CN106680572A - Transformer substation transient voltage ground potential type measuring device and method based on electric field inversion - Google Patents
Transformer substation transient voltage ground potential type measuring device and method based on electric field inversion Download PDFInfo
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- CN106680572A CN106680572A CN201710153843.9A CN201710153843A CN106680572A CN 106680572 A CN106680572 A CN 106680572A CN 201710153843 A CN201710153843 A CN 201710153843A CN 106680572 A CN106680572 A CN 106680572A
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- ground potential
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- 230000005684 electric field Effects 0.000 title claims abstract description 63
- 230000001052 transient effect Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims description 16
- 239000004020 conductor Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 description 6
- 230000006698 induction Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000005697 Pockels effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
Abstract
The invention discloses a transformer substation transient voltage ground potential type measuring device and method based on electric field inversion. The transformer substation transient voltage ground potential type measuring device comprises an electric field sensor, a sensor positioning mechanism, a positioning tube and a signal transceiver, wherein the sensor positioning mechanism comprises a shielding box and an insulating cover, wherein an opening is formed in the upper end of the shielding box; the insulating cover is connected with the shielding box and covers the opening of the upper end of the shielding box; the positioning tube is arranged vertically; the upper end of the positioning tube is fixedly connected with the bottom of the shielding box; the electric field sensor is arranged in the shielding box and is connected with two communication lines; and the two communication lines successively penetrate through the shielding box and the positioning tube and then is connected with the signal transceiver. The invention further discloses a method for measuring voltage of a wire by using the measuring device. During mounting and repairing of the device, line outage is not required, measurement is carried out in an electric field inversion mode, when used, the device has good external environment interference resistance, and the accuracy of measurement can be improved.
Description
Technical field
The present invention relates to high-tension measurement field, specifically the transformer station's transient voltage ground potential formula measurement based on electric field inverting
Device and method.
Background technology
Transformer station's wire real-time voltage state in power system reflects whole piece circuit, substation equipment, load etc.
Running status, particularly when circuit meets with thunderbolt, resonance occurs, the accident such as line-to-ground or equipment fault occurs, wire electricity
Pressure amplitude value occurs fluctuation with waveform.By to transformer station's wire voltage, including power frequency steady state voltage and thunderbolt, system short-circuit or
The high frequency overvoltage signal that failure is produced carries out real-time monitoring, contributes to accurate failure judgement, searches problem.
For monitoring substation wire voltage, now with following discloses document：
China Patent Publication No. CN 101382568A disclosed a kind of optical fiber type voltage measurement side on March 11st, 2009
Method and its measurement apparatus, it transmits induction plate by placing metal induction plate on tested high-voltage conducting wires surface by optical fiber
Capacitance partial pressure numerical value, and then wire transient voltage is measured.Induction plate need to be arranged during the device application at high potential,
Necessary power failure operation, can make troubles to electric company and user.
China Patent Publication No. CN 104950189A disclosed a kind of optical fiber high voltage electromagnetic field on the 30th in September in 2015
Measuring probe, it measures power frequency electric field by electric charge induction electric field measurement method.The installation cost is low, but using when response speed
Degree is slower, it is impossible to accurately measure amplitude, the transient electric field of fast change.
China Patent Publication No. CN 105021901A disclosed a kind of electric field measurement in high voltage system on November 4th, 2015
And its measuring method, it adopts LASER Light Source to export laser beam, through Electric Field Modulated after electric-field sensor, subsequently transmission
To photodetector, electric-field intensity is obtained after process.External environmental interference is easily received during the device application, it is impossible to be directly used in circuit
The real-time monitoring of voltage.
The content of the invention
It is an object of the invention to solve to be needed when existing transformer substation voltage monitoring device is installed power failure operation and using when it is easy
By the technical problem of external environmental interference, there is provided the transformer station's transient voltage ground potential formula measurement apparatus based on electric field inverting,
It without to line outage, and is measured when installing with maintenance by the way of electric field inverting, using when have it is good
Anti- external environmental interference ability, accuracy of measurement can be lifted.The invention also discloses above-mentioned measurement apparatus measure traverse line voltage
Method.
The present invention solves the above problems and is achieved through the following technical solutions：Transformer station's transient state electricity based on electric field inverting
Pressure ground potential formula measurement apparatus, including electric-field sensor, sensor positioning mechanism, positioning pipe and signal transceiver, the sensing
Device detent mechanism includes shielded box and insulating lid, and the shielded box upper end open, insulating lid is connected and lock shield with shielded box
The upper end open of case, the positioning pipe is vertically arranged and its upper end is fixedly connected with shielded box bottom；The electric-field sensor sets
In shielded box, electric-field sensor is connected with two connections, and the connection described in two sequentially passes through shielded box and positioning pipe
It is connected with signal transceiver afterwards.The present invention is the measurement of ground potential formula, and electric-field sensor is using electricity electric-field sensor or optics electricity
Field sensor, for electricity electric-field sensor, principle is that the charge inducing that electric-field sensor surface produces is converted to into voltage letter
Number；For optical electric field sensor, principle is, based on Pockels effects, to employ common path interference structure, analyzes TE, TM pattern
Under the phase difference that produces after sensor of polarised light, it is counter to push away sensor surface electric-field intensity.When the present invention is applied, positioning pipe
Lower end is fixed in cement substrate.
