CN103364695A - Local discharging on-line monitoring device of high-voltage cable - Google Patents
Local discharging on-line monitoring device of high-voltage cable Download PDFInfo
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- CN103364695A CN103364695A CN2013102596043A CN201310259604A CN103364695A CN 103364695 A CN103364695 A CN 103364695A CN 2013102596043 A CN2013102596043 A CN 2013102596043A CN 201310259604 A CN201310259604 A CN 201310259604A CN 103364695 A CN103364695 A CN 103364695A
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Abstract
The invention provides a local discharging on-line monitoring device of a high-voltage cable, which comprises a sensor for collecting the discharging signal of the high-voltage cable, a monitoring terminal connected with the sensor, an internet switch connected with the monitoring terminal, and a discharging monitoring concentrator connected with the internet switch, wherein the sensor is sleeved on a cable grounding line or a crossed interconnected line of the high-voltage cable; the sensor and the monitoring terminal are connected by a coaxial cable; the monitoring terminal, the internet switch and the discharging concentrator are connected by optical fibers; the local discharging on-line monitoring device of the high-voltage cable detects the local discharging signal of the high-voltage cable by the sensor in a on-line mode, and transmits the detected local discharging signal to the monitoring terminal; the monitoring terminal performs preprocessing on the local discharging signal sent from the sensor; and the discharging monitoring concentrator analyzes the local discharging signals collected by the internet switch to obtain the local discharging information of the high-voltage cable, thus realizing the real-time on-line control on the local discharging of the high-voltage cable.
Description
Technical field
The present invention relates to a kind of high-tension cable pick-up unit, particularly relate to a kind of high-tension cable local discharge on-line monitoring device.
Background technology
Along with the development of electrical network and the needs of urban network reconstruction, the use amount of China's power cable line rises just year by year.Wherein to have manufacturing process simple for cross-inked polyethylene power cable, electric property and heat resistance are all fine, transmission capacity is larger, structure is light, is easy to bending, and attachment tab is simple, mounting and installation is convenient, be not subjected to the restriction of height fall, do not have leakage of oil and cause the advantages such as danger of fire, so cross-inked polyethylene power cable is subject to the user and extensively welcomes.In the urban distribution network on the ground such as each big city of China such as Beijing, Shanghai, Tianjin, Guangzhou, HV XLPE Power Cable has obtained a wide range of applications, and the amount of laying cumulative year after year.Practical experience shows that cable line fault is to cause power grid accident, causes the major reason of heavy economic losses.Therefore, accurately, in time grasp the running status of cable line, to reasonable handling failure hidden danger, ensure that power grid operation has great importance.
Mainly be to carry out partial discharge monitoring for the cable in HV cable accessories and the peripheral limited range thereof to the high-tension cable device and method that detects that breaks down at present, can't accomplish the whole piece cable is monitored.
Some online testing product needs the relevant speciality personnel by means of the detecting instrument of outside, such as equipment such as oscillograph, spectrum analyzers, carry out at the scene observation analysis, maybe the data retrieval laboratory that gathers is done further to analyze, just can draw the relevant details of Partial Discharge Detection, the long-term on-line real time monitoring of so inconvenient high-tension cable.
Summary of the invention
Based on this, be necessary to provide a kind of high-tension cable local discharge on-line monitoring device, the shelf depreciation situation of the on-line monitoring high-tension cable that it can be real-time.
A kind of high-tension cable local discharge on-line monitoring device, the sensor that comprises the discharge signal that is used for gathering high-tension cable on the cable grounding line that is socketed in high-tension cable or the cross interconnected line, link to each other with sensor and the signal that sensor detects is carried out pretreated monitoring terminal, the signal that the network switch that the data that monitoring terminal is transmitted of linking to each other with monitoring terminal are transmitted and link to each other with the network switch transmits the network switch carries out the discharge monitoring concentrator of analyzing and processing, link to each other described monitoring terminal by concentric cable between described sensor and the monitoring terminal, link to each other by optical fiber between the network switch and the discharge monitoring concentrator.
Therein among embodiment, described high-tension cable local discharge on-line monitoring device comprises a plurality of monitoring terminals that mutually are cascaded, each monitoring terminal links to each other with the described network switch with the corresponding connection of at least one sensor, one of them monitoring terminal in a plurality of monitoring terminals that mutually are cascaded.
Among embodiment, described monitoring terminal comprises a plurality of network communication interfaces therein, and a plurality of monitoring terminals are cascaded by described network communication interface.
Among embodiment, after processing as one group of data analysis, the data that described discharge monitoring concentrator transmits any two adjacent monitoring terminals unify again to process therein.
