CN103424594B - A kind of sensor-type optical voltage transformer of high pressure - Google Patents
A kind of sensor-type optical voltage transformer of high pressure Download PDFInfo
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- CN103424594B CN103424594B CN201310319711.0A CN201310319711A CN103424594B CN 103424594 B CN103424594 B CN 103424594B CN 201310319711 A CN201310319711 A CN 201310319711A CN 103424594 B CN103424594 B CN 103424594B
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Abstract
The present invention relates to a kind of sensor-type optical voltage transformer of high pressure, including insulator, high-field electrode, transformer housing, seal, sealing ring, transformer outer cover, optical voltage sensing head, optical fiber and electric unit；Insulator is fixedly connected on one end of transformer housing；One end of high-field electrode is also fixed connect with insulator in stretching into transformer housing by insulator；The transformer housing other end fixes connection insulator, and the upper surface of seal communicates with transformer enclosure interior, and the lower surface of seal communicates inside transformer outer cover, and transformer outer cover is fixing with transformer housing or seal to be connected；Optical voltage sensing head is placed in the bottom in sensor outer cover, and the optical fiber being connected with optical voltage sensing head is drawn out to the electric unit outside transformer outer cover.The present invention can improve certainty of measurement, has that volume is little, lightweight, good insulation preformance, shield effectiveness good, and application mode is flexible, the advantage that security is high.
Description
Technical field
The present invention relates to a kind of electrical equipment technical field, particularly a kind of sensor-type optical voltage transformer of high pressure.
Background technology
Power system measures primary side voltage with electromagnetic type or capacitance type potential transformer (PT or VT) always, for metering and
The equipment such as protection provide voltage signal.These transformers have accuracy of measurement height, manufacturing process maturation, test in the range of linearity
The verification advantage such as specification, the requirement of power system development at long time endoadaptation.But, along with power system voltage etc.
The raising of level and the increase of capacity, measure and protect the most perfect of requirement, and its weak point also becomes increasingly conspicuous, and exist is main
Problem includes: insulation difficulty is big, dynamic range is little, the output signal of transformer can not directly with Microcomputer measure and protect equipment
Interface, condenser type PT are easily generated ferromagnetic resonance etc..Therefore, substitute traditional detection means in the urgent need to new measuring method,
The appearing as of optical voltage transformer solves this problem and provides advantage.Optical voltage transformer is to utilize photoelectron technology
With the novel voltage mutual inductor that optical fiber sensing technology realizes voltage measurement.Compared with conventional voltage transformer, optical voltage mutual inductance
The high-voltage signal of device is by Optical Fiber Transmission to secondary device, and insulation is greatly simplified, bandwidth is high, dynamic range greatly, without magnetic saturation,
Light being easily installed, therefore, optical voltage transformer has the most wide application prospect in power system.
In the world, NGK company of Japan succeeds in developing optical voltage transformer model machine in May, 1986, discloses in July, 1991
Hanging net operation data for distribution automation system；ABB AB is proposed the light of 115kV～550kV in January, 1997
Learn the product introduction of voltage/current transformer；1997, GEC ALSTHOM company of France was proposed 123kV～765KV
The product of optical voltage/current transformer, the most successively in transformer station's linked network of the state such as Dutch, Belgian, Canadian and French
By test run；In March, 2000, Canada Nxtphase company reported the voltage transformer of 230kV electric pressure.State's interior focusing
Learn transformer research start from the eighties, successively have Tsing-Hua University, institute of the ministry of electronics industry 26, Beijing DianKeYuan, Shanghai mutual inductance device factory,
Shenyang Transformer Factory, Harbin Institute of Technology, Nan Rui, University On The Mountain Of Swallows, Deng Duojia scientific research institutions of the Central China University of Science and Technology carry out this
Research work, has the prototype design of multiple optical voltage transformer at present out, but the overwhelming majority is in laboratory stage.
