CN102914678B - Tank-type tri-phase optical voltage transformer - Google Patents
Tank-type tri-phase optical voltage transformer Download PDFInfo
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- CN102914678B CN102914678B CN 201110288596 CN201110288596A CN102914678B CN 102914678 B CN102914678 B CN 102914678B CN 201110288596 CN201110288596 CN 201110288596 CN 201110288596 A CN201110288596 A CN 201110288596A CN 102914678 B CN102914678 B CN 102914678B
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Abstract
The invention discloses a tank-type tri-phase optical voltage transformer, which comprises an insulator, a GIS (gas insulated switchgear) cavity, and an optical voltage mutual inductance unit, wherein the insulator is arranged at one end of the GIS cavity; the optical voltage mutual inductance unit comprises a spreading conductor, a high-voltage electrode, a shielding barrel, an optical voltage sensing head, a probe, an optical fiber, a fiber airtight extractor, a probe supporter and an electric unit. The tank-type tri-phase optical voltage transformer is small in volume, light in weight, low in cost and good in shielding effect; the local discharge phenomena and the withstand voltage problem caused by the attached upholder are removed; an extra insulating design is not needed; potential safety hazards caused by the factors such as pressure and humidity are reduced; the complexity of the system is simplified; the tank-type tri-phase optical voltage transformer can adjust according to different voltage levels, and is flexible and simple in design, and easy to install and maintain.
Description
Technical field
The present invention relates to electrical equipment technical field, relate in particular to a kind of tank type three phase optical voltage transformer (VT).
Background technology
High-voltage electric mutual inductor is for electric system is provided for measuring, the necessaries of control and relay protection.Along with voltage class of electric power system improve constantly, optical voltage transformer has shown advantage than conventional voltage mutual inductor at aspects, such as the high-voltage signal of optical voltage transformer arrives secondary device by Optical Fiber Transmission, insulation is simplified greatly, frequency response is wide, dynamic range is large, without magnetic saturation, lightly be easy to install etc., therefore, the application of optical voltage transformer in electric system enjoys attention.
In the world, 1997, ABB electric power T﹠amp; D company has reported 115kV～550kV combined type optical voltage/current transformer.1997, French Alstom reported 123kV～765kV combined type optical voltage/current transformer, and existing many products are at Europe and North America hanging net operation.2003, Canadian Nxtphase reported the optical voltage transformer of 121kV～550kV.Domestic successively have numerous units such as the colleges and universities such as Tsing-Hua University, the Central China University of Science and Technology and 26 of the ministrys of electronics industry, Electric Power Research Institute, mutual inductance device factory, Shanghai to be engaged in this respect research from beginning in 1992; at present existing multiple optical voltage transformer prototype design out only limits to testing laboratory's stage but count absolutely greatly.
And optical voltage transformer of the prior art exists, and volume is large, Heavy Weight, cost are high, the problems such as phenomenon and proof voltage are put in office; And need carry out extra insulating Design, therefore increased the potential safety hazard of bringing because of factors such as pressure, humidity.
Summary of the invention
Technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, a kind of tank type three phase optical voltage transformer (VT) is provided, volume is little, lightweight, shield effectiveness is good, and application mode is flexible.
Another technology of the present invention is dealt with problems and is: eliminated the office that attached stilt causes and put phenomenon and proof voltage problem, reduced potential safety hazard, simplified the complexity of system, easily installation and maintenance and guaranteed compressive strength and the insulating property of generalized information system.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is as follows: tank type three phase optical voltage transformer (VT) comprises insulator (1), GIS cavity (4), optical voltage mutual inductance unit and electric unit (12); Described insulator (1) is arranged on an end of described GIS cavity (4); Described optical voltage mutual inductance unit is totally three covers, be respectively A, B, C three-phase, be arranged in GIS cavity (4), every cover optical voltage mutual inductance unit comprises expansion conductor (2), high-field electrode (3), shielding cylinder (5), optical voltage sensing head (7), probe (8), optical fiber (9), the airtight ejector of optical fiber (10) and probe support (11);
Described expansion conductor (2) one ends are fixedly connected with described insulator (1), and the other end is fixedly connected with described high-field electrode (3); Described shielding cylinder (5) is arranged on the interior end relative with described insulator (1) in described GIS cavity (4) bottom; The free end of described high-field electrode (3) stretches in described shielding cylinder (5);
Have the mounting hole for fixed optics voltage sensor head (7), probe (8) and probe support (11) in the bottom of described GIS cavity (4), optical voltage sensing head (7), probe (8) and probe support (11) are loaded in GIS cavity (4) by mounting hole, then with the airtight ejector of optical fiber (10) and the docking of GIS cavity (4) sealed bottom, so that the mounting hole sealing; Probe (8) and optical voltage sensing head (7) are arranged in described shielding cylinder (5), and the airtight ejector of optical fiber (10) is positioned at outside GIS cavity (3); Probe support (11) bottom is fixedly connected with the airtight ejector of optical fiber (10), probe (8) is housed on probe support (11), described optical voltage sensing head (7) is positioned at the position corresponding with the other end of described high-field electrode (3), the upper plane of described probe (8), and described high-field electrode (3) maintains distance with described optical voltage sensing head (7); The optical fiber (9) that is connected with optical voltage sensing head (4) leads to described electric unit (12) by the airtight ejector of optical fiber (10).
