CN109239540A - High-voltage arrester defect diagnostic method and voltage distribute measuring device - Google Patents
High-voltage arrester defect diagnostic method and voltage distribute measuring device Download PDFInfo
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- CN109239540A CN109239540A CN201810836033.8A CN201810836033A CN109239540A CN 109239540 A CN109239540 A CN 109239540A CN 201810836033 A CN201810836033 A CN 201810836033A CN 109239540 A CN109239540 A CN 109239540A
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- 230000007547 defect Effects 0.000 title claims abstract description 14
- 238000002405 diagnostic procedure Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 238000005259 measurement Methods 0.000 claims abstract description 39
- 238000010292 electrical insulation Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims description 10
- 239000013307 optical fiber Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims 1
- 230000005684 electric field Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005697 Pockels effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000019491 signal transduction Effects 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
Classifications
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention discloses a kind of high-voltage arrester defect diagnostic methods, comprising: S01, will be used as measurement point at small full skirt each in arrester, obtains the field strength of each measurement point；S02, the current potential of each measurement point is obtained by the field strength of each measurement point in step S01 to get the Potential distribution of every section arrester is arrived；S03, pass through the Potential distribution situation of every section arrester, diagnostic device built-in electrical insulation situation.The invention also discloses a kind of high-voltage arrester voltages to distribute measuring device, including control unit, field strength detection unit and insulating bar, the field strength detection unit are fixedly installed in the end of the insulating bar, for measuring the field strength in arrester at each small full skirt；Described control unit is connected with the field strength detection unit signal, and the voltage for obtaining arrester according to the field strength at each small full skirt distributes.Method and device of the invention all has the advantages that easy to operate, detection is accurate, safe and reliable.
Description
Technical field
The invention mainly relates to arrester technical field, a kind of high-voltage arrester defect diagnostic method and voltage distribution are refered in particular to
Measuring device.
Background technique
Electric system arrester equipment is likely to occur the defects of aging or dampness in long-term charging operation, for monitoring in time
Arrester operating status, discovery early defect, need to periodically carry out live detection, existing live detection method, which specifically includes that, keeps away
Leakage current detection, infrared thermal imaging detection, EUV discharge detection and high frequency partial discharge examination under thunder device operating status.Wherein
It measures for the Potential distribution on arrester surface in substation operation and does not have development also, there are two main difficulties: 1) high pressure
The voltage of electrical equipment can not be measured directly, and measurement high potential generally measures the voltage of divider secondary side by divider, then
Conversion obtains voltage to be measured, and utilizes arrester in the direct parallel running of divider and infeasible；2) it is visited according to electric signal
Head obtains signal on porcelain vase surface, and the high-voltage potential on arrester surface can be introduced by being transferred in measuring instrument, cause instrument high pressure
Damage.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
High-voltage arrester defect diagnostic method kind easy to operate, measurement is accurate, safe and reliable, and accordingly provide a kind of structure it is simple,
Voltage easy to operate distributes measuring device.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of high-voltage arrester defect diagnostic method, comprising the following steps:
S01, it will be used as measurement point at small full skirt each in arrester, obtains the field strength of each measurement point；
S02, it the current potential of each measurement point is obtained by the field strength of each measurement point in step S01 is kept away to get to every section
The Potential distribution of thunder device；
S03, pass through the Potential distribution situation of every section arrester, diagnostic device built-in electrical insulation situation.
As a further improvement of the above technical scheme:
In step S01, measurement point is parallel with small full skirt, and is 1~2cm with the edge of small full skirt distance.
The invention also discloses a kind of high-voltage arrester voltages to distribute measuring device, including control unit, field strength detection list
Member and insulating bar,
The field strength detection unit, is fixedly installed in the end of the insulating bar, for measuring each umbellule in arrester
Field strength at skirt；
Described control unit is connected with the field strength detection unit signal, for being obtained according to the field strength at each small full skirt
Voltage to arrester distributes.
As a further improvement of the above technical scheme:
The field strength detection unit is connect with described control unit by optical fiber.
