JPWO2020162325A1 - Disconnection detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disconnection detection device capable of identifying a disconnection location of a high voltage transmission line. SOLUTION: This is a disconnection detection device for detecting disconnection points in a first transmission line S1000 and a second transmission line S1000, in parallel with each of the first transmission line S1000 and the second transmission line S1000. A resistance meter S3200 to be connected, a first and second connection lines S3105 connected to each resistance meter S3200, and a plurality of resistance elements S3110 connected in parallel to the first and second connection lines S3105, respectively. Based on the resistance value detected by the resistance tester S3200, the resistance value of each resistance element S3110, and the number of resistance elements S3110, it is specified which of the resistance elements S3110 is the electric wire location. [Selection diagram] Fig. 2

Description

The present invention relates to a disconnection detection device, and more particularly to a transmission line disconnection detection device.

Patent Document 1 discloses an electric wire having a function as a disconnection sensor by incorporating a resistor. In this electric wire, when a disconnection occurs in the electric wire, the disconnection point can be specified by measuring the electric resistance of the electric wire.

Japanese Unexamined Patent Publication No. 2009-48383

However, although the electric wire disclosed in Patent Document 1 can identify the disconnection point, if the method disclosed in Patent Document 1 is to be applied to the transmission line as it is, the transmission line usually has several thousand volts. It is difficult to realize this because high voltage transmission of up to 500,000V is performed.

Therefore, it is an object of the present invention to provide a disconnection detection device capable of identifying a disconnection location of a high voltage transmission line.

In order to solve the above problems, the disconnection detection device of the present invention is used.
A disconnection detection device for detecting disconnection points in a first transmission line (for example, transmission line S1000 in FIG. 2) and a second transmission line (for example, transmission line S1000 in FIG. 2).
A resistance meter connected to the first transmission line and the second transmission line (for example, the resistance meter S3200 in FIG. 2) and
A first and second connection line (for example, connection line S3105 in FIG. 2) connected in parallel to the first transmission line and the second transmission line, respectively.
A plurality of resistance elements (for example, the resistance element S3110 in FIG. 2) connected in parallel to the first and second connection lines, respectively.
Equipped with
Based on the resistance value detected by the resistance meter, the resistance value of each resistance element, and the number of the resistance elements, it is specified which resistance element is between the wire locations.

It is also possible to provide a plurality of accommodating devices (for example, accommodating device S3100 in FIG. 2) for accommodating each of the resistance elements.

Each of the resistance elements is, for example, as shown in FIG. 2, between the first connection line and the first transmission line, or between the second connection line and the second transmission line. It may be connected in parallel across any of the above.

Each of the resistance elements may be connected in parallel to the first or second connection line, for example, as shown in FIG.

Each accommodating device may include a connecting member that connects the first or second connecting line and the resistance element accommodated in the accommodating device.

Each accommodating device may also include a connecting member (eg, connecting member S3320 in FIG. 4A) that is connected in parallel to the first or second connecting line and is connected to the resistance element.

Embodiment of the invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic explanatory view of the disconnection detection device S3000 according to the first embodiment of the present invention. FIG. 1 shows a power transmission source S2000 such as a power plant owned or managed by an electric power company, a power transmission line S1000 having one end connected in parallel to the power transmission line S2000, and a plurality of power transmissions suspending each power transmission line S1000. It shows a steel tower S1100, a power transmission destination S2100 such as a substation to which the other end of the power transmission line S1000 is connected, and a disconnection detection device S3000 electrically connected to each power transmission line S1000.

Although two transmission lines S1000 are shown here for the purpose of single-phase AC, the disconnection detection device S3000 may be used even for AC three-phase three-wire type, AC three-phase four-wire type, DC type, and the like. Can be applied. Further, FIG. 1 merely conceptually illustrates the disconnection detection device S3000, and is actually configured as described below.

FIG. 2 is an explanatory diagram of the disconnection detection device S3000 shown in FIG. In FIG. 2, a resistance meter S3200 provided in parallel to each transmission line S1000, a connection line S3105 connected to each resistance meter S3200, and each transmission line S1000 are connected to each other. A transformer S2200 that converts the voltage to be transmitted, a plurality of accommodating devices S3100 arranged at appropriate intervals on each transmission line S1000, and a plurality of terminals S3125 connecting each accommodating device S3100 and each transmission line S1000. Each accommodating device S3100 includes a plurality of resistance elements S3110 that are accommodated and directly connected to each terminal S3125.