Above-mentioned tank type three phase optical voltage transformer (VT) also comprises inflation and the valve of giving vent to anger (6), and described inflation and the valve of giving vent to anger (6) are communicated with described GIS cavity (4); Also comprise blow-out disc (14), described blow-out disc (14) is communicated with described GIS cavity (4); Also comprise fiber optic protection box (13), the airtight ejector of optical fiber (10) is drawn out to described fiber optic protection box (11), then causes described electric unit (12).
Described insulator (1) is fixed on the top of GIS cavity (4), and probe (8) is arranged on the top of probe support (11), and optical voltage sensing head (7) is placed in the center of probe (8) top surface.
Described insulator (1), described expansion conductor (2), described high-field electrode (3) are equipotential, and described shielding cylinder (5), described GIS cavity (4) are that equipotential is communicated with ground electrode.
Described expansion conductor (2) can be adjusted, described high-field electrode (3) is fixed on described expansion conductor (2), adjusts described expansion conductor (2) and just can regulate described high-field electrode (3) and be positioned at the center on described shielding cylinder (4) face of cylinder or depart from described center.
Described high electrode (3) is positioned at the center on described shielding cylinder (4) face of cylinder.
Described high-field electrode (3) can be adjusted according to different electric pressures from the height between described optical voltage sensing head (7), in order to can accurately measure.
Described optical voltage sensing head (7) comprises the first optical fiber collimator (171), the polarizer (18), quarter wave plate (19), BGO crystal (20), analyzer (21), the second optical fiber collimator (172) and the 3rd optical fiber collimator (173); the light signal that comes from electric unit (12) is connected to the described polarizer (18) after described the first optical fiber collimator (171) by optical fiber, pass through successively more described quarter wave plate (19) after the described polarizer (18), described BGO crystal (20) is connected to described analyzer (21), be divided into two-way after described analyzer (21), one road reflection end exports electric unit (12) to by optical fiber after described the second optical fiber collimator (172), another Reuter penetrates end and export electric unit (12) to by optical fiber after described the 3rd optical fiber collimator (173).
Described electric unit (12) comprises optics close-loop feedback control module (15) and signal processing unit (16); Optics close-loop feedback control module (15) makes the centre wavelength of light source stable, exports optical voltage sensing head (4) to through optical fiber (9); Signal processing unit (16) is processed the light signal of optical voltage sensing head (7) output, demodulates tested voltage.
Described optics close-loop feedback control module (15) comprises SLD light source (22), Lyot depolarizer (23), coupling mechanism (24), the first detector (251) and driving circuit (27); The light that SLD light source (22) produces becomes low polarized light through Lyot depolarizer (23), exports optical voltage sensing head (7) to through coupling mechanism (24); The simultaneously output of coupling mechanism (24) becomes after electric signal light signal to driving circuit (27) through the first detector (251), judged whether to satisfy the requirement of Output optical power by driving circuit (27), calculate and adjust drive circuitry parameter, feed back to SLD light source (22), make the luminous power of SLD light source (22) stable output, to export the light source output power of optical voltage sensing head (7) to by coupling mechanism (24) stable thereby make.
Described signal processing unit (16) comprises the second detector (252), the 3rd detector (253) and signal demodulating circuit (26); the second detector (252), the 3rd detector (253) changes the two ways of optical signals of optical voltage sensing head (7) outgoing into electric signal transmission to described signal demodulating circuit (28) respectively, calculate respectively the second detector (252) by signal demodulating circuit, the sliding average of (253) two detection channels of the 3rd detector, the current ratio DC quantity, then the two-way detectable signal is weighted average computation, make the two-way voltage magnitude reach balance, at last the three-phase voltage value of gained is carried out sending by serial ports after framing according to communication protocol.
