CN220820153U

CN220820153U - Online positioning device for partial discharge of high-voltage cable

Info

Publication number: CN220820153U
Application number: CN202322543782.0U
Authority: CN
Inventors: 刘大永; 史丽萍; 尹永良; 孙学熳; 贾平平
Original assignee: Hebei Software Institute; Baoding Donglang Electric Equipment Co ltd
Current assignee: Hebei Software Institute; Baoding Donglang Electric Equipment Co ltd
Priority date: 2023-09-19
Filing date: 2023-09-19
Publication date: 2024-04-19
Anticipated expiration: 2033-09-19

Abstract

The utility model discloses a high-voltage cable partial discharge on-line positioning device, which relates to the technical field of high-voltage cables and comprises a shell upper cover and a positioning shell arranged at the lower end of the shell upper cover, wherein a power module and an interface module are arranged in the positioning shell, the interface module and the power module are respectively arranged at two ends of the positioning shell, a logarithmic filter module is arranged at the upper ends of the interface module and the power module, a high-speed sampling module is arranged at the upper end of the logarithmic filter module, a network communication interface is arranged at the front end of the positioning shell, a signal input interface is arranged at the side end of the positioning shell, a communication interface, an indicator light and a power interface are sequentially arranged at one side of the signal input interface, and the power interface is connected with the power module. The utility model adopts the high-voltage cable partial discharge on-line positioning device with the structure, and the partial discharge position is determined by the high-speed sampling module and overhauled in time; and sending the fault signal to the system for processing through the setting of the communication interface.

Description

Online positioning device for partial discharge of high-voltage cable

Technical Field

The utility model relates to the technical field of high-voltage cables, in particular to an online positioning device for partial discharge of a high-voltage cable.

Background

In a power transmission and distribution grid system, a large number of cables are used as transmission lines. In the long-term operation of an actual system, the cable is subjected to insulation aging due to the influence of factors such as an electric field, a magnetic field, heat, light, moisture and the like, and the insulation performance can be obviously reduced.

High voltage cables are an important part of electrical equipment to ensure regional power transmission safety. Partial discharge is one of common faults of power equipment such as a power cable and the like, can cause insulation degradation of various power equipment, is a precursor of insulation faults, the partial discharge capacity of a high-voltage cable circuit is closely related to the insulation condition of the power cable, the change of the partial discharge capacity indicates that the cable insulation has the defect that the cable is possibly endangered to safe operation, and the current positioning method for the partial discharge of the power cable is quite many, wherein the main current positioning method is mainly comprising a single-ended method and a double-ended method, the former method is based on the fact that high-frequency current traveling waves generated when the partial discharge occurs propagate along the cable to two ends, refraction and reflection occur when different media are encountered, and the discharge position is determined by utilizing the time difference of the reflected waves; the latter uses the time difference of the two-end synchronous acquisition of the traveling wave transmission to the two ends to perform positioning.

Under different equipment operating voltages, a plurality of insulation defects and potential faults can not be found in time, and in the operating process after maintenance, the insulation defects and the potential faults can not be found in time, and insulation accidents can occur, so that huge economic losses are caused.

Disclosure of utility model

The utility model aims to provide a high-voltage cable partial discharge on-line positioning device which can detect and position a fault of a high-voltage cable in real time and avoid the occurrence of cable operation accidents.

In order to achieve the above purpose, the utility model provides a high-voltage cable partial discharge on-line positioning device, which comprises a shell upper cover and a positioning shell arranged at the lower end of the shell upper cover, wherein a power module and an interface module are arranged in the positioning shell, the interface module and the power module are respectively arranged at two ends of the positioning shell, a logarithmic filter module is arranged at the upper ends of the interface module and the power module, a high-speed sampling module is arranged at the upper ends of the logarithmic filter module, a network communication interface is arranged at the front end of the positioning shell, a signal input interface is arranged at the side end of the positioning shell, a communication interface, an indicator light and a power interface are sequentially arranged at one side of the signal input interface, and the power interface is connected with the power module.

Preferably, the number of the signal input interfaces is two.

Preferably, the network communication interface is fixed on the positioning shell through a bolt, and the bolt is diagonally arranged on the network communication interface.

Preferably, the network communication interface is arranged in a convex structure.

Preferably, the communication interface and the power interface are provided with protruding blocks.

Therefore, the high-voltage cable partial discharge on-line positioning device adopting the structure determines the partial discharge position through the high-speed sampling module, overhauls in time, avoids cable accidents, and sends fault signals to related systems for timely processing through the arrangement of the communication interface.

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic diagram of an embodiment of a high voltage cable partial discharge on-line positioning device according to the present utility model;

FIG. 2 is a side view of an embodiment of a high voltage cable partial discharge on-line positioning device of the present utility model;

FIG. 3 is a front view of an embodiment of a high voltage cable partial discharge on-line positioning device of the present utility model;

FIG. 4 is a cross-sectional view of a high voltage cable partial discharge on-line positioning device of the present utility model;

FIG. 5 is a longitudinal section of a high voltage cable partial discharge on-line positioning device of the present utility model;

Reference numerals

1. An upper cover of the housing; 2. positioning the shell; 3. a signal input interface; 4. an indicator light; 5. a communication interface; 6. a power interface; 7. a network communication interface; 8. a high-speed sampling module; 9. a logarithmic filtering module; 10. a power module; 11. and an interface module.

Detailed Description

The technical scheme of the utility model is further described below through the attached drawings and the embodiments.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Examples

Referring to fig. 1-5, the present utility model provides a high-voltage cable partial discharge on-line positioning device, including a housing upper cover 1 and a positioning housing 2 disposed at the lower end of the housing upper cover 1, the positioning housing 2 is disposed to protect the positioning device, a power module 10 and an interface module 11 are disposed inside the positioning housing 2, the interface module 11 and the power module 10 are disposed at two ends of the positioning housing 2, a logarithmic filter module 9 is disposed at the upper ends of the interface module 11 and the power module 10, the logarithmic filter module 9 processes digital signals collected by the high-speed sampling module 8, a high-speed sampling module 8 is disposed at the upper end of the logarithmic filter module 9, a network communication interface 7 is disposed at the front end of the positioning housing 2, the network communication interface 7 is connected with a system, so as to facilitate the transmission of the fault points detected by the positioning device to related staff for processing, a signal input interface 3 is disposed at the side end of the positioning housing 2, two signal input interfaces 3 are disposed, one side of the signal input interface 3 is sequentially provided with a communication interface 5, an indicator lamp and a power interface 6, and a power interface 6 are connected with the power module 10.

The network communication interface 7 is fixed on the positioning shell 2 through bolts, the bolts are diagonally arranged on the network communication interface 7, and the network communication interface 7 is arranged in a convex structure.

Protruding blocks are arranged in the communication interface 5 and the power interface 11.

When the device is specifically used, a power supply is connected through the power interface 6, a signal is connected through the signal input interface 3, external communication is connected through the communication interface 5 and the network communication interface 7, fault points are analyzed and determined through the high-speed sampling module 8 and the logarithmic filtering module 9 inside the positioning device, the positions of the fault points are sent to the system main station, and staff timely process the fault points.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and although the present utility model has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the utility model can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the utility model.

Claims

1. The utility model provides a high tension cable partial discharge on-line positioning device which characterized in that: including the shell upper cover and set up the location shell of shell upper cover lower extreme, the inside power module and the interface module of setting up of location shell, interface module with power module sets up respectively the both ends of location shell, interface module with power module's upper end is provided with logarithmic filter module, logarithmic filter module's upper end is provided with high-speed sampling module, location shell's front end is provided with the network communication interface, be provided with signal input interface on the side of location shell, one side of signal input interface has set gradually communication interface, pilot lamp and power interface, power interface with power module connects.

2. The high voltage cable partial discharge on-line positioning device according to claim 1, wherein: the number of the signal input interfaces is two.

3. The high voltage cable partial discharge on-line positioning device according to claim 2, wherein: the network communication interface is fixed on the positioning shell through bolts, and the bolts are diagonally arranged on the network communication interface.

4. A high voltage cable partial discharge on-line positioning device as claimed in claim 3, wherein: the network communication interface is arranged in a convex structure.

5. The high voltage cable partial discharge on-line positioning device as claimed in claim 4, wherein: and protruding blocks are arranged in the communication interface and the power interface.