CN103744006B - High voltage electric equipment inside loosens the shelf depreciation positioning diagnosticing method produced - Google Patents
High voltage electric equipment inside loosens the shelf depreciation positioning diagnosticing method produced Download PDFInfo
- Publication number
- CN103744006B CN103744006B CN201410005643.5A CN201410005643A CN103744006B CN 103744006 B CN103744006 B CN 103744006B CN 201410005643 A CN201410005643 A CN 201410005643A CN 103744006 B CN103744006 B CN 103744006B
- Authority
- CN
- China
- Prior art keywords
- shelf depreciation
- point
- signal
- high voltage
- electric equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention belongs to technical field of electricity, be specifically related to high voltage electric equipment inside and loosen the shelf depreciation positioning diagnosticing method produced.First gather local discharge signal, confirm that collection signal point is correct; Whether analysis confirmation exists shelf depreciation, will carry out filtering to the signal collected, and by continuous practice, finds that the frequency band at the abnormal place of different shelf depreciation is not identical yet, and occurs and phase place is also different the shelf depreciation duration; Shelf depreciation is located, and according to the transport property of signal, determines its point of discharge.The key problem in technology of this patent and innovative point are find that high voltage electric equipment is because loosening the frequency band of the local discharge signal existence caused, and continuous discharging time is short, and due to the more difficult collection of voltage signal, it is reliable for finding that collection current signal carries out conversion location.Beneficial effect is: above determination method can be analyzed high voltage electric equipment online fast and accurately and loosen the shelf depreciation that loose contact causes, and detects that to analyze accurately location reliable.
Description
Technical field
The invention belongs to technical field of electricity, be specifically related to high voltage electric equipment inside and loosen the shelf depreciation positioning diagnosticing method produced.
Background technology
Along with developing rapidly and the demand of China to the energy of national economy, particularly the demand of electric energy is constantly increased.The raising of voltage class of electric power system makes the Insulation Problems of electrical equipment seem more and more outstanding, large electric equipment (as generator, transformer) in the middle of operation and mini-plant (as electric capacitor, insulator etc.) will cause the power failure in even full area, local once break down, and cause serious adverse consequences to the production of other departments of national economy and running.In order to ensure insulation of electrical installation safe and reliable operation, will adopt good insulating material on the one hand, transformation manufacturing process improves dielectric strength and the quality of equipment, prior one side, to exercise supervision to the insulation status of electrical equipment in operation exactly, grasp the ruuning situation of equipment at any time.
Along with the development of power industry, when high voltage electric equipment runs in electrical network, if inner there is the insulation defect caused because manufacturing bad, aging and outside destroy, the accident of can make a difference equipment and electric power netting safe running in it.The safe operation important in inhibiting in the industrial production of electrical equipment, and shelf depreciation is one of major reason causing high voltage equipment insulation to damage.
Partial Discharge Detection has offline inspection and on-line checkingi two kinds of methods at present: off-line local is put and detected interference small-signal detection collection accurately, but cannot analog machine actual motion state, be difficult to the insulation defect finding to exist completely, and detection needs equipment to quit work; Shelf depreciation on-line checkingi, can detect it when equipment normally runs, and can carry out shelf depreciation Real-Time Monitoring, the variation tendency of analytical equipment insulation.But electric system is large to local discharge signal interference, detects analytical technology and require high.
Under above-mentioned background, Partial Discharge Detecting Technology causes the concern of various countries very early.There are formulation off-line Partial Discharge Detection standard in International Electrotechnical Commission (IEC) and China, but to local On-line Discharge Detection because technical matters does not also go out any examination criteria.
Summary of the invention
The object of this invention is to provide high voltage electric equipment inside and loosen the shelf depreciation positioning diagnosticing method produced.
The object of the invention is to be achieved through the following technical solutions:
Local discharge signal gathers: the necessary on-line operation of high voltage electric equipment, local discharge signal gathers Fig. 1, frequency of utilization scope is the ground wire that the High Frequency Current Sensor of 300kHz-10000kHz is arranged on high voltage electric equipment, gathers the current signal that shelf depreciation flows through ground.Utilized bandwidth is at more than 20000kHz, and sampling rate is that 2. the oscillograph (band filtered Software) of 100MS/S carries out image data, and oscillographic one end is connected with High Frequency Current Sensor, and the oscillographic other end is connected with collection source current.