the optical fiber outbound course of the airtight ejector of described optical fiber (10) adopts optical fiber metallization packaged technology, the airtight ejector of described optical fiber (10) comprises metallized optical fibre (29), metal tube (30), O-ring seal (31), optical fiber is drawn flange (32) and optical fiber reach through hole (33), described optical fiber is drawn and is had described optical fiber reach through hole (33) on flange (32), described metal tube (30) passes sealing between described optical fiber reach through hole (33) and described metal tube (30) and described optical fiber reach through hole (33), described metallized optical fibre (29) passes sealing between described metal tube (30) and described metallized optical fibre (29) and described metal tube (30), described sealed picture (31) is embedded in described optical fiber and draws on the sealing surface of flange (32) and around described optical fiber reach through hole (33) and arrange,
Beneficial effect of the present invention is as follows:
(1) in the present invention, optical voltage sensing head directly is positioned in the GIS cavity by probe, probe support, the airtight ejector of optical fiber, and application mode is flexible, volume is little, lightweight, cost is low;
(2) in the present invention, optical voltage sensing head directly is positioned in the GIS cavity, and shield effectiveness is good;
(3) need not any skeleton between mesohigh electrode of the present invention and optical voltage sensing head and support, project organization is simple, has eliminated the office that attached stilt causes and has put phenomenon and proof voltage problem;
(4) directly adopt SF6 gas-insulated in the GIS cavity between mesohigh electrode of the present invention and optical voltage sensing head, need not to carry out extra insulating Design, reduced the potential safety hazard of bringing because of factors such as pressure, humidity, simplified the complexity of system;
(5) mesohigh electrode of the present invention can be adjusted according to different electric pressures from the height between optical voltage sensing head, flexible design, simple, easily installation and maintenance;
(6) in the present invention, the optical fiber outbound course of the airtight ejector of optical fiber adopts optical fiber metallization packaged technology, this technology has been avoided the optical fiber exit Leakage Gas that causes because of draught head that GIS cavity and external environment exist, has guaranteed compressive strength and the insulating property of generalized information system;
(7) in the present invention shielding cylinder adopt resistivity less than 90, linear expansion coefficient is less than the material preparation of 24.0 * 10-6/K, as aluminium alloy, copper etc., this kind material is nonmagnetic, good conductivity, has guaranteed the equipotential relation of the electric shield of shielding cylinder functional and shielding cylinder and ground electrode.
Description of drawings
Shown in Figure 1 is structure principle chart of the present invention;
Shown in Figure 2 is optical voltage sensing head and electric unit structural drawing in the present invention;
Shown in Figure 3 is the airtight ejector structure of optical fiber cut-open view in the present invention;
Shown in Figure 4 is drive circuit works process flow diagram in the present invention;
Signal demodulating circuit workflow diagram in the present invention shown in Figure 5.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the embodiment of the present invention comprises: insulator 1, GIS cavity 4, expansion conductor 2, high-field electrode 3, shielding cylinder 5, probe 8, probe support 11, optical voltage sensing head 7, optical fiber 9, the airtight ejector 10 of optical fiber, fiber optic protection box 13, electric unit 12, blow-out disc 14, the valve 6 of inflating and give vent to anger.
Insulator 1 is disc insulator, in be filled with SF6 gas, insulator 1 is arranged on the upper end of described GIS cavity 4.Optical voltage mutual inductance unit is totally three covers, be respectively A, B, C three-phase, be arranged in GIS cavity 4, every cover optical voltage mutual inductance unit includes expansion conductor 2, high-field electrode 3, shielding cylinder 5, optical voltage sensing head 7, probe 8, optical fiber 9, the airtight ejector 10 of optical fiber and probe support 11.Insulator 1 is fixed on the top of GIS cavity 4, in insulator 1, the high-pressure conductive bus of cast is connected successively with expansion conductor 2, high-field electrode 3, high-field electrode 3 is adjusted to the center on shielding cylinder 5 faces of cylinder by expansion conductor 2, and maintain a certain distance with probe 8 upper surfaces, wherein, insulator 1, expansion conductor 2, high-field electrode 3 are equipotential, and shielding cylinder 5 and GIS cavity 4 are that equipotential is communicated with ground electrode.Shielding cylinder 5 is arranged on an end relative with insulator 1 in GIS cavity 4 bottoms, and the free end of high-field electrode 3 stretches in described shielding cylinder 5.
Have in the bottom of GIS cavity 4 be used to three mounting holes fixing three cover optical voltage sensing heads 7, probe 8 and probe support 11, three cover optical voltage sensing heads 7, probe 8 and probe support 11 are loaded in GIS cavity 4 by three mounting holes respectively, then three airtight ejectors 10 of optical fiber are docked with GIS cavity 4 sealed bottoms respectively, so that three mounting holes sealings.Optical voltage sensing head 7, probe 8, probe support 11 is loaded in GIS cavity 4 by mounting hole, pop one's head in simultaneously 8 and optical voltage sensing head 7 be arranged in shielding cylinder 5.The airtight ejector 10 of optical fiber is positioned at outside GIS cavity 3; Probe support 11 bottoms are fixedly connected with the airtight ejector 10 of optical fiber, and probe 8 is arranged on the top of probe support 11; Optical voltage sensing head 7 be connected to the probe 8 top surfaces the center, and optical voltage sensing head 7 and pop one's head between 8 surfaces connected mode for the bonding; The optical fiber 9 that is connected with optical voltage sensing head 4 leads to described electric unit 12 by the airtight ejector 10 of optical fiber, and electric unit 12 is connected with main control computer or the merge cells of rear end.