Therein among embodiment, each monitoring terminal and one group of corresponding connection of sensor, each group sensor comprises three sensors, described three sensors are the phase high-tension cable in the three-phase high-voltage cable of same position on the Monitoring High Voltage Cable respectively.
Among embodiment, the sensor of respectively organizing of described high-tension cable local discharge on-line monitoring device is equidistant arrangement in Voltage Cable Lines Construction therein.
Among embodiment, described sensor is electromagnetic sensor therein.
Among embodiment, described sensor is the Split type current transformer therein.
The memory module that the data that therein among embodiment, described discharge monitoring concentrator comprises processing module that data analysis that the network switch is transmitted processes, transmit the network switch are stored and the display module that the analysis processing result of processing module is shown.
Among embodiment, described display module is liquid crystal display therein.
Above-mentioned high-tension cable local discharge on-line monitoring device detects online the local discharge signal of high-tension cable and the local discharge signal that detects is delivered to monitoring terminal by sensor, monitoring terminal carries out pre-service to the local discharge signal that sensor transmits, thereby the local discharge signal that discharge monitoring concentrator compiles the network switch carries out analyzing and processing and obtains the information whether high-tension cable shelf depreciation occurs, thereby realizes the real time on-line monitoring to the high-tension cable shelf depreciation.
Description of drawings
Fig. 1 is the high-tension cable local discharge on-line monitoring device synoptic diagram of an embodiment;
Fig. 2 is high-tension cable local discharge on-line monitoring device shown in Figure 1 synoptic diagram when being applied to three-phase electricity.
Embodiment
Please refer to Fig. 1, an embodiment provides a kind of high-tension cable local discharge on-line monitoring device.Following two monitoring terminals, 120 corresponding sensors 110 and high-tension cable 200 do not draw among the figure.This high-tension cable local discharge on-line monitoring device comprises the sensor 110 of the discharge signal that is used for gathering high-tension cable 200 on the cable grounding line that is socketed in high-tension cable 200 or the cross interconnected line, link to each other with sensor 110 and the signal that sensor 110 detects is carried out pretreated monitoring terminal 120, the signal that the network switch 140 that the data that monitoring terminal 120 is transmitted of linking to each other with monitoring terminal 120 are transmitted and link to each other with the network switch 140 transmits the network switch 140 carries out the discharge monitoring concentrator 150 of analyzing and processing.Link to each other by concentric cable between sensor 110 and the monitoring terminal 120, link to each other by optical fiber 130 between monitoring terminal 120, the network switch 140 and the discharge monitoring concentrator 150.
Wherein, only drawn the very short part of high-tension cable 200 among Fig. 1, sensor 110 has also only drawn two.High-tension cable 200 can be cross-inked polyethylene power cable.The quantity of sensor 110 herein determines according to length and the actual use needs of high-tension cable 200.Sensor 110 mainly is the discharge scenario that detects online high-tension cable 200.These sensors are equidistant arrangement at the circuit of high-tension cable 200.Sensor 110 herein is electromagnetic sensor, is the Split type current transformer more specifically.Because sensor 110 be electromagnetic sensor, so the operation of 110 pairs of high-tension cables of sensor exerts an influence hardly, can be implemented in the line detection.
The monitoring terminal 120 of this high-tension cable local discharge on-line monitoring device comprises the analog filtering amplifying circuit, based on FPGA(Field-Programmable Gate Array, i.e. field programmable gate array) high-capacity and high-speed data acquisition circuit, high speed processor and network communication interface.The filter amplification circuit of monitoring terminal 120, be to finish the pre-service such as the simulation amplification of local discharge signal, filtering noise reduction, high-speed data sampling, Partial discharge signal reconstruct based on the high-capacity and high-speed data acquisition circuit of FPGA and the major function of high speed processor.In addition, monitoring terminal 120 can also carry out the data in certain time limit to the Partial Discharge Data behind the collection analysis and preserve, and can carry out communication with discharge monitoring concentrator 150 by active or passive mode, and data upload to the monitoring concentrator 150 that discharges is for further processing.
The network switch 140 is the bridges that carry out data transmission between monitoring terminal 120 and the discharge monitoring concentrator 150.The network switch 140 can be realized carrying out data transmission between a plurality of monitoring terminals 120 and the discharge monitoring concentrator 150 simultaneously.Discharge monitoring concentrator 150 also can be controlled a plurality of monitoring terminals 120 simultaneously by the network switch 140.