Optical voltage transformer of the prior art exists that volume is relatively big, Heavy Weight, cost high, office puts phenomenon and proof voltage etc. and asks
Topic；And extra insulating Design need to be carried out, and therefore adding the potential safety hazard brought because of the factor such as pressure, humidity, it is long-term
Security, reliability can not get good guarantee.Additionally, existing optical voltage transformer is typically optical voltage sensing head
It is set directly in the plenum chamber at high voltage bus or high-field electrode place, plenum chamber is generally filled with the hexafluoro that heat endurance is high
Change sulphur gas, sulfur hexafluoride gas high pressure cause cut-off under electric arc and high temperature action can decomposed produce have corrosive
Analyte, can be to parts erosion damage, and the especially erosion to siliceous (Si) material is more serious, and optical voltage sensing
The optical fiber main component that quartz crystal device in Tou connects is silica (SiO2), therefore optical sensing head is arranged on containing high pressure six
The electric field of sulfur fluoride gas can bring serious potential safety hazard.Also having optical voltage transformer is with high by optical voltage sensing head
Plenum chamber is isolated and is the low pressure of suspension electrode by arranging suspension electrode by the high pressure converted of high-field electrode, such as Patent No.
201110288619.3, the patent of invention of entitled suspension electrode type optical voltage transformer, through suspension electrode will sensing convert
The electric field that low pressure produces is applied on optical voltage sensing head, and the light phase that can weaken the quartz crystal device in optical voltage sensing head becomes
Change, and then affect the certainty of measurement of optical voltage transformer.And, the impact of the geomery of suspension electrode and in maintenance and
Security performance during operation cannot be protected, and needs to be equipped with earthing rod, and earthing rod must be unsettled in use, in inspection
When repairing, the necessary ground connection of earthing rod, this not only adds operating procedure, also bring potential safety hazard.For this reason, it may be necessary to design one
Novel passive optical voltage transformer.
Summary of the invention
The present invention is directed to that the volume that existing optical voltage transformer exists is relatively big, Heavy Weight, cost high, safety and reliability
Poor and that certainty of measurement is low problem, it is provided that a kind of sensor-type optical voltage transformer of novel high pressure, at optical voltage sensing head
High voltage electric field can also be applied on optical voltage sensing head in the case of isolating with plenum chamber, it is possible to increase certainty of measurement,
Having that volume is little, lightweight, good insulation preformance, shield effectiveness good, application mode is flexible, the advantage that security is high.
Technical scheme is as follows:
A kind of sensor-type optical voltage transformer of high pressure, it is characterised in that include insulator (1), high-field electrode (2), mutual inductance
Device housing (3), seal (4), sealing ring (5), transformer outer cover (6), optical voltage sensing head (7), optical fiber (8)
With electric unit (9)；Described insulator (1) is fixedly connected on one end of described transformer housing (3)；Described high-field electrode
(2) fix even in described transformer housing (3) is stretched into by described insulator (1) in one end and with described insulator (1)
Connect；Described transformer housing (3) other end is fixing connects described seal (4), the upper surface of described seal (4)
Internal with transformer housing (3) communicating, the lower surface of seal (4) communicates with inside transformer outer cover (6), described mutually
Sensor outer cover (6) is fixing with transformer housing (3) or seal (4) to be connected, at transformer outer cover (6) and transformer
The position that housing (3) or seal (4) connect arranges sealing ring (5)；Described optical voltage sensing head (7) is placed in described
Bottom in transformer outer cover (6), the optical fiber (8) being connected with optical voltage sensing head (7) is drawn out to described transformer outer cover
(6) electric unit (9) in outside.
Described transformer outer cover (6) is fixing with transformer housing (3) to be connected, and described seal (4) is arranged on outside transformer
The position that cover (6) is connected with transformer housing (3).
Described seal (4) is flat insulation system or benzvalene form insulation system.
The electric pressure of the sensor-type optical voltage transformer of described high pressure is 110KV, described high-field electrode (2) and transformer shell
Distance between body (3) is 8cm 12cm, and the distance between described high-field electrode (2) and seal (4) is 8cm
10cm, the distance between described optical voltage sensing head (7) and seal (4) is 2cm 5cm.
Quartz crystal device in described optical voltage sensing head (7) contacts with the bottom in described transformer outer cover (6).
It is filled with insulating gas in described transformer housing (3).
Described insulating gas is SF6Gas.
Also include the GIS tank body of transformer station, the GIS tank ground of described transformer station, the GIS tank body of described transformer station and mutual inductance
Device housing (3) is connected.