The insulating bar includes cross bar and vertical bar, and the field strength detection unit is installed on one end of cross bar, cross bar it is another
End is connected with the end of vertical bar.
The vertical bar is the insulated telescopic rods with damping.
On the cross bar the distance between the test point of field strength detection unit and cross bar upper surface be big full skirt lower surface with
Vertical range between small full skirt.
Insulation stopper section is provided on the cross bar, for offseting with big full skirt, so that the test point of field strength detection unit
It is 1~2cm with the horizontal distance between small full skirt.
The field strength detection unit is fastened on cross bar by band or bonding method.
The field strength detection unit is Bo Keer sensor.
Compared with the prior art, the advantages of the present invention are as follows:
High-voltage arrester defect diagnostic method of the invention obtains every section by measuring the electric field strength of each measurement point
The Potential distribution of arrester, so as to diagnostic device built-in electrical insulation situation；By the way of measuring electric field strength, it is easy to real
It is existing, the electric field strength of measurement point will not be had an impact, easy to operate, raising is made when improving the accuracy of measurement, and measuring
The safety of industry personnel.
High-voltage arrester voltage of the invention distributes measuring device, detects at small full skirt (measurement by field strength detection unit
Point) field strength, then by control unit obtain each section arrester voltage distribute, thus for arrester built-in electrical insulation situation into
Row analysis provides analysis data；Apparatus structure is simple, easy to operate and safe and reliable.
Detailed description of the invention
Fig. 1 is flow chart of the method for the present invention.
Fig. 2 is the structural schematic diagram of arrester in the present invention.
Fig. 3 is the structural schematic diagram of every section arrester porcelain vase in arrester of the present invention.
Fig. 4 is one of the specific implementation example diagram of measuring device in the present invention.
Fig. 5 is two of the specific implementation example diagram of measuring device in the present invention.
Figure label indicates: 1, arrester；101, big full skirt；102, small full skirt；2, insulating bar；201, vertical bar；202, horizontal
Bar；3, field strength detection unit；4, control unit；5, optical fiber.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment, the invention will be further described.
As shown in Figure 1, the high-voltage arrester defect diagnostic method of the present embodiment, comprising the following steps:
S01, it will be used as measurement point at small full skirt 102 each in arrester 1, obtains the field strength (electric-field strength of each measurement point
Degree)；
S02, it the current potential of each measurement point is obtained by the field strength of each measurement point in step S01 is kept away to get to every section
The Potential distribution of thunder device 1；
S03, pass through the Potential distribution situation of every section arrester 1, diagnostic device built-in electrical insulation situation.
High-voltage arrester defect diagnostic method of the invention obtains every section by measuring the electric field strength of each measurement point
The Potential distribution of arrester 1, so as to diagnostic device built-in electrical insulation situation；By the way of measuring electric field strength, it is easy to real
It is existing, the electric field strength of measurement point will not be had an impact, easy to operate, raising is made when improving the accuracy of measurement, and measuring
The safety of industry personnel.
In the present embodiment, in step S01, being moved up and down by insulating bar 2, it is ensured that measurement point is parallel with small full skirt 102,
And with the edge of small full skirt 102 apart from being 1~2cm, this measurement point can accurately obtain electric field strength, to improve detection
Accuracy.
As shown in Figure 2-5, the present invention further correspondingly discloses a kind of high-voltage arrester voltage distribution measuring device, including control
Unit 4, field strength detection unit 3 and insulating bar 2 processed, field strength detection unit 3 (such as Bo Keer sensor), are fixedly installed in insulating bar
2 end, for measuring the field strength in arrester 1 at each small full skirt 102；Control unit 4, with 3 signal of field strength detection unit
It is connected, is connected especially by optical fiber 5, the voltage for obtaining arrester 1 according to the field strength at each small full skirt 102 distributes.This
The high-voltage arrester voltage of invention distributes measuring device, and the field of (measurement point) at small full skirt 102 is detected by field strength detection unit 3
By force, then by control unit 4 the voltage distribution of each section arrester 1 is obtained, so that the built-in electrical insulation situation for arrester 1 is divided
Analysis provides analysis data；Apparatus structure is simple, easy to operate and safe and reliable.