The rear high-field electrode 3 that powers on induces also electric field, and optical voltage sensing head 7 detects phase differential according to the Pockels electrooptical effect, exports electric unit 12 to by optical fiber 9.
GIS of the present invention refers to gas-insulated switch; So-called GIS cavity refers to the gas-insulated switch cavity.SF6 of the present invention refers to sulfur hexafluoride.BGO is bismuth germanium oxide Bi4Ge3O12; SLD is super-radiance light emitting diode, i.e. Super Luminescent Diode.Insulator 1 in the present invention is disc insulator; Optical fiber 9 is single-mode fiber, comprises the first optical fiber 91, the second optical fiber 92 and the 3rd optical fiber 93.GIS cavity in the embodiment of the present invention is single-phase type 220kV structure, and high-field electrode 3 is about 100mm to the distance of optical voltage sensing head 7, if the GIS cavity is single-phase type 110kV structure, high-field electrode 3 is about the 70mm left and right to the distance of optical voltage sensing head 7.In order to ensure compressive strength and the insulating property of GIS cavity, through test, the airtight ejector 8 of optical fiber can bear 20 atmospheric pressure, satisfies the requirement of the interior SF6 air pressure of GIS cavity 1 fully.Probe 8 and the material of probe support 11 are metal, as aluminium alloy etc.
Optical voltage sensing head 7 in the present invention is in the primary system of electric system, and electric system refers to the system of the electrical energy production, transmission, distribution and the consumption that are comprised of links such as generating, power transformation, transmission of electricity, distribution and electricity consumptions.By the equipment of Matter production and allocation electric energy, the system that forms as primary equipments such as generator, transformer and isolating switchs is primary system.By relay protection and automatic safety device, dispatching automation is electrical secondary system with the backup system such as communicate by letter.Electric unit 12 is arranged in the electrical secondary system of electric system.
As shown in Figure 1, the optical voltage sensing head in the present invention 7 by pop one's head in 8, probe support 11 directly is positioned in GIS cavity 4; Need not any skeleton between high-field electrode 3 and optical voltage sensing head 7 supports; Directly adopt the SF6 gas-insulated in GIS cavity 4 between high-field electrode 3 and optical voltage sensing head 7, need not to carry out extra insulating Design; High-field electrode 3 can be adjusted according to different electric pressures from the height between optical voltage sensing head 7; Optical fiber 9 outbound courses of the airtight ejector 10 of optical fiber adopt optical fiber metallization packaged technology; Shielding cylinder 5 adopt resistivity less than 90, linear expansion coefficient is less than the material preparation of 24.0 * 10-6/K, as aluminium alloy, copper etc.
As shown in Figure 2, optical voltage sensing head 7 of the present invention comprises the first optical fiber collimator 171, the polarizer 18, quarter wave plate 19, BGO crystal 20, analyzer 21, the second optical fiber collimator 172 and the 3rd optical fiber collimator 173.Be connected to the described polarizer 18 by the first optical fiber 91 from the light signal of optics close-loop feedback control module 15 after described the first optical fiber collimator 171, be connected to described analyzer 21 through described quarter wave plate 19, described BGO crystal 20 successively again after the described polarizer 18, be divided into two-way after described analyzer 21, one road reflection end exports signal processing unit 16 through described the second optical fiber collimator 172 to by the second optical fiber 92, and another Reuter penetrates end and exports signal processing unit 16 through described the 3rd optical fiber collimator 173 to by the 3rd optical fiber 93.
the principle of work of optical voltage sensing head 7: the incident light of the optics close-loop feedback control module 15 from electric unit 12 is by the first optical fiber 91, become linearly polarized light after the polarizer 18, produce again the linearly polarized light of pairwise orthogonal through quarter wave plate 19, effect due to Pockels effect in BGO crystal 20, two bunch polarized lights are after 0 transmission of BGO crystal 2, produce a phase differential relevant to extra electric field, utilizing analyzer 21 that two bunch polarized lights are produced interferes, phase-detection is become light intensity to be detected, two-way emergent light with BGO crystal 20 changes into intensity variation by analyzer 21 by the phase place variation at last, respectively through the second optical fiber collimator 172, the 3rd optical fiber collimator 173 exports the signal processing unit 16 in electric unit 12 to, can utilize this moment the Pockels electrooptical effect to detect the size of the electric field that adds high pressure.