Described optical voltage sensing head (7) includes the first fiber optic collimator mirror (101), the first devating prism (111), quarter wave plate
(12), BGO crystal (13), 45 ° of reflecting prisms (14), the second devating prism (112), the second fiber optic collimator mirror (102),
3rd devating prism (113), the 3rd fiber optic collimator mirror (103)；The optical signal sent from electric unit (9) passes through optical fiber through institute
It is connected to described first devating prism (111), quarter wave plate (12) after stating the first fiber optic collimator mirror (101), then sequentially passes through
Described BGO crystal (13), described 45 ° of reflecting prisms (14) are divided into two-way after being re-reflected into described BGO crystal (13),
One tunnel transmission end is the most electric by optical fiber output after described second devating prism (112), described second fiber optic collimator mirror (102)
Gas unit (9), another road reflection end leads to after described 3rd devating prism (113), described 3rd fiber optic collimator mirror (103)
Cross optical fiber to export to electric unit (9).
SLD light source (15), the first detector (16), the second detector (17) it is installed with in described electric unit (9)
With signal processing circuit (18), described SLD light source (15) and described first fiber optic collimator mirror (101) are by the first optical fiber (081)
Connecting, described first detector (16) and the second fiber optic collimator mirror (102) pass through the second optical fiber (082) and are connected, and described the
Two detectors (17) are connected by the 3rd optical fiber (083) with the 3rd fiber optic collimator mirror (103), described signal processing circuit (18)
All it is connected with the first detector (16) and the second detector (17).
The technique effect of the present invention is as follows:
The sensor-type optical voltage transformer of high pressure that the present invention provides, uses transformer housing, seal and transformer outer cover,
The upper surface of seal communicates with transformer enclosure interior, and the lower surface of seal communicates inside transformer outer cover, mutual inductance
Optical voltage sensing head is placed, it is achieved that optics electricity in there is in device housing the high voltage electric field that high-field electrode is formed, transformer outer cover
Pressure sensing head and primary side high-field electrode isolate, it is to avoid is arranged in plenum chamber optical voltage sensing head due to optical voltage
The optical fiber that the quartz crystal device of sensing head connects is etched the problem causing potential safety hazard, improves optical voltage sensing head and whole
The security performance of the sensor-type optical voltage transformer of high pressure.After high voltage electric field passes seal, then this high voltage electric field is applied to
On optical voltage sensing head, it is ensured that electric-field intensity, owing to the principle of optical voltage transformer is to cause optical voltage according to electric field
The light phase change inverse of the quartz crystal device of sensing head goes out voltage, and electric field is changing into direct ratio with light phase, therefore ensures electric-field intensity
Light phase change can be increased, thus improve the signal to noise ratio that the circuit in the electric unit of rear end gathers, improve optical voltage mutual inductance
The accuracy of measurement of device, it is to avoid the electric field that the low pressure that prior art uses suspension electrode sensing to convert produces is applied to optical voltage
The affected problem of certainty of measurement of optical voltage transformer is caused owing to low voltage electric field intensity is weak, due to without adopting on sensing head
Also avoid its problem that cannot be protected of security performance in maintenance and when running with suspension electrode, and the present invention without
Set up earthing rod on transformer outer cover, all decrease operating procedure when using and keep in repair, further increase security performance.This
The sensor-type optical voltage transformer of high pressure of invention, by arranging transformer housing, adds the effect of electromagnetic shielding；With optics side
Method measures the high pressure of ultra-high-tension power transmission line, without any skeletal support between high-field electrode and optical voltage sensing head, designs structure
Simply, eliminate the office that auxiliary support thing causes and put phenomenon and proof voltage problem, reduce potential safety hazard；High-field electrode and optics
Height between voltage sensor head can be adjusted according to different electric pressures, simplifies the complexity of system, design spirit
Live, simple, maintenance is easily installed, has that volume is little, lightweight, good insulation preformance, shield effectiveness good, application mode spirit
Live, the advantage that security is high.
Arrange that transformer outer cover and transformer housing are fixing to be connected, and seal is arranged on transformer outer cover and transformer housing company
The position connect so that the high voltage electric field in transformer housing reaches Electric Field Distribution in entering transformer outer cover through seal uniform,
And the intensity of high voltage electric field reaches maximum, it is possible to improve certainty of measurement further.
