JPS6313153B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power transmission line failure location detection 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 location detection device that observes the waveform of a propagated surge through a power 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 fault location detection device is configured as described above, the distance must be calculated from the surge propagation time, which has the disadvantage that the fault location can be determined inaccurately.

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 locator to indicate the operating status of the transmission line. It is an object of the present invention to provide a power transmission line fault position detecting device that can accurately locate a fault point by being configured 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 an optical fiber cutter 31, a short optical fiber for cutting 32, and a power transmission line fault detection section 33. 34 is an optical connector.

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 interlocking the optical fiber cutter 31,
The short optical fiber for cutting 32 is cut, and the optical path of the optical fiber 23 is cut off. Since each power line failure detector 22 is monitored by an optical fiber ortholocator 24 via an optical fiber 23, when the optical fiber cutter 31 of one power line failure detector 22 breaks the optical path, , it is possible to accurately locate the position of the power transmission line failure detector 22, that is, the position of the failure point.
In addition, the cut short optical fiber 32 for cutting
is replaced with a new one by connecting the connector when inspecting the power transmission line, and the optical fiber disconnector 31 and the power transmission line failure detection unit 33 are also restored at the same time.

Furthermore, by using a portable optical fiber ortholocator when inspecting power transmission lines, it is easy to find out whether or not there is a fault point beyond the initially detected fault point, and if there is a fault point, its location. be able to.

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.

Furthermore, even after a failure occurs, the optical path can be restored by simply connecting the connector, which has the advantage of easy maintenance work.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a conventional power transmission line fault location detection device, FIG. 2 is a block diagram showing the configuration of a power transmission line fault location detection device according to an embodiment of the present invention, and FIG. FIG. 2 is a block diagram showing the configuration of a power transmission line fault detector used in the device of FIG. In the figure, 1...power line, 21...steel tower, 2
2...Power line fault detector, 23...Optical fiber,
24...Optical fiber ortholocator, 31...
Optical fiber cutter, 32... short optical fiber for cutting, 33... power transmission line failure detection section, 34... optical connector. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. The above-mentioned power transmission line failure detector comprises 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. includes a power transmission line failure detection unit that detects that a failure has occurred in the power transmission line, and a power transmission line failure detection unit that disconnects the optical path of the optical fiber in response to an output signal when the power transmission line failure detection unit detects a failure in the power transmission line. 1. A power transmission line fault position detection device comprising: a short optical fiber for cutting, the ends of which are connected to the optical fiber by connectors;