High-voltage cable grounding wire operation state monitoring device

Abstract

The utility model relates to a high-voltage cable grounding wire operation state monitoring device, which is characterized in that a direct grounding side monitoring device and a switching device are arranged on the direct grounding side of a high-voltage cable, and a protection grounding side monitoring device is arranged on the protection grounding side of the high-voltage cable. The device can improve the accuracy and reliability of monitoring the operation condition of the high-voltage cable, and improves the operation safety of the high-voltage cable.

Description

Technical Field

[0001] The utility model relates to a monitoring device for the operating state of a high - voltage cable grounding wire. Background Art

[0002] As an important part of the power transmission system, the stable and safe operation of high - voltage power cables is very important. The sheath current is an important parameter reflecting the operating condition of high - voltage cables. Therefore, online monitoring of the sheath current can be used to monitor the operating state of high - voltage cables. However, in the prior art, a sheath current monitoring device is only set on the direct - grounding side of high - voltage cables, which has the following disadvantages: when the high - voltage cable is unloaded, the sheath current is basically zero; when the grounding device on the direct - grounding side fails, the sheath current is also zero. Therefore, the existing implementation schemes cannot accurately and reliably monitor the operating condition of high - voltage cables. In addition, in the existing implementation schemes, a switching device is not set on the direct - grounding side. In this way, when the original direct - grounding device fails, the direct - grounding side loses its grounding function. Summary of the Invention

[0003] The purpose of the utility model is to provide a monitoring device for the operating state of a high - voltage cable grounding wire, which can improve the accuracy and reliability of monitoring the operating condition of high - voltage cables and enhance the operating safety of high - voltage cables.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a monitoring device for the operating state of a high - voltage cable grounding wire, in which a direct - grounding - side monitoring device and a switching device are installed on the direct - grounding side of the high - voltage cable, and a protection - grounding - side monitoring device is installed on the protection - grounding side of the high - voltage cable.

[0005] Further, the direct grounding wire of the high - voltage cable is grounded. The direct - grounding - side monitoring device is provided with a first current sensor, and the first current sensor is installed on the cable sheath of the direct grounding wire to real - time monitor the magnitude and change of the sheath current on the direct grounding wire. The first current sensor is connected to the main body of the direct - grounding - side monitoring device to transmit the collected current signal to the main body of the direct - grounding - side monitoring device for processing.

[0006] Further, the switching device is connected to the direct grounding wire.

[0007] Further, the switching device is grounded.

[0008] Further, the protective grounding wire of the high-voltage cable is grounded through a protector. The protective grounding side monitoring device is provided with a second current sensor, which is installed on the cable sheath of the protective grounding wire to monitor the magnitude and change of the sheath current on the protective grounding wire in real time. The second current sensor is connected to the main body of the protective grounding side monitoring device to transmit the collected current signal to the main body of the protective grounding side monitoring device for processing.

[0009] Further, the first connection end of the protector is connected to the protective grounding wire, the second connection end of the protector is grounded, and the voltage signal input end of the protective grounding side monitoring device is connected to the protective grounding wire connected to the first connection end of the protector.

[0010] Further, the protective grounding side monitoring device is grounded.

[0011] Compared with the prior art, the present utility model has the following beneficial effects: The present utility model provides a monitoring device for the operating state of the grounding wire of a high-voltage cable. By installing a protective grounding side monitoring device on the protective grounding side of the high-voltage cable, this device can simultaneously monitor the sheath currents on both the direct grounding side and the protective grounding side, so that the change of the sheath current can be reliably monitored under different operating states of the high-voltage cable, improving the accuracy and reliability of the monitoring of the operating condition of the high-voltage cable. In addition, this device is also provided with a switching device on the direct grounding side, so that when a fault occurs in the direct grounding device, the grounding function of the direct grounding side can be restored, further improving the safety of the operation of the high-voltage cable. Description of the Drawings

[0012] Figure 1 is the circuit schematic diagram of the device in the embodiment of the present utility model. Detailed Embodiments

[0013] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0014] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0015] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] AsFigure 1 As shown in the figure, this embodiment provides a monitoring device for the operating state of the grounding wire of a high-voltage cable. A direct grounding side monitoring device and a switching device are installed on the direct grounding side of the high-voltage cable, and a protective grounding side monitoring device is installed on the protective grounding side of the high-voltage cable.

[0017] Specifically, the direct grounding wire of the high-voltage cable is grounded. The direct grounding side monitoring device is provided with a first current sensor, and the first current sensor is installed on the cable sheath of the direct grounding wire to monitor the magnitude and change of the sheath current on the direct grounding wire in real time. The first current sensor is connected to the main body of the direct grounding side monitoring device to transmit the collected current signal to the main body of the direct grounding side monitoring device for processing.

[0018] The protective grounding wire of the high-voltage cable is grounded through a protector. The protective grounding side monitoring device is provided with a second current sensor, and the second current sensor is installed on the cable sheath of the protective grounding wire to monitor the magnitude and change of the sheath current on the protective grounding wire in real time. The second current sensor is connected to the main body of the protective grounding side monitoring device to transmit the collected current signal to the main body of the protective grounding side monitoring device for processing.

[0019] The first connection end of the protector is connected to the protective grounding wire, the second connection end of the protector is grounded, and the voltage signal input end of the protective grounding side monitoring device is connected to the protective grounding wire connected to the first connection end of the protector. The protective grounding side monitoring device is grounded.

[0020] It can be seen that in this device, not only a direct grounding side monitoring device is set on the direct grounding side to obtain parameters such as current and pulse on the DC grounding side, but also a protective grounding side monitoring device is set on the protective grounding side, which can monitor parameters such as voltage, current, and pulse on both sides of the protector, thus realizing a more perfect monitoring device for the operating state of the grounding wire of the high-voltage cable and improving the accuracy and reliability of the monitoring of the operating condition of the high-voltage cable.

[0021] In this embodiment, a switching device is also set on the direct grounding side, and the switching device is connected to the direct grounding wire and grounded. In this way, after a fault occurs in the direct grounding device, the grounding function of the direct grounding side can be restored, further improving the safety of the operation of the high-voltage cable.

[0022] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A monitoring device for the operating state of a high-voltage cable grounding wire, characterized in that, A direct - grounding - side monitoring device and a switching device are installed on the direct - grounding side of the high - voltage cable, and a protection - grounding - side monitoring device is installed on the protection - grounding side of the high - voltage cable; The direct - grounding wire of the high - voltage cable is grounded. The direct - grounding - side monitoring device is provided with a first current sensor, and the first current sensor is installed on the cable sheath of the direct - grounding wire to real - time monitor the magnitude and change of the sheath current on the direct - grounding wire. The first current sensor is connected to the main body of the direct - grounding - side monitoring device to transmit the collected current signal to the main body of the direct - grounding - side monitoring device for processing; The switching device is connected to the direct - grounding wire; The switching device is grounded; The protection - grounding wire of the high - voltage cable is grounded through a protector. The protection - grounding - side monitoring device is provided with a second current sensor, and the second current sensor is installed on the cable sheath of the protection - grounding wire to real - time monitor the magnitude and change of the sheath current on the protection - grounding wire. The second current sensor is connected to the main body of the protection - grounding - side monitoring device to transmit the collected current signal to the main body of the protection - grounding - side monitoring device for processing. The first connection end of the protector is connected to the protection - grounding wire, the second connection end of the protector is grounded, and the voltage - signal input end of the protection - grounding - side monitoring device is connected to the protection - grounding wire connected to the first connection end of the protector; The protection - grounding - side monitoring device is grounded.

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