CN107192943A - Fault diagnosis method for switch in the GIS measured based on switching manipulation radiated electric field - Google Patents
Fault diagnosis method for switch in the GIS measured based on switching manipulation radiated electric field Download PDFInfo
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- CN107192943A CN107192943A CN201710453111.1A CN201710453111A CN107192943A CN 107192943 A CN107192943 A CN 107192943A CN 201710453111 A CN201710453111 A CN 201710453111A CN 107192943 A CN107192943 A CN 107192943A
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- gis
- electric field
- switch
- radiated electric
- fault diagnosis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention relates to fault diagnosis method for switch in a kind of GIS measured based on VFTO radiated electric fields produced by switching manipulation.Comprise the following steps：(1) ultrafast fast transient overvoltage VFTO produced after the switch motion in GIS radiated electric field is measured；(2) repeat step (1) carries out radiated electric field measurement after switch motion several times, is then summarized according to the measurement data of accumulation and obtains the switch motion Standard Ratio electric field oscillogram that the GIS is under normal condition；(3) status monitoring is carried out to GIS, when difference occurs in the relative Standard Ratio electric field oscillogram obtained with step (2) of the radiated electric field impulse waveform of the ultrafast fast transient overvoltage VFTO produced by certain corresponding switch motion, then it can determine whether that the switch occurs in that insulation fault in now GIS.The inventive method measurement gained repeated experimental verification of electric field pulse, with high efficiency and accuracy.
Description
Technical field
The present invention relates to switch fault diagnosis side in a kind of GIS measured based on VFTO radiated electric fields produced by switching manipulation
Method.
Background technology
In order to carry out condition monitoring and fault diagnosis, existing electrical measuring method and non-two kinds of monitoring classifications of electrical measuring method to GIS, its
In, electrical measuring method includes coupled capacitor method and hyperfrequency method；Non- electrical measuring method includes monitoring ultrasonic method, chemical measure and optics and supervised
Survey method.
None- identified and a variety of noises Partial discharge signal mixed in together when coupled capacitor method is tested at the scene；Hyperfrequency method
Detected signal attenuation is too fast, and very high to sensor requirements, costly；The signal mode of monitoring ultrasonic method is complicated, high
The decay of frequency part is quickly, it is necessary to which sensor is more；Chemical monitoring method is highly prone to the influence of adsorbent and drier in GIS, its
Sensitivity is very poor；Optical monitoring method is caused reflection to be influenceed sensitivity not high by GIS inner wall smooths.In summary, prior art
GIS fault diagnosises can not be adapted to completely and status monitoring is accurate, efficient, general moderately high technical requirements.
The content of the invention
It is an object of the invention to provide a kind of being measured based on switching manipulation radiated electric field with high efficiency and high accuracy
GIS in fault diagnosis method for switch.
Content is identical with claims herein, temporarily slightly.
Test proves that, the inventive method measurement gained repeated experimental verification of electric field pulse, with high efficiency and standard
True property.It can agree with the action mechanism perfection of switch, the producing cause of each electric field pulse can obtain reasonable dismissal.When
When GIS is in normal condition, measured Standard Ratio electric field waveform is clear and definite comprising pulse number, and these pulse characteristicses are bright
It is aobvious, there is perfect repeatability with experiment every time, and when there is insulation fault in switch, measured electric field pulse waveform is included
Pulse number gradually increase with the seriousness of insulation fault, and pulse highest amplitude substantially becomes big.
Brief description of the drawings
Accompanying drawing 1 closes the quasi- radiated electric field waveform of institute's mark for CB under 220kV GIS normal conditions；
CB closures survey radiated electric field waveform when accompanying drawing 2 starts to occur insulation fault by CB in 220kV GIS；
CB closures survey radiated electric field waveform when accompanying drawing 3 serious insulation fault occurs by CB in 220kV GIS.
Embodiment
The inventive method is related to gas insulated transformer substation (Gas Insulated Substation, GIS) fault diagnosis
Field, is related to one kind by measuring GIS inner breakers (Circuit Breaker, CB) or disconnecting switch
Ultrafast fast transient overvoltage (Very Fast Transient produced by (Disconnecting Switch, DS) action
Overvoltage, VFTO) radiated electric field pulse signal, in GIS switch carry out fault diagnosis method.
The inventive method aims to solve the problem that existing GIS condition monitoring and fault diagnosis means efficiency is low, the degree of accuracy is not high, pervasive
The problem of spending bottom is based on this radiation electric there is provided the radiated electric field of VFTO produced by non-physical contact measurement switch motion a kind of
Field signal realizes the status monitoring and the fault diagnosis of internal switch to GIS.