Seal is set to flat insulation system or benzvalene form insulation system, and this design the most easily realizes, it is possible to simplify system
Complexity；By arranging the distance between high-field electrode and transformer housing, seal and optical voltage sensing head and insulation
Distance between device so that high-field electrode keeps appropriate distance, to ensure transformer housing with transformer housing, seal
Interior safe distance and reasonable Electric Field Distribution；Optical voltage sensing head is being installed close proximity to seal, wants to obtain to meet
The electric-field intensity asked.
In transformer housing, fill insulating gas so that insulate further between high-field electrode and optical voltage sensing head, reduce
The potential safety hazard brought because of the factor such as pressure, humidity, simplifies the complexity of system and further increases security performance.
Accompanying drawing explanation
Fig. 1 is the first structural representation of the sensor-type optical voltage transformer of high pressure of the present invention.
Fig. 2 is the second structural representation of the sensor-type optical voltage transformer of high pressure of the present invention.
Fig. 3 is the third structural representation of the sensor-type optical voltage transformer of high pressure of the present invention.
Fig. 4 is the preferred structure schematic diagram of the optical voltage sensing head in the sensor-type optical voltage transformer of high pressure of the present invention.
In figure, each label lists as follows:
1-insulator；2-high-field electrode；3-transformer housing；4-seal；5-sealing ring；6-transformer outer cover；
7-optical voltage sensing head；8-optical fiber；081-the first optical fiber；082-the second optical fiber；083-the 3rd optical fiber；9-is electric
Unit；101-the first fiber optic collimator mirror；102-the second fiber optic collimator mirror；103-the 3rd fiber optic collimator mirror；111-first is inclined
Shake prism；112-the second devating prism；113-the 3rd devating prism；12-1/4 wave plate；13-BGO crystal；14-45 °
Reflecting prism；15-SLD light source；16-the first detector；17-the second detector；18-signal processing circuit.
Detailed description of the invention
The present invention will be described below in conjunction with the accompanying drawings.
The present invention relates to a kind of sensor-type optical voltage transformer of high pressure, three kinds of structures as Figure 1-3, including insulator 1,
High-field electrode 2, transformer housing 3, seal 4, sealing ring 5, transformer outer cover 6, optical voltage sensing head 7, optical fiber
8 and electric unit 9；Insulator 1 is fixedly connected on one end of described transformer housing 3, both abutting joints；High-field electrode 2
One end stretch into described transformer housing 3 by insulator 1 in and and described insulator 1 is fixing connects；Transformer housing 3 is another
One end is fixing connects described seal 4, and the upper surface of seal 4 is internal with transformer housing 3 to be communicated, seal 4
Lower surface and transformer outer cover 6 internal communicate, transformer outer cover 6 is fixed be connected with transformer housing 3 or seal 4,
The position being connected with transformer housing 3 or seal 4 at transformer outer cover 6 arranges sealing ring 5；Optical voltage sensing head 7
Being placed in the bottom in described transformer outer cover 6, the optical fiber 8 being connected with optical voltage sensing head 7 is drawn through transformer outer cover 6
To electric unit 9.
Wherein, transformer housing 3 fixes connection insulator 4, the upper surface of seal 4 phase internal with transformer housing 3
Logical it can be understood as be the bottom opening at transformer housing 3, seal 4 matches with this bottom opening, transformer shell
Body 3 is fixing two parts being connected with seal 4；It is of course also possible to one-body molded, now seal 4 is mutual inductance
The insulated part that the bottom of device housing 3 is had.
