CN202563056U - Online monitoring system of partial discharge of MV and HV power cable - Google Patents
Online monitoring system of partial discharge of MV and HV power cable Download PDFInfo
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- CN202563056U CN202563056U CN 201220207509 CN201220207509U CN202563056U CN 202563056 U CN202563056 U CN 202563056U CN 201220207509 CN201220207509 CN 201220207509 CN 201220207509 U CN201220207509 U CN 201220207509U CN 202563056 U CN202563056 U CN 202563056U
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Abstract
The utility model provides an online monitoring system of partial discharge of MV and HV power cables. The online monitoring system of the partial discharge of the MV and HV power cables includes a sensor, an onsite detection unit, a server and a monitoring device. The sensor connects with a coaxial cable and the onsite detection unit. The onsite detection unit connects with the remote server through an optical fiber. The server connects with the monitoring device and a communication network. The online monitoring system of the partial discharge of the MV and HV power cables provided by the utility model has the following characteristics. First, the online monitoring system of the partial discharge of the MV and HV power cables is convenient for later maintenance and installing current sensor in a later stage. Second, the transmission band width is reduced, the data processing workload of the server is reduced, and the storage space of the server is saved. Third, the online monitoring system of the partial discharge of the MV and HV power cables can analyze the noise distribution condition of the surrounding to the power cables and has comparatively good filtering effect. Fourth, the online monitoring system of the partial discharge of the MV and HV power cables can make comprehensive judgment of that whether the partial discharge occurs, thereby improving the accuracy of alarm. Fifth, the continuous and flexible monitoring in a tracking manner of multiple station and multiple lines is realized, thereby enriching monitoring means. And the online monitoring system of the partial discharge of the MV and HV power cables can realize centralized monitoring and centralized management of the power cables.
Description
Technical field
The utility model relates to a kind of cable local discharge monitoring system, and specifically a kind of mesohigh power cable partial discharge monitoring system belongs to the electrical engineering technical field.
Background technology
The mesohigh power cable is the important component part of electric system; But; Power cable is in operational process; Because internal field's stress that the factors such as accumulation of space charge can cause under inner impurity, semiconductor layer convexity, the voltage effect is concentrated, and produces shelf depreciation, causes the safe operation of power cable to be affected.Therefore, through detecting the shelf depreciation of power cable, can judge the aging conditions of power cable effectively.
The Chinese patent publication number is that 2718593 patent discloses a kind of partial discharge monitoring device; The technical scheme that this device is taked is: the Luo-coil current transformer is installed on the three-phase ground wire of power cable; Office's discharge stream signal that will collect through Luo-coil is converted into the front end signal processing that differs 90 ° voltage signal and get into data acquisition system (DAS); The filtration fraction low-frequency noise; Get into the back end signal processing module simultaneously; The back is single to be to adopt packet+data address and get into data collecting card through the data after the rough handling, and the bleeder circuit of on-the-spot PT (Partial Discharge, shelf depreciation) is to get into data collecting card through the parallel channel after the low-voltage of 12V with the PT voltage transitions.Data before the data collecting card are monitored through the IO mouth; After flowing into and gather, at ordinary times data just flow out with the form of storehouse; Do not get into data collecting card and preserve, in case and data are put in IO interface discovery office, just data are put in feedback signal and the office that begins to store in the data collecting card.Get into pre-processing module after the data collecting card storage data; Through getting into the discharge signal analysis module after the simple process,, will judge whether discharge signal automatically through sparking voltage into office in this process; If surpass threshold voltage; Then send data to insulation trend module and the final long distance control system display waveform that gets into, manual work is carried out at this, sends alerting signal simultaneously; If do not surpass threshold value, the then automatic deleted data of system.It utilizes Computer Analysis to handle shelf depreciation, can analyze maximum pd quantity, average discharge capacity, discharge time, discharge phase, measure of skewness, steepness parameter, though the shelf depreciation situation that detects effectively,, also exist following some deficiency:
1) current transformer adopts Luo-coil, owing to need cable be passed from coil when installing, trouble is installed not only, and is not easy to overhaul with the later stage afterwards and installs current transformer additional, has restricted its scope of application.
