CN213658861U

CN213658861U - Measuring device for online monitoring of lightning arrester

Info

Publication number: CN213658861U
Application number: CN202021964084.8U
Authority: CN
Inventors: 罗逍; 吴小江
Original assignee: Chongqing Tuofeng Electric Power Engineering Technology Co ltd
Current assignee: Chongqing Tuofeng Electric Power Engineering Technology Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-07-09
Anticipated expiration: 2030-09-10

Abstract

The utility model relates to a measuring device for be used for arrester on-line monitoring, including shell, rogowski coil and zero magnetic flow sensor set up in the shell, the shell includes first casing and second casing, and first casing and second casing are connected, and first casing has first joining in marriage the face, and the second casing has the second and joins in marriage the face, and first joining in marriage to connect the face has a recess, is equipped with sealing material in the recess, the second joins in marriage the face and has the clamp plate, and the clamp plate connects the face by the second and extends outward and form, the clamp plate inserts the recess and compresses tightly sealing material. The utility model discloses a non-contact's mode carries out the heavy current measurement of action current and leakage current's undercurrent data measurement to the state of arrester simultaneously, reduces the residual pressure of major loop through non-contact measurement, can avoid causing the incident of major loop to take place because of the trouble of monitor itself.

Description

Measuring device for online monitoring of lightning arrester

Technical Field

The utility model relates to an electric power arrester on-line monitoring field, in particular to a measuring device for arrester on-line monitoring.

Background

In order to ensure the safe operation of an electric power system, the zinc oxide arrester is one of important protection devices in the electric power system, and the main function of the zinc oxide arrester is to provide a proper current leakage channel for the main device when the main device is impacted by lightning overvoltage transmitted by a line or internal overvoltage caused by operation, so as to avoid faults such as tripping and the like caused by impact on the main device. The zinc oxide lightning arrester in operation reduces the insulation level of equipment due to the reasons of inlet water being affected with damp, internal valve plate aging and the like, and body explosion can be caused by defect faults, so that the safe operation of the whole transformer substation and even a power grid is endangered. Therefore, the method is a necessary measure for ensuring the normal operation of the zinc oxide arrester by regularly carrying out live detection on the zinc oxide arrester in operation, tracking and monitoring the degraded zinc oxide arrester in operation and monitoring the degradation development trend of the zinc oxide arrester. The lightning arrester is pre-tested by stopping the main equipment, sometimes the main equipment, especially high-voltage equipment, cannot be stopped due to the limitation of the operation mode, so that the lightning arrester cannot be tested on time, and therefore, the method for timely mastering the actual operation condition of the lightning arrester by adopting an electrified real-time online test means has very important significance.

The measuring device of the existing lightning arrester on-line monitoring device on the market generally adopts a contact type measuring mode that a structural mode of a zinc oxide valve plate is connected in series into a main power loop, so that the residual voltage after the energy of the main loop is released can be greatly improved, and safety accidents can be caused because the energy can not be released when the lightning arrester of the main loop acts due to the fault of the monitoring device; and also some products power the equipment itself by means of the energy obtained by the leakage current, which causes errors in the measurement data of the lightning arrester by the equipment itself.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve prior art's problem, provide one kind can measure the action current and leakage current, the action number of times isoparametric of arrester simultaneously through non-contact mode, the better measuring device who is used for arrester on-line monitoring of leakproofness.

The specific technical scheme is as follows: the utility model provides a measuring device for be used for arrester on-line monitoring, includes the shell, rogowski coil and zero magnetic flux sensor set up in the shell, the shell includes first casing and second casing, and first casing and second casing are connected, and first casing has first joining in marriage the face, and the second casing has the second and joins in marriage the face, and first joining in marriage the face and have a recess, is equipped with sealing material in the recess, the second joins in marriage the face and has the clamp plate, and the clamp plate is joined in marriage by the second and is extended formation to connect, the clamp plate inserts and compresses tightly sealing material in the recess.

Preferably, the first housing is provided with a recess, the second housing is provided with a protrusion, and the protrusion and the recess are arranged correspondingly.

Preferably, the corner of the first housing is provided with a mounting hole.

Preferably, the protrusion has a rib.

Preferably, the shell is internally provided with epoxy resin.

The technical effects of the utility model: the utility model discloses a measuring device for arrester on-line monitoring adopts non-contact's mode to carry out the heavy current measurement of action current and leakage current's undercurrent data measurement to the state of arrester simultaneously, reduces the residual pressure of major loop through non-contact measurement, can avoid causing the incident of major loop to take place because of the trouble of monitor itself.