The display module that discharge monitoring concentrator 150 comprises processing module that data analysis that the network switch 140 is transmitted processes, the network switch is passed memory module that 140 data store and the analysis processing result of processing module is shown.Display module herein is liquid crystal display.Thereby discharge monitoring concentrator 150 can be processed the information such as discharge capacity size, discharge position and electric discharge type that obtain high-tension cable 200 by the data analysis that the network switch 140 is transmitted, and can store the local discharge signal historical data of long term monitoring.Discharge monitoring concentrator 150 can be realized timing or continuously high-tension cable 200 be carried out Partial Discharge Detection by sensor 110, monitoring terminal 120 and the network switch 140, and not affect the running status of high-tension cable 200.Therefore, this high-tension cable local discharge on-line monitoring device can be realized the on-line PD monitoring to high-tension cable.
Linking to each other by optical fiber 130 between monitoring terminal 120, the network switch 140 and the discharge monitoring concentrator 150 can reduce disturbance and the higher sensitivity of acquisition.
Please refer to Fig. 2, this high-tension cable local discharge on-line monitoring device comprises a plurality of monitoring terminals that mutually are cascaded 120, each monitoring terminal 120 and at least one sensor 110 corresponding connection, one of them monitoring terminal 120 in a plurality of monitoring terminals that mutually are cascaded 120 links to each other with the network switch 140.Monitoring terminal 120 comprises a plurality of network communication interfaces, and a plurality of like this monitoring terminals 120 just can be cascaded by network communication interface.For example, the quantity of monitoring terminal 120 herein is four, is respectively the first monitoring terminal, the second monitoring terminal, the 3rd monitoring terminal and the 4th monitoring terminal.Wherein, the first monitoring terminal and the second monitoring terminal connect together by network communication interface, the second monitoring terminal and the 3rd monitoring terminal connect together by network communication interface, the 3rd monitoring terminal and the 4th monitoring terminal connect together by network communication interface, and the first monitoring terminal and the network switch 140 connect together by network communication interface.Each monitoring terminal 120 and one group of corresponding connection of sensor.Each group sensor comprises three sensors herein, the phase high-tension cable on these three sensors difference Monitoring High Voltage Cable 200 in the three-phase high-voltage cable of same position.Each is organized sensor and is equidistant arrangement in Voltage Cable Lines Construction.Like this, this high-tension cable local discharge on-line monitoring device can be realized the shelf depreciation situation of three-phase electricity is carried out real time on-line monitoring.
With respect to the mode that each monitoring terminal 120 all directly is connected with the network switch 140, adopt the mode that adopts successively series connection to be connected with the network switch 140 again monitoring terminal 120, can make things convenient for on-the-spot installation and the expansion in later stage, dirigibility is higher.This be because, during on-the-spot the installation, only need each monitoring terminal 120 is serially connected, and then be connected with the network switch 140 and get final product, need not each monitoring terminal 120 and go to be connected with the network switch connection; Later stage only needs the monitoring terminal 120 that a monitoring terminal 120 series connection of needs expansion advance to connect is got final product when expanding, and is very convenient.
After processing as one group of data analysis, the data that 150 pairs of any two adjacent monitoring terminals 120 of discharge monitoring concentrator of this high-tension cable local discharge on-line monitoring device transmit unify again to process.It mainly is to carry out filtering to process that the data that herein adjacent two monitoring terminals 120 transmitted are processed as one group of data analysis.To be further processed through overdischarge monitoring concentrator 150 again as one group of data through the data after the filtering processing, further processing mainly is to judge that group Data Detection has arrived shelf depreciation, so just can navigate to discharge position between corresponding adjacent two monitoring terminals 120 herein.And by local discharge signal analysis being obtained the information such as discharge capacity size, electric discharge type.Therefore, this high-tension cable local discharge on-line monitoring device can navigate to discharge position between two adjacent monitoring terminals 120.
This high-tension cable local discharge on-line monitoring device can be realized high-tension cable partial discharge monitoring and location.Adopt this high-tension cable local discharge on-line monitoring device can not have a power failure at high-tension cable, not under the running status of detachment system, high-tension cable is carried out insulation characterisitic detection fully automatic, continuous or regularly, whether be in normal operating condition for understanding and grasping monitored high-tension cable, whether need maintenance in order to determine this cable, maintenance investigation position, and how to keep in repair etc. useful information is provided.
