and 15b installed on the distribution poles 30a and 30b and the sound detected by the sound sensor 15c installed on the power transmission tower 40. Obtained by communication (for example, packet communication) between the master station 103 and the data transmission devices 20a to 20c (S300).

  Note that the monitoring control device 100 acquires sound detected by the sound sensors 15a to 15c as digital sound pressure data (dB) at a predetermined sampling period (for example, in units of seconds or units of minutes). At this time, it is preferable to acquire the noise data having a frequency other than the flash band frequency range (0 to 60 kHz) by frequency analysis.

  Next, as shown in FIG. 4, the monitoring and control device 100 classifies the sound pressure data acquired from the data transmission devices 20 a to 20 c by day of the week (Monday to Sunday) and by time zone (for example, every hour). However, it is stored in the database 104. Then, as shown in FIG. 5, a predetermined sound pressure level range (range from threshold A to threshold B shown in FIG. 5) to be regarded as no accident has been generated for each day of the week or time period stored in the database 104. Is set for each day of the week or each time period based on the sound pressure data. The predetermined sound pressure level range is, for example, a level of 10% or less from the upper limit level (threshold A shown in FIG. 5) to 10% or more from the lower limit level in the sound pressure data for each day of the week or each time period. The range is up to the level (threshold B shown in FIG. 5). It is known that the sound pressure of the flashing sound shows a sound pressure having a large level compared to the sound pressure of dark noise (wind sound, rain sound, corona noise, etc.). Therefore, it is preferable to set the threshold A to a level larger than the sound pressure of background noise.

  After the predetermined sound pressure level range is set as described above, the monitoring and control apparatus 100 constantly acquires sound pressure data from the sound sensors 15a to 15c (S300), and the time and distribution at which the sound pressure data is detected. They are stored in the database 104 in association with identifiers assigned to the power poles 30a, 30b and the power transmission tower 40. In addition, when storing in the database 104, as shown in FIG. 4, it is stored while being classified for each day of the week and each time zone.

  Next, the monitoring and control apparatus 100 acquires accident information including at least the accident time point, preferably accident information including at least the accident time point and the accident section (S301). In addition, as other accident information, the identifier provided to the distribution poles 30a and 30b and the power transmission tower 40 where the accident occurred is mentioned. As for the accident information acquisition procedure, for example, as shown in FIG. 6, the outline of the accident information acquisition procedure will be described below by taking as an example a case where a ground fault or a short-circuit accident occurs in the section # 1 of the distribution line A.

  When the accident occurs, the circuit breaker 11a is immediately opened (first interruption), and the entire distribution line A including the accident section # 1 becomes a power failure, and all the division switches 12a of the distribution line A are opened. After a certain period of time has elapsed since the first break of the circuit breaker 11a, the circuit breaker 11a is turned on again (reclosed). Timed in order. And if power transmission to accident area # 1 is performed, the circuit breaker 11a will be opened again (reclosing failure), and the whole distribution line A will be blacked out again. At this time, the section switch 12a in the accident section # 1 is locked to the open state thereafter. Therefore, the time of the accident can be detected by measuring the time from the reclosing to the reclosing failure, and the accident section # 1 can be detected based on the time of the accident and the locked state of the section switch 12a.

  Depending on the extent of the ground fault (for example, a micro ground fault), the circuit breaker 11a may not be opened, and the accident time point and the accident section may not be detected by the above procedure. However, the time of the accident can be detected by the detection timing of a ground fault detector (for example, a zero-phase current transformer) installed in the circuit breaker 11a of the distribution substation A.

  Next, the monitoring and control apparatus 100 identifies the accident power transmission and distribution equipment based on the sound pressure data detected at the time of the accident included in the acquired accident information (S302). Specifically, the accident time point included in the accident information is compared with the detection time of the sound pressure data stored in the database 104, and within a predetermined period (for example, 1 second before and after) including the accident time point stored in the database 104. Data out of a predetermined sound pressure level range is searched from the time-series sound pressure data detected in the above. Then, the power transmission / distribution equipment associated with the searched sound pressure data is specified as the accident power transmission / distribution equipment.

  In addition, when the accident information is detected not only at the time of the accident but also about the accident section, the sound pressure data stored in the database 104 associated with the power transmission / distribution equipment in the predetermined period including the accident point and the accident section is included. Therefore, it is preferable to search for data that is out of the predetermined sound pressure level range and to identify the power transmission / distribution equipment associated with the searched sound pressure data as the accident power transmission / distribution equipment. For example, in the example shown in FIG. 7 (the system of distribution line A is assumed), the accident time point is within the range from time t4 to time t6, and distribution poles 30a with identifiers 0 to 4 are included in the accident section. In this case, the sound pressure data detected by the sound sensor 15a of the distribution pole 30a with the identifiers 1 to 3 at time t5 is out of the predetermined sound pressure level range. Accordingly, the distribution poles 30a having the identifiers 1 to 3 are specified as the candidates for the accident transmission and distribution equipment.