BGO crystal 20 contacts with ground electrode in electric system, and the surface of contact of BGO crystal 18 and ground electrode is coated with chromium gold film, can guarantee the good contact of BGO crystal and ground electrode, and on BGO crystal 20, Electric Field Distribution is more even.The polarizer 18 and quarter wave plate 19 adopt integrated processing technology to make, and have greatly reduced the thickness of quarter wave plate, thereby have slackened the impact of quarter wave plate temperature performance on system.
As shown in Figure 3, optical fiber 9 outbound courses of the airtight ejector 10 of optical fiber of the present invention adopt optical fiber metallization packaged technology.the airtight ejector 10 of optical fiber comprises metallized optical fibre 29, metal tube 30, O-ring seal 31, optical fiber is drawn flange 32 and optical fiber reach through hole 33, described optical fiber is drawn and is had described optical fiber reach through hole 33 on flange 32, described metal tube 30 passes sealing between described optical fiber reach through hole 33 and described metal tube 30 and described optical fiber reach through hole 33, described metallized optical fibre 29 passes sealing between described metal tube 30 and described metallized optical fibre 29 and described metal tube 30, described O-ring seal 31 is embedded in that described optical fiber is drawn on the sealing surface of flange 32 and arranges around described optical fiber reach through hole 33.
As shown in Figure 2, electric unit 12 comprises optics close-loop feedback control module 15 and signal processing unit 16.Optics close-loop feedback control module 15 makes the centre wavelength of light source stable, exports optical voltage sensing head 7 to through the first optical fiber 91; The two ways of optical signals of 16 pairs of optical voltage sensing heads of signal processing unit, 7 outputs is processed, and demodulates tested voltage.The present invention has increased optics close-loop feedback control module 15 in electric unit 12, can make SLD light source 22 output powers more stable, effectively control the drift phenomenon of the centre wavelength of SLD light source 22, prevention causes output power to descend because SLD light source 22 is aging problem.
As shown in Figure 2, optics close-loop feedback control module 15 comprises SLD light source 22, Lyot depolarizer 23, coupling mechanism 24, the first detector 251 and driving circuit 27.The light that SLD light source 22 produces becomes low polarized light through Lyot depolarizer 23, exports optical voltage sensing head 7 to through coupling mechanism 24; The simultaneously output of coupling mechanism 24 becomes after electric signal light signal to driving circuit 27 through the first detector 251, judged whether to satisfy the requirement of Output optical power by driving circuit 27, calculate and adjust drive circuitry parameter, feed back to SLD light source 22, make the luminous power of SLD light source 22 stable outputs, to export the light source output power of optical voltage sensing head 7 to by coupling mechanism 24 stable thereby make.The present invention increased the Lyot depolarizer in optics close-loop feedback control module 15, eliminated the luminous power that the light path polarization state causes by the factors such as temperature, fiber-optic vibration and fluctuateed, and is conducive to the reliable and stable of light path system.
as shown in Figure 4, the workflow of the driving circuit 27 in the present invention: after the driving circuit energising, SLD light source 22 is luminous, with variation of ambient temperature and luminously cause that SLD light source 22 die temperatures raise, SLD light source 22 luminous powers unstable, cause the unstable of centre wavelength, the final measuring accuracy that affects optical voltage transformer, whether measure luminous power by the first detector 251 meets the demands, as not meeting the demands, can regulate SLD light source 22 luminous powers in the scope of regulation by regulating drive current, thereby improve the reliability of luminous power and centre wavelength.
As shown in Figure 2, signal processing unit 16 comprises the second detector 252, the 3rd detector 253 and signal demodulating circuit 28.The second optical fiber collimator 172 is connected to signal demodulating circuit 28, the three optical fiber collimators 173 by the second optical fiber 92 through described the second detector 252 and is connected to signal demodulating circuit 28 by the 3rd optical fiber 93 through the 3rd detector 253.The second detector 252, the 3rd detector 253 change the two ways of optical signals of the outgoing of optical voltage sensing head 7 into electric signal respectively and gather after be transferred to described signal demodulating circuit 28, calculated respectively the sliding average of two detection channels by signal demodulating circuit 28, the current ratio DC quantity, be weighted average computation, make the two-way voltage magnitude reach balance, at last gained three-phase voltage value is extremely carried out sending by serial ports after framing according to communication protocol.
as shown in Figure 5, the workflow of signal demodulating circuit 28: A in the present invention, B, C three-phase data are calculated simultaneously equally, the signal demodulating circuit 28 rear generation negative edge pulse that powers on, the signal demodulating circuit rear generation negative edge pulse that powers on, gather the two paths of signals (comprising DC quantity and of ac) of the second detector 252 and the 3rd detector 253 outputs, carry out averaging after AD changes and be saved in buffer memory, to DC quantity wherein, calculate respectively the complete cycle wave datum sliding average (namely the signal of surveying being rounded several cycles) of two passages, DC quantity with two channel measurements is saved in buffering again, then the current ratio DC quantity of calculating two passages that the second detector 252 passages and the second detector 253 survey (deducts respectively DC quantity with the two paths of signals of the second detector 252 and the 3rd detector 253 outputs and is of ac, then carrying out of ac calculates than DC quantity), be weighted average computation, make the two-way amplitude reach balance, at last again with A, B, C three-phase gained magnitude of voltage carries out sending by serial ports after framing according to communication protocol.