Transformer outer cover 6 is fixed be connected, according to transformer outer cover 6 and seal 4 with transformer housing 3 or seal 4
The difference of shape size, concrete connect the most different, transformer outer cover 6 is arranged with transformer housing 3 equipotential.Fig. 1
The first shown structure be the equivalent redius of transformer outer cover 6 less than the equivalent redius of seal 4, transformer outer cover 6 with
Seal 4 is fixing to be connected, and sealing ring 5 is arranged on the position that transformer outer cover 6 is connected with seal 4, arranges transformer
Outer cover 6 and transformer housing 3 equipotential；This first structure ensure that high voltage electric field in transformer housing 3 directly through
After seal 4 enters back in transformer outer cover 6, high voltage electric field can be uniformly distributed, and this equally distributed electric field is applied to
On optical voltage sensing head 7, it is ensured that the precision of follow-up measurement.The second structure shown in Fig. 2 is the equivalence of transformer outer cover 6
Radius is more than the equivalent redius of seal 4, and transformer outer cover 6 is fixing with transformer housing 3 to be connected, and now sealing ring 5 sets
Put the position being connected at transformer outer cover 6 with transformer housing 3, to ensure the air-tightness of transformer housing 3；This second is tied
Structure ensure that the high voltage electric field passing seal 4 in transformer housing 3 can fully enter in transformer outer cover 6, protects
The maximum intensity of the high voltage electric field in card transformer outer cover 6, this high voltage electric field is applied on optical voltage sensing head 7, Ke Yizeng
Add the light phase change of the quartz crystal device of optical voltage sensing head 7, thus improve the signal to noise ratio that back-end circuit gathers, improve optics
The accuracy of measurement of voltage transformer.The third structure shown in Fig. 3 is that the equivalent redius of transformer outer cover 6 is equal to seal
The equivalent redius of 4, now transformer outer cover 6 is fixing with transformer housing 3 is connected, and seal 4 is by chance arranged on transformer
The position that outer cover 6 is connected with transformer housing 3, and ensure air-tightness by being arranged on the sealing ring 5 of this link position；This is years old
Three kinds of structures are so that the high voltage electric field in transformer housing 3 enters the high-tension electricity in transformer outer cover 6 through seal 4
Field distribution is uniform, and the maximum intensity of the high voltage electric field in guarantee transformer outer cover 6, relatively first two structure, this third structure
Certainty of measurement can be improved further.
The sensor-type optical voltage transformer of high pressure of the present invention insulator 1 in the embodiment illustrated in figs. 1-3 is disc insulator, absolutely
Edge device 4 is flat insulation system, and certainly, seal 4 can also use other structure, as used benzvalene form insulation system
Etc., said structure the most easily realizes, it is possible to simplify the complexity of system, when seal 4 uses benzvalene form insulation system,
It is similar to the structure of the disc insulator that insulator 1 uses.High-field electrode 2 respectively with transformer housing 3 and seal 4 it
Between distance and optical voltage sensing head 7 and seal 4 between distance all sensor-type with high pressure optical voltage transformer
Electric pressure has direct relation, and the above-mentioned distance that such as electric pressure is arranged when 110kV, 220KV differs.If optics
The electric pressure of voltage transformer is 110KV, is preferably provided with the distance between high-field electrode 2 and transformer housing 3 at 8cm
Between 12cm, the distance between high-field electrode 2 and seal 4 is between 8cm 10cm so that high-field electrode 2 is with mutual
Sensor housing 3, seal 4 keep appropriate distance, to ensure the safe distance in transformer housing 3 and reasonable Electric Field Distribution；
Optical voltage sensing head 7 is being installed and should met, to obtain, the electric-field intensity required close proximity to seal 4, can arrange two
Distance between person is between 2cm 5cm.Optical fiber 8 is single-mode fiber, including first optical fiber the 081, second optical fiber 082 and
3rd optical fiber 083.
Being filled with insulating gas in transformer housing 3, this insulating gas can be SF6Gas.By in transformer housing 3
Fill insulating gas, can make to insulate further between high-field electrode 2 and optical voltage sensing head 7, reduce because of pressure, wet
The potential safety hazard that the factors such as degree are brought, simplifies the complexity of system and further increases security performance.The high pressure of the present invention passes
Sense formula optical voltage transformer can also include the GIS tank body of transformer station, arranges the GIS tank ground of transformer station, this transformer station
GIS tank body be connected with transformer housing 3, SF can also be filled in the GIS tank body of transformer station6Insulating gas.
