JPH05191909A - Monitoring equipment for vibration of overhead line - Google Patents

Abstract

PURPOSE:To make it possible to execute proper maintenance by installing vibration sensors to overhead lines, transmitting the output of the sensors from a transmitter and receiving and monitoring the output by a monitoring portion. CONSTITUTION:A signal detected by a vibration sensor 11 is transmitted from a transmitter 13 of an air unit 10 suspended from an overhead line 1 to a ground unit 20 in the form of radio waves. Thus, the vibration state of the overhead line 1 can be automatically monitored and analyzed for 24 hours by recording and analyzing the signals received by the monitor unit 24 in the ground unit 20, and proper alarm can be generated as required.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead line vibration monitoring device for constantly monitoring the vibration state of an overhead line.

[0002]

Background Art Overhead lines are easily exposed to natural disasters. In particular, vibration due to wind causes metal fatigue in the vicinity of the suspension part and causes breakage of the electric wire. In order to prevent such an accident, various measures have been taken, for example, a method of attaching a damper to a power transmission line is also adopted. On the other hand, for maintenance and management of such an overhead wire, while observing the appearance with the naked eye on a regular basis, a flaw detection device is run on the overhead wire to detect breakage of the strand. Conventionally, such a method is used to prevent accidents due to natural disasters on overhead lines.

[0003]

However, the observation by the patrol and the inspection using the flaw detection device have a drawback that the maintenance load increases if the interval is shortened. The present invention has been made in view of the above points, and an object of the present invention is to provide an overhead line vibration monitoring device capable of constantly and automatically monitoring the vibration state of an overhead line.

[0004]

An overhead line vibration monitoring apparatus of the present invention is a vibration sensor attached to an overhead line, a signal processing unit for receiving and processing the output of the vibration sensor, and a processing result of the signal processing unit. And a monitoring unit that receives the processing result and monitors the vibration of the overhead line.

[0005]

In this device, the vibration sensor 11 is directly attached to the overhead line 1, and the output signal thereof is sent to the signal processing unit 12 and the transmission unit 13.
To send by radio waves. The monitoring unit 24 receives the radio waves and the like and constantly monitors the vibration state of the overhead line 1. As a result, the monitoring unit 24 can continuously record and monitor the vibration applied to the overhead line 1, so that the fatigue state can be accurately estimated and appropriate maintenance management can be performed.

[0006]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a schematic view showing an embodiment of an overhead line vibration monitoring device of the present invention. In FIG.
The aerial unit 10 and the ground unit 20 constitute the overhead line vibration monitoring device of the present invention. The aerial unit 10 is a vibration sensor 1 directly attached to the overhead line 1.
1, a signal processing unit 12, a transmitting unit 13, a power supply unit 14, and a current transformer 15. Vibration sensor 11
Is for detecting the vibration of an acceleration sensor that uses a Hall element and the built-in magnet with a coil, or for extracting the output of a strain gauge that supports a pendulum, and for detecting a well-known vibration and extracting an electrical signal. It is composed of sensors.
The signal processing unit 12 is a circuit that receives, amplifies, and processes the output of the vibration sensor 11. Also, the transmitter 1
3 modulates the output signal of the signal processing unit 12, and the antenna 1
It is composed of a circuit for transmitting via 7. The power supply unit 14 is a circuit for supplying driving power to the signal processing unit 12 and the transmission unit 13.

The aerial device 10 is suspended from the overhead wire 1 by using a clamp 16. Therefore, electric power cannot be supplied from the outside. Therefore, in this embodiment, a well-known through-type current transformer 15 is attached to the overhead wire 1 and is connected to the power supply unit 14 to obtain the required power. In addition, this power supply unit 14
May be composed of, for example, a solar cell or a battery.