Be confirmed whether to there is shelf depreciation: filtering process is carried out to data, filter range 2000kHz-5000kHz.For supply frequency 50HZ system, discharge time is spaced apart 10mS, can determine that this equipment exists shelf depreciation.
Shelf depreciation type: analyze electric discharge type, first measures the supply voltage phase place at discharge signal place, gathers the phase place of shelf depreciation by gathering source current, and fetch equipment operate power factor, carry out the phase place of conversion shelf depreciation.Result is presented at point of zero voltage and discharges, and the discharge period be less than 0.719mS for loosen cause loose contact to cause.
Shelf depreciation is located: after determining shelf depreciation type, and the zero-point voltage at local discharge signal place is mutually for abnormity point place phase occurs.It is inner or outside for detecting generation shelf depreciation point with very high frequency(VHF) sensor (0.5-1.5GHz), and location shelf depreciation point.With the water-tight equipment of metallic ground, very high frequency(VHF) sensor cannot detect the radio signal that inner shelf depreciation sends, and can find its point of discharge timely when shelf depreciation occurs for high-voltgae pothead, dry-type transformer, GIS.
Beneficial effect is: above determination method can be analyzed high voltage electric equipment online fast and accurately and loosen the shelf depreciation that loose contact causes, and detects that to analyze accurately location reliable.
Accompanying drawing explanation
Fig. 1 is local discharge signal collection figure of the present invention.
In figure: 1. oscillograph, 3. the collection source current of High Frequency Current Sensor, 2. speed 100MS/S.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
High voltage electric equipment inside loosens the shelf depreciation positioning diagnosticing method produced, and comprises following step: local discharge signal collection, be confirmed whether to exist shelf depreciation, shelf depreciation type, shelf depreciation location; It is characterized in that:
A. local discharge signal collection:
The necessary on-line operation of high voltage electric equipment, frequency of utilization scope is the High Frequency Current Sensor (1) of 300kHz-10000kHz, and High Frequency Current Sensor (1) is arranged on the ground wire of high voltage electric equipment, gathers the current signal that shelf depreciation flows through ground; Utilized bandwidth is at more than 20000kHz, with filtered Software and the oscillograph (2) that sampling rate is 100MS/S carries out image data, one end of oscillograph (2) is connected with High Frequency Current Sensor (1), and the other end of oscillograph (2) is connected with collection source current (3);
B. be confirmed whether to there is shelf depreciation:
Filtering process is carried out to data, filter range 2000kHz-5000kHz; For supply frequency 50HZ system, discharge time is spaced apart 10mS, can determine that this equipment exists shelf depreciation;
C. shelf depreciation type:
Analyzing electric discharge type, first measure the supply voltage phase place at discharge signal place, gathering the phase place of shelf depreciation by gathering source current (3), and fetch equipment operate power factor, carry out the phase place of conversion shelf depreciation; Result is presented at point of zero voltage and discharges, and the discharge period be less than 0.719mS for loosen cause loose contact to cause;
D. shelf depreciation location:
After determining shelf depreciation type, mutually for there is abnormity point place phase in the zero-point voltage at local discharge signal place; It is inner or outside for detecting generation shelf depreciation point with the very high frequency(VHF) sensor of 0.5-1.5GHz, and location shelf depreciation point; With the water-tight equipment of metallic ground, very high frequency(VHF) sensor cannot detect the radio signal that inner shelf depreciation sends, and can find its point of discharge timely when shelf depreciation occurs for high-voltgae pothead, dry-type transformer, GIS.