  A procedure for specifying an accident transmission / distribution facility without setting a predetermined sound pressure level range (that is, without collecting sound pressure data in advance) is also conceivable. For example, in the sound pressure data stored in the database 104, sound pressure data (for example, a predetermined sound pressure change gradient (sound per unit time) in which the sound pressure changes sharply within a predetermined period including the time of the accident. (Sound pressure data whose pressure change amount) exceeds a predetermined threshold level) may be searched, and the power transmission / distribution equipment associated with the sound pressure data may be specified as the accident power transmission / distribution equipment.

  Next, the monitoring and control apparatus 100 displays the information on the specified accident transmission / distribution facility on the display device 102 (S303). As a result, the monitor can display the video of the accident site photographed by the monitoring cameras 17a and 17b of the accident transmission / distribution facility on the display device 102, and can confirm a more detailed accident situation.

  By the way, the power transmission / distribution equipment may cause abnormal vibration in addition to generating abnormal sound (the above-mentioned flashing sound) in the event of an accident. Examples of accidents that cause abnormal vibrations include, for example, disconnection of power transmission line C and distribution lines A and B due to strong winds, and disconnection and corrosion due to snow load on power transmission line C and distribution lines A and B due to snowfall. Can be mentioned. At this time, since a ground fault or short circuit accident occurs due to disconnection or the like, the zero point current detectors 18a and 18b and the overcurrent detectors 19a and 19b determine the time of the accident as in the case of the abnormal sound. Accident information including at least is acquired.

  Therefore, in order to detect abnormal vibration that occurs in the event of a power transmission / distribution facility, a vibration sensor (not shown) such as a capacitance type, eddy current type, or piezoelectric element type may be used instead of the sound sensors 15a to 15c. good. That is, the power transmission / distribution equipment monitoring system uses the specific procedure of the accident power transmission / distribution equipment in the case of the sound sensors 15a to 15c and the configuration for executing the procedure, and the displacement indicating the vibration detected by the vibration sensor. By collating the data with the accident time point included in the accident information acquired separately, the accident transmission / distribution facility can be specified remotely and with high accuracy.

  As described above, the power transmission / distribution facility monitoring system according to the present invention does not depend on only the sound detected by the sound sensors 15a to 15c provided for each remote power transmission / distribution facility or the vibration detected by the vibration sensor, and is separately acquired. The accident transmission / distribution equipment can be identified remotely and with high accuracy by collating with the accident time point included in the accident information. The reason why it can be specified with high accuracy is that the influence of light vibrations caused by background noise such as wind noise, rain noise, corona noise, and rain / snow that cannot be said to be an accident can be more reliably suppressed. As a result, it is possible to promptly move to the subsequent recovery process, and the efficiency of maintenance work can be improved.

  If accident information can be obtained not only at the time of the accident but also the accident section, the accident transmission / distribution equipment can be identified with higher accuracy by comparing the accident time and section with the detection data indicating sound or vibration. Can be done.

  In addition, identification of accident transmission / distribution equipment based on the time change at the time of the accident and the level change in the time-series detection data indicating the sound or vibration stored in the storage unit associated with the transmission / distribution equipment in the accident section Can be performed more efficiently.

  In addition, by setting a predetermined sound pressure level range or a predetermined displacement level range when no accident has occurred, the accident power transmission / distribution facility by collating the accident time point and accident section with detection data indicating sound or vibration Can be identified with higher accuracy and efficiency. Furthermore, if a predetermined sound pressure level range or a predetermined displacement level range is defined for each day of the week or each time zone, it is possible to specify the accident transmission / distribution equipment more accurately in a form that takes into account the on-site situation. it can.

  In addition, the power transmission / distribution equipment provided with the sound sensors 15a to 15c and the vibration sensor is the power transmission tower 40 or the power distribution poles 30a, 30b, so that the accident can be prevented. Sound sensors 15a to 15c and vibration sensors can be provided at places where they are likely to occur. In this case, a ground fault or a short-circuit accident that is a major accident of the transmission line C installed on the transmission tower 40 or the distribution lines A and B installed on the distribution poles 30a and 30b can be detected. .

  Further, by providing the monitoring cameras 17a and 17b in the power transmission / distribution facility, it becomes possible for the monitor to remotely verify the details of the accident after identifying the accident power transmission / distribution facility.

  Although the present embodiment has been described above, the above-described examples are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed / improved without departing from the spirit thereof, and the present invention includes equivalents thereof.

