CN110146774B - High-voltage alternating-current transmission cable short-circuit point detection system - Google Patents

Abstract

The invention discloses a high-voltage alternating-current transmission cable short-circuit point detection system, which belongs to the technical field of transmission equipment and aims to realize the detection of a short-circuit point of a high-voltage wire, and the high-voltage alternating-current transmission cable short-circuit point detection system comprises signal primary receiving and transmitting equipment arranged at the upper part of a transmission tower, signal transmission equipment arranged below the transmission tower, a processing center for transmitting signals with the signal transmission equipment and a display module arranged at the processing center; when the signal primary transceiving equipment on one or a plurality of power transmission towers does not send signals to the processing center through the signal transmission equipment, the processing center sends a fault signal of the power transmission tower to the display module, and the power transmission tower corresponding to the fault signal on the display module is displayed in grey. The short-circuit point of the high-voltage alternating-current transmission cable can be timely and accurately judged through information displayed on a display module of the processing center.

Description

A high-voltage AC transmission cable short-circuit point detection system

technical field

The invention belongs to the technical field of power transmission equipment, in particular to a short-circuit point detection system of a high-voltage AC power transmission cable.

Background technique

High-voltage AC transmission lines are the most important means of long-distance power transmission. Generally, high-voltage AC transmission lines are erected through transmission towers, and transmission towers are basically installed in remote places such as mountainous areas far away from people. High-voltage transmission lines are all exposed wires. , it is very easy to short-circuit, and it is very inconvenient to inspect the short-circuit point of the short-circuit of the high-voltage transmission line. Nowadays, drones or manned drones are generally used for inspections, which cannot be automatically judged, and inspections are frequent. Each inspection takes a long time and requires a lot of personnel.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a system for detecting short-circuit points of high-voltage AC transmission cables, so as to realize the purpose of detecting the short-circuit points of high-voltage lines.

Based on the above purpose, the present invention provides a system for detecting short-circuit points of high-voltage AC transmission cables. The high-voltage AC transmission lines are erected through transmission towers. A signal transmission device arranged under the transmission tower, a processing center for transmitting signals with the signal transmission device, and a display module arranged in the processing center; the preliminary signal sending and receiving device includes an installation frame arranged on the upper part of the transmission tower, and an installation frame arranged inside the installation frame. A rechargeable battery, a power generation module arranged on the installation frame and connected in series with the rechargeable battery, and a signal emission module arranged in the installation frame, the rechargeable battery includes a charging end and an output end, and the charging end and the output end are respectively provided with positive poles and the negative electrode, the power generation module is charged by the rechargeable battery, and the positive electrode and the negative electrode of the output end of the rechargeable battery are electrically connected with the signal emission module; the power generation module is a wire whose two ends are respectively connected with the positive electrode and the negative electrode of the charging end of the rechargeable battery. , generate electricity by inducing the alternating current of the high-voltage alternating current transmission line; the signal transmission device receives the signal sent by the signal transmitting module, amplifies the signal and sends it to the processing center; the processing center is electrically connected with the display module, when one or several power transmission When the preliminary signal transceiver equipment on the tower does not send the signal to the processing center through the signal transmission equipment, the processing center sends the transmission tower fault signal to the display module, and the corresponding transmission tower on the display module is displayed in gray.

The maximum capacity of the rechargeable battery is less than five times the power required by the signal transmitting module to transmit a signal each time.

The preliminary signal transceiver equipment of the high-voltage AC transmission cable short-circuit point detection system further includes a timing unit, the timing unit is electrically connected with the signal transmitting module through a wire, and the timing unit returns to re-timing every time the timing unit completes one time. After timing, a trigger signal is sent to the signal transmitting module, and the signal transmitting module will send a signal to the outside after receiving the trigger signal.

Each time of the timing unit is less than 1 minute.

The high-voltage AC transmission cable short-circuit point detection system further includes a relay signal forwarding module, the relay signal forwarding module is signally connected to the signal transmission equipment, and the working power of the relay signal forwarding module is far greater than that of the signal transmission equipment.

The power generation module can also be replaced with a power connection module. The power connection module includes two wires, one end of each of the two wires is respectively connected to two different high-voltage AC transmission lines, and the other end of each of the two wires is connected to the rechargeable battery. The positive and negative terminals of the charging end of the battery are connected.

The beneficial effects of the present invention are: through the information displayed on the display module of the processing center, the short-circuit point of the high-voltage AC power transmission cable can be judged timely and accurately.