The inventive method is based on electronically small antenna and optical fiber transmission technique, manufactures electric field pulse measuring system, can avoid electricity
Magnetic disturbance, long-distance transmissions pulse signal.Using this measuring system, VFTO produced by switch motion under GIS normal conditions is measured
Radiated electric field impulse waveform, analyze this wave character and as reference waveform；When occurring partial discharge phenomenon in GIS
When, VFTO radiated electric field pulse produced by measuring the action of its respective switch, then this impulse waveform and reference waveform are significantly different,
Therefore the purpose of fault diagnosis is reached, the status monitoring to GIS is realized.
Embodiment 1：
By taking radiated electric field signal measured by CB closed procedures in 220kV GIS as an example, by Fig. 1, Fig. 2 and Fig. 3 contrast
Understand, P1-P4The wave character of this 4 electric field pulses and go out current moment with the progress measured every time almost it is any become
Change；It can be seen that, P1-P4This 4 electric field pulses are that initial running status is directly related in itself with breaker, are considered GIS normal
Typical standard electric field pulse under state, its feature is as shown in table 1.However, with the deterioration of CB internal classification capacitive insulation failures,
The electric field waveform middle arteries of VFTO produced by CB closed procedures are rushed number and gradually increased：If Fig. 2 is when insulation fault just starts to occur
Standard electric field wave shape compared to Fig. 1 has had more pulse P5, and during such as Fig. 3 serious insulation faults of appearance, not only electric field pulse is individual
Number rises to 8, and pulse maximum amplitude has reached 1.46kV/m.It is understood that as the insulation fault inside CB is cured
Plus it is serious, GIS is continuously increased because of the radiated electric field pulse number of VFTO produced by CB closed procedures.
Table 1 is for detailed features of the experiment with the quasi- electromagnetic pulse of GIS institute's marks：
The inventive method is to be based on electronically small antenna and optical fiber transmission technique, has manufactured the measuring system of transient electric field pulse.
This measuring system includes three parts：Electric field probe, optical fiber and signal receiver.In measurement experiment on the scene, electric field probe is tested
CB is placed around, and is connected by optical fiber with the optical signal receiver being placed in screened room；The telecommunications of this receiver output
Number it is eventually communicated in oscillograph.This measuring system response band is wider, covers 10kHz-400MHz.By adjusting electric small day
The length of line, its measurement range can change to 50kV/m from 100V/m.Because this measuring system does not have physically with GIS
It is directly connected to, therefore is not in interference between the two；In addition, because electric field probe is shielded well, signal transmission is also
Carried out, influenceed so this system will not also be disturbed by environment electromagnetics by optical fiber.In addition, this measuring system also has
It is convenient for carrying and installs easy advantage.
Using this measuring system, insulation tube arrester is carried out to GIS internal switches and comprised the following steps that：
(1) (all voltage class are applied to, because this method for diagnosing faults is not by voltage class to certain voltage class
Limitation) GIS in switch (disconnecting switch (Disconnecting Switch, DS) or breaker (Circuit
Breaker, CB)) produced VFTO radiated electric field is measured afterwards for action (closure disconnects)；
(2) in view of the service life switched in GIS, the experiment number for carrying out switching manipulation radiated electric field measurement is not to be exceeded
20 times；On this basis, measured data of experiment is accumulated, summarizes and obtains the switch motion standard spoke that the GIS is under normal condition
Radio oscillogram；
(3) status monitoring, the VFTO radiated electric field impulse waveform produced by certain corresponding switch motion are carried out to GIS
When difference occurs in relative standard's radiated electric field oscillogram, then it can determine whether to occur in that insulation fault inside now GIS.
Occur in step (3) difference refer to pulse number increase and pulse amplitude increase (for identical
Measuring apparatus and measurement distance, the radiated electric field arteries and veins of the VFTO produced by some switching manipulation of the GIS under normal condition
The number and maximum impulse amplitude of punching have repeatability, therefore, as long as the radiation of VFTO produced by there is institute's slowdown monitoring switch operation
The situation of pulse number increase and the pulse amplitude increase of electric field, then illustrate to occur in that insulation fault inside GIS.But, arteries and veins
The specific increased number of number and the increased amplitude of pulse amplitude are rushed, then the severe conditions with insulation fault are directly related, preceding
It has been discussed in detail afterwards；And the specific increased number of GIS its switching manipulation radiated electric field pulse number under insulation fault
Mesh and the increased amplitude of pulse amplitude have different characteristicness for different GIS, have not when studying different GIS
Same quantitative criteria is, it is necessary to treat with a certain discrimination.
And the elaboration of this patent emphasis is to be measured based on VFTO radiated electric fields produced by GIS switching manipulations to exhausted in GIS
Thought and method that reason barrier is diagnosed, this thinking have universality with method to all GIS.