Further, the sensor positioning mechanism also include sensor support base in the shielded box, insulation column and
Base, the base is fixedly connected with shielded box inner bottom part, and sensor support base passes through insulation column supporting and fixing in base top,
The electric-field sensor is fixed on sensor support base.The present invention is supported on electric-field sensor in shielded box by insulation column
At peak so that tested phase has sufficiently large field intensity when the present invention is applied.
Further, sensor support base upper surface indent is constituted draw-in groove, and the draw-in groove is that both ends open distinguishes position
In the rectangular through slot of sensor support base opposite sides, in the embedded draw-in groove of the electric-field sensor.The present invention is by sensor
Draw-in groove is set on seat so that the present invention using when be easy to stationary electric field sensor and connection wiring, and draw-in groove is set to into square
Shape groove, can guarantee that penetrating for electric field line, can reduce sensor support base to by the impact of side point electric-field intensity.
Further, the sensor support base upper surface is inclined-plane positioned at the region of draw-in groove both sides, and the inclined-plane is close
The level height of draw-in groove side is higher than its level height away from draw-in groove side.
Further, the side wall of the shielded box is provided with shutter.The present invention is by arranging shutter so that the present invention
Using when be easy to shielded box ventilation and heat.
Further, the positioning pipe includes upper pipe, down tube and pipe connections, and the top tube and down tube are vertically arranged,
The upper pipe lower end is fixedly connected by pipe connections with down tube upper end.Thus, the present invention can tear open when applying to positioning pipe
Dress so that the present invention using when be easy to transfer.
Further, the pipe connections are the female screwed pipe of tool, and the upper pipe lower end and down tube upper end are all provided with
There is the external screw thread matched with pipe connections internal thread, the top tube and down tube are connected by way of screw thread matching with pipe connections
Connect.The top tube and down tube of the present invention are connected by way of screw thread matching with pipe connections, can guarantee that the machinery of positioning pipe is strong
Degree so that safe and reliable when the present invention is applied.
Based on the method for above-mentioned measurement apparatus measure traverse line voltage, comprise the following steps：Measurement apparatus are stood on respectively three
Immediately below phase conductor, normal component of the space electric field produced for measure traverse line voltage at electric-field sensor upper surface, profit
Each phase conductor voltage is obtained with Inversion Calculation.
In sum, the invention has the advantages that：(1) measurement apparatus overall structure of the present invention is simple,
Facilitate implementation, low cost, when the present invention is applied, electric-field sensor is positioned in shielded box, its surface of shielded box primary recipient
Electric field, the electric interfering field that other charging equipments of non-tested phase conductor or transformer station are produced can be shielded, thus, present invention application
When can guarantee that the degree of accuracy of measurement.
(2) it is the measurement of ground potential formula when the present invention is applied, electric-field sensor is located at into each phase conductor when the present invention is applied
Lower section, monitor sensor surface electric field normal component, the transient voltage of three-phase conducting wire can be carried out by Inversion Calculation
Simultaneous Monitoring, in installation, measurement, the maintenance process in device system safety operation is not affected.
(3) the power frequency stable state and transient state electricity of 110kV and above transformer station can be carried out when the present invention is applied at ground potential
Measure during compacting, safe and reliable, strong antijamming capability.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of a specific embodiment of the invention；
The cross section structure diagram of sensor positioning mechanism in Fig. 2 Fig. 1.