As shown in Figures 2 and 3, specifically, arrester 1 includes more piece lightning arrester body, the housing of every section lightning arrester body
Successively alternately it is equipped with big full skirt 101 and small full skirt 102.Insulating bar 2 includes cross bar 202 and vertical bar 201, and field strength detection unit 3 is pacified
The other end of one end loaded on cross bar 202, cross bar 202 is connected with the fastening of the end of vertical bar 201.Wherein vertical bar 201 is band damping
Insulated telescopic rods, it is desirable that length 8m, every section 2m long, insulating requirements pressure resistance 580kV.Wherein cross bar 202 can be used section and be
The bar of cuboid, is easily installed field strength detection unit 3, and field strength detection unit 3 is then fastened on cross bar by band or bonding method
202 lower surface, the distance between the test point of field strength detection unit 3 and 202 upper surface of cross bar be 101 lower surface of big full skirt with
Vertical range between small full skirt 102, thus when measuring, as long as by under the upper surface of cross bar 202 and big full skirt 101
Surface fits, that is, can guarantee that the test point of field strength detection unit 3 and small full skirt 102 are located in same level；Such as Fig. 3 institute
Show, insulation stopper section can also be provided on cross bar 202, for offseting with big full skirt 101, i.e., when measuring, as long as
Stopper section and big full skirt 101 are offseted, the test point of field strength detection unit 3 is then 1 with the horizontal distance between small full skirt 102
~2cm guarantees the accuracy of measurement position.
1 defect diagnostic method of high-voltage arrester is done into one below with reference to this 1 voltage of high-voltage arrester distribution measuring device
Step explanation:
S1: being directed to more piece arrester 1 shown in Fig. 2, obtain the model of arrester 1 first, searches drawing, root according to model
The spacing between the height H of each 1 porcelain vase of section arrester, the quantity n and adjacent big full skirt 101 of big full skirt 101 is obtained according to drawing
L, the full skirt and upper flange distance L of the top one0With a bottom big full skirt 101 and lower flange distance Ln；Such as Fig. 3
It is shown；
S2: setting measurement point, the number of measurement point are the number n of big full skirt 101, and measurement position is to be tightly attached to big full skirt
101 lower plane, at small 102 1~2cm of edge placement of full skirt, floor map is as shown in Figure 3.
S3: the optical fiber field intensity tester (such as Bo Keer sensor) based on Pockel's effect is utilized, as shown in figure 4, by wave
Ke Er sensor bind holds telescopic insulation rod 2 successively close to each measurement point, stands 10s on thin insulating bar 2, to be controlled
The registration of unit 4 (instrument on ground) processed records each field strength numerical value E after stablizing1、E2、....、En；
Measure Bo Keer (poker ' s) sensor for using for it, the geometric dimension of Sensitive Apparatus only about 5 × 5mm will
For its sealing in the shell that insulating materials is constituted, outer dimension is 20 × 26 × 60mm.Sensor selfcapacity is about 10pF, absolutely
1010 Ω of edge resistance >, for the passive device for hardly consuming energy.Sensor is mainly by extraordinary crystal, optical glass and insulation
Material is constituted, small in size and do not have can and metal-ware, and when measuring field strength, sensor will not distort detected space electric field
Distribution, is only placed in sensor on space measurement point；In addition, sensor (high-pressure side) and instrument (are placed on ground) it
Between, it is isolated by optical fiber 5, can avoid high-voltage electromagnetic field interference, and guarantees adequately safety.Sensor signal is transmitted, is used
Optical fiber 5 carries out signal transduction, and avoiding cable conducted signal from introducing high potential causes equipment damage or personnel to be got an electric shock.
S4: according to field strength numerical value E1, E2 ..., En are calculated, two using simplifying according to current potential integral formula U=∫ Edl
Potential difference Δ U between measurement pointk=0.5 (Ek+Ek+1) 1 to get the current potential for arriving each measurement point, that is, Potential distribution.