Optical voltage sensing head 7 in the present invention is in power system primary system, power system refer to by generating, power transformation,
The electrical energy production of the link composition such as transmission of electricity, distribution and electricity consumption, the system transmitted, distribute and consume.By producing and distributing electric energy
Equipment, the system such as primary equipment compositions such as generator, transformer and breakers is primary system, by relay protection with safety certainly
Dynamic device, dispatching automation is electrical secondary system with the accessory system such as communicate.Electric unit 9 in the present invention is in power system two
In subsystem.The sensor-type optical voltage transformer of high pressure of the present invention is optical voltage mutual inductance based on Pockels electrooptic effect
Device, for passive optical voltage transformer.Pockels electrooptic effect refer to some crystalline material under DC Electric Field, its refraction
A kind of phenomenon that rate changes with extra electric field, also known as linear electro-optic effect.When a linearly polarized light is along at a direction incidence
During electro-optic crystal in extra electric field, after making line polarisation entrance crystal due to Pockels electrooptic effect, produce birefringence, so from
Two birefringence light beams of crystal outgoing just create phase delay, and this retardation is directly proportional to the intensity of extra electric field, has:In formula, E is the field intensity of the extra electric field residing for crystal, and k is the character with crystalline material and logical light wave appearance
The constant closed, V is the size of applied voltage, V on crystalπHalf-wave voltage for crystal (refers to be imitated by Pockels electric light
Birefringence two light beam that should cause produces the size of the applied voltage needed for 180 ° of differences),For being drawn by Pockels electrooptic effect
The phase difference of birefringence two light beam risen.By detection phase differenceCan be obtained by tested voltage, but in existing technical conditions
Under, it is impossible for will changing the phase place of light and carry out accurate directly measurement, and the method using polarized light interference here is passed through
Detect changed power after interference and calculate phase differenceThus calculate voltage V.
Optical voltage sensing head 7 in the sensor-type optical voltage transformer of high pressure of the present invention includes quartz crystal device, as used BGO brilliant
Body or other quartz crystal device, be preferably provided with this quartz crystal device and contact with the bottom in transformer outer cover 6.Can also be by BGO crystal
13 contact with the ground electrode of electric field in power system primary system, can arrange its contact surface with described ground electrode and be coated with chromium gold film,
May insure that on the good contact of BGO crystal and ground electrode, and BGO crystal, Electric Field Distribution is more uniform.Optical voltage passes
Sense 7 can be longitudinal modulation structure based on Pockels electrooptic effect or transverse modulation structure.Optical voltage shown in Fig. 4 passes
Sense 7 is the longitudinal modulation structure of Pockels electrooptic effect, mainly include first fiber optic collimator mirror the 101, first devating prism 111,
Quarter wave plate 12,13,45 ° of reflecting prism the 14, second devating prism 112, second fiber optic collimator mirrors 102 of BGO crystal,
Three devating prism the 113, the 3rd fiber optic collimator mirrors 103.The optical signal sent from electric unit 9 passes through the first optical fiber 081 through described
It is connected to described first devating prism 111, quarter wave plate 12 after first fiber optic collimator mirror 101, then it is brilliant to sequentially pass through described BGO
Body 13, described 45 ° of reflecting prisms 14 reflex to described BGO crystal 13 and are then divided into two-way, and a road transmission end is inclined through second
Shake and exported to electric unit 9 by the second optical fiber 082 after prism the 112, second fiber optic collimator mirror 102, another road reflection end warp
Exported to electric unit 9 by the 3rd optical fiber 083 after 3rd devating prism the 113, the 3rd fiber optic collimator mirror 103.
SLD light source the 15, first detector the 16, second detector 17 and signal processing circuit it is installed with in electric unit 9
18, SLD light sources 15 are connected by the first optical fiber 081 with the first fiber optic collimator mirror 101, the first detector 16 and the second optical fiber
Collimating mirror 102 is connected by the second optical fiber 082, and the second detector 17 and the 3rd fiber optic collimator mirror 103 are by the 3rd optical fiber 083
Connecting, signal processing circuit 18 is all connected with the first detector 16 and the second detector 17.