It is the figure which showed the whole structure of the power transmission and distribution equipment monitoring system which concerns on one Embodiment of this invention. It is the figure which showed the installation aspect in the distribution pole of the sound sensor which concerns on one Embodiment of this invention, and a surveillance camera. It is the flowchart which showed the specific procedure of the accident transmission / distribution installation by the transmission / distribution installation monitoring system which concerns on one Embodiment of this invention. It is the figure which showed the format at the time of memorize | storing the sound pressure data to the database which concerns on one Embodiment of this invention. It is a figure for demonstrating the predetermined sound pressure level range which concerns on one Embodiment of this invention. It is a figure for demonstrating the acquisition procedure of the accident information which concerns on one Embodiment of this invention. It is a figure for demonstrating the specific procedure of the accident transmission and distribution equipment which concerns on one Embodiment of this invention.

Explanation of symbols

14a, 14b Slave station (acquisition part)
15a, 15b, 15c Sound sensor (detection unit)
16a, 16b Relay device (acquiring unit)
17a, 17b Surveillance camera (shooting unit)
18a, 18b Zero-phase current detector (acquisition part)
19a, 19b Overcurrent detector (acquisition part)
20a to 20c Data transmission devices 30a, 30b Distribution pole 40 Transmission tower 100 Monitoring and control device (computer)
101 CPU (specific part)
102 Display device (display unit)
103 Master station (acquisition department)
104 Database (storage unit)
200 Communication network (acquisition part)
210 Communication line (acquisition part)

Claims (9)

In the power transmission and distribution equipment monitoring system that remotely monitors multiple power transmission and distribution equipment,
A detection unit for detecting sound or vibration provided for each of the plurality of power transmission and distribution facilities;
An acquisition unit that acquires accident information including the accident point of the accident transmission and distribution equipment where the accident occurred;
A specification that identifies the accident transmission / distribution facility based on detection data indicating sound or vibration detected by the detection unit in an accident time point included in the accident information acquired by the acquisition unit or in a predetermined period including the accident time point And
A power transmission and distribution equipment monitoring system characterized by comprising: In the power transmission and distribution equipment monitoring system according to claim 1,
The accident information includes an accident section,
The power transmission / distribution equipment monitoring system, wherein the specifying unit specifies the power transmission / distribution equipment in the accident section. In the power transmission and distribution equipment monitoring system according to claim 1,
A storage unit that stores detection data indicating sound or vibration detected by the detection unit in association with the detection time of the detection data and the power transmission and distribution equipment;
The identification unit is configured to correspond to the power transmission / distribution equipment in the predetermined period including the accident time point and the accident section, and the accident power transmission / distribution equipment based on a level change of time-series detection data stored in the storage unit. To identify
Power transmission / distribution equipment monitoring system. In the power transmission and distribution equipment monitoring system according to claim 1,
A storage unit that stores detection data indicating sound or vibration detected by the detection unit in association with the detection time of the detection data and the power transmission and distribution equipment;
The specific unit is out of a predetermined level range from the time-series detection data stored in the storage unit, which is associated with the power transmission and distribution equipment in the accident period and the predetermined period including the accident time point. Searching for detection data and identifying the power transmission and distribution equipment associated with the detected detection data as the accident power transmission and distribution equipment;
Power transmission / distribution equipment monitoring system. In the power transmission and distribution equipment monitoring system according to claim 4,
The predetermined level range is set for each day of the week or for each time period, based on detection data for each day of the week or time period stored in the storage unit;
Power transmission / distribution equipment monitoring system. In the power transmission and distribution equipment monitoring system according to claim 1,
The power transmission and distribution equipment is a power transmission tower or distribution pole,
Power transmission / distribution equipment monitoring system. In the power transmission and distribution equipment monitoring system according to claim 6,
The accident is a ground fault or a short-circuit accident in a transmission line installed in the transmission tower or a distribution line installed in the distribution pole;
Power transmission / distribution equipment monitoring system. In the power transmission and distribution equipment monitoring system according to claim 1,
An imaging unit that is provided in the power transmission and distribution equipment and photographs the status of the power transmission and distribution equipment;
A display unit for displaying an image captured by the imaging unit;
A power transmission and distribution equipment monitoring system characterized by comprising: In the power transmission / distribution facility monitoring method in which a computer that is communicably connected to a plurality of power transmission / distribution facilities remotely monitors the plurality of power transmission / distribution facilities,
The computer acquires detection data indicating sound or vibration detected by a detection unit provided for each of the plurality of power transmission / distribution facilities, and acquires accident information including an accident time point of the accident power transmission / distribution facility where the accident occurred. Steps,
The computer specifies the accident transmission / distribution facility based on detection data indicating sound or vibration detected by the detection unit in a predetermined period including the accident time point or the accident time point included in the acquired accident information. When,
A power transmission / distribution facility monitoring method characterized by comprising:

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