2) single-chip microcomputer that adopts owing to harvester, not only complicated circuit, and arithmetic speed is slow, and does not possess expanded function.
3) owing to adopt high pass or low-pass filter to carry out Filtering Processing, its noise reduction is low.
The utility model content
For overcoming the deficiency that above-mentioned prior art exists; The utility model technical matters to be solved is to provide a kind of mesohigh power cable partial discharge monitoring system; It not only installs simple, easy to use, and have data acquisition precisely, computing is fast several times and the characteristics of excellent noise reduction effect.
The utility model solves the technical scheme that its technical matters takes: a kind of mesohigh power cable partial discharge monitoring system; It is characterized in that; Comprise sensor, on-site detecting unit, server and supervising device; Said sensor is connected with on-site detecting unit through concentric cable, and said on-site detecting unit is connected with long-range server through optical fiber, and said server is connected with supervising device through communication network.
Said sensor comprises HF current transformer and low-frequency current mutual inductor.
Said sensor comprises having central through hole shell body that installs cable and the magnetic conductor that is arranged in the shell body; Said shell body is fastened relatively by two housings and forms, and said housing adopts spray piano lacquer steel skeleton structure body; Said magnetic conductor is outer for to twine the semicircular structure body that hollow magnetic conduction carcasing forms by enameled wire.
Said two housing one ends connect through hinge, and the other end connects through fastener.
The signal acquisition module, analog-to-digital conversion module, data analysis module, data processing module and the ethernet switching module that are connected successively in said on-site detecting unit comprises casing and is arranged on casing.
Said server comprises Ethernet switch, system host, display module, keyboard load module and wireless communication module; Said system host is connected with wireless communication module with Ethernet switch, display module, keyboard load module respectively.
Said system host comprises data diagnosis analysis module, data trend analysis module, threshold values threshold values judge module, alarm module and DBM; Said data diagnosis analysis module is connected with DBM with data trend analysis module, threshold values judge module respectively, and said alarm module is connected with threshold values threshold values judge module.
Said communication network comprises GPRS wireless network and Intranet.
Said supervising device comprises special-purpose handheld terminal, pocket computer and smart mobile phone.
The principle of work of the utility model is following:
Adopt the current transformer of band low pass Hi-pass filter to gather the local discharge signal that occurs in the mesohigh power cable ground wire; And the current signal that collects is sent to on-site detecting unit through the double shielded coaxial cable of band flexible metal conduit shell; On-site detecting unit carries out digital-to-analog conversion, analysis and Filtering Processing respectively to the signal that obtains; And the data of rough handling are sent to server through optical fiber; Server carries out diagnostic analysis earlier to the data of each on-site detecting unit, carries out trend analysis and threshold values judgement according to the diagnostic analysis result again, and the trend analysis result is sent to the upper level management system; And report to the police according to threshold decision notice alarm module; Alarm module sends mail through in-house network or reports to the police to supervising devices such as handheld terminal, pocket computer and smart mobile phones with the form of note through wireless network, and simultaneously, server arrives DBM with data storage.The staff can sign in to server through supervising device according to authority, carries out this monitoring system is carried out operated from a distance, comprises the storage of data, send and revise, but the long-range data waveform of while real time inspection makes things convenient for the staff to safeguard.
The beneficial effect of the utility model is following:
1) adopt the plug-in sensor, not only easy for installation, and help overhauling with the later stage afterwards and install current transformer additional.
2) adopt on-site detecting unit, not only reduced transmission bandwidth, and reduced data in server work of treatment amount, saved the storage space of server with Data Management Analysis function.
3) through adopting special-purpose data processing module that signal is carried out the filtering noise reduction, not only can effectively analyze power cable ambient noise distribution situation, and have filter effect preferably for the noise that is in same frequency range with local discharge signal.
4) pattern of employing trend analysis, system can not send to the staff very first time after the data that similar shelf depreciation occurs occur; But begin to store automatically total data this moment; And observe tracking data for a long time, and comprehensively judge whether shelf depreciation, improved the accuracy of reporting to the police.