The course of work of the sensor-type optical voltage transformer of high pressure of the present invention: the incident light of the SLD light source 15 in electric unit 9
Reach the optical voltage sensing head 7 once held along the first optical fiber 081, through the first fiber optic collimator mirror 101, light be changed into directional light,
After the first devating prism 111, become linearly polarized light, then after quarter wave plate 12, become circularly polarized light, incide BGO
Crystal 13, due to BGO crystal 13.Reflect through 45 ° of reflecting prism 14 light, when voltage V is added to high-field electrode 2
After on, the high voltage electric field that the high-field electrode 2 in transformer housing 3 produces enters transformer outer cover 6 directly through seal 4
In, this high voltage electric field is evenly distributed and in the case of the intensity of the high voltage electric field ensured in transformer outer cover 6, by high voltage electric field
It is applied on the BGO crystal 13 of optical voltage sensing head 7, due to the effect of this high voltage electric field, by BGO crystal 13
Light produces birefringence, makes incident circularly polarized light become elliptically polarized light, produces a phase difference relevant to extra electric field, BGO
The emergent light of crystal 13 is divided into two-way, respectively through becoming the amplitude linearly polarized light by voltage modulated, a road after two devating prisms
Transmission end passes to the first detector 16 by the second optical fiber 082 after second devating prism the 112, second fiber optic collimator mirror 102,
Another road reflection end passes to the second detection by the 3rd optical fiber 083 after the 3rd devating prism the 113, the 3rd fiber optic collimator mirror 103
Device 17, the two ways of optical signals of the outgoing of optical voltage sensing head 7 is changed into by the first detector 16 and the second detector 17 respectively
The signal of telecommunication is also transferred to signal processing circuit 18 after collecting, signal processing circuit 18 carry out sliding average and weighted average
The calculating such as calculating process, according to the phase difference of detectionFinally give surveyed magnitude of voltage V.
The so-called GIS of the present invention, refers to gas-insulating and fully-enclosed combined electrical apparatus；GIS tank body refers to gas-insulating and fully-enclosed combination
The tank body of electrical equipment；SF6Gas refers to sulfur hexafluoride gas；BGO refers to bismuth germanium oxide Bi4Ge3O12；SLD refers to superradiance
Light emitting diode, i.e. Super Luminescent Diode.
It should be pointed out that, that the above detailed description of the invention can make those skilled in the art that the invention is more fully understood,
But limit the invention never in any form.Therefore, although the invention is entered by this specification referring to the drawings with embodiment
Gone detailed description, it will be understood by those skilled in the art, however, that still the invention can be modified or etc.
With replacing, in a word, all are without departing from the technical scheme of the spirit and scope of the invention and improvement thereof, and it all should be contained at this
In the middle of the protection domain of patented invention-creation.
Claims (10)
1. the sensor-type optical voltage transformer of high pressure, it is characterised in that include insulator (1), high-field electrode (2), mutually
Sensor housing (3), seal (4), sealing ring (5), transformer outer cover (6), optical voltage sensing head (7), optical fiber
And electric unit (9) (8)；Described insulator (1) is fixedly connected on one end of described transformer housing (3)；Described high pressure
One end of electrode (2) is also solid with described insulator (1) in stretching into described transformer housing (3) by described insulator (1)
Fixed connection；Described transformer housing (3) other end is fixing connects described seal (4), described seal (4) upper
Surface is internal with transformer housing (3) to be communicated, and the lower surface of seal (4) is internal with transformer outer cover (6) to be communicated, institute
State transformer outer cover (6) and transformer housing (3) or seal (4) is fixing is connected, at transformer outer cover (6) with mutual
The position that sensor housing (3) or seal (4) connect arranges sealing ring (5)；Described optical voltage sensing head (7) is placed in
Bottom in described transformer outer cover (6), the optical fiber (8) being connected with optical voltage sensing head (7) is drawn out to described transformer
The electric unit (9) in outer cover (6) outside；High voltage electric field in described transformer housing (3) is directly through seal (4)
Enter in transformer outer cover (6), then high voltage electric field is applied on optical voltage sensing head (7).
The sensor-type optical voltage transformer of high pressure the most according to claim 1, it is characterised in that described transformer outer cover (6)
Fixing with transformer housing (3) and be connected, described seal (4) is arranged on transformer outer cover (6) and transformer housing (3)
The position connected.
The sensor-type optical voltage transformer of high pressure the most according to claim 1 and 2, it is characterised in that described seal
(4) it is flat insulation system or benzvalene form insulation system.
The sensor-type optical voltage transformer of high pressure the most according to claim 1 and 2, it is characterised in that described high pressure senses
The electric pressure of formula optical voltage transformer is 110KV, the distance between described high-field electrode (2) and transformer housing (3)
For 8cm 12cm, the distance between described high-field electrode (2) and seal (4) is 8cm 10cm, described optics electricity
Distance between pressure sensing head (7) and seal (4) is 2cm 5cm.
The sensor-type optical voltage transformer of high pressure the most according to claim 1 and 2, it is characterised in that described optical voltage
Quartz crystal device in sensing head (7) contacts with the bottom in described transformer outer cover (6).