Claims (1)
1. high voltage electric equipment inside loosens the shelf depreciation positioning diagnosticing method produced, and comprises following step: local discharge signal collection, be confirmed whether to exist shelf depreciation, shelf depreciation type, shelf depreciation location; It is characterized in that:
A. local discharge signal collection:
The necessary on-line operation of high voltage electric equipment, frequency of utilization scope is the High Frequency Current Sensor (1) of 300kHz-10000kHz, and High Frequency Current Sensor (1) is arranged on the ground wire of high voltage electric equipment, gathers the current signal that shelf depreciation flows through ground; Utilized bandwidth is at more than 20000kHz, with filtered Software and the oscillograph (2) that sampling rate is 100MS/S carries out image data, one end of oscillograph (2) is connected with High Frequency Current Sensor (1), and the other end of oscillograph (2) is connected with collection source current (3);
B. be confirmed whether to there is shelf depreciation:
Filtering process is carried out to data, filter range 2000kHz-5000kHz; For supply frequency 50Hz system, discharge time is spaced apart 10mS, can determine that this equipment exists shelf depreciation;
C. shelf depreciation type:
Analyzing electric discharge type, first measure the supply voltage phase place at discharge signal place, gathering the phase place of shelf depreciation by gathering source current (3), and fetch equipment operate power factor, carry out the phase place of conversion shelf depreciation; Result is presented at point of zero voltage and discharges, and the discharge period be less than 0.719mS for loosen cause loose contact to cause;
D. shelf depreciation location:
After determining shelf depreciation type, mutually for there is abnormity point place phase in the zero-point voltage at local discharge signal place; It is inner or outside for detecting generation shelf depreciation point with the very high frequency(VHF) sensor of 0.5-1.5GHz, and location shelf depreciation point; With the water-tight equipment of metallic ground, very high frequency(VHF) sensor cannot detect the radio signal that inner shelf depreciation sends, and can find its point of discharge timely when shelf depreciation occurs for high-voltgae pothead, dry-type transformer, GIS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410005643.5A CN103744006B (en) | 2014-01-07 | 2014-01-07 | High voltage electric equipment inside loosens the shelf depreciation positioning diagnosticing method produced |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410005643.5A CN103744006B (en) | 2014-01-07 | 2014-01-07 | High voltage electric equipment inside loosens the shelf depreciation positioning diagnosticing method produced |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103744006A CN103744006A (en) | 2014-04-23 |
| CN103744006B true CN103744006B (en) | 2016-03-23 |
Family
ID=50501041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410005643.5A Active CN103744006B (en) | 2014-01-07 | 2014-01-07 | High voltage electric equipment inside loosens the shelf depreciation positioning diagnosticing method produced |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103744006B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199320A (en) * | 2016-07-11 | 2016-12-07 | 三峡大学 | A kind of method for testing imperfect contact based on shelf depreciation technology |
| CN106226666B (en) * | 2016-08-31 | 2019-11-12 | 成都凯赛尔电子有限公司 | A kind of detection method of high pressure vacuum device inside discharge condition |
| CN106771910B (en) * | 2016-12-09 | 2020-08-11 | 国网北京市电力公司 | Method and device for detecting defects of combined electrical appliance |
| CN106704080B (en) * | 2017-01-04 | 2019-02-12 | 北京中元瑞讯科技有限公司 | The diagnostic method of thrust head of water turbine power generating set looseness fault based on online data |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286934B (en) * | 1994-02-25 | 1998-04-08 | Kansai Electric Power Co | Abnormality detecting method and apparatus for electric equipment,particularly for a rotating electric machine |
| CN2620372Y (en) * | 2002-09-22 | 2004-06-09 | 西安高压电器研究所 | Local discharge detector for GIS |
| CN1553207A (en) * | 2003-12-18 | 2004-12-08 | 西安交通大学 | High-frequency wide-band local discharging on-line monitoring method in gas insulative converting station |
| CN1851489A (en) * | 2006-05-22 | 2006-10-25 | 西南交通大学 | Variable frequency high-voltage motor insulated local discharge measuring method and its special measuring instrument |
| CN101644738A (en) * | 2009-09-02 | 2010-02-10 | 江苏省电力公司常州供电公司 | Local discharge detecting system of sulfur hexafluoride gas-insulating and fully-enclosed combined electric apparatus |
| CN102081136A (en) * | 2010-12-01 | 2011-06-01 | 西安交通大学 | Method for on-site GIS (Gas-insulated metal-enclosed switchgear) partial discharge detection under impulse voltage |
| JP2011242368A (en) * | 2010-05-21 | 2011-12-01 | Nissin Electric Co Ltd | Insulation diagnostic device |