5) this system adopts distributed frame that power cable is carried out Partial Discharge Detection, not only realized multi continuously to multistation, follow the tracks of, monitoring flexibly, enriched monitoring means, and can unify monitoring power cable, manage concentratedly.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified:
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of the said sensor of the utility model;
Fig. 3 is the theory diagram of the said on-site detecting unit of the utility model;
Fig. 4 is the structured flowchart of the said server of the utility model;
Among the figure, 1 housing, 2 hinges, 3 fasteners.
Embodiment
As shown in Figure 1; A kind of mesohigh power cable partial discharge monitoring system of the utility model; Comprise sensor, on-site detecting unit, server and supervising device; Said sensor is connected with on-site detecting unit through concentric cable, and said on-site detecting unit is connected with the server that is positioned at remote control center through optical fiber, and said server is connected with supervising device through communication network.Wherein, said sensor comprises HF current transformer.
Said sensor comprises having central through hole shell body that installs cable and the magnetic conductor that is arranged in the shell body.As shown in Figure 2, said shell body is fastened relatively by two housings 1 and forms, and said two housing one ends connect through hinge 2, and the other end connects through fastener 3.Wherein, said housing adopts spray piano lacquer steel skeleton structure body; Said magnetic conductor is for to twine the semicircular structure body that hollow magnetic conduction carcasing forms by enameled wire.
The signal acquisition module, analog-to-digital conversion module, data analysis module, data processing module and the ethernet switching module that are connected successively in said on-site detecting unit comprises casing and is arranged on casing, as shown in Figure 3.
Said server comprises Ethernet switch, system host, display module, keyboard load module and wireless communication module; Said system host is connected with wireless communication module with Ethernet switch, display module, keyboard load module respectively, and is as shown in Figure 4.Wherein, said system host comprises data diagnosis analysis module, data trend analysis module, threshold values judge module, alarm module and DBM; Said data diagnosis analysis module is connected with DBM with data trend analysis module, threshold values threshold values judge module respectively, and said alarm module is connected with threshold values threshold values judge module.
Communication network comprises GPRS wireless network and Intranet described in this monitoring system.
Supervising device comprises special-purpose handheld terminal, pocket computer and smart mobile phone described in this monitoring system.
Except that the described technical characterictic of the foregoing description, be the known technology of those skilled in the art.
Claims (9)
1. mesohigh power cable partial discharge monitoring system; It is characterized in that; Comprise sensor, on-site detecting unit, server and supervising device; Said sensor is connected with on-site detecting unit through concentric cable, and said on-site detecting unit is connected with long-range server through optical fiber, and said server is connected with supervising device through communication network.
2. a kind of mesohigh power cable partial discharge monitoring according to claim 1 system is characterized in that said sensor comprises HF current transformer and low-frequency current mutual inductor.
3. a kind of mesohigh power cable partial discharge monitoring according to claim 1 system is characterized in that said sensor comprises having central through hole shell body that installs cable and the magnetic conductor that is arranged in the shell body; Said shell body is fastened relatively by two housings and forms, and said housing adopts spray piano lacquer steel skeleton structure body; Said magnetic conductor is for to twine the semicircular structure body that hollow magnetic conduction carcasing forms by enameled wire.
4. a kind of mesohigh power cable partial discharge monitoring according to claim 3 system is characterized in that said two housing one ends connect through hinge, and the other end connects through fastener.
5. a kind of mesohigh power cable partial discharge monitoring according to claim 1 system; It is characterized in that the signal acquisition module, analog-to-digital conversion module, data analysis module, data processing module and the ethernet switching module that are connected successively in said on-site detecting unit comprises casing and is arranged on casing.
6. a kind of mesohigh power cable partial discharge monitoring according to claim 1 system is characterized in that said server comprises Ethernet switch, system host, display module, keyboard load module and wireless communication module; Said system host is connected with wireless communication module with Ethernet switch, display module, keyboard load module respectively.
7. a kind of mesohigh power cable partial discharge monitoring according to claim 6 system is characterized in that said system host comprises data diagnosis analysis module, data trend analysis module, threshold values judge module, alarm module and DBM; Said data diagnosis analysis module is connected with DBM with data trend analysis module, threshold values threshold values judge module respectively, and said alarm module is connected with threshold values threshold values judge module.
8. a kind of mesohigh power cable partial discharge monitoring according to claim 1 system is characterized in that said communication network comprises GPRS wireless network and Intranet.
9. a kind of mesohigh power cable partial discharge monitoring according to claim 1 system is characterized in that said supervising device comprises special-purpose handheld terminal, pocket computer and smart mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220207509 CN202563056U (en) | 2012-05-10 | 2012-05-10 | Online monitoring system of partial discharge of MV and HV power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220207509 CN202563056U (en) | 2012-05-10 | 2012-05-10 | Online monitoring system of partial discharge of MV and HV power cable |
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| CN202563056U true CN202563056U (en) | 2012-11-28 |
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| CN 201220207509 Expired - Fee Related CN202563056U (en) | 2012-05-10 | 2012-05-10 | Online monitoring system of partial discharge of MV and HV power cable |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636736A (en) * | 2012-05-10 | 2012-08-15 | 山东电力集团公司济南供电公司 | Online monitoring system for partial discharge of middle-high voltage power cable |
| CN103399264A (en) * | 2013-07-30 | 2013-11-20 | 苏州光格设备有限公司 | Online monitoring and positioning system for local discharge of high-voltage cable |
| CN103412213A (en) * | 2013-07-25 | 2013-11-27 | 广西电网公司南宁供电局 | Crosslinked polyethylene high-voltage cable on-line monitoring and early warning system |
| CN106483434A (en) * | 2016-11-24 | 2017-03-08 | 南京朗坤自动化有限公司 | Power cable partial discharge monitoring device and its monitoring method |
| CN106771933A (en) * | 2017-01-23 | 2017-05-31 | 天津大学 | Power cable shelf depreciation high frequency electric monitoring system based on wireless network |
| CN107345993A (en) * | 2017-07-19 | 2017-11-14 | 河南职业技术学院 | A kind of electric equipment operation information monitoring system |
-
2012
- 2012-05-10 CN CN 201220207509 patent/CN202563056U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636736A (en) * | 2012-05-10 | 2012-08-15 | 山东电力集团公司济南供电公司 | Online monitoring system for partial discharge of middle-high voltage power cable |
| CN103412213A (en) * | 2013-07-25 | 2013-11-27 | 广西电网公司南宁供电局 | Crosslinked polyethylene high-voltage cable on-line monitoring and early warning system |
| CN103399264A (en) * | 2013-07-30 | 2013-11-20 | 苏州光格设备有限公司 | Online monitoring and positioning system for local discharge of high-voltage cable |
| CN103399264B (en) * | 2013-07-30 | 2016-04-20 | 苏州光格设备有限公司 | High-tension cable partial discharge monitoring and positioning system |
| CN106483434A (en) * | 2016-11-24 | 2017-03-08 | 南京朗坤自动化有限公司 | Power cable partial discharge monitoring device and its monitoring method |
| CN106771933A (en) * | 2017-01-23 | 2017-05-31 | 天津大学 | Power cable shelf depreciation high frequency electric monitoring system based on wireless network |
| CN107345993A (en) * | 2017-07-19 | 2017-11-14 | 河南职业技术学院 | A kind of electric equipment operation information monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121107 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121107 Address after: 250012 Shandong Province, Lixia District of Ji'nan City Luoyuan Street No. 238 Patentee after: Jinan Power Supply Co., Ltd. of Shandong Electric Power Corporation Patentee after: State Grid Corporation of China Address before: 250012 Shandong Province, Lixia District of Ji'nan City Luoyuan Street No. 238 Patentee before: Jinan Power Supply Co., Ltd. of Shandong Electric Power Corporation |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20160510 |
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| CF01 | Termination of patent right due to non-payment of annual fee |