JPH01305301A - Detecting method of amount of lateral swing of transmission line - Google Patents

Abstract

PURPOSE:To enable the execution of 24-hour continuous observation irrespective of day or night by fitting infrared emission LED to an electric wire and by making it emit a light using a current transformer provided on the electric wire separately as a power source. CONSTITUTION:A current transformer 2 is fitted to an electric wire 1 and transforms an electrification current of the wire 1 into a current of a required voltage, while infrared emission LED 3is fitted at one point on the electric wire 1 and emits an infrared ray, using the current transformer 2 as a power source. An ITV camera 5 which can sense the infrared ray is installed on the pylon 6 side and set so that it can pick up an emission of the LED 3 constantly, and it takes up the movement of the LED 3, i.e. the movement of the electric wire 1, as a spot and displays the same on a TV screen. Thereby the behavior of a lateral swing of the electric wire 1 can be image and observed on the 24-hour basis irrespective of day or night, on condition that power transmission is made through the electric wire 1. Accordingly the reliability thereof is improved, since the LED 3 is fixed at one point on the electric wire 1 and the movement of the wire 1is taken up as a spot; besides, the accuracy in observation of the lateral swing is improved sharply.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for detecting the amount of lateral deflection that can continuously detect lateral deflection caused by wind pressure on the main line or jumper wire of an overhead power transmission line day and night. be.

[Conventional technology] Overhead power transmission lines installed between steel towers are constantly exposed to wind pressure. It is subject to vibration due to runout.

Even if the vibration is just a breeze, it can cause fatigue failure over many years, and abnormal vibrations such as gear lopping can lead to damage to the track. In particular, jumper wires have the problem of maintaining the insulation distance between them and the steel tower, and if large lateral vibrations are observed, measures must be taken to avoid this.

Therefore, until now, the amount of lateral deflection of the wire has been measured and detected by photographing the wire with an ITV (industrial television) and capturing the displacement of the wire using the image.

[Problem to be Solved by the Invention] However, the above image of the electric wire shows that g! The method of detecting runout is to observe the average behavior of the wire, so it was not necessarily accurate.

In addition, the above method mainly focuses on observing lateral vibrations during the day,
This was insufficient for estimating behavior at night.

In view of the above-mentioned circumstances, the purpose of the present invention is to provide a highly accurate lateral vibration detection method that allows continuous observation 24 hours a day, day or night, and also enables information analysis by spotting the behavior and recording it in screen coordinates. This is what we are trying to provide.

[Means for Solving the Problems] The present invention provides T! An infrared LED (light emitting diode, the same applies hereinafter) is attached to one wire, and a current transformer (C
T) is used as a power source to emit light, and the emitted light from the LED is photographed by an infrared receiving ITV, and the amount of lateral deflection of the electric wire can be determined from the movement of the LED.

[Function] If power is obtained from the CT and the infrared emitting LED is made to emit light, 2
It is possible to emit light continuously for 4 hours, and by continuously photographing this with an infrared ITV and turning it into an image, and giving the coordinates to the TV screen, the LED spot can be displayed or memorized as a point coordinate, and it can be used day and night. It is possible to detect and analyze the precise amount of lateral deflection of electric wires.

[Example] The present invention will be described below with reference to the drawings.

FIG. 1 shows how an electric wire 1 is
FIG. 3 is an explanatory diagram showing how lateral shake is detected.

Reference numeral 2 denotes a CT that is attached to the electric wire 1 and converts the electric current of the electric current into a current of the required voltage; 3 is an infrared emitting LE that is attached to one point of the electric wire 1 and emits infrared light using the current transformer 2 as a power source.
D and 4 are lead wires.

It is recommended that LED3 include a circuit that converts the output from CT2 to the voltage level required for LED light emission, and a circuit that adjusts fluctuations in the output of CT2 to a voltage level within a certain range. Although it may be continuous, in order to maintain a long lifespan of the LED 3, it is desirable to emit light in a pulsed manner at intervals of several ms or less.

On the other hand, on the side of the steel tower 6, there is an ITV camera 5 that can receive infrared light.
is installed and set so that the light emitted from the LED 3 can be photographed at all times, so that the movement of the LED 3, that is, the movement of the electric wire 1, can be captured as a spot and displayed on the TV screen.