It should be noted that the transformer S2200 itself is not an essential component of the disconnection detection device S3000. These transformers S2200 are for single-phase alternating current, but if the transmission line S1000 is a three-phase three-wire system or a three-phase four-wire system, the number of lines may be adjusted accordingly. .. Further, in the case of the DC system, it is not necessary to provide the transformer S2200.

Further, in FIG. 2, for convenience of explanation, a frame of the disconnection detection device S3000 so as to surround the transformer S2200, the resistance meter S3200 on the upper side of the drawing, the connection line S3105, the accommodating device S3100, the terminal S3125, and the resistance element S3110. However, in reality, the members on the lower side of the drawing corresponding to these are also included in the disconnection detection device S3000.

Further, for example, the connection line S3105 in the frame of the disconnection detection device S3000 in FIG. 2 corresponds to the first connection line in the claims, and the connection line S3105 outside the frame is the second connection line in the claims. It corresponds to a connecting line. Similarly, with respect to the other members, the accommodating device S3100, the terminal S3125, and the resistance element S3110, the one inside the frame of the disconnection detection device S3000 corresponds to the "first", and the one outside the frame corresponds to the "second". ..

Further, in the normal state, each connection line S3105 is suspended and fixed to each transmission line S1000 so that a large pulling force or shearing force is not applied and the robustness is maintained by this. There is.

Further, physically, for example, one long transmission line S1000 may be prepared and each accommodation device S3100 may be attached to the transmission line S1000, or the accommodation devices S3100 may be sequentially arranged with a relatively short one. It may be connected.

Next, the operating principle of the disconnection detection device S3000 shown in FIG. 2 will be described. First, when each transmission line S1000 and each connection line S3105 are conducting, the electric resistance of each transmission line S1000 and each connection line S3105 is actually slight, so that they are detected by the resistance meter S3200. The resistance value will show this slight electric resistance value.

However, in theory, since each connection line S3105 is grounded to each transmission line S1000, the resistance value detected by the resistance meter S3200 is almost zero. Treat as if the value is zero.

In this state, it is assumed that the transmission line S1000 is disconnected at the point A shown in FIG. In this case, according to Ohm's law, the resistance value detected by the resistance meter S3200 can be expressed by Equation 1.
Resistance value of resistance meter S3200 = [resistance value of resistance element S3110] / [disconnection at the corresponding position between the third accommodating device S3100 and the fourth accommodating device S3100 with reference to the transformer S2200]

Therefore, assuming that all the resistance elements S3110 have 100 kΩ, if this is substituted into the formula 1, the result shown in the formula 2 can be obtained.
Resistance value of resistance meter S3200 = [100kΩ] / [3] ≈ 33.3kΩ

According to this principle, first, it is possible to detect that a disconnection has occurred in the transmission line S1000 due to a large change in the resistance value detected by the resistance meter S3200. Further, depending on the resistance value itself detected by the resistance meter S3200, the number of accommodating devices S3100, and the resistance value of the resistance element S3110, it is possible to determine which accommodating device S3100 has a disconnection point generated in the transmission line S1000. Can be identified.

Here, the formula 1 can be generalized like the formula 3.
[Disconnection point (position corresponding between the nth accommodating device S3100 and the n + 1st accommodating device S3100 with respect to the transformer S2200)] = [resistance value of the resistance element S3110] / [resistance value of the resistance meter S3200] ]

For example, the resistance detected by the resistance meter S3200 under the same conditions as above that the number of the accommodating devices S3100 is four as shown in FIG. 2 and the resistance values of the respective resistance elements S3110 are all 100 kΩ. It is assumed that the value itself changes from about 0Ω to about 100kΩ. Substituting these conditions into Equation 3 yields Equation 4.
Disconnection point = [100kΩ] / [100kΩ] = 1

That is, when the resistance value detected by the resistance meter S3200 changes as described above, the position corresponding to the position (for example, for example) between the first accommodating device S3100 and the second accommodating device S3100 with respect to the transformer S2200. It can be specified that the disconnection has occurred at point B).

According to the configuration of the disconnection detection device S3000 shown in FIG. 2, the quantity of the accommodation device S3100 can be appropriately determined according to the length of the transmission line S1000, and in an environment where disconnection is likely to occur in the transmission line S1000. There is an advantage that it can be increased if there is. Further, the connection line S3105 can be extended by further connecting the electric wires to be the connection line S3105 in the same manner as in the configuration shown in FIG.

