CN202075376U - GIS (gas-insulated switchgear) partial discharge monitoring device - Google Patents

Abstract

The utility model provides a GIS (gas-insulated switchgear) partial discharge monitoring device which comprises a sensing unit, a transmission unit, an information acquisition unit and a detection unit, wherein the sensing unit is arranged on the outer or inner surface of a GIS casing, the transmission unit is connected with the sensing unit, the information acquisition unit is connected with the transmission unit, the detection unit is connected with the information acquisition unit, the sensing unit is coupled with the ultrahigh frequency electromagnetic radiation signal generated by the GIS partial discharge, and the amplification, rectification and electro-optic conversion operations are performed to process the coupled ultrahigh frequency electromagnetic radiation signal into the optical signal, the transmission unit is used for transmitting the optical signal to the information acquisition unit, the information acquisition unit is used for receiving the optical signal transmitted by the transmission unit, the photoelectric conversion and optical communication operations are performed to process the optical signal into the optical communication signal, and the detection unit is used for detecting and analyzing the GIS partial discharge situation according to the optical communication signal. By adopting the GIS partial discharge monitoring device, the strong transient electromagnetic interference generated in the GIS operation process can be effectively reduced, and therefore the GIS partial discharge can be accurately monitored.

Description

GIS partial discharge monitoring device

Technical field

The utility model relates to power equipment on-line monitoring technique field, particularly, relates to a kind of GIS partial discharge monitoring device.

Background technology

GIS (gas insulated substation, gas-insulating and fully-enclosed combined electrical apparatus) has higher safe reliability, but multiple reasons such as processing, transportation, assembled in situ make GIS have insulation defect inevitably, and then influence its long term reliability.These defectives are more small and hidden usually, be not enough to cause GIS when power frequency withstand test, to puncture immediately, but such GIS is after putting into operation, shelf depreciation can take place under normal working voltage effect, make defective develop expansion gradually, even cause whole insulation breakdown or edge flashing, thereby the safe operation of equipment is threatened.The GIS partial discharge monitoring can in time be found the insulation defect of GIS, avoids insulation fault, improves the safety operation level of GIS.

The GIS partial discharge monitoring is under the GIS running status, utilize monitoring device to measure the inner contingent shelf depreciation of GIS continuously or periodically automatically, usually the monitoring system fixed installation at the scene, long-term on-line operation, need not artificial participation, can finish functions such as detection, storage, communication and diagnosis automatically.

The shelf depreciation process can produce wide band electromagnetic radiation, because GIS device structure characteristics generally adopt internal or external type superfrequency sensor (0.3-3GHz) that shelf depreciation is monitored at present.Because GIS equipment is huge, need to arrange that a large amount of superfrequency sensors could guarantee GIS inside latency defective is effectively monitored.But because there is serious electromagnetic interference (EMI) in the electric power scene, especially when GIS internal switch equipment is operated, will produce various transient overvoltages, distributed sensor can be subjected to power frequency circulation and all kinds of high frequency interference in the GIS on-line monitoring.How realizing the sensitivity monitoring of GIS shelf depreciation, how effectively to suppress electromagnetic interference (EMI) simultaneously, is the key of partial discharge monitoring.

The utility model content

The fundamental purpose of the utility model embodiment is to provide a kind of GIS partial discharge monitoring device, to solve the problem that distributed sensor in the GIS on-line monitoring of the prior art can be subjected to power frequency circulation and all kinds of high frequency interference.

To achieve these goals, the utility model embodiment provides a kind of GIS partial discharge monitoring device, this device comprises: sensing unit, transmission unit, information acquisition unit, and detecting unit, wherein, described sensing unit is arranged at the outside surface or the inside surface of GIS housing, described transmission unit is connected with described sensing unit, described information acquisition unit is connected with described transmission unit, described detecting unit is connected with described information acquisition unit, the described sensing unit superfrequency ELECTROMAGNETIC RADIATION SIGNATURE that described GIS shelf depreciation produces that is coupled, and the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE of described coupling amplified, detection, become light signal with the electric light conversion process, described transmission unit transmits described light signal to described information acquisition unit, described information acquisition unit receives the light signal that described transmission unit sends, and described light signal carried out opto-electronic conversion, optical communication is processed into communicate optical signal, and described detecting unit is according to the described GIS shelf depreciation of described communicate optical signal check and analysis situation.

Above-mentioned sensing unit comprises: coupling module, the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE that the described GIS shelf depreciation that is used to be coupled produces; The signal amplification module is connected with described coupling module, is used for described superfrequency ELECTROMAGNETIC RADIATION SIGNATURE is carried out processing and amplifying; The detection module is connected with described signal amplification module, is used for handling carrying out detection through the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE of processing and amplifying; Electric light conversion process module is connected with described detection module, is used for that the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE of handling through detection is carried out the electric light conversion process and becomes light signal.