| CN202421415U (en) * | 2011-11-28 | 2012-09-05 | 甘肃省电力公司兰州超高压输变电公司 | High frequency current transformer for partial discharge test |
| CN103389446A (en) * | 2013-07-26 | 2013-11-13 | 武汉利捷电子技术有限责任公司 | Electrical positioning method for partial discharge of power transformer |
| CN103472370A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | Partial discharge monitoring data processing method |
-
2014
- 2014-01-07 CN CN201410005643.5A patent/CN103744006B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286934B (en) * | 1994-02-25 | 1998-04-08 | Kansai Electric Power Co | Abnormality detecting method and apparatus for electric equipment,particularly for a rotating electric machine |
| CN2620372Y (en) * | 2002-09-22 | 2004-06-09 | 西安高压电器研究所 | Local discharge detector for GIS |
| CN1553207A (en) * | 2003-12-18 | 2004-12-08 | 西安交通大学 | High-frequency wide-band local discharging on-line monitoring method in gas insulative converting station |
| CN1851489A (en) * | 2006-05-22 | 2006-10-25 | 西南交通大学 | Variable frequency high-voltage motor insulated local discharge measuring method and its special measuring instrument |
| CN101644738A (en) * | 2009-09-02 | 2010-02-10 | 江苏省电力公司常州供电公司 | Local discharge detecting system of sulfur hexafluoride gas-insulating and fully-enclosed combined electric apparatus |
| JP2011242368A (en) * | 2010-05-21 | 2011-12-01 | Nissin Electric Co Ltd | Insulation diagnostic device |
| CN102081136A (en) * | 2010-12-01 | 2011-06-01 | 西安交通大学 | Method for on-site GIS (Gas-insulated metal-enclosed switchgear) partial discharge detection under impulse voltage |
| CN202421415U (en) * | 2011-11-28 | 2012-09-05 | 甘肃省电力公司兰州超高压输变电公司 | High frequency current transformer for partial discharge test |
| CN103389446A (en) * | 2013-07-26 | 2013-11-13 | 武汉利捷电子技术有限责任公司 | Electrical positioning method for partial discharge of power transformer |
| CN103472370A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | Partial discharge monitoring data processing method |
Non-Patent Citations (1)
| Title |
|---|
| 发电机局部放电甚高频检测方法的研究及应用;喇元 等;《发电机局部放电甚高频检测方法的研究及应用》;20091130;第22卷(第11期);第29-33页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103744006A (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101881802B (en) | Dry type hollow reactor interturn short circuit fault on-line real-time detection method | |
| CN103490511B (en) | A kind of power distribution network communication terminal detection system and method | |
| CN204166106U (en) | Threephase asynchronous machine malfunction monitoring and warning system | |
| CN103576059B (en) | A kind of transformer turn-to-turn electric discharge resultant fault diagnostic method and system | |
| CN103744006B (en) | High voltage electric equipment inside loosens the shelf depreciation positioning diagnosticing method produced | |
| CN204064509U (en) | A kind of temperature of high-tension switch cabinet on-line monitoring system | |
| CN105988063A (en) | Power transmission line fault hidden risk integrated on-line monitoring method and device | |
| CN105116283A (en) | Downhole power cable insulation monitoring device | |
| CN106443433B (en) | Breaker state monitoring system and method based on opening and closing coil current | |
| CN109831033B (en) | Power supply line early warning protection equipment and segmentation monitoring early warning system | |
| CN101915884A (en) | Identification method of ground fault phases in three-phase ungrounded system and identification device thereof | |
| CN105116300A (en) | Downhole cable insulation online monitoring system | |
| CN108344917A (en) | The cross interconnected cable on-line fault diagnosis method of 110kV crosslinked polyethylenes based on method of loci | |
| CN104459494A (en) | Partial discharge measurement device for GIS device under site impulse voltage | |
| EP3073634B1 (en) | A method for determining the operating status of a spring charging motor for a lv or mv switching apparatus and a diagnostic system implementing said method | |
| CN204214974U (en) | High voltage power cable terminal on-Line Monitor Device | |
| CN201740840U (en) | Earth fault phase identification device in three-phase unearthed system | |
| CN111679163A (en) | On-line insulation monitoring device for turns of dry-type reactor | |
| CN104062555B (en) | The discrimination method of distribution line high resistance earthing fault characteristic harmonics | |
| CN104061849A (en) | System for on-line detection of winding deformation based on overvoltage signal and response of transformer | |
| CN104090211B (en) | A kind of online test method of distribution line high resistance earthing fault | |
| CN102540012A (en) | Method and device for judging single-phase earth fault of low-current grounding system | |
| CN204287336U (en) | The data processing equipment of high-tension cable on-line insulation monitoring | |
| CN104034966A (en) | Online measurement method of MYPTJ mining high voltage cable insulation resistance | |
| CN104483571A (en) | Cable insulation detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |