CN204832486U - 750kV level capacitance type potential transformer on -site proving system - Google Patents
750kV level capacitance type potential transformer on -site proving system Download PDFInfo
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Abstract
The utility model discloses 750kV level capacitance type potential transformer on -site proving system belongs to the mutual -inductor and detects technical field, mainly solves the device that steps up in requirement that on -the -spot 750kV level capacitance type potential transformer traced to the source to high accuracy more and the on -the -spot check -up difficulty of stepping up, easily receives electromagnetic interference's problem, including etalon, frequency conversion electron source, transformer calibrator and simulation load device, its characteristics are: the etalon includes standard voltage mutual -inductor and inductive voltage divider, wherein: the standard voltage mutual -inductor steps up winding and standard voltage mutual -inductor secondary proportion winding by standard voltage mutual -inductor primary winding, standard voltage mutual -inductor to be constituteed, inductive voltage divider comprises inductive voltage divider primary winding, inductive voltage divider secondary power supply winding and inductive voltage divider secondary proportion winding, simulation load device comprises a gauge load, no. Two gauge loads, measurement winding and instrument winding transfer relay, a gauge load work relay and no. Two gauge load work relays.
Description
Technical field
The utility model belongs to mutual inductor detection technique field, is specifically related to 750kV level capacitance type potential transformer on-site proving system and calibration method.
Background technology
The on-site proving of 750kV level capacitance type potential transformer mainly comprises the on-the-spot 750kV level capacitance type potential transformer of calibrating under power frequency 80%, 100%, 105% rated voltage, and corresponds to the error of rated load and lower limited load under this voltage.
At present, in 750kV level, transformer station carries out field-checking to capacitance type potential transformer, general employing resonance step-up, error of measurement ratio juris complete error testing, there is following problem in this method of testing: (1) increasing apparatus and standard mutual inductor bulky, quality weight, is not easy to carrying and scene is put; (2) because capacitance type potential transformer capacitive load is large, greatly, up to tens kilovolt-amperes, on-the-spot boosting is difficult for required testing transformer and power supply capacity; (3) cordwood many heavy reactors of on-the-spot series connection need crane lifting, waste time and energy.After having lifted, because seven or eight reactors are perpendicular to ground, any external impacts all can cause reactor to collapse, and there is potential safety hazard; (4) during the variation of work place, need to remove reactor new work place is transferred in entrucking, re-assembly, these all bring great inconvenience to work on the spot, sometimes even cannot normally carry out the work by operating environmental condition restriction; (5) due to the electromagnetic environment of 750kV level transformer station high-voltage large current complexity, testing apparatus is very easily subject to electromagnetic interference (EMI), and test job cannot normally be carried out, and the accuracy of test is easily influenced.For above situation, in order to solve inefficiency in 750kV level capacitance type potential transformer field-checking process, safety coefficient is low, intensity of workers is large problem, the direction adopting Di Jiao supreme people's court to be field-checking from now in verification at the scene, Di Jiao supreme people's court does not need bulky, that quality is heavy standard and increasing apparatus, only under relatively low voltage, the parameter of testing capacitor formula voltage transformer (VT) need be extrapolated to the error under 80 ~ 105% voltage percentages again, really increase work efficiency, alleviate intensity of workers, ensure production safety.
Summary of the invention
The utility model mainly solves increasing apparatus boosting difficulty in the requirement and field-checking that on-the-spot 750kV level capacitance type potential transformer traces to the source to more high precision, is subject to electromagnetic interference (EMI), the problem that can not accurately examine and determine.
The utility model is solve the problems of the technologies described above the technical scheme taked to be:
750kV level capacitance type potential transformer on-site proving system, comprise standard, variable-frequency electric component, mutual-inductor tester and simulation load device, be characterized in: described standard comprises standard potential transformer and inductive voltage divider, wherein: standard potential transformer is made up of standard potential transformer winding, standard potential transformer boosting winding and standard potential transformer secondary ratio winding; Inductive voltage divider is made up of power winding and inductive voltage divider secondary ratio winding of inductive voltage divider winding, inductive voltage divider secondary;
Described mutual-inductor tester comprises signal condition unit, data acquisition unit, data processing operation unit, display unit, guidance panel, standard loop input end and difference loop input; Described signal condition unit transfers to data acquisition unit by after signal condition, and Signal transmissions to data processing operation unit, is finally shown by the result of display unit by data processing operation unit by data acquisition unit; Described standard loop input end comprises mutual-inductor tester standard loop input head end and mutual-inductor tester standard loop input end; Described difference loop input comprises mutual-inductor tester difference loop input head end and mutual-inductor tester difference loop input end; Guidance panel is connected with data processing operation unit by data line;
Described simulation load device is made up of a scale load, No. two scale load, measure winding and instrument winding transfer relay, a scale load working relay and No. two scale load working relays; Standard potential transformer winding head end and standard potential transformer winding ends is connected with the high-voltage connection head end of measured capacitance formula voltage transformer (VT) and capacitance type potential transformer high-voltage connection end respectively; The first and last end of described standard potential transformer boosting winding is connected with the output terminal of variable-frequency electric component respectively; The first and last end of standard potential transformer secondary ratio winding is connected with the first and last end of a described inductive voltage divider winding respectively; The power first and last end of winding of described inductive voltage divider secondary inputs head end and mutual-inductor tester standard loop respectively and inputs end and be connected with mutual-inductor tester standard loop; The head end of described inductive voltage divider secondary ratio winding is connected with the simulation measure winding of load device and the moving contact of instrument winding transfer relay, and the end of inductive voltage divider secondary ratio winding inputs head end with mutual-inductor tester difference loop and is connected; Mutual-inductor tester difference loop input end ground connection, and be positioned at the metering error of measurement end of simulating on load device and be connected;
The metering error of measurement head end of described simulation load device is connected with measured capacitance formula voltage transformer secondary measure winding head end, and the metering error of measurement end of simulation load device is connected with measured capacitance formula voltage transformer secondary measure winding end; A described scale load working relay is in parallel with measured capacitance formula voltage transformer secondary measure winding after connecting with a scale load; Described No. two scale load working relays are connected with No. two scale loads afterwards and measured capacitance formula mutual induction of voltage instruments and meters winding parallel; Simulation load instrument error of measurement head end is connected with measured capacitance formula mutual induction of voltage instruments and meters winding head end, and in simulation load device inside, that simulates load instrument error of measurement head end and measure winding and instrument winding transfer relay often opens stationary contact in succession; Simulation load instrument error of measurement end is connected with measured capacitance formula mutual induction of voltage instruments and meters winding ends, inner at simulation load device, simulation load instrument error of measurement end measures difference end with simulation load gauge and is connected, and measure winding is connected with the metering error of measurement head end of simulation load device with the normally closed stationary contact of instrument winding transfer relay.
The utility model compared with prior art, has following beneficial effect:
The utility model adopts standard and simulation load device, Di Jiao supreme people's court is adopted at the scene in verification, do not need bulky, that quality is heavy standard and increasing apparatus, error under only needing the parameter of testing capacitor formula voltage transformer (VT) to be at lower voltages extrapolated to 80 ~ 105% voltage percentages again, increase work efficiency, alleviate intensity of workers, ensure production safety.
Accompanying drawing explanation
Fig. 1 is the utility model principle assumption diagram;
Fig. 2 is the mutual-inductor tester principle assumption diagram in the utility model.
In figure: 1-standard; 2-standard potential transformer winding; 3-standard potential transformer boosting winding; 4-variable-frequency electric component; 5-inductive voltage divider secondary is powered winding; 6-inductive voltage divider secondary ratio winding; 7-mutual-inductor tester; 8-standard potential transformer secondary ratio winding; 9-inductive voltage divider winding; The measure winding of 10-capacitance type potential transformer; 11-measured capacitance formula voltage transformer (VT); 12-capacitance type potential transformer instrument winding; 13-simulation load device; 14-standard loop input end; 15-signal condition unit; 16-data acquisition unit; 17-data processing operation unit; 18-display unit; 19-difference loop input; 20-guidance panel; T1-standard potential transformer; T2-inductive voltage divider; The high-voltage connection head end of A-capacitance type potential transformer; The high-voltage connection end of N-capacitance type potential transformer; The head end of A1-standard potential transformer winding; N1-standard potential transformer winding ends; 1a-capacitance type potential transformer measure winding head end; 1n-capacitance type potential transformer measure winding end; 2a-capacitance type potential transformer instrument winding head end; 2n-capacitance type potential transformer instrument winding ends; 1a1-metering error of measurement head end; 1n1-metering error of measurement end; 2a1-simulation load instrument error of measurement head end; 2n1-simulation load instrument error of measurement end; G1-No. mono-scale load; G2-No. bis-scale load; Je1-measure winding and instrument winding transfer relay; Jy1-No. mono-scale load working relay; Jy2-No. bis-scale load working relay; U-mutual-inductor tester standard loop input head end; Δ U-mutual-inductor tester difference loop input head end; E1-mutual-inductor tester standard loop input end; E2-mutual-inductor tester difference loop input end.
Embodiment
As shown in Figure 1,750kV level capacitance type potential transformer on-site proving system, comprise standard 1, variable-frequency electric component 4, mutual-inductor tester 7 and simulation load device 13, be characterized in: described standard 1 comprises standard potential transformer T1 and inductive voltage divider T2, wherein: standard potential transformer T1 is made up of standard potential transformer winding 2, standard potential transformer boosting winding 3 and standard potential transformer secondary ratio winding 8; Inductive voltage divider T2 is made up of power winding 5 and inductive voltage divider secondary ratio winding 6 of inductive voltage divider winding 9, inductive voltage divider secondary; Described simulation load device 13 is made up of a scale load G1, No. two scale load G2, measure winding and instrument winding transfer relay Je1, scale load working relay Jy1 and No. two scale load working relay Jy2; Standard potential transformer winding head end A1 and standard potential transformer winding ends N1 are connected with measured capacitance formula voltage transformer (VT) high-voltage connection head end A and measured capacitance formula voltage transformer (VT) high-voltage connection end N respectively; The first and last end of described standard potential transformer boosting winding 3 is connected with the output terminal of variable-frequency electric component 4 respectively; The first and last end of standard potential transformer secondary ratio winding 8 is connected with the first and last end of a described inductive voltage divider winding 9 respectively; The power first and last end of winding 5 of described inductive voltage divider secondary inputs head end U and mutual-inductor tester standard loop respectively and inputs end E1 and be connected with mutual-inductor tester standard loop; The head end of described inductive voltage divider secondary ratio winding 6 is connected with the simulation measure winding of load device 13 and the moving contact of instrument winding transfer relay Je1, and end and the mutual-inductor tester difference loop of inductive voltage divider secondary ratio winding input head end Δ U and be connected; Mutual-inductor tester difference loop input end E2 ground connection, and be positioned at the metering error of measurement end 1n1 simulated on load device 13 and be connected;
The metering error of measurement head end 1a1 of described simulation load device 13 is connected with measured capacitance formula voltage transformer (VT) measure winding head end 1a, and the metering error of measurement end 1n1 of simulation load device 13 is connected with measured capacitance formula voltage transformer (VT) measure winding end 1n; It is in parallel with measured capacitance formula voltage transformer (VT) measure winding 10 after a described scale load working relay Jy1 connects with a scale load G1; It is in parallel with measured capacitance formula mutual induction of voltage instruments and meters winding 12 after described No. two scale load working relay Jy2 connect with No. two scale load G2; Simulation load instrument error of measurement head end 2a1 is connected with measured capacitance formula mutual induction of voltage instruments and meters winding head end 2a, and in simulation load device inside, that simulates load instrument error of measurement head end 2a1 and measure winding and instrument winding transfer relay Je1 often opens stationary contact in succession; Simulation load instrument error of measurement end 2n1 is connected with measured capacitance formula mutual induction of voltage instruments and meters winding ends 2n, inner at simulation load device, simulation load instrument error of measurement end 2n measures difference end 1n1 with simulation load gauge and is connected, and measure winding is connected with the metering error of measurement head end 1a1 of simulation load device 13 with the normally closed stationary contact of instrument winding transfer relay Je1.
750kV level capacitance type potential transformer on-site proving method, comprise no-load error calibrating and load error calibrating, concrete verification step is as follows:
1) on the guidance panel of tester, measured capacitance formula voltage transformer (VT) rated primary voltage is inputted, rated secondary voltage, class of accuracy, rated load;
2) when measured capacitance formula voltage transformer (VT) supply voltage is 35kV, capacitance type potential transformer measure winding head end 1a is connected by measure winding and instrument winding transfer relay Je1 and inductive voltage divider secondary ratio winding 6 head end, capacitance type potential transformer measure winding end 1n meets mutual-inductor tester difference loop input end E2, and simultaneously ground connection, a scale load G1 is connected in parallel on the first and last end of the measure winding 10 of capacitance type potential transformer, by the break-make of a scale load working relay Jy1 of connecting with a scale load G1, record load error and the no-load error of the measure winding of measured capacitance formula voltage transformer (VT),
3) no-load error measured by second step and load error numerical information are transferred to the data processing operation unit of mutual-inductor tester, record the impedance Z 1 of measured capacitance formula voltage transformer (VT) measure winding and the rated load error ε 1 of measured capacitance formula voltage transformer (VT) measure winding;
4) when measured capacitance formula voltage transformer (VT) supply voltage is 35kV, capacitance type potential transformer instrument winding head end 2a is connected by measure winding and instrument winding transfer relay Je1 and inductive voltage divider secondary ratio winding 6 head end, capacitance type potential transformer instrument winding ends 2n meets mutual-inductor tester difference loop input end E2, and simultaneously ground connection, No. two scale load G2 are connected in parallel on the first and last end of the instrument winding 12 of capacitance type potential transformer, by the break-make of No. two scale load working relay Jy2 of connecting with No. two scale load G2, measure load error and the no-load error of measured capacitance formula mutual induction of voltage instruments and meters winding,
5) load error measured by the 4th step and no-load error numerical information are transferred to the data processing operation unit of mutual-inductor tester, record the impedance Z 0 of a measured capacitance formula voltage transformer (VT) winding and the rated load error ε 2 of measured capacitance formula mutual induction of voltage instruments and meters winding;
6) variable-frequency electric component 4 output frequency is adjusted to 5Hz, regulation output voltage, respectively 80%, 100%, 105% rated voltage time power to measured capacitance formula voltage transformer (VT) 11, record the corresponding excitation admittance of measured capacitance formula voltage transformer (VT) measure winding 10;
7) the excitation admittance that the 6th pacing obtains is transferred to the data processing operation unit of mutual-inductor tester, draws the no-load error ε 3 of measured capacitance formula voltage transformer (VT) measure winding 10 under 80%, 100%, 105% rated voltage;
8) at guidance panel input ε 1, ε 2 and the ε 3 of tester, through the data processing operation unit 17 of mutual-inductor tester, record measured capacitance formula voltage transformer (VT) 11 under power frequency, 80%, under 100%, 105% rated voltage time, and corresponding to rated load and lower limit load error under this voltage.
Claims (1)
1.750kV level capacitance type potential transformer on-site proving system, comprise standard (1), variable-frequency electric component (4), mutual-inductor tester (7) and simulation load device (13), it is characterized in that: described standard (1) comprises standard potential transformer (T1) and inductive voltage divider (T2), wherein: standard potential transformer (T1) is made up of standard potential transformer winding (2), standard potential transformer boosting winding (3) and standard potential transformer secondary ratio winding (8); Inductive voltage divider (T2) is made up of power winding (5) and inductive voltage divider secondary ratio winding (6) of inductive voltage divider winding (9), inductive voltage divider secondary; Described simulation load device (13) is made up of a scale load (G1), No. two scale loads (G2), measure winding and instrument winding transfer relay (Je1), a scale load working relay (Jy1) and No. two scale load working relays (Jy2); Standard potential transformer winding head end (A1) and standard potential transformer winding ends (N1) is connected with measured capacitance formula voltage transformer (VT) high-voltage connection head end (A) and measured capacitance formula voltage transformer (VT) high-voltage connection end (N) respectively; The first and last end of described standard potential transformer boosting winding (3) is connected with the output terminal of variable-frequency electric component (4) respectively; The first and last end of standard potential transformer secondary ratio winding (8) is connected with the first and last end of a described inductive voltage divider winding (9) respectively; The power first and last end of winding (5) of described inductive voltage divider secondary inputs head end (U) and mutual-inductor tester standard loop respectively and inputs end (E1) and be connected with mutual-inductor tester standard loop; The head end of described inductive voltage divider secondary ratio winding (6) is connected with the measure winding of simulation load device (13) and the moving contact of instrument winding transfer relay (Je1), and end and the mutual-inductor tester difference loop of inductive voltage divider secondary ratio winding input head end (Δ U) and be connected; Mutual-inductor tester difference loop input end (E2) ground connection, and be positioned at the metering error of measurement end (1n1) of simulating on load device (13) and be connected;
The metering error of measurement head end (1a1) of described simulation load device (13) is connected with measured capacitance formula voltage transformer (VT) measure winding head end (1a), and the metering error of measurement end (1n1) of simulation load device (13) is connected with measured capacitance formula voltage transformer (VT) measure winding end (1n); A described scale load working relay (Jy1) is in parallel with measured capacitance formula voltage transformer (VT) measure winding (10) after connecting with a scale load (G1); Described No. two scale load working relays (Jy2) are in parallel with measured capacitance formula mutual induction of voltage instruments and meters winding (12) after connecting with No. two scale loads (G2); Simulation load instrument error of measurement head end (2a1) is connected with measured capacitance formula mutual induction of voltage instruments and meters winding head end (2a), inner at simulation load device, simulation load instrument error of measurement head end (2a1) and measure winding and instrument winding transfer relay (Je1) often open stationary contact in succession; Simulation load instrument error of measurement end (2n1) is connected with measured capacitance formula mutual induction of voltage instruments and meters winding ends (2n), inner at simulation load device, simulation load instrument error of measurement end (2n) measures difference end (1n1) with simulation load gauge and is connected, and measure winding is connected with the metering error of measurement head end (1a1) of simulation load device (13) with the normally closed stationary contact of instrument winding transfer relay (Je1).
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| CN201520594556.8U CN204832486U (en) | 2015-08-03 | 2015-08-03 | 750kV level capacitance type potential transformer on -site proving system |
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| CN201520594556.8U CN204832486U (en) | 2015-08-03 | 2015-08-03 | 750kV level capacitance type potential transformer on -site proving system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093151A (en) * | 2015-08-03 | 2015-11-25 | 国家电网公司 | 750kV level capacitive voltage transformer onsite calibration system and calibration method |
| CN108181600A (en) * | 2017-12-29 | 2018-06-19 | 国网新疆电力有限公司电力科学研究院 | Capacitance type potential transformer test device |
| CN109407034A (en) * | 2018-12-12 | 2019-03-01 | 云南电网有限责任公司昆明供电局 | A kind of synchronization of great current mutual inductor first and second termination |