Description of drawings

FIG. 1 is a schematic structural diagram of a system for detecting a short-circuit point of a high-voltage AC transmission cable in a specific embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a signal transmission device in a specific embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities with the same name but not the same or non-identical parameters. It can be seen that "first" and "second" It is only for the convenience of expression and should not be construed as a limitation to the embodiments of the present invention, and subsequent embodiments will not describe them one by one.

As shown in Figure 1, a high-voltage AC transmission cable short-circuit point detection system, the high-voltage AC transmission line is erected through the transmission tower, the transmission tower is relatively high, the upper part of the transmission tower is closer to the high-voltage AC transmission line, and the nearby magnetic field is relatively strong. Alternating current, the direction of the magnetic field changes periodically, leaving a benefit for utilizing the magnetic field. The high-voltage AC transmission cable short-circuit point detection system includes a preliminary signal transceiver device 1 arranged on the upper part of the transmission tower, a signal transmission device 2 arranged below the transmission tower, a processing center for transmitting signals with the signal transmission device 2, and a signal transmission device arranged in the processing center. Display module.

The preliminary signal transceiver 1 includes an installation frame 14 arranged on the upper part of the transmission tower, a rechargeable battery 11 arranged inside the installation frame 14, a power generation module arranged on the installation frame 14 and connected in series with the rechargeable battery 11, and a power generation module arranged in the installation frame 14. The signal transmitting module 12 in the frame 14 includes a charging end and an output end on the rechargeable battery 11, and the charging end and the output end are respectively provided with a positive electrode and a negative electrode. The power generation module charges the rechargeable battery 11, and the The positive pole and the negative pole of the output end are electrically connected to the signal transmitting module 12; the power generation module is a wire whose two ends are respectively connected to the positive pole and the negative pole of the charging end of the rechargeable battery 11, and generates electricity by inducing the alternating current of the high-voltage alternating current transmission line; the signal transmission The device 2 receives the signal sent by the signal transmitting module 12, and amplifies the signal and sends it to the processing center; the processing center is electrically connected with the display module, and when the preliminary signal transmission and reception device 1 on one or several transmission towers does not transmit the signal through the signal When the device 2 is sent to the processing center, the processing center sends the transmission tower fault signal to the display module, and the corresponding transmission tower on the display module is displayed in gray.

In order to shield the magnetic field and protect the internal equipment, the mounting frame 14 is a closed metal structure. In order to dissipate heat, the mounting frame 14 is provided with a heat dissipation hole on the side, and a rain-shielding brim is provided above the heat dissipation hole, which not only facilitates heat dissipation, but also effectively prevents rain and snow from entering the interior of the mounting frame 14 . In order to effectively discharge the rain and snow entering the interior of the mounting frame 14 in a timely manner, the bottom inner surface of the mounting frame 14 is inclined, and a drain hole is provided at the lowest point inside the bottom of the mounting frame 14, and both ends of the drain hole are respectively connected to the mounting frame. The inside of 14 and the outside of the bottom of the mounting frame 14 effectively prevent rainwater from entering the mounting frame 14 through the drain hole. The drain hole is located outside the mounting frame 14 with an annular protrusion, and the annular protrusion surrounds the end of the drain hole outside the mounting frame 14 to prevent the water flowing along the bottom of the mounting frame 14 from entering the drain hole.

In order to be able to give an alarm in time, the maximum capacity of the rechargeable battery 11 is less than five times the power required by the signal transmitting module 12 to transmit a signal each time. When there is no current passing through the high-voltage AC transmission line, the rechargeable battery 11 cannot be charged. When the power in the rechargeable battery 11 is exhausted, the preliminary signal transceiver device 1 cannot send the signal to the processing center through the signal transmission device 2, and the display module A fault signal of the transmission tower where the signal transmission device 2 is located will be sent, and the corresponding transmission tower on the display module will be displayed in gray.

In order to send signals regularly, the preliminary signal transceiver device 1 further includes a timing unit 13, the timing unit 13 is electrically connected with the signal transmitting module 12 through a wire, and the timing unit 13 returns to a new state after each timing is completed. Timing, the timing unit 13 sends a trigger signal to the signal transmitting module 12 every time the timing is completed, and the signal transmitting module 12 sends a signal to the outside after receiving the trigger signal.

In order to respond in a timely manner and prevent the total usage time of the electricity in the rechargeable battery 11 from being too long, the timing unit 13 counts for less than 1 minute each time.