In a word, volume of the present invention is little, lightweight, cost is low; Shield effectiveness is good; Eliminate the office that attached stilt causes and put phenomenon and proof voltage problem; Need not to carry out extra insulating Design, reduced the potential safety hazard of bringing because of factors such as pressure, humidity, simplified the complexity of system; Can adjust according to different electric pressures flexible design, simple, easily installation and maintenance.
The non-elaborated part of the present invention belongs to techniques well known.
More than by the detailed description of concrete and preferred embodiment the present invention; but those skilled in the art should be understood that; the present invention is not limited to the above embodiment; within the spirit and principles in the present invention all; any modification of doing, be equal to replacement etc., within protection scope of the present invention all should be included in.
Claims (21)
1. tank type three phase optical voltage transformer (VT), is characterized in that: comprise insulator (1), GIS cavity (4), optical voltage mutual inductance unit and electric unit (12); Described insulator (1) is arranged on an end of described GIS cavity (4); Described optical voltage mutual inductance unit is totally three covers, be respectively A, B, C three-phase, be arranged in GIS cavity (4), every cover optical voltage mutual inductance unit comprises expansion conductor (2), high-field electrode (3), shielding cylinder (5), optical voltage sensing head (7), probe (8), optical fiber (9), the airtight ejector of optical fiber (10) and probe support (11);
Described expansion conductor (2) one ends are fixedly connected with described insulator (1), and the other end is fixedly connected with described high-field electrode (3); Described shielding cylinder (5) is arranged on the interior end relative with described insulator (1) in described GIS cavity (4) bottom; The free end of described high-field electrode (3) stretches in described shielding cylinder (5);
Have the mounting hole for fixed optics voltage sensor head (7), probe (8) and probe support (11) in the bottom of described GIS cavity (4), optical voltage sensing head (7), probe (8) and probe support (11) are loaded in GIS cavity (4) by mounting hole, then with the airtight ejector of optical fiber (10) and the docking of GIS cavity (4) sealed bottom, so that the mounting hole sealing; Probe (8) and optical voltage sensing head (7) are arranged in described shielding cylinder (5), and the airtight ejector of optical fiber (10) is positioned at outside GIS cavity (3); Probe support (11) bottom is fixedly connected with the airtight ejector of optical fiber (10), probe (8) is housed on probe support (11), described optical voltage sensing head (7) is positioned at the position corresponding with the free end of described high-field electrode (3), the upper plane of described probe (8), and described high-field electrode (3) maintains distance with described optical voltage sensing head (7); The optical fiber (9) that is connected with optical voltage sensing head (4) leads to described electric unit (12) by the airtight ejector of optical fiber (10).
2. tank type three phase optical voltage transformer (VT) according to claim 1 is characterized in that: also comprise inflation and the valve of giving vent to anger (6), described inflation and the valve of giving vent to anger (6) are communicated with described GIS cavity (4).
3. tank type three phase optical voltage transformer (VT) according to claim 1, it is characterized in that: also comprise blow-out disc (14), described blow-out disc (14) is communicated with described GIS cavity (4).
4. tank type three phase optical voltage transformer (VT) according to claim 1, it is characterized in that: also comprise fiber optic protection box (13), the airtight ejector of optical fiber (10) is drawn out to described fiber optic protection box (11), then causes described electric unit (12).
5. according to claim 1-3 one of any described tank type three phase optical voltage transformer (VT), it is characterized in that: described insulator (1) is fixed on the top of GIS cavity (4), probe (8) is arranged on the top of probe support (11), and optical voltage sensing head (7) is placed in the center of probe (8) top surface.
6. according to claim 1-4 one of any described tank type three phase optical voltage transformer (VT), it is characterized in that: described insulator (1), described expansion conductor (2), described high-field electrode (3) are equipotential, and described shielding cylinder (5), described GIS cavity (4) are that equipotential is communicated with ground electrode.
7. according to claim 1-4 one of any described tank type three phase optical voltage transformer (VT), it is characterized in that: described expansion conductor (2) can be adjusted, described high-field electrode (3) is fixed on described expansion conductor (2), adjusts described expansion conductor (2) and just can regulate described high-field electrode (3) and be positioned at the center on described shielding cylinder (4) face of cylinder or depart from described center.