Claims (3)
1. fault diagnosis method for switch in a kind of GIS measured based on switching manipulation radiated electric field, it is characterised in that including as follows
Step：
(1) ultrafast fast transient overvoltage VFTO produced after the switch motion in GIS radiated electric field is measured；
(2) repeat step (1) carries out radiated electric field measurement after switch motion several times, is then summarized according to the measurement data of accumulation
Obtain the switch motion Standard Ratio electric field oscillogram that the GIS is under normal condition；
(3) status monitoring is carried out to GIS, when the spoke of the ultrafast fast transient overvoltage VFTO produced by certain corresponding switch motion
When difference occurs in the relative Standard Ratio electric field oscillogram obtained with step (2) of radio field pulse waveform, then now GIS is can determine whether
The interior switch occurs in that insulation fault.
2. fault diagnosis method for switch, its feature in the GIS as claimed in claim 1 measured based on switching manipulation radiated electric field
It is：Occur difference in step (3) and refer to the increasing of pulse number, the increase of pulse amplitude.
3. fault diagnosis method for switch, its feature in the GIS as claimed in claim 1 measured based on switching manipulation radiated electric field
It is：Switch refers to disconnecting switch or breaker in step (1), and action refers to close or disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710453111.1A CN107192943A (en) | 2017-06-15 | 2017-06-15 | Fault diagnosis method for switch in the GIS measured based on switching manipulation radiated electric field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710453111.1A CN107192943A (en) | 2017-06-15 | 2017-06-15 | Fault diagnosis method for switch in the GIS measured based on switching manipulation radiated electric field |
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| CN201710453111.1A Pending CN107192943A (en) | 2017-06-15 | 2017-06-15 | Fault diagnosis method for switch in the GIS measured based on switching manipulation radiated electric field |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576907A (en) * | 2017-11-02 | 2018-01-12 | 国家电网公司 | Fault diagnosis method for switch based on the extraction of radiated electric field characteristic energy |
| CN108535618A (en) * | 2018-07-11 | 2018-09-14 | 云南电网有限责任公司电力科学研究院 | A kind of GIS method for detecting insulation defect |
| CN109916612A (en) * | 2019-03-28 | 2019-06-21 | 国网宁夏电力有限公司电力科学研究院 | GIS mechanical breakdown electrification detection system based on acoustics imaging |
| CN111812572A (en) * | 2020-07-28 | 2020-10-23 | 云南电网有限责任公司电力科学研究院 | External VFTO measurement calibration system |
| CN111830311A (en) * | 2020-07-28 | 2020-10-27 | 云南电网有限责任公司电力科学研究院 | External non-contact VFTO signal measuring device |
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| CN101900776A (en) * | 2010-07-02 | 2010-12-01 | 北京航空航天大学 | Lead insulating fault detecting method and device based on frequency spreading reflection |
| CN104655992A (en) * | 2013-08-20 | 2015-05-27 | 国家电网公司 | GIS partial discharge detection equipment and method |
| CN105759186A (en) * | 2016-03-31 | 2016-07-13 | 西安交通大学 | GIS (Gas Insulated Switchgear) on-site traveling wave test method and system |
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| CN101900776A (en) * | 2010-07-02 | 2010-12-01 | 北京航空航天大学 | Lead insulating fault detecting method and device based on frequency spreading reflection |
| CN104655992A (en) * | 2013-08-20 | 2015-05-27 | 国家电网公司 | GIS partial discharge detection equipment and method |
| CN105759186A (en) * | 2016-03-31 | 2016-07-13 | 西安交通大学 | GIS (Gas Insulated Switchgear) on-site traveling wave test method and system |
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| 汪沨等: "《气体绝缘开关装置(GIS)的近期发展动向》", 《电网技术》 * |
| 许军: "《特高压GIS快速暂态过电压（VFTO）的测量及分析》", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576907A (en) * | 2017-11-02 | 2018-01-12 | 国家电网公司 | Fault diagnosis method for switch based on the extraction of radiated electric field characteristic energy |
| CN108535618A (en) * | 2018-07-11 | 2018-09-14 | 云南电网有限责任公司电力科学研究院 | A kind of GIS method for detecting insulation defect |
| CN109916612A (en) * | 2019-03-28 | 2019-06-21 | 国网宁夏电力有限公司电力科学研究院 | GIS mechanical breakdown electrification detection system based on acoustics imaging |
| CN111812572A (en) * | 2020-07-28 | 2020-10-23 | 云南电网有限责任公司电力科学研究院 | External VFTO measurement calibration system |
| CN111830311A (en) * | 2020-07-28 | 2020-10-27 | 云南电网有限责任公司电力科学研究院 | External non-contact VFTO signal measuring device |
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Application publication date: 20170922 |