JPH0718907B2 - Lightning position detection device for power transmission system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightning strike position detecting device for specifying a lightning strike position on a transmission line or in the vicinity thereof, and more specifically to improving the accuracy of lightning strike position detection. This relates to simplification of the device.

2. Description of the Related Art Conventionally known means for detecting a lightning strike position in a power transmission system include, for example, receiving a lightning surge (or shock pulse) generated at the time of a lightning strike at both ends of the transmission line, and detecting the difference in reception time. By specifying the lightning strike position by or by sending a predetermined detection pulse toward the lightning strike position from one end of the transmission line at the time of a lightning strike, while receiving the reflected pulse reflected at the lightning strike position at that time, For example, the lightning strike position is specified based on the time difference between the time when the detection pulse is transmitted and the time when the detection pulse is received.

Problems to be Solved by the Invention However, such a conventional lightning strike position detection means needs to be connected to one end or both ends of one transmission line through a coupling device, which makes the structure complicated. There was a problem.

Also, when the conventional lightning strike position detection means is connected to a transmission line that is branched in various ways, reflection of the pulse to be detected occurs between the transmission lines, and as a result, a pulse interference state occurs. However, there was a problem that it was almost impossible to identify the location of the lightning strike.

Means for Solving the Problems The present invention has been made to solve the problems of the prior art, and is arranged at each predetermined position in the area where the transmission line is laid and the lightning strike is detected. The lightning strike position is obtained from a plurality of antennas that generate direction information, lightning strike direction information from each antenna, and position information of each antenna, and lightning strike position information that indicates this lightning strike position by longitude and latitude is generated. A lightning strike position calculation means, a map data storage means that stores position information indicating the position of the transmission line in terms of longitude and latitude, a longitude and latitude of the lightning strike position information from the lightning strike position calculation means, and map data The difference between the longitude and the latitude of the position information of the power transmission line stored in the storage means is calculated, and the calculated difference of the longitude and the difference of the latitude of the power transmission line is within a predetermined range. The present invention is characterized by comprising a lightning strike transmission line identifying means having a position as a lightning strike position and a lightning strike information notifying means for giving notice of information on a power transmission line whose lightning strike position is determined by the lightning strike power transmission line identifying means.

Action If there is a lightning strike in the area where the transmission line is laid, lightning strike detection means
The lightning strike position calculating means 2 calculates the lightning strike position for the lightning strike detecting means 1a, 1b based on the lightning strike direction and the position information of the lightning strike detecting means 1a, 1b. On the other hand, the lightning strike position specifying means 4 is the map data storage means 3
Based on the position information of the power transmission line from the power transmission line and the lightning position information from the lightning strike position calculation means 2, and geographically specify the power transmission line where the lightning strike occurred or its vicinity, and notify the lightning strike information including an appropriate display device or the like. The means 5 notifies.

Embodiments The present invention will be described below with reference to the drawings.

In FIG. 1, reference numerals 1a and 1b are antennas as lightning strike detection means, and the antennas 1a and 1b are arranged at predetermined positions (for example, two) in an area where a predetermined number of power transmission lines are laid. Then, the falling signal including the information of the lightning strike direction of each antenna 1a, 1b is output to the lightning strike position calculating means 2, and the output of this lightning strike position calculating means 2 is the map data storage means 3. Is output to the lightning strike power transmission line identifying means 4, and the lightning strike power transmission line identifying means 4 is supplied to the lightning strike information notifying means 5. Here, the lightning strike position calculation means 2 calculates the lightning strike position based on the direction of the lightning strike obtained from each antenna 1a, 1b and the arrangement position of each antenna 1a, 1b, and the map data storage means 3 Stores information about each transmission line such as the name of the transmission line laid in the area, the extension state of the overhead line, the installation position of its support, and the name of the overhead line and its support, Furthermore, lightning transmission line identification means 4
Receives the outputs of the lightning strike position calculation means 2 and the map data storage means 3 to specify the position of the power transmission line where the lightning strike or the vicinity thereof.

Then, the output of the lightning strike transmission line identifying means 4 is supplied to the lightning strike information notifying means 5, and the lightning strike information notifying means 4 displays the name of the power transmission line where the lightning strike, the overhead line or the name of the support, and the like. ing.

The antennas 1a and 1b and the lightning strike position calculating means are conventionally commercially available as a combined device (for example, under the name of lightning strike position locating device). For example, antenna
The following are used as 1a and 1b. Two antennas
1a and 1b have a directivity of an 8-character characteristic and are arranged so that the directions in which the maximum transmission output is generated are 90 degrees with respect to each other.
The output from the antenna having this directivity shows the possibility of two directions as the source of the output at this time.

Since the two antennas are arranged as described above, the lightning strike position calculation means 2 is a point where the two directions indicated by the output of one antenna and the two directions indicated by the output of the other antenna intersect each other. Then, the lightning strike position is obtained from the position of each antenna. For example, a lightning strike position can be specified (for example, in the form of east longitude Et, north latitude Nt) with an accuracy of ± 1 km within an area of 100 km square.

Next, the operation of the embodiment configured as described above will be specifically described.

When there is a lightning strike on a predetermined power transmission line, the antennas 1a and 1b know this, and the lightning strike position calculating means 2 calculates the lightning strike position. Then, the location of the lightning strike specified by this calculation (for example, East longitude E
t, coordinates represented by north latitude Nt) and the position coordinates of each power transmission system (for example, in the case of the m system) stored in the map data storage means 3, for example, the first power transmission system as shown in FIG. In S ₁ , the east longitude E ₀₁ , E ₁₁ …… En ₁ , north latitude N ₀₁ ,
N ₁₁ … N n ₁ , and in the second transmission system S ₂ east longitudes E ₀₂ , E ₁₂ ….
... The lightning strike transmission line identification means performs comparison and comparison with those that are associated such as En ₂ , north latitude ₀₂ , N ₁₂ ... Nn ₂ etc. The comparison and comparison in this case include, for example, the lightning strike position coordinate element Et obtained by the lightning strike position calculation means 2 and the position coordinate elements E ₀₁ , E ₁₁ ... En ₁ , E ₀₂ , E _{12 of the} map data storage means 3. …… E
n ₂ etc. difference d ₁ and another lightning strike position coordinate element Nt
The difference d ₂ with N ₀₁ , N ₁₁ …… Nn ₁ , N ₀₂ , N ₁₂ … Nn ₂ etc. is within a predetermined range, for example 1 minute 19 seconds in the former (at a distance of about 2 km in the east-west direction near 35 ° north latitude) Equivalent), for example 1 min 05 sec in the latter (3 latitudes north
The work is to extract all combinations of position coordinates within a range of about 5 ° (corresponding to a distance of about 2 km in the north-south direction).

In this way, the work of extracting the combination of position coordinates is completed, and the lightning strike position of the lightning strike or the lightning strike position of the power transmission line closest to the lightning strike position (Et, Nt) as shown in FIG. When the lightning strike position (Exi, Nxi) and the lightning strike position (Eyj, Nyj) of the transmission line Sj intersecting with the lightning strike position (Exi, Nxi) are specified, the name of the transmission line and the lightning strike of the overhead line are detected by the lightning strike transmission line identification means 4. The lightning strike information notifying means 5 notifies the lightning strike location of the location, the support (steel tower, etc.) where the lightning strike occurs, or the location near the lightning strike position of the transmission lines Si, Sj, etc. Here, the lightning strike information notifying means 5 identifies the lightning strike position as described above. For example, the name of the transmitted power transmission line is displayed on the CRT display D, or the alarm buzzer B is activated when a lightning strike hits the transmission line directly.

In addition to the above-mentioned position coordinates of the power transmission line, the map data storage means 3 stores, for example, the names of characteristic targets (famous buildings, mountains, etc.) near the installation position of the support. By setting, it is possible to increase the notification information by the lightning strike information notification means 5. Further, although the power transmission system is usually provided with a protection relay system, it is also possible to input the operation status of this protection relay system at the time of a lightning strike to the lightning strike transmission line notification means 5 to notify it. Thus, the reliability of the lightning strike notification information can be improved.

EFFECTS OF THE INVENTION As described above, according to the present invention, a direct coupling device with a power transmission line, such as a lightning strike position detecting means in a conventional power transmission system, is not required, and accordingly, the complexity of the configuration is reduced. On the other hand, since it is not necessary to superimpose a pulse for detecting the lightning strike position on the transmission line, it can be applied to a multi-branch transmission system where it has been difficult to specify the lightning strike position. As a result, the detection accuracy of the lightning strike position can be improved.

Further, even if the area where the power transmission line is installed covers a wide range of 100 to 200 km, it is possible to detect the lightning strike position by installing two to three antennas as lightning strike detection means. As described above, it is possible to significantly reduce the capital investment as compared with the case where the lightning strike position detecting means is provided for each transmission line.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a schematic configuration diagram illustrating position coordinates of a power transmission line, and FIG. 3 is a schematic configuration diagram illustrating a relationship between a lightning strike position and a proximity power transmission line. . 1a, 1b ... Antenna (lightning strike detection means), 2 ... Lightning strike position calculation means, 3 ... Map data storage means, 4 ... Lightning strike transmission line identification means, 5 ... Lightning strike information notification means.

Claims (1)

[Claims] 1. A plurality of antennas, each of which is arranged at a predetermined position in an area where a power transmission line is laid, and which detects a lightning strike and generates information on a lightning strike direction, and information on a lightning strike direction from each antenna. , The lightning strike position is obtained from the position information of each antenna, and the lightning strike position calculating means for generating the lightning strike position information indicating the lightning strike position by the longitude and the latitude, and the position of the transmission line are indicated by the longitude and the latitude, respectively. Map data storage means for storing the position information, the longitude and latitude of the lightning strike position information from the lightning strike position calculation means, and the difference between the longitude and latitude of the power transmission line position information stored by the map data storage means Calculate each,
Lightning strike transmission line identification means for determining the location of the transmission line where the calculated difference in longitude and the difference in latitude are each within a predetermined range, and information on the transmission line whose lightning location has been determined by the lightning transmission line identification means. And a lightning strike position detecting device for a power transmission system, which has a lightning strike information notifying means for notifying the user.