8. tank type three phase optical voltage transformer (VT) according to claim 7, it is characterized in that: described high-field electrode (3) is positioned at the center on described shielding cylinder (4) face of cylinder.
9. according to claim 1-4 one of any described tank type three phase optical voltage transformer (VT), it is characterized in that: described high-field electrode (3) can be adjusted according to different electric pressures from the distance between described optical voltage sensing head (7).
10. according to claim 1-4 one of any described tank type three phase optical voltage transformer (VT), it is characterized in that: described optical voltage sensing head (7) comprises the first optical fiber collimator (171), the polarizer (18), quarter wave plate (19), BGO crystal (20), analyzer (21), the second optical fiber collimator (172) and the 3rd optical fiber collimator (173); The light signal that comes from electric unit (12) is connected to the described polarizer (18) after described the first optical fiber collimator (171) by optical fiber, pass through successively more described quarter wave plate (19) after the described polarizer (18), described BGO crystal (20) is connected to described analyzer (21), be divided into two-way after described analyzer (21), one road reflection end exports electric unit (12) to by optical fiber after described the second optical fiber collimator (172), another Reuter penetrates end and export electric unit (12) to by optical fiber after described the 3rd optical fiber collimator (173).
11. according to claim 1-4 one of any described tank type three phase optical voltage transformer (VT), it is characterized in that: described electric unit (12) comprises optics close-loop feedback control module (15) and signal processing unit (16); Optics close-loop feedback control module (15) makes the centre wavelength of light source stable, exports optical voltage sensing head (4) to through optical fiber (9); Signal processing unit (16) is processed the light signal of optical voltage sensing head (7) output, demodulates tested voltage.
12. tank type three phase optical voltage transformer (VT) according to claim 11 is characterized in that: described optics close-loop feedback control module (15) comprises SLD light source (22), Lyot depolarizer (23), coupling mechanism (24), the first detector (251) and driving circuit (27); The light that SLD light source (22) produces becomes low polarized light through Lyot depolarizer (23), exports optical voltage sensing head (7) to through coupling mechanism (24); The simultaneously output of coupling mechanism (24) becomes after electric signal light signal to driving circuit (27) through the first detector (251), judged whether to satisfy the requirement of Output optical power by driving circuit (27), calculate and adjust drive circuitry parameter, feed back to SLD light source (22), make the luminous power of SLD light source (22) stable output, to export the light source output power of optical voltage sensing head (7) to by coupling mechanism (24) stable thereby make.
13. tank type three phase optical voltage transformer (VT) according to claim 11 is characterized in that: described signal processing unit (16) comprises the second detector (252), the 3rd detector (253) and signal demodulating circuit (26); The second detector (252), the 3rd detector (253) change the two ways of optical signals of optical voltage sensing head (7) outgoing into electric signal transmission to described signal demodulating circuit (28) respectively, calculated respectively the sliding average of the second detector (252), (253) two detection channels of the 3rd detector by signal demodulating circuit, calculate the current ratio DC quantity, then the two-way detectable signal is weighted average computation, make the two-way voltage magnitude reach balance, at last the three-phase voltage value of gained is carried out sending by serial ports after framing according to communication protocol.
14. according to claim 1-4 one of any described tank type three phase optical voltage transformer (VT) is characterized in that: the optical fiber outbound course of the airtight ejector of described optical fiber (10) adopts optical fiber metallization packaged technology, the airtight ejector of described optical fiber (10) comprises metallized optical fibre (29), metal tube (30), O-ring seal (31), optical fiber is drawn flange (32) and optical fiber reach through hole (33), described optical fiber is drawn and is had described optical fiber reach through hole (33) on flange (32), described metal tube (30) passes sealing between described optical fiber reach through hole (33) and described metal tube (30) and described optical fiber reach through hole (33), described metallized optical fibre (29) passes sealing between described metal tube (30) and described metallized optical fibre (29) and described metal tube (30), described O-ring seal (31) is embedded in described optical fiber and draws on the sealing surface of flange (32) and around described optical fiber reach through hole (33) and arrange.
15. according to claim 1-4 one of any described tank type three phase optical voltage transformer (VT) is characterized in that: described shielding cylinder (5) adopt resistivity less than 90, linear expansion coefficient is less than 24.0 * 10
-6The material of/K.
16. according to claim 1-4 one of any described tank type three phase optical voltage transformer (VT) is characterized in that: be filled with SF in described GIS cavity (4)
6Insulating gas.
17. according to claim 1-4 one of any described tank type three phase optical voltage transformer (VT) is characterized in that: the connected mode between described optical voltage sensing head (7) and described probe (8) surface is bonding.
18. tank type three phase optical voltage transformer (VT) according to claim 10 is characterized in that: described BGO crystal (20) contacts with ground electrode in electric system, and the surface of contact of BGO crystal (18) and ground electrode is coated with chromium gold film.