Drawings

Fig. 1 is a schematic diagram of a measuring device for online monitoring of an arrester according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a housing according to an embodiment of the invention.

Fig. 3 is a schematic diagram of a first housing according to an embodiment of the present invention.

Fig. 4 is a partial schematic view of a first housing according to an embodiment of the invention.

Fig. 5 is a partial schematic view of a second housing according to an embodiment of the present invention.

Fig. 6 is a schematic view of a recessed portion according to an embodiment of the present invention.

Detailed Description

The essential features and advantages of the invention will be further explained below with reference to examples, but the invention is not limited to the embodiments listed.

As shown in fig. 1 to 6, a measuring device for online monitoring of a lightning arrester of the present embodiment includes a housing 1, a rogowski coil 2 and a zero magnetic flux sensor 3, and the rogowski coil 2 and the zero magnetic flux sensor 3 are disposed in the housing 1. The housing 1 includes a first housing 11 and a second housing 12, the first housing 11 is connected to the second housing 12, the first housing 11 has a first mating surface 111, the second housing 12 has a second mating surface 121, the first mating surface 111 has a groove 13, and the groove 13 is provided with a sealing material 4. The second mating surface 121 has a pressing plate 5, the pressing plate 5 is formed by extending the second mating surface 121, and the pressing plate 5 is inserted into the groove 13 to press the sealing material 4. In the technical scheme, the Rogowski coil 2 and the zero magnetic flux sensor 3 are integrated, so that parameters such as the action current, the leakage current and the action times of the lightning arrester can be measured simultaneously in a non-contact mode. The residual voltage of the main loop cannot be improved, the safety of the main loop cannot be influenced, the energy is not serially connected into the main loop to obtain energy, and the accuracy of measured parameter data cannot be influenced. By providing the first housing 11 and the second housing 12 for assembly, the housing assembly can be facilitated. By arranging the groove and the pressing plate, the pressing plate 5 can be inserted into the groove 13 after assembly and compresses the sealing material 4, and the sealing performance is improved. In this embodiment, the sealing material is a sealing rubber strip, the rogowski coil and the zero-flux sensor are mounted and integrated together through the shell of the measuring device, and then the coil is sealed by using epoxy resin, so that the influence on the measurement precision of the coil caused by humidity is prevented.

In this embodiment, the first housing 11 is provided with a recess 113, the second housing 12 is provided with a protrusion 122, and the protrusion 122 is disposed corresponding to the recess 113. Through the technical scheme, the first shell 11 can be hollowed out in the concave part, so that the installation and the overhaul are convenient.

In this embodiment, the corner of the first housing 11 is provided with a mounting hole 114, so that a screw can be locked in the mounting hole after passing through the through hole 123 of the second housing 12.

In this embodiment, the protrusion 122 has a reinforcing rib 6, so as to enhance the structural strength of the protrusion 122 and reduce the risk of damage caused by collision.

The measuring device for the online monitoring of the lightning arrester of the embodiment adopts a non-contact mode (the measuring device is not connected in series with the main loop) to simultaneously measure the large current of the action current and the small current data of the leakage current of the state of the lightning arrester, reduces the residual voltage of the main loop through the non-contact measurement, and can avoid the occurrence of safety accidents of the main loop caused by the faults of the monitor.

It should be noted that the above-mentioned preferred embodiments are only for illustrating the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a measuring device for lightning arrester on-line monitoring, its characterized in that includes the shell, rogowski coil and zero magnetic flux sensor set up in the shell, the shell includes first casing and second casing, and first casing and second casing are connected, and first casing has first joining face, and the second casing has the second joining face, and first joining face has the recess, is equipped with sealing material in the recess, the second joining face has the clamp plate, and the clamp plate is connected the outside formation of face by the second, the clamp plate inserts the recess and compresses tightly sealing material.

2. The measuring device for the online monitoring of the lightning arrester as claimed in claim 1, wherein the first housing is provided with a recess, and the second housing is provided with a protrusion, the protrusion being disposed corresponding to the recess.

3. The measuring device for the online monitoring of the lightning arrester as claimed in claim 2, wherein a corner of the first housing is provided with a mounting hole.

4. The measuring device for the online monitoring of the lightning arrester as claimed in claim 3, wherein the protrusion has a reinforcing rib.

5. The measuring device for the online monitoring of the lightning arrester as claimed in claim 4, characterized in that epoxy resin is arranged in the outer shell.