Such as in 500kV arrester on-site test, the field strength of the small full skirt 1#, small full skirt 2# that partially measure on middle section arrester are
1704kV/cm, 1436kV/cm, two measurement point spacing are 76mm, then point-to-point transmission potential difference is 11.93kV.
S5: by every 1 voltage distribution condition of section arrester, arrester built-in electrical insulation situation is diagnosed.When arrester occur by
When tide, valve block deterioration, the voltage apportioning cost of the section arrester will will appear variation.On-the-spot test shows each in arrester operation
Section arrester voltage apportioning cost changes compared with initial value more than 30%, or alternate difference, then should be as early as possible more than 30% with model device
Arrange the test confirmation that has a power failure.
Although the present invention has been disclosed as a preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability
The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, all
Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment,
Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (10)
1. a kind of high-voltage arrester defect diagnostic method, which comprises the following steps:
S01, it will be used as measurement point at small full skirt (102) each in arrester (1), obtains the field strength of each measurement point；
S02, the current potential of each measurement point is obtained by the field strength of each measurement point in step S01 to get every section arrester is arrived
(1) Potential distribution；
S03, pass through the Potential distribution situation of every section arrester (1), diagnostic device built-in electrical insulation situation.
2. high-voltage arrester defect diagnostic method according to claim 1, which is characterized in that in step S01, measurement point
It is parallel with small full skirt (102), and be 1~2cm with the edge of small full skirt (102) distance.
3. a kind of high-voltage arrester voltage distributes measuring device, which is characterized in that including control unit (4), field strength detection unit
(3) and insulating bar (2),
The field strength detection unit (3), is fixedly installed in the end of the insulating bar (2), each in arrester (1) for measuring
Field strength at small full skirt (102)；
Described control unit (4) is connected with field strength detection unit (3) signal, at according to each small full skirt (102)
Field strength obtains the voltage distribution of arrester (1).
4. high-voltage arrester voltage according to claim 3 distributes measuring device, which is characterized in that the field strength detection is single
First (3) are connect with described control unit (4) by optical fiber (5).
5. high-voltage arrester voltage according to claim 3 or 4 distributes measuring device, which is characterized in that the insulating bar
It (2) include cross bar (202) and vertical bar (201), the field strength detection unit (3) is installed on one end of cross bar (202), cross bar
(202) the other end is connected with the end of vertical bar (201).
6. high-voltage arrester voltage according to claim 5 distributes measuring device, which is characterized in that the vertical bar (201)
For the insulated telescopic rods with damping.
7. high-voltage arrester voltage according to claim 5 distributes measuring device, which is characterized in that the cross bar (202)
The distance between the test point of upper field strength detection unit (3) and cross bar (202) upper surface are big full skirt (101) lower surface and umbellule
Vertical range between skirt (102).
8. high-voltage arrester voltage according to claim 6 distributes measuring device, which is characterized in that the cross bar (202)
On be provided with insulation stopper section, for offseting with big full skirt (101), so that the test point of field strength detection unit (3) and small full skirt
(102) horizontal distance between is 1~2cm.
9. high-voltage arrester voltage according to claim 5 distributes measuring device, which is characterized in that the field strength detection is single
First (3) are fastened on cross bar (202) by band or bonding method.
10. high-voltage arrester voltage according to claim 3 or 4 distributes measuring device, which is characterized in that the field strength inspection
Surveying unit (3) is Bo Keer sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810836033.8A CN109239540A (en) | 2018-07-26 | 2018-07-26 | High-voltage arrester defect diagnostic method and voltage distribute measuring device |
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|---|---|---|---|
| CN201810836033.8A CN109239540A (en) | 2018-07-26 | 2018-07-26 | High-voltage arrester defect diagnostic method and voltage distribute measuring device |
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Family
ID=65072562
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| CN201810836033.8A Pending CN109239540A (en) | 2018-07-26 | 2018-07-26 | High-voltage arrester defect diagnostic method and voltage distribute measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110516309A (en) * | 2019-07-31 | 2019-11-29 | 国网福建省电力有限公司建设分公司 | Roof power frequency electric field forecast Control Algorithm near common-tower double-return 500kV transmission line of electricity |
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Application publication date: 20190118 |