The sensor-type optical voltage transformer of high pressure the most according to claim 1 and 2, it is characterised in that described transformer shell
Body is filled with insulating gas in (3).
The sensor-type optical voltage transformer of high pressure the most according to claim 6, it is characterised in that described insulating gas is
SF6Gas.
The sensor-type optical voltage transformer of high pressure the most according to claim 1 and 2, it is characterised in that also include transformer station
GIS tank body, the GIS tank ground of described transformer station, the GIS tank body of described transformer station is connected with transformer housing (3).
The sensor-type optical voltage transformer of high pressure the most according to claim 1 and 2, it is characterised in that described optical voltage
Sensing head (7) includes the first fiber optic collimator mirror (101), the first devating prism (111), quarter wave plate (12), BGO crystal
(13), 45 ° of reflecting prisms (14), the second devating prism (112), the second fiber optic collimator mirrors (102), the 3rd devating prisms
(113), the 3rd fiber optic collimator mirror (103)；The optical signal sent from electric unit (9) is accurate through described first optical fiber by optical fiber
It is connected to described first devating prism (111), quarter wave plate (12) after straight mirror (101), then sequentially passes through described BGO crystal
(13), described 45 ° of reflecting prisms (14) be divided into two-way after being re-reflected into described BGO crystal (13), a road transmission end warp
Described second devating prism (112), described second fiber optic collimator mirror (102) are exported to electric unit (9) by optical fiber afterwards,
Another road reflection end after described 3rd devating prism (113), described 3rd fiber optic collimator mirror (103) by optical fiber export to
Electric unit (9).
The sensor-type optical voltage transformer of high pressure the most according to claim 9, it is characterised in that described electric unit (9)
Inside it is installed with SLD light source (15), the first detector (16), the second detector (17) and signal processing circuit (18),
Described SLD light source (15) is connected by the first optical fiber (081) with described first fiber optic collimator mirror (101), and described first visits
Survey device (16) to be connected by the second optical fiber (082) with the second fiber optic collimator mirror (102), described second detector (17) and
3rd fiber optic collimator mirror (103) is connected by the 3rd optical fiber (083), and described signal processing circuit (18) all detects with first
Device (16) and the second detector (17) connect.
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| CN103713175A (en) * | 2013-12-24 | 2014-04-09 | 北京航天时代光电科技有限公司 | Combined optical transformer for novel GIS |
| CN104597305B (en) * | 2015-01-07 | 2017-11-14 | 马鞍山万兆科技有限公司 | A kind of optical voltage transformer and its method for packing |
| CN108387775A (en) * | 2017-12-29 | 2018-08-10 | 长园深瑞继保自动化有限公司 | The sensor and its measurement method of electrical power are measured using light carrier |
| CN108802484B (en) * | 2018-06-21 | 2020-10-16 | 清华大学 | Gas-insulated real-time self-calibration broadband high-voltage measuring device |
| CN115389805B (en) * | 2022-09-02 | 2024-03-19 | 哈尔滨工业大学 | Series-parallel CVT broadband measurement system based on optical voltage sensor |
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| EP0882989A1 (en) * | 1997-06-06 | 1998-12-09 | GEC ALSTHOM T & D BALTEAU | Electro-optical sensing device with a voltage divider unit |
| CN102590575A (en) * | 2012-03-26 | 2012-07-18 | 成都创图科技有限公司 | Total reflection optical voltage transformer for transformer substation |
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| CN102928640A (en) * | 2011-09-26 | 2013-02-13 | 北京航天时代光电科技有限公司 | Suspension electrode type optical voltage transformer |
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| EP0882989A1 (en) * | 1997-06-06 | 1998-12-09 | GEC ALSTHOM T & D BALTEAU | Electro-optical sensing device with a voltage divider unit |
| CN102914677A (en) * | 2011-09-26 | 2013-02-06 | 北京航天时代光电科技有限公司 | Tank-type single-phase optical voltage transformer |
| CN102928640A (en) * | 2011-09-26 | 2013-02-13 | 北京航天时代光电科技有限公司 | Suspension electrode type optical voltage transformer |
| CN102590575A (en) * | 2012-03-26 | 2012-07-18 | 成都创图科技有限公司 | Total reflection optical voltage transformer for transformer substation |
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