JPS6313152B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power transmission line failure remote monitoring device for accurately detecting the location from a distance when a power transmission line accident occurs due to a lightning strike or the like.

In Fig. 1, which shows an example of a conventional power transmission line fault remote monitoring device that observes the waveform of a propagated surge through a transmission line phase conductor, 1 is a power transmission line, 2 is a PD,
3 is a surge wave detector, 4 is a transmitter, 5 is a micro carrier end, 6 is a receiver, and 7 is a counter.

In the device shown in Fig. 1, when a failure occurs in the power transmission line 1, the surge waveform caused by this failure is
The signal is input to the waveform detection device 3 via PDs 2 provided at both ends of the monitoring section. Detection of this fault surge triggers the transmitter 4 and receiver 6, respectively, and the transmitter 4 sends a signal to the receiver 6 via the microcarrier end 5. On the receiver 6 side, the counter 7 is started when triggered and stopped when the signal from the transmitter 4 is received. The count value of counter 7 is
Since this indicates the time difference between when the surge reached both ends of the monitoring section from the failure point, the distance to the failure point is calculated from this time difference.

Since the conventional power transmission line failure remote monitoring device is configured as described above, the distance must be calculated from the surge propagation time, which has the disadvantage that the determination of the failure location becomes inaccurate.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and uses a fault detection indicator installed on each tower separately from the power transmission line fault remote monitoring device to monitor the operating status of the transmission line. It is an object of the present invention to provide a power transmission line fault remote monitoring device that can accurately locate the fault point by configuring the power transmission line so that it can be monitored from a distance.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, reference numeral 1 indicates a power transmission line, and reference numeral 2 indicates a steel tower that supports the power transmission line 1. A power transmission line fault detector 22 installed on each tower 21 is connected to an optical fiber 23 connected to an overhead ground wire. and is connected to the optical fiber ortholocator 24.

As shown in FIG. 3, each power transmission line fault detector 22
consists of a transflective optical switch 31, an optical switch driving section 32, and a power transmission line fault detection section 33. 34 is a recovery terminal.

When a failure occurs in the power transmission line 1, among the transmission line failure detectors 22 installed in each tower 21, the transmission line failure detection unit 33 of the one closest to the failure point operates,
By turning off the optical switch 31 via the optical switch driving section 32, the optical path of the optical fiber 23 is branched into two. Each power transmission line failure detector 22 is connected to an optical fiber ortholocator 2 via an optical fiber 23.
4, when the optical switch 31 of one transmission line failure detector 22 is turned off, the position of this transmission line failure detector 22, that is, the position of the failure point, can be accurately located. . The optical switch 32 that has been turned off is turned back on by connecting a battery to the restoration terminal 34 during inspection of the power transmission line, thereby restoring everything to its original state.

FIG. 4 shows an example in which a timer 35 is provided to supply a recovery signal to the optical switch drive unit 32 after a preset period of time as a means for returning the optical switch 31 to its original state after it has been activated. . According to this example, the power transmission line failure detector 22 automatically recovers after a certain period of time after a power transmission line failure is detected.

In the above embodiment, it is assumed that the optical fiber is combined with the overhead ground wire, but the optical fiber may be combined with the phase conductor or may be laid alone.

As described above, according to the present invention, each power transmission line failure detector installed on a transmission line tower is connected to an optical fiber ortholocator via an optical fiber, so that when a failure occurs in a power transmission line, This has the effect of accurately detecting the failure point.

[Brief explanation of the drawing]

1 is a block diagram showing the configuration of a conventional power transmission line failure remote monitoring device, FIG. 2 is a block diagram showing the configuration of a power transmission line failure remote monitoring device according to an embodiment of the present invention, and FIG. 3 is a block diagram showing the configuration of a power transmission line failure remote monitoring device according to an embodiment of the present invention. FIG. 4 is a block diagram showing the configuration of a power transmission line failure detector used in the apparatus of the present invention, and FIG. 4 is a block diagram showing the configuration of a power transmission line failure detector in another embodiment. DESCRIPTION OF SYMBOLS 1... Power transmission line, 21... Steel tower, 22... Power line failure detector, 23... Optical fiber, 24... Optical fiber ortholocator, 31... Optical switch,
32... Optical switch drive unit, 33... Power line failure detection unit, 34... Recovery terminal, 35... Timer.
Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A power transmission line failure detection unit installed in each of the steel towers supporting the power transmission line, and an optical fiber fluorotorquator to which each power transmission line failure detection unit is connected via an optical fiber, The power transmission line fault detector includes a power transmission line fault detection section that detects that a fault has occurred in the power transmission line, and an output signal when the transmission line fault detection section detects a fault in the power transmission line. 1. A power transmission line failure remote monitoring device comprising: an optical switch drive unit that drives a transflective optical switch so as to branch an optical fiber optical path into two. 2. The power transmission line failure detection unit is characterized by comprising a timer for restoring each part to the state before the failure detection after a certain period of time from the time when the power transmission line failure detection unit detects the failure of the power transmission line. A power transmission line failure remote monitoring device according to claim 1.