This high-tension cable local discharge on-line monitoring device detects online the local discharge signal of high-tension cable and the local discharge signal that detects is delivered to monitoring terminal by sensor, monitoring terminal carries out pre-service to the local discharge signal that sensor transmits, thereby the local discharge signal that discharge monitoring concentrator compiles the network switch carries out analyzing and processing and obtains the information whether high-tension cable shelf depreciation occurs, thereby realizes the real time on-line monitoring to the high-tension cable shelf depreciation.This high-tension cable local discharge on-line monitoring device can be real-time the shelf depreciation situation of on-line monitoring high-tension cable.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. high-tension cable local discharge on-line monitoring device, it is characterized in that, the sensor that comprises the discharge signal that is used for gathering high-tension cable on the cable grounding line that is socketed in high-tension cable or the cross interconnected line, link to each other with sensor and the signal that sensor detects is carried out pretreated monitoring terminal, the signal that the network switch that the data that monitoring terminal is transmitted of linking to each other with monitoring terminal are transmitted and link to each other with the network switch transmits the network switch carries out the discharge monitoring concentrator of analyzing and processing, link to each other described monitoring terminal by concentric cable between described sensor and the monitoring terminal, link to each other by optical fiber between the network switch and the discharge monitoring concentrator.
2. high-tension cable local discharge on-line monitoring device according to claim 1, it is characterized in that, described high-tension cable local discharge on-line monitoring device comprises a plurality of monitoring terminals that mutually are cascaded, each monitoring terminal links to each other with the described network switch with the corresponding connection of at least one sensor, one of them monitoring terminal in a plurality of monitoring terminals that mutually are cascaded.
3. high-tension cable local discharge on-line monitoring device according to claim 2 is characterized in that, described monitoring terminal comprises a plurality of network communication interfaces, and a plurality of monitoring terminals are cascaded by described network communication interface.
4. high-tension cable local discharge on-line monitoring device according to claim 3 is characterized in that, unifies to process after the data that described discharge monitoring concentrator transmits any two adjacent monitoring terminals are processed as one group of data analysis again.
5. high-tension cable local discharge on-line monitoring device according to claim 4, it is characterized in that, each monitoring terminal and one group of corresponding connection of sensor, each group sensor comprises three sensors, the phase high-tension cable on described three sensors difference Monitoring High Voltage Cable in the three-phase high-voltage cable of same position.
6. high-tension cable local discharge on-line monitoring device according to claim 5 is characterized in that, the sensor of respectively organizing of described high-tension cable local discharge on-line monitoring device is equidistant arrangement in Voltage Cable Lines Construction.
7. high-tension cable local discharge on-line monitoring device according to claim 5 is characterized in that, described sensor is electromagnetic sensor.
8. high-tension cable local discharge on-line monitoring device according to claim 5 is characterized in that, described sensor is the Split type current transformer.
9. high-tension cable local discharge on-line monitoring device according to claim 4, it is characterized in that the memory module that the data that described discharge monitoring concentrator comprises processing module that data analysis that the network switch is transmitted processes, transmit the network switch are stored and the display module that the analysis processing result of processing module is shown.
10. high-tension cable local discharge on-line monitoring device according to claim 9 is characterized in that, described display module is liquid crystal display.
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| CN2013102596043A CN103364695A (en) | 2013-06-26 | 2013-06-26 | Local discharging on-line monitoring device of high-voltage cable |
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| CN2013102596043A CN103364695A (en) | 2013-06-26 | 2013-06-26 | Local discharging on-line monitoring device of high-voltage cable |
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Cited By (4)
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| CN105158657A (en) * | 2015-08-26 | 2015-12-16 | 芜湖市凯鑫避雷器有限责任公司 | High-voltage switch cabinet partial discharge online monitoring system |
| CN106093732A (en) * | 2016-07-28 | 2016-11-09 | 华北电力大学 | Optical fiber direction sensor for high voltage electric equipment Partial Discharge Detection |
| CN108872802A (en) * | 2017-05-12 | 2018-11-23 | 中国石油化工股份有限公司 | A kind of cable local discharge distributed monitoring system |
| CN109506711A (en) * | 2018-11-24 | 2019-03-22 | 四川都睿感控科技有限公司 | Leak current fault point detecting method in traction substation comprehensive monitor system and cable |
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Cited By (5)
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| CN105158657A (en) * | 2015-08-26 | 2015-12-16 | 芜湖市凯鑫避雷器有限责任公司 | High-voltage switch cabinet partial discharge online monitoring system |
| CN106093732A (en) * | 2016-07-28 | 2016-11-09 | 华北电力大学 | Optical fiber direction sensor for high voltage electric equipment Partial Discharge Detection |
| CN106093732B (en) * | 2016-07-28 | 2019-01-15 | 华北电力大学 | Optical fiber direction sensor for high voltage electric equipment Partial Discharge Detection |
| CN108872802A (en) * | 2017-05-12 | 2018-11-23 | 中国石油化工股份有限公司 | A kind of cable local discharge distributed monitoring system |
| CN109506711A (en) * | 2018-11-24 | 2019-03-22 | 四川都睿感控科技有限公司 | Leak current fault point detecting method in traction substation comprehensive monitor system and cable |
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