19. tank type three phase optical voltage transformer (VT) according to claim 10 is characterized in that: the described polarizer (18) and described quarter wave plate (19) adopt integrated processing technology to make.
20. according to claim 1-4 one of any single-phase optical voltage transformers of described tank type, it is characterized in that: described insulator (1) is disc insulator.
21. according to claim 1-4 one of any single-phase optical voltage transformers of described tank type, it is characterized in that: described optical voltage sensing head (7) is arranged in the primary system of electric system, and electric unit (12) is in the electrical secondary system of electric system.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110288596 CN102914678B (en) | 2011-09-26 | 2011-09-26 | Tank-type tri-phase optical voltage transformer |
| US13/696,175 US9121872B2 (en) | 2011-09-26 | 2011-10-31 | Electro-optic effect based optical voltage transformer |
| PCT/CN2011/081579 WO2013044542A1 (en) | 2011-09-26 | 2011-10-31 | Optical voltage transformer based on electro-optical effect |
| DE201210203753 DE102012203753B4 (en) | 2011-09-26 | 2012-03-09 | An optical voltage converter based on the electro-optical effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110288596 CN102914678B (en) | 2011-09-26 | 2011-09-26 | Tank-type tri-phase optical voltage transformer |
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| CN102914678A CN102914678A (en) | 2013-02-06 |
| CN102914678B true CN102914678B (en) | 2013-06-05 |
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| CN103245817B (en) * | 2013-04-03 | 2016-05-25 | 易能乾元（北京）电力科技有限公司 | A kind of method of measuring voltage and voltage sensor |
| CN103884901B (en) * | 2014-04-04 | 2016-06-08 | 哈尔滨理工大学 | A kind of high voltage measuring system based on FP voltage sensor and measuring method |
| CN104297552B (en) * | 2014-09-28 | 2017-07-28 | 易能乾元（北京）电力科技有限公司 | A kind of middle pressure optical voltage transformer |
| CN106443154B (en) * | 2016-09-23 | 2020-02-28 | 国网江西省电力公司电力科学研究院 | Current and voltage proportional transformation and sampling device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3806682A (en) * | 1972-10-03 | 1974-04-23 | Bbc Brown Boveri & Cie | High-voltage gas-insulated switchgear with capacitive voltage divider for indicating contact position |
| US6016053A (en) * | 1996-08-26 | 2000-01-18 | Abb Patent Gmbh | Gas-insulated switchgear with voltage transformer and optical measuring element |
| CN201716355U (en) * | 2010-06-10 | 2011-01-19 | 中国西电电气股份有限公司 | Electronic current and voltage transformer for 126kVGIS |
| CN201812668U (en) * | 2010-09-16 | 2011-04-27 | 南京南瑞继保电气有限公司 | Electronic type current and voltage combined mutual inductor of three-phase enclosed GIS (Geographic Information System) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6450527A (en) * | 1987-08-21 | 1989-02-27 | Toshiba Corp | Manufacture of semiconductor device |
| JPH1050527A (en) * | 1996-07-30 | 1998-02-20 | Toshiba Corp | Transformer for light-applying instrument |
-
2011
- 2011-09-26 CN CN 201110288596 patent/CN102914678B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3806682A (en) * | 1972-10-03 | 1974-04-23 | Bbc Brown Boveri & Cie | High-voltage gas-insulated switchgear with capacitive voltage divider for indicating contact position |
| US6016053A (en) * | 1996-08-26 | 2000-01-18 | Abb Patent Gmbh | Gas-insulated switchgear with voltage transformer and optical measuring element |
| CN201716355U (en) * | 2010-06-10 | 2011-01-19 | 中国西电电气股份有限公司 | Electronic current and voltage transformer for 126kVGIS |
| CN201812668U (en) * | 2010-09-16 | 2011-04-27 | 南京南瑞继保电气有限公司 | Electronic type current and voltage combined mutual inductor of three-phase enclosed GIS (Geographic Information System) |
Non-Patent Citations (6)
| Title |
|---|
| 220KV组合式光学电压电流互感器的设计;朱勇等;《高电压技术》;20000430;第26卷(第2期);第34-36页 * |
| 光学电压互感器的研究进展;罗苏南等;《电工电能新技术》;20000331(第1期);第32-35页 * |
| 朱勇等.220KV组合式光学电压电流互感器的设计.《高电压技术》.2000,第26卷(第2期),第34-36页. |
| 电力系统适用光学电压互感器的研究新进展;邹建龙等;《电力系统自动化》;20010510(第9期);第64-67页 * |
| 罗苏南等.光学电压互感器的研究进展.《电工电能新技术》.2000,(第1期),第32-35页. |
| 邹建龙等.电力系统适用光学电压互感器的研究新进展.《电力系统自动化》.2001,(第9期),第64-67页. |
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