On the other hand, the radio wave transmitted from the airborne device 10 is
It is configured to be received by the ground device 20. The ground device 20 is provided with an antenna 21, a reception unit 22, a calculation unit 23, and a monitoring unit 24. The antenna 21 receives a radio wave transmitted from the antenna 17 of the aerial device 10, and the receiving unit 22 is configured by a circuit that demodulates the radio wave and extracts an original signal. The calculation unit 23 is a unit that receives the output signal of the reception unit 22 and performs processing for vibration state analysis. This includes, for example, a circuit that generates a signal for recording the vibration waveform in a recorder (not shown) in the monitoring unit 24. Further, the computing unit 23 may incorporate a computer or the like that computes the amplitude and the number of vibrations and other data necessary for maintenance and management of the power transmission line 1. The monitoring unit 24 includes
In addition to the recorder, a display for displaying various kinds of information to an observer, a controller for controlling the arithmetic operation of the arithmetic unit 23, and the like are provided.

In the overhead line vibration monitoring apparatus of the present invention having the above-described structure, the signal detected by the vibration sensor 11 from the aerial unit 10 suspended on the overhead line 1 is transmitted by radio waves to the ground unit 20.
Sent to. Therefore, if the signal received by the ground equipment 20 is recorded and analyzed, the overhead line 1 is automatically operated for 24 hours.
It is possible to monitor and analyze the vibration state of and to issue appropriate alarms and the like as necessary. Also, like the example above,
If the power supply of the aerial unit 10 is configured to be a so-called maintenance-free configuration, maintenance of the aerial unit 10 itself is not required unless a circuit failure or the like occurs.

In the above embodiment, the aerial container 10
Although the detection signal is transmitted from the ground device 20 to the ground device 20, the transmission unit 13 and the reception unit 22 are connected to the overhead line 1
If they are connected via optical fibers arranged in parallel with each other, they can be incorporated in an information transmission system between substations using conventional optical fibers. Further, when a solar cell or the like is used, in order to save transmission power, when the vibration of the overhead line 1 is very small, the transmitter 13 is not operated, and a certain threshold or more vibration is exceeded. The transmission operation may be performed only when the above occurs. For example, when a large vibration of the overhead line 1 is caused by a typhoon or the like, if the state is notified using the overhead line vibration monitoring device according to the present invention, appropriate measures can be taken more quickly than before. .. In addition to the case where the aerial device 10 as described above is independently attached to the overhead line 1, it is also possible to incorporate it into a structure that is conventionally attached to the overhead line 1 as follows.

FIG. 2 is a side view of a damper, which is conventionally suspended from an overhead wire 1, for preventing vibration. This damper is suspended from an overhead wire 1 via an armor rod 2, and is composed of a suspension portion 31 and an arm 32. The overhead line vibration monitoring device of the present invention can be housed inside such a damper, for example, inside the hanging portion 31. That is, the aerial device 1 is installed inside the suspending portion 31.
The current transformer 1 is used to house the substrate that constitutes 0.
Incorporate 5. Further, for example, the arm 32 is used as it is as a substitute for the antenna. Alternatively, the antenna is attached to the arm 32. As a result, it becomes possible to attach the aerial vessels 10 at the same time as the usual damper installation work. In addition to such a damper, various accessories such as multiconductor spacers are attached to the overhead wire. The overhead line vibration monitoring device of the present invention may be incorporated into an accessory of this type.

[0012]

The above-described overhead line vibration monitoring device is provided with a vibration sensor attached to the overhead line, and the output of the sensor is transmitted by the transmitting section, and the monitoring section monitors the signal while receiving it. It is possible to monitor the vibration status of electric wires at all times or in real time when necessary.
It is possible to perform appropriate maintenance management that cannot be obtained by regular diagnosis, which has been performed conventionally.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of an overhead line vibration monitoring device of the present invention.

FIG. 2 is a side view of a damper showing another embodiment of the device of the present invention.

[Explanation of symbols]

 1 Overhead Line 10 Aerial Unit 11 Vibration Sensor 12 Signal Processing Unit 13 Transmitting Unit 20 Ground Unit 22 Receiving Unit 23 Computing Unit 24 Monitoring Unit

Claims (1)

[Claims] 1. A vibration sensor attached to an overhead wire, a signal processing unit that receives and processes the output of the vibration sensor, a transmission unit that transmits the processing result of the signal processing unit, and a receiving unit that receives the processing result. An overhead line vibration monitoring device comprising: a monitoring unit that monitors the vibration of the overhead line.