Generally, the transmission tower is far away from the processing center. In order to transmit signals over a long distance and facilitate long-distance control, the high-voltage AC transmission cable short-circuit point detection system further includes a relay signal forwarding module 3, which is connected to the signal transmission module 3. The device 2 is signal-connected, and the working power of the relay signal forwarding module 3 is much greater than that of the signal transmission device.

Since the rechargeable battery 11 has a lifespan of charging times, the power of the rechargeable battery 11 in the present application is particularly small, which leads to frequent charging, which further reduces the total usable time of the rechargeable battery 11, and the transmission towers are more frequently installed. In hard-to-reach areas, such as mountains, to increase the reliability and service life of the high-voltage AC transmission cable short-circuit point detection system, the power generation module can also be replaced with a power connection module, and the power connection module includes two wires One end of each of the two wires is respectively connected to two different high-voltage AC transmission lines, and the other end of each of the two wires is respectively connected to the positive and negative electrodes of the charging end of the rechargeable battery 11 .

As a further improvement of the present invention, the power generation module can be directly electrically connected to the signal transmission module 12, and the power generation module directly provides energy to the signal transmission module 12 after generating electricity. The number of rechargeable batteries 11 or power connection modules is reduced, the system cost is reduced, and the use reliability of the system is increased.

Embodiments of the present invention are intended to cover all such alternatives, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (1)

1. A high-voltage alternating-current transmission cable short-circuit point detection system is characterized in that a high-voltage alternating-current transmission cable is erected through a transmission tower, and comprises a signal primary receiving and transmitting device (1) arranged at the upper part of the transmission tower, a signal transmission device (2) arranged below the transmission tower, a processing center for transmitting signals with the signal transmission device (2) and a display module arranged at the processing center;

the signal primary transceiving equipment (1) comprises a mounting frame (14) arranged at the upper part of a power transmission tower, a rechargeable battery (11) arranged in the mounting frame (14), a power generation module arranged on the mounting frame (14) and connected with the rechargeable battery (11) in series, and a signal transmission module (12) arranged in the mounting frame (14), wherein the rechargeable battery (11) comprises a charging end and an output end, the charging end and the output end are respectively provided with a positive pole and a negative pole, the power generation module charges the rechargeable battery (11), and the positive pole and the negative pole of the output end of the rechargeable battery (11) are electrically connected with the signal transmission module (12);

the power generation module is a conducting wire with two ends respectively connected with the anode and the cathode of the charging end of the rechargeable battery (11), and generates power by sensing alternating current of a high-voltage alternating current transmission line;

the signal transmission equipment (2) receives the signal sent by the signal transmitting module (12), amplifies the signal and sends the amplified signal to the processing center;

the processing center is electrically connected with the display module, when the signal primary transceiving equipment (1) on one or a plurality of power transmission towers does not send signals to the processing center through the signal transmission equipment (2), the processing center sends fault signals of the power transmission towers to the display module, and the power transmission towers corresponding to the display module are displayed as grey; the maximum capacity of the rechargeable battery (11) is less than five times of the electric quantity required by the signal transmitting module (12) for transmitting signals each time; the signal primary transceiving equipment (1) of the high-voltage alternating-current transmission cable short-circuit point detection system further comprises a timing unit (13), the timing unit (13) is electrically connected with the signal transmitting module (12) through a conducting wire, the timing unit (13) recovers to re-time after timing is completed each time, the timing unit (13) sends a trigger signal to the signal transmitting module (12) after timing is completed each time, and the signal transmitting module (12) sends a signal outwards after receiving the trigger signal; the time counted each time by the timing unit (13) is less than 1 minute; the high-voltage alternating-current transmission cable short-circuit point detection system further comprises a relay signal forwarding module (3), the relay signal forwarding module (3) is in signal connection with the signal transmission equipment (2), and the working power of the relay signal forwarding module (3) is far greater than that of the signal transmission equipment;

the mounting frame (14) is of a closed metal structure, heat dissipation holes are formed in the side face of the mounting frame (14), a rain-shielding visor is arranged above the outer portion of each heat dissipation hole, the inner surface of the bottom of the mounting frame (14) is inclined, a drain hole is formed in the lowest point of the inner portion of the bottom of the mounting frame (14), two ends of the drain hole are respectively located in the mounting frame (14) and the outer portion of the bottom of the mounting frame (14), an annular bulge is formed in the position, located outside the mounting frame (14), of the drain hole, and one end, located outside the mounting frame (14), of the drain hole is encircled by the annular bulge.

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