CN102253257B - Integrated standard device for field calibration of extra/ultra high voltage capacitor voltage transformer (CVT) - Google Patents
Integrated standard device for field calibration of extra/ultra high voltage capacitor voltage transformer (CVT) Download PDFInfo
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- CN102253257B CN102253257B CN2011101066657A CN201110106665A CN102253257B CN 102253257 B CN102253257 B CN 102253257B CN 2011101066657 A CN2011101066657 A CN 2011101066657A CN 201110106665 A CN201110106665 A CN 201110106665A CN 102253257 B CN102253257 B CN 102253257B
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Abstract
The invention provides an integrated standard device for field calibration of an extra/ultra high voltage capacitor voltage transformer (CVT). The device comprises a test power supply, a test lifting platform, a standard appliance, a measuring instrument and a vehicle platform, wherein the test power supply comprises cascade upper and lower level test transformers, a secondary compensating reactor and a voltage regulator; the standard appliance comprises cascade upper and lower level standard voltage transformers and a high voltage isolated transformer; the test lifting platform comprises a base, transmission mechanisms and insulating support members; the measuring instrument comprises a transformer calibrator and load boxes; all the equipment is fixedly installed on the vehicle platform;and the test lifting platform can lift in the vertical direction. The upper and lower level standard voltage transformers in the standard device can troubleshoot the standard device by way of mutual calibration in the field and complete field calibration of the extra/ultra high voltage CVT, without unloading.
Description
Technical field
The present invention relates to the integrated standard set-up of a kind of CVT field-checking, belong to calibration, calibrating and the detection range of power equipment, relate in particular to the integrated standard set-up of a kind of ultra-high/extra-high voltage CVT field-checking.
Background technology
Along with the high speed development of China's electric power network technique, the emphasis of China's power grid construction will turn on a large scale, the extra-high voltage backbone network of long distance reaches intelligent grid construction based on this.Capacitance type potential transformer (CVT, Capacitor Voltage Transformer) is important electrical equipment in the electrical network, mainly formed by capacitive divider and middle pressure transformer, capacitive divider is made up of insulator and the some series capacitors that are mounted in it, middle pressure transformer is by the transformer that is contained in the leakproof fuel cell, compensation reactor and damping unit are formed, and suppress resonance with damping unit, and damping unit is made up of resistance and reactor.In recent years, along with power industry keeps reforming, generating separates operation with power transmission and distribution enterprise, the effect of CVT in the metering of critical point highlights, in order to ensure fair and just, the accurate standard of electric energy metrical, make generating, transmission of electricity and the tripartite interests of power supply obtain clear and definite and assurance, according to the relevant regulations of China's measurement Law (" GB/T4703-2001 capacitance type potential transformer ", " JJG1021-2007 electric power mutual-inductor vertification regulation "), must regularly carry out field-checking to mutual inductor.At present, all be to adopt the formula field-checking mode of removing stage makeup and costume basically for the 220kV that installs or put into operation～500kV CVT, namely pass through experiment power supply, standard utensil and surveying instrument are transported to the scene, carry out verification after unloading again then, assembling.But this mode is owing to will---assemble a succession of loaded down with trivial details link of---verification---entrucking through unloading, both caused testing equipment to damage easily, huge manpower and materials have also been wasted simultaneously, and carry out scene when assembling at every turn, because experiment power supply, relative position between standard utensil and surveying instrument all is not quite similar, increased the uncertainty of distribution parameter, thereby cause the additive error introduced by measuring system very fixing, badly influence measurement result sometimes even have influence on judgement to the test product performance.And the CVT electric pressure is more high, and the volume and weight of testing equipment is more big, and this formula verification mode of removing stage makeup and costume just more is difficult to satisfy the demand of carrying out in 500kV ~ 1000kV CVT field-checking measurement accuracy and work efficiency.