Corresponding parts title is marked in accompanying drawing：1st, electric-field sensor, 2, sensor support base, 3, insulation column, 4,
Base, 5, shielded box, 6, locating flange, 7, connection, 8, insulating lid, 9, shutter, 10, upper pipe, 11, down tube, 12, pipe connection
Part, 13, installing plate, 14, signal transceiver.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1：
As shown in Figures 1 and 2, the transformer station's transient voltage ground potential formula measurement apparatus based on electric field inverting, including electric field
Sensor 1, sensor positioning mechanism, positioning pipe and signal transceiver 14, wherein, sensor positioning mechanism includes the He of shielded box 5
Insulating lid 8, the upper end open of shielded box 5 of the present embodiment, insulating lid 8 is connected with shielded box 5 and the upper end of lock shield case 5 is opened
Mouthful.In order that being easy to draining during the present embodiment application, the insulating lid 8 of the present embodiment is set to cone cylinder shape.The positioning of the present embodiment
Pipe is vertically arranged, and positioning pipe upper end is fixedly connected with the bottom of shielded box 5, and positioning pipe lower end is connected with installing plate 13.The present embodiment
In concrete setting, shielded box 5 and installing plate 13 are made using stainless steel material, and installing plate 13 is square plate, and it four
Manhole is provided with angle, during the present embodiment application, the manhole and embedded water on installing plate 13 is passed through using screw rod
In mud pedestal, to realize the fixation of the present embodiment.The electric-field sensor 1 of the present embodiment is located in shielded box 5, electric-field sensor 1
Two connections 7 are connected with, two connections 7 sequentially passed through and be connected with signal transceiver 14 after shielded box 5 and positioning pipe.This
Embodiment in concrete setting, because nylon has the advantages that to be easy to processing, high mechanical strength, good insulation preformance, the material of insulating lid 8
Choosing of fine quality adopts nylon.
During the present embodiment application, according to the electric-field intensity normal component of the lay down location of electric-field sensor 1, to design its measurement model
Enclose and sensitivity, response speed most up to ns levels, bandwidth effectively covers 20Hz~100MHz soon, so that the present embodiment disclosure satisfy that work
Amplitude, response speed and bandwidth requirement that frequency steady state voltage is measured with quick change transient voltage.
During using the present embodiment measure traverse line voltage, following steps are specifically included：Measurement apparatus are stood on respectively three-phase to lead
Immediately below line, normal component of the space electric field produced for measure traverse line voltage at the upper surface of electric-field sensor 1, using anti-
Drill and be calculated each phase conductor voltage.
Embodiment 2：
The present embodiment is made that on the basis of embodiment 1 and limits further below：The sensor localization machine of the present embodiment
Structure also includes sensor support base 2, insulation column 3 and base 4, wherein, sensor support base 2, insulation column 3 and base 4 are located at
In shielded box 5, base 4 is fixedly connected with the inner bottom part of shielded box 5, and sensor support base 2 is by the supporting and fixing of insulation column 3 in base
4 tops, electric-field sensor 1 is fixed on sensor support base 2.The present embodiment is in concrete setting, and the material of insulation column 3 is also excellent
Choosing adopts nylon.
The base 4 of the present embodiment is rectangular structure, and its upper surface central part indent is constituted circular groove, the circle
The bottom of groove is Circular Thin, and two manholes are provided with thin-walled, and correspondence fixes a positioning mode at each manhole
Blue 6, locating flange 6 is passed through for connection 7, for the ease of installing locating flange 6 and connection 7, the bottom of shielded box 5 of the present embodiment
Central authorities of portion also offer manhole.
The quantity of insulation column 3 is two in the present embodiment, in order that dismounting convenient, insulation column during the present embodiment application
3 one end are threaded hole, and the end is fixedly connected by insulating screw with sensor support base 2, and the other end of insulation column 3 sets for outer wall
Externally threaded cylindrical boss is put, on base 4 screwed hole is provided with, the screwed hole has what is matched with cylindrical boss external screw thread
Internal thread, insulation column 3 is fixedly connected in the screwed hole by the embedded base 4 of its cylindrical boss with base 4.
Base both sides are symmetrical arranged altogether the cylindrical boss of four tapped through holes, the tapped through hole of inner side two and insulation column
Coordinate, two, outside tapped through hole is coordinated by CARBURIZING FURNACE FOR STAINLESS FASTENER with stainless steel shielded box
Embodiment 3：
The present embodiment is made that on the basis of embodiment 2 and limits further below：On the sensor support base 2 of the present embodiment
End face indent is constituted draw-in groove, wherein, draw-in groove is the rectangular through slot that both ends open is located at respectively the opposite sides of sensor support base 2,
Electric-field sensor 1 is embedded in draw-in groove.In concrete setting, the upper surface of sensor support base 2 is located at the area of draw-in groove both sides to the present embodiment
Domain is inclined-plane, and level height of the inclined-plane near draw-in groove side is higher than its level height away from draw-in groove side.
Embodiment 4：
In order that being easy to the interior zone ventilation and heat of shielded box 5 during the present embodiment application, the present embodiment is in embodiment 1~reality
Apply and be made that on the basis of any one embodiment in example 3 and limit further below：The side wall of the shielded box 5 of the present embodiment is arranged
There is shutter 9.