Since the present invention is configured to emit infrared light and receive the infrared light using a current transformer as a power source as described above, as long as power is being transmitted to the electric wire 1, it can be operated next to the electric wire 1 24 hours a day, regardless of day or night. The shake behavior can be imaged and observed, and its reliability can be significantly improved compared to the conventional example.

Moreover, the present invention does not observe the electric wire 1 itself for lateral vibration, but rather fixes the LED 3 at one point on the electric wire 1 and spots the movement of the electric wire 1, greatly improving the observation accuracy. ing.

That is, the TV screen of the ITV camera 5 has, for example, a horizontal
4 x vertical 52 = 3328 points of sensors are provided, and the LED
If the spot of light 3 is taken as the coordinates of the sensor point, the position of 1[1 can be stored in a separate memory as two-dimensional coordinates, and if necessary, it can be analyzed by a calculation device to determine the position of the electric wire 1. Since various information regarding lateral vibration can be obtained, the detection accuracy can be improved to an extent incomparable to conventional methods. At this time, a limit sensor point may be specified in the sensor coordinates, and an alarm may be issued if the LED spot swings beyond the limit sensor point.

In order to detect the lateral vibration of the main line of the power transmission line by the method according to the present invention, it is preferable to set the ITV camera 5 to take images from a substantially horizontal direction. In this case, the distance between the ITV camera 5 and the LED 3 is By keeping the distance sufficient, such as several tens of meters or more, it is possible to simultaneously observe six phases of a two-circuit power transmission line. Therefore, when observing multiple phase conductors (including jumper wires) 1x, 1g, 1s, etc. simultaneously in this way, each phase u, v, w is required as shown in Figure 2.・
In order to make identification possible, it is preferable to install LEDs in different numbers, such as 31, 32, 33, and so on.

Furthermore, phase recognition is also possible by utilizing the phase difference of three-phase alternating current and changing the emission phase of each phase of u, v, and w as shown in FIG. That is, as shown in FIG.
By causing the ED to emit light at a current of 172 or more with a peak value 1a of either the positive or negative waveform of the power transmission current, the light emission of the conductor of the three-phase power line is ordered, and each phase of the three-phase conductor is It can be identified by the difference in emission time.

In addition, when observing the lateral deflection of jumper wires, attach the ITV camera 5 to the upper arm of the tower or the ground wire arm.
It is desirable to shoot downwards.

[Effects of the Invention] As described above, according to the lateral runout amount detection method according to the present invention,
It can produce the following excellent effects.

(1) Power is obtained from the conductor current of the power transmission line, so LE
D. Light emission does not require other power sources such as batteries or solar cells.

(2) Since infrared light emitting LEDs are used, it is possible to monitor the behavior of electric wires regardless of day or night.

(3) By changing the shape, number, or phase of the LED lights depending on the phase, it is possible to observe the behavior of the conductor from a phase-aware perspective.

(4) Divide the ITV TV screen into coordinates and
The location can be immediately stored in memory as coordinates and analyzed as various information.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the implementation status of the present invention, Fig. 2 is an explanatory diagram showing an example in which the number of LEDs is changed for each phase, and Fig. 3 is an explanatory diagram showing an example in which the number of LEDs is changed for each phase.
FIG. 3 is an explanatory diagram showing a case where the light emission phase of the LED in the phase current is changed to the phase difference side. 1: Electric wire, 2: CT (current transformer), 3: LED. 5: ITV camera. Agent: Patent Attorney Fujio SatoFigure 1Figure 2

Claims (3)

[Claims] (1) Attach an infrared LED to the conductor of the power transmission line, and
A current transformer with D attached to the conductor is used as a power source to emit light,
The displacement of the emitted LED was photographed with a TV camera that was separately attached to the steel tower and capable of receiving infrared light, and the amount of lateral deflection of the conductor was measured using the LED.
A method for detecting the amount of lateral deflection of a power transmission line by detecting the point coordinates of the D spot on a television screen. (2) The method for detecting the amount of lateral runout according to claim 1, wherein the number or shape of the LEDs attached to each phase conductor of the power transmission line is made different so that the lateral runout of each phase can be identified and detected simultaneously. (3) By causing the LED to emit light at a current that is 1/2 or more of the peak value of either the positive or negative waveform of the power transmission current, the light emission of the conductor of the three-phase power transmission line is ordered, and the three-phase conductor 2. The method for detecting the amount of lateral shake according to claim 1, wherein the lateral shake is detected by identifying each phase based on the light emission time difference.