FIG. 3 is a schematic configuration diagram of the accommodating device S3100 shown in FIG. In addition, here, the configuration in the case where each accommodating device S3100 is sequentially connected by a relatively short transmission line S1000 is illustrated. FIG. 3A is a schematic configuration diagram of the main body of the accommodation device S3100, and FIG. 3B is a perspective view of the housing of the main body of the accommodation device S3100 shown in FIG. 3A.

In FIG. 3A, for example, a resin-made rectangular base S3300, a resin-made columnar column 3310 attached to the base S3300, and a connecting line S3105 attached to the upper part of the support 3310 are mutually connected. It shows a connecting member S3320 made of a metal such as copper and having a substantially arch shape, which is electrically connected by a clamp or the like and is also electrically connected to the terminal S3125.

FIG. 3B shows, for example, a first plastic housing portion S3330 and, for example, a second plastic housing portion S3340, in which the main body of the accommodating device S3100 shown in FIG. 3A is accommodated. In this state, they are bonded using a binder (not shown) or the like.

The first housing portion S3330 and the second housing portion S3340 are each provided with a handle portion S3135 for attaching a member (not shown) for suspending the transmission line S1000, and further, a connecting line S3105 or the like is passed therethrough. A through hole is formed. A packing member or the like may be appropriately attached to each through hole in order to prevent wind and rain from entering the inside of the first housing portion S3330 and the second housing portion S3340.

(Embodiment 2)
FIG. 4 is an explanatory diagram of the disconnection detection device S3000 according to the second embodiment of the present invention, and corresponds to FIG. 2. In FIG. 4, the connection line S3105 is a double-track type for simplification, but it is electrically equivalent to that in FIG. When the configuration shown in FIG. 4 is adopted, the disconnection detection device S3000 simply connects the accommodating device S3100 and the connection line S3105 to the transmission line S1000 instead of connecting the transmission line S1000 and the connection line S3105 at a plurality of places. It can be fixed with a tie belt or the like, which has the advantage of improving workability.

FIG. 5 is a schematic configuration diagram of the accommodating device S3100 according to the disconnection detection device S3000 shown in FIG. 4, and corresponds to FIG. 3A. In FIG. 5, since the connecting line S3105 is a double-track type, the resistance elements S3110 are connected in parallel in a manner straddling the connecting members S3320 to each other. The housing of the accommodating device S3100 may have the same configuration as that shown in FIG. 3B.

It is a schematic explanatory drawing about the disconnection detection apparatus S3000 of Embodiment 1 of this invention. It is explanatory drawing of the disconnection detection apparatus S3000 shown in FIG. It is a schematic block diagram of the accommodating device S3100 main body shown in FIG. It is a perspective view of the housing of the accommodation device S3100 main body shown in FIG. 3A. It is explanatory drawing of the disconnection detection apparatus S3000 of Embodiment 2 of this invention. It is a schematic block diagram of the accommodating device S3100 which concerns on the disconnection detection device S3000 shown in FIG.

S2000 Transmission source S1000 Transmission line S1100 Transmission tower S2100 Transmission destination S2200 Transformer S3000 Disconnection detection device S3105 Connection line S3200 Resistance meter S3100 Containment device S3125 Terminal S3110 Resistance element S3300 Base S3310 Support

Claims (6)

It is a disconnection detection device that detects disconnection points in the first transmission line and the second transmission line.
An ohmmeter connected in parallel to the first transmission line and the second transmission line, respectively.
The first and second connection lines connected to each of the ohmmeters, respectively.
A plurality of resistance elements connected in parallel to the first and second connection lines, respectively, and
Equipped with
A disconnection detection device that identifies which resistance element is a wire location based on the resistance value detected by the resistance meter, the resistance value of each resistance element, and the number of the resistance elements. The disconnection detecting device according to claim 1, further comprising a plurality of accommodating devices accommodating each of the resistance elements. The resistance elements are connected in parallel across either the first connection line and the first transmission line or between the second connection line and the second transmission line. The disconnection detection device according to claim 1, which is connected. The disconnection detection device according to claim 1, wherein each resistance element is connected in parallel to the first or second connection line. The disconnection detecting device according to claim 2, wherein each accommodating device includes a connecting member for connecting the first or second connecting line and a resistance element accommodated in the accommodating device. The disconnection detecting device according to claim 2, wherein each accommodating device includes a connecting member connected in parallel to the first or second connecting line and connected to the resistance element.

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