Embodiment 5：
The present embodiment is made that on the basis of any one embodiment in 1~embodiment of embodiment 4 and limit further below
It is fixed：The positioning pipe of the present embodiment includes upper pipe 10, down tube 11 and pipe connections 12, wherein, upper pipe 10 and down tube 11 vertically set
Put, the lower end of upper pipe 10 is fixedly connected by pipe connections 12 with the upper end of down tube 11.The present embodiment in concrete setting, pipe connections
12 are the female screwed pipe of tool, the lower end of upper pipe 10 and the upper end of down tube 11 be equipped with match with the internal thread of pipe connections 12 outward
Screw thread, upper pipe 10 and down tube 11 are connected by way of screw thread matching with pipe connections 12.In order that during the present embodiment application
It is easy to that positioning pipe is fixed on shielded box 5, the lower end of shielded box 5 of the present embodiment is fixed with the connecting tube being vertically arranged, the company
Adapter is provided with external screw thread, and the upper end of upper pipe 10 is provided with the internal thread matched with connecting tube external screw thread, and connecting tube is matched by screw thread
Mode is fixedly connected with the upper end of upper pipe 10.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the specific embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (8)
1. transformer station's transient voltage ground potential formula measurement apparatus of electric field inverting are based on, it is characterised in that including electric-field sensor
(1), sensor positioning mechanism, positioning pipe and signal transceiver, the sensor positioning mechanism includes shielded box (5) and insulating lid
(8), shielded box (5) upper end open, insulating lid (8) be connected with shielded box (5) and lock shield case (5) upper end open,
The positioning pipe is vertically arranged and its upper end is fixedly connected with shielded box (5) bottom；The electric-field sensor (1) is located at shielded box
(5) in, electric-field sensor (1) is connected with two connections (7), the connection (7) described in two sequentially pass through shielded box (5) and
It is connected with signal transceiver (14) after positioning pipe.
2. transformer station's transient voltage ground potential formula measurement apparatus based on electric field inverting according to claim 1, its feature
It is that the sensor positioning mechanism also includes sensor support base (2), insulation column (3) and the base being located in shielded box (5)
(4), the base (4) is fixedly connected with shielded box (5) inner bottom part, and sensor support base (2) is by insulation column (3) supporting and fixing
In base (4) top, the electric-field sensor (1) is fixed on sensor support base (2).
3. transformer station's transient voltage ground potential formula measurement apparatus based on electric field inverting according to claim 2, its feature
It is that sensor support base (2) upper surface indent is constituted draw-in groove, the draw-in groove is both ends open respectively positioned at sensor
The rectangular through slot of seat (2) opposite sides, in the embedded draw-in groove of the electric-field sensor (1).
4. transformer station's transient voltage ground potential formula measurement apparatus based on electric field inverting according to claim 3, its feature
It is that sensor support base (2) upper surface is located at the region of draw-in groove both sides and is inclined-plane, and the inclined-plane near draw-in groove side
Level height is higher than its level height away from draw-in groove side.
5. transformer station's transient voltage ground potential formula measurement apparatus based on electric field inverting according to claim 1, its feature
It is that the side wall of the shielded box (5) is provided with shutter (9).
6. transformer station's transient voltage ground potential formula measurement apparatus based on electric field inverting according to claim 1, its feature
It is that the positioning pipe includes upper pipe (10), down tube (11) and pipe connections (12), the upper pipe (10) and down tube (11) are erected
Straight to arrange, upper pipe (10) lower end is fixedly connected by pipe connections (12) with down tube (11) upper end.
7. transformer station's transient voltage ground potential formula measurement apparatus based on electric field inverting according to claim 6, its feature
It is that to have female screwed pipe, upper pipe (10) lower end and down tube (11) upper end are all provided with the pipe connections (12)
There is the external screw thread matched with pipe connections (12) internal thread, the upper pipe (10) and down tube (11) are by way of screw thread matching
It is connected with pipe connections (12).
8. the method for the measurement apparatus measure traverse line voltage being based in claim 1~7 described in any one, it is characterised in that
Comprise the following steps：Measurement apparatus are stood on respectively immediately below three-phase conducting wire, for the space electric field that measure traverse line voltage is produced
Normal component at electric-field sensor (1) upper surface, using Inversion Calculation each phase conductor voltage is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153843.9A CN106680572A (en) | 2017-03-15 | 2017-03-15 | Transformer substation transient voltage ground potential type measuring device and method based on electric field inversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153843.9A CN106680572A (en) | 2017-03-15 | 2017-03-15 | Transformer substation transient voltage ground potential type measuring device and method based on electric field inversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106680572A true CN106680572A (en) | 2017-05-17 |
Family
ID=58829067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710153843.9A Pending CN106680572A (en) | 2017-03-15 | 2017-03-15 | Transformer substation transient voltage ground potential type measuring device and method based on electric field inversion |
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| Country | Link |
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| CN (1) | CN106680572A (en) |
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2017
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Application publication date: 20170517 |