Summary of the invention
The objective of the invention is: improve in the deficiency that structure, transportation and measurement exist for the verification mode and the check system that the ultra-high/extra-high voltage on-site CVT are carried out verification at existing, provide ultra-high/extra-high voltage CVT field-checking integrated standard set-up, can under the situation that need not to load and unload, examine and determine/calibrate the error of on-the-spot 750kV/1000kV CVT.
Technical scheme of the present invention is: the integrated standard set-up of a kind of ultra-high/extra-high voltage CVT field-checking, this device comprises experiment power supply, test hoistable platform, standard utensil, surveying instrument and vehicular platform, it is characterized in that: described experiment power supply is made up of the upper and lower level of tandem formula testing transformer, second compensation reactor and pressure regulator; The standard utensil is made up of the upper and lower grade standard voltage transformer (VT) of tandem and high pressure isolation transformer; The test hoistable platform is made up of base, gear train and insulated support; Surveying instrument comprises mutual-inductor tester and Burden box, and all devices all is fixedly mounted on the vehicular platform, and wherein testing hoistable platform in vertical direction can lifting;
Subordinate's standard potential transformer and high pressure isolation transformer are formed first SF6 gas insulated metal enclosed swit chgear unit GIS1, higher level's standard potential transformer and higher level's testing transformer are formed second SF6 gas insulated metal enclosed swit chgear unit GIS2, and place on the test hoistable platform; Described GIS1 unit and subordinate's testing transformer place the both sides of test hoistable platform respectively, GIS1 unit, GIS2 unit, subordinate's testing transformer, second compensation reactor connect successively, thereafter be the pressure regulation measurement zone, pressure regulator and surveying instrument place the pressure regulation measurement zone.
The integrated standard set-up of aforesaid ultra-high/extra-high voltage CVT field-checking, it is characterized in that: the low pressure winding of higher level's testing transformer is in parallel with the field copper of subordinate's testing transformer, and the low pressure winding of higher level's standard potential transformer is in parallel with the high pressure winding of high pressure isolation transformer.
The integrated standard set-up of aforesaid ultra-high/extra-high voltage CVT field-checking, it is characterized in that: the low-pressure side of testing transformer arranges the reactive-load compensation winding, and this reactive-load compensation winding is the power supply of second compensation reactor.
The integrated standard set-up of aforesaid ultra-high/extra-high voltage CVT field-checking, it is characterized in that: described GIS1 unit and GIS2 unit include identical assembly: grading ring, bushing and threeway connector.
The integrated standard set-up of aforesaid ultra-high/extra-high voltage CVT field-checking is characterized in that: the high pressure winding of subordinate's standard potential transformer is around the low pressure winding outside, and altogether on transformer iron core, horizontal reclining posture is fixed.
The integrated standard set-up of aforesaid ultra-high/extra-high voltage CVT field-checking is characterized in that: the high pressure winding of higher level's testing transformer is around the low pressure winding outside, and altogether on transformer core.
The integrated standard set-up of aforesaid ultra-high/extra-high voltage CVT field-checking, it is characterized in that: the high pressure of standard potential transformer, high pressure isolation transformer and testing transformer is all drawn by high-pressure conductor and bushing.
The integrated standard set-up of aforesaid ultra-high/extra-high voltage CVT field-checking is characterized in that: GIS1 unit and GIS2 unit adopt gas-tight design, and the SF6 gas with 0.35～0.4MPa pressure is filled in inside.
The invention has the beneficial effects as follows: 1, the testing transformer of integrated series connection formula standard set-up and standard potential transformer are designed to tandem formula and series-mode frame respectively, adopt SF
6Gas-insulated reduces the insulating Design difficulty of single device greatly, and reduces its volume, weight, for vehicle-mounted transportation provides convenience; 2, higher level's standard potential transformer and higher level's testing transformer are designed to integrated GIS unit, effectively reduce sleeve pipe quantity, reduce manufacturing cost; 3, by regulating the REgulatable reactor inductance value testing transformer is carried out reactive-load compensation, reduce the output capacity of pressure regulator and power supply; 4, after the employing integrated design, need not to carry out on-the-spot loading and unloading and can carry out verification work, increase work efficiency greatly; When 5, measuring, experiment power supply, standard utensil and the surveying instrument position relative fixed on vehicular platform has reduced the additive error of being introduced by check system self in measurement, reduce uncertainty of measurement.
Description of drawings
Fig. 1 be in the embodiment of the invention ultra-high/extra-high voltage CVT field-checking with the schematic layout pattern of integrated standard set-up.
Fig. 2 is the measurement zone device layout synoptic diagram among Fig. 1.
Fig. 3 is the structural representation synoptic diagram of GIS1 among Fig. 1.
Fig. 4 is the structural representation synoptic diagram of GIS2 among Fig. 1.
Fig. 5 be among Fig. 1 ultra-high/extra-high voltage CVT field-checking with the basic circuit diagram of integrated standard set-up.
Fig. 6 is the ultra-high/extra-high voltage CVT site error checking circuit figure of the embodiment of the invention.
Embodiment
The present invention is described further below in conjunction with drawings and Examples.
Description of symbols among Fig. 1: 1-subordinate standard potential transformer, 2-high pressure isolation transformer, the 3-gear train, the 4-insulated support, 5-higher level's standard potential transformer, 6-higher level's testing transformer, 7-subordinate testing transformer, 8-second compensation reactor, 9-base, 10-vehicular platform.
Description of symbols among Fig. 2: 11-pressure regulator T
m, 12-mutual-inductor tester HE, 13-Burden box Y1,14-Burden box Y2.
Description of symbols among Fig. 3: 15-grading ring, the 16-bushing, 17-threeway connector, 18-standard mutual inductor high pressure winding, 19-standard mutual inductor low pressure winding, the 20-high-pressure conductor, the 21-transformer iron core, 22-HVIT high pressure winding, 23-HVIT low pressure winding, the 24-HVIT iron core, the insulation distance between the d-coaxial electrode.
Description of symbols among Fig. 4: 25-testing transformer low pressure winding, 26-testing transformer high pressure winding, 27-transformer core.
Description of symbols among Fig. 5: 28-compensates winding, 29-testing transformer field copper;
Description of symbols among Fig. 6: CVT-measured capacitance formula voltage transformer (VT), the dividing potential drop electric capacity of C1, the tested CVT of C2-, L
kCompensation reactor among the-CVT.
The ultra-high/extra-high voltage CVT field-checking of the embodiment of the invention with the device layout synoptic diagram of integrated standard set-up as shown in Figure 1, this device comprises experiment power supply, test hoistable platform, standard utensil and surveying instrument.Wherein, experiment power supply is made up of higher level's testing transformer 6, subordinate's testing transformer 7, second compensation reactor 8 and pressure regulator 11; The standard utensil is made up of higher level's standard potential transformer 5, subordinate's standard potential transformer 1 and high pressure isolation transformer 2; The test hoistable platform is made up of base 12, gear train 6 and insulated support 7; Surveying instrument comprises mutual-inductor tester 15, Burden box 16 and Burden box 17.To test hoistable platform with elevating drive mechanism and be increased to insulated support 7 upper surfaces before the test, with earthy dielectric level be half of trial voltage, again platform is down to original position after the off-test.During test, the inductance value of second compensation reactor 8 is adjustable within the specific limits, is used for the reactive-load compensation of test circuit, reduces the output capacity of pressure regulator 11 and power supply.
As shown in Figure 2, pressure regulator 11, mutual-inductor tester 12 and two Burden box 13,14 orders are placed in the pressure regulation measurement zone.
As shown in Figure 3, Figure 4, GIS1 mainly is made up of subordinate's standard potential transformer 1 and high pressure isolation transformer (HVIT) 2, the high pressure winding 18 of subordinate's standard potential transformer is around low pressure winding 19 outsides, and altogether on transformer iron core 21, laterally reclining posture is fixed; The high pressure winding 22 of HVIT reliably shields with coaxial shape electrode respectively with low pressure winding 23, and the insulation distance between coaxial electrode is d.GIS2 mainly is made up of higher level's standard potential transformer 5 and higher level's testing transformer 6, and in addition, GIS1 and GIS2 also comprise assemblies such as grading ring 15, bushing 16 and threeway connector 17 simultaneously.The structure of higher level's standard potential transformer is identical with subordinate standard potential transformer 1; The high pressure winding 26 of higher level's testing transformer 6 is around low pressure winding 25 outsides, and altogether on transformer core 27.The high pressure of standard potential transformer, HVIT and testing transformer is all drawn by high-pressure conductor 20 and bushing 16.GIS1 and GIS2 adopt gas-tight design, and the SF with 0.35～0.4MPa pressure is filled in inside
6Gas.
In the basic circuit diagram of ultra-high/extra-high voltage CVT field-checking shown in Figure 5 with integrated standard set-up, pressure regulator 11 output voltages are 380V/420V, and capacity is 150kVA.Subordinate's testing transformer 7 capacity are 1000kVA, compensation winding 28 rated voltage 10kV, high pressure winding 26 output rated voltage 320kV.Higher level's testing transformer 6 capacity are 500kVA, high pressure winding 26 output rated voltage 320kV.The inductance value of second compensation reactor 8 is adjustable in 0.3H ~ 0.6H scope.
In ultra-high/extra-high voltage CVT site error checking circuit embodiment shown in Figure 6, the rated voltage U of CVT
N=
, high pressure ground capacitance and tank capacitance sum are about 5000pF ~ 8000pF.During test, under 20% rated voltage, regulate the inductance value of second compensation reactor 8 earlier, make the input current of pressure regulator 11 reach minimum, this moment, test circuit was operated in resonant condition, then voltage is risen to each checkpoint successively, by measuring circuit shown in Figure 6, and according to the relevant regulations in " JJG1021-2007 electric power mutual-inductor vertification regulation ", can carry out field-checking to the error of CVT.
Claims (7)
1. integrated standard set-up of ultra-high/extra-high voltage CVT field-checking, this device comprises experiment power supply, test hoistable platform, standard utensil, surveying instrument and vehicular platform, it is characterized in that: described experiment power supply is made up of the upper and lower level of tandem formula testing transformer, second compensation reactor and pressure regulator; The standard utensil is made up of the upper and lower grade standard voltage transformer (VT) of tandem and high pressure isolation transformer; The test hoistable platform is made up of base, gear train and insulated support; Surveying instrument comprises mutual-inductor tester and Burden box, and all devices all is fixedly mounted on the vehicular platform, and wherein testing hoistable platform in vertical direction can lifting;
Subordinate's standard potential transformer and high pressure isolation transformer are formed first SF6 gas insulated metal enclosed swit chgear unit GIS1, higher level's standard potential transformer and higher level's testing transformer are formed second SF6 gas insulated metal enclosed swit chgear unit GIS2, and place on the test hoistable platform; Described GIS1 unit and subordinate's testing transformer place the both sides of test hoistable platform respectively, GIS1 unit, GIS2 unit, subordinate's testing transformer, second compensation reactor connect successively, thereafter be the pressure regulation measurement zone, pressure regulator and surveying instrument place the pressure regulation measurement zone.
2. the integrated standard set-up of ultra-high/extra-high voltage CVT field-checking according to claim 1, it is characterized in that: the low pressure winding of higher level's testing transformer is in parallel with the field copper of subordinate's testing transformer, and the low pressure winding of higher level's standard potential transformer is in parallel with the high pressure winding of high pressure isolation transformer.
3. the integrated standard set-up of ultra-high/extra-high voltage CVT field-checking according to claim 1, it is characterized in that: the low-pressure side of subordinate's testing transformer arranges the reactive-load compensation winding, and this reactive-load compensation winding is the power supply of second compensation reactor.
4. the integrated standard set-up of ultra-high/extra-high voltage CVT field-checking according to claim 1, it is characterized in that: described GIS1 unit and GIS2 unit include identical assembly: grading ring, bushing and threeway connector.
5. the integrated standard set-up of ultra-high/extra-high voltage CVT field-checking according to claim 1 is characterized in that: the high pressure winding of subordinate's standard potential transformer is around the low pressure winding outside, and altogether on transformer iron core, horizontal reclining posture is fixed.
6. the integrated standard set-up of ultra-high/extra-high voltage CVT field-checking according to claim 1 is characterized in that: the high pressure winding of higher level's testing transformer is around the low pressure winding outside, and altogether on transformer core.
7. the integrated standard set-up of ultra-high/extra-high voltage CVT field-checking according to claim 1 is characterized in that: GIS1 unit and GIS2 unit adopt gas-tight design, and the SF with 0.35～0.4MPa pressure is filled in inside
6Gas.
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| CN2011101066657A CN102253257B (en) | 2011-04-27 | 2011-04-27 | Integrated standard device for field calibration of extra/ultra high voltage capacitor voltage transformer (CVT) |
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| CN2011101066657A CN102253257B (en) | 2011-04-27 | 2011-04-27 | Integrated standard device for field calibration of extra/ultra high voltage capacitor voltage transformer (CVT) |
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| CN102253257B true CN102253257B (en) | 2013-09-04 |
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| CN102944776B (en) * | 2012-10-30 | 2013-12-25 | 苏州华电电气股份有限公司 | Moving test system for characteristics of transformer based on single-phase high-voltage variable-frequency power source parallel operation |
| CN103267958B (en) * | 2013-04-27 | 2016-01-20 | 广东电网公司电力科学研究院 | The circuit of measuring voltage transformer voltage coefficient and method |
| CN103552495B (en) * | 2013-11-21 | 2016-03-16 | 国家电网公司 | Automatic unfolding high-voltage mutual inductor on-site proving car |
| CN104597425B (en) * | 2015-01-21 | 2019-06-14 | 国家电网公司 | One kind being suitable for GIS electronic mutual inductor and charges evaluating platform |
| CN105301550A (en) * | 2015-11-27 | 2016-02-03 | 国网宁夏电力公司电力科学研究院 | Split series combined voltage transformer |
| CN105467350B (en) * | 2015-12-28 | 2018-09-07 | 国网山东省电力公司电力科学研究院 | A kind of vehicle-mounted extra-high voltage CVT verifications Z-type lifting gear and method |
| CN105425189B (en) * | 2016-01-15 | 2018-06-22 | 武汉磐电科技股份有限公司 | Extra-high voltage transformer separate type verifies platform and its installation and checking method |
| CN106443200B (en) * | 2016-10-18 | 2023-04-14 | 国网江苏省电力公司电力科学研究院 | Automatic testing device and method for one-time wiring of 1000kV extra-high voltage CVT |
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| CN109254236A (en) * | 2018-11-14 | 2019-01-22 | 国家电网有限公司 | The field test of frequency conversion resonance vibration pressure-proof experimental rig wideband standard voltage divider and its application method |
| CN110672936B (en) * | 2019-09-11 | 2022-07-08 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | High-voltage capacitor inductance calibration method and device |
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| ES2240625T3 (en) * | 2002-09-11 | 2005-10-16 | Omicron Electronics Gmbh | TEST PROCEDURE OF A TRANSFORMER AND CORRESPONDING TEST DEVICE. |
| CN201285439Y (en) * | 2008-11-13 | 2009-08-05 | 国网武汉高压研究院 | Integrated verification equipment for field CVT |
| CN101592716B (en) * | 2009-06-30 | 2011-09-14 | 深圳市科陆电子科技股份有限公司 | Method and system for testing potential transformer |
| CN101988958A (en) * | 2009-08-07 | 2011-03-23 | 华东电力试验研究院有限公司 | Checking device and checking method of accuracy of capacitor voltage transformer |
| CN202110270U (en) * | 2011-04-27 | 2012-01-11 | 国网电力科学研究院 | Integrated standard device for on-site inspection of super/ extra high voltage constant-voltage transformer (CVT) |
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