Above-mentioned information acquisition unit comprises: the opto-electronic conversion processing module is used for that the light signal that receives is carried out opto-electronic conversion and handles; The optical communication processing module is connected with described opto-electronic conversion processing module, is used for that the signal of handling through opto-electronic conversion is carried out optical communication and handles.

Preferably, above-mentioned information acquisition unit also comprises: power module, and be used to produce energy type electric energy and send described energy type electric energy to described sensing unit through described transmission unit, think described sensing unit power supply.

Preferably, above-mentioned power module is a semiconductor laser.

Preferably, described sensing unit ground connection.

Preferably, described transmission unit is an optical fiber.

By means of technique scheme, isolate by the photoelectricity between sensing unit and the information acquisition unit, effectively reducing the strong Transient Electromagnetic that produces in the GIS operating process disturbs, can overcome that distributed sensor can be subjected to the problem of power frequency circulation and all kinds of high frequency interference in the GIS on-line monitoring of the prior art, and then can monitor the GIS shelf depreciation exactly.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structured flowchart according to the GIS partial discharge monitoring device of the utility model embodiment;

Fig. 2 is the structured flowchart according to thesensing unit 1 of the utility model embodiment;

Fig. 3 is the structured flowchart according to theinformation acquisition unit 3 of the utility model embodiment;

Fig. 4 is another structured flowchart according to theinformation acquisition unit 3 of the utility model embodiment;

Fig. 5 is the detailed structure view according to the GIS partial discharge monitoring device of the utility model embodiment;

Fig. 6 is the detailed block diagram according to the sensing unit 52 of the utility model embodiment;

Fig. 7 is the detailed block diagram according to the collecting unit 53 of the utility model embodiment.

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

The utility model embodiment provides a kind of GIS partial discharge monitoring device.Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is the structured flowchart according to the GIS partial discharge monitoring device of the utility model embodiment, as shown in Figure 1, this device comprises:sensing unit 1,transmission unit 2,information acquisition unit 3, and detectingunit 4, wherein, sensing unit is arranged at the outside surface or the inside surface of GIS housing, transmission unit is connected with sensing unit, information acquisition unit is connected with transmission unit, detecting unit is connected with information acquisition unit, the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE that sensing unit coupling GIS shelf depreciation produces, and to the coupling the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE amplify, detection, become light signal with the electric light conversion process, transmission unit transmits light signal to information acquisition unit, information acquisition unit receives the light signal that transmission unit sends, and light signal carried out opto-electronic conversion, optical communication is processed into communicate optical signal, and detecting unit is according to communicate optical signal check and analysis GIS shelf depreciation situation.

Isolate by the photoelectricity between sensing unit and the information acquisition unit, effectively reducing the strong Transient Electromagnetic that produces in the GIS operating process disturbs, overcome that distributed sensor can be subjected to the problem of power frequency circulation and all kinds of high frequency interference in the GIS on-line monitoring of the prior art, and then can monitor the GIS shelf depreciation exactly.

Preferably, sensing unit reliable ground on the GIS housing; Transmission unit can be optical fiber.

Particularly, as shown in Figure 2, above-mentionedsensing unit 1 comprises:

Coupling module 11, the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE that the GIS shelf depreciation that is used to be coupled produces;

Signal amplification module 12 is connected with coupling module, is used for the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE is carried out processing and amplifying;

Detection module 13 is connected with the signal amplification module, is used for handling carrying out detection through the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE of processing and amplifying;

Electric lightconversion process module 14 is connected with the detection module, is used for that the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE of handling through detection is carried out the electric light conversion process and becomes light signal.

As shown in Figure 3,information acquisition unit 3 specifically comprises:

Opto-electronicconversion processing module 31 is used for that the light signal that receives is carried out opto-electronic conversion and handles;

Opticalcommunication processing module 32 is connected with the opto-electronic conversion processing module, is used for that the signal of handling through opto-electronic conversion is carried out optical communication and handles.

Preferably, as shown in Figure 4,information acquisition unit 3 also comprises:power module 33, and be used to produce energy type electric energy and send energy type electric energy to sensing unit through transmission unit, think the sensing unit power supply.Thispower module 33 can be a semiconductor laser.

Fig. 5 is the detailed structure view according to the GIS partial discharge monitoring device of the utility model embodiment, as shown in Figure 5, sensing unit 52 is arranged atGIS 51 outside, sensing unit 52 also can be arranged on the GIS enclosure interior in the specific implementation, sensing unit 52 and collecting unit 53 are connected by optical fiber, collecting unit 53 is sent tocommunication unit 54 with the signal that collects,communication unit 54 is connected with diagnostic analysis unit 55, the signal diagnostic analysis GIS shelf depreciation situation that diagnostic analysis unit 55 sends according tocommunication unit 54.

Fig. 6 is the detailed block diagram of sensing unit 52, as shown in Figure 6, this sensing unit comprises: coupling unit, amplifying unit, detection unit, electro-optical signal converting unit and photoelectric cell, wherein, photoelectric cell is coupling unit, amplifying unit, detection unit, electro-optical signal converting unit raising electric energy.Fig. 7 is the detailed block diagram of collecting unit 53, as shown in Figure 7, this collecting unit comprises: photosignal converting unit, data acquisition unit, signal processing unit, optical communication element and semiconductor laser, wherein, semiconductor laser provides electric energy for sensing unit.The principle of work of this GIS partial discharge monitoring device is described below in conjunction with Fig. 6, Fig. 7:

The superfrequency ELECTROMAGNETIC RADIATION SIGNATURE that the shelf depreciation of GIS inside produces is coupled to the sensing unit of arranging on the GIS housing, sensing unit amplifies, after the conversion of detection, electro-optical signal, transmits signals to collecting unit through signal optical fibre again the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE that is coupled to; The power supply of sensing unit adopts the photoelectric cell technology, through optical fiber the energy type light source is sent to the photoelectric cell of sensing unit by the semiconductor laser in the collecting unit, realizes transform light energy, guarantees the steady operation of sensing unit; Sensing unit is reliable ground on the GIS housing; Collecting unit is behind the signal that receives from sensing unit, signal is carried out photosignal conversion, collection, processing, optical communication processing back generation communicate optical signal, be sent to communication unit, and by communication unit signal be sent to the diagnostic analysis unit and diagnose and analyze GIS shelf depreciation situation.

As seen from the above description, by adopting fiber-optic signal transmission and laser powered sensor mode between sensor on the GIS housing and collecting unit, realized the full Fibre Optical Sensor of partial discharge monitoring, eliminated the influence of transient interference such as VFTO that the GIS operating process produces and transient state earth potential rising, thereby improve the sensitivity and the reliability of GIS partial discharge monitoring system, realize accurate measurement the GIS local discharge signal.

In sum, by being set, internal or external type superfrequency current sensor is used for measuring and transmitting the Partial Discharge Detection signal on the GIS housing, and what sensor adopted is the Laser Power Devices power supply that is provided by collecting unit, thereby guaranteed the electrical isolation between sensor electric power system and the single unit system electric power system, guaranteed the photoelectricity isolation between sensing unit and the collecting unit, and the utility model does not change the GIS structure, easy for installation, the sensing sensitivity, anti-electromagnetic interference capability is strong, is applicable to the GIS partial discharge monitoring.

Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is a specific embodiment of the utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (7)

1. gas-insulating and fully-enclosed combined electrical apparatus GIS partial discharge monitoring device is characterized in that described device comprises: sensing unit, transmission unit, information acquisition unit and detecting unit, wherein,

Described sensing unit is arranged at the outside surface or the inside surface of GIS housing, and described transmission unit is connected with described sensing unit, and described information acquisition unit is connected with described transmission unit, and described detecting unit is connected with described information acquisition unit,

The described sensing unit superfrequency ELECTROMAGNETIC RADIATION SIGNATURE that described GIS shelf depreciation produces that is coupled, and to the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE of described coupling amplify, detection becomes light signal with the electric light conversion process, described transmission unit transmits described light signal to described information acquisition unit, described information acquisition unit receives the light signal that described transmission unit sends, and to described light signal carry out opto-electronic conversion, optical communication is processed into communicate optical signal, described detecting unit is according to the described GIS shelf depreciation of described communicate optical signal check and analysis situation.

2. device according to claim 1 is characterized in that, described sensing unit comprises:

Coupling module, the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE that the described GIS shelf depreciation that is used to be coupled produces;

The signal amplification module is connected with described coupling module, is used for described superfrequency ELECTROMAGNETIC RADIATION SIGNATURE is carried out processing and amplifying;

The detection module is connected with described signal amplification module, is used for handling carrying out detection through the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE of processing and amplifying;

Electric light conversion process module is connected with described detection module, is used for that the superfrequency ELECTROMAGNETIC RADIATION SIGNATURE of handling through detection is carried out the electric light conversion process and becomes light signal.

3. device according to claim 1 is characterized in that, described information acquisition unit comprises:

The opto-electronic conversion processing module is used for that the light signal that receives is carried out opto-electronic conversion and handles;

The optical communication processing module is connected with described opto-electronic conversion processing module, is used for that the signal of handling through opto-electronic conversion is carried out optical communication and handles.

4. device according to claim 1 is characterized in that, described information acquisition unit also comprises:

Power module is used to produce energy type electric energy and sends described energy type electric energy to described sensing unit through described transmission unit, thinks described sensing unit power supply.

5. device according to claim 4 is characterized in that, described power module is a semiconductor laser.

6. device according to claim 1 is characterized in that, described sensing unit ground connection.

7. device according to claim 1 is characterized in that, described transmission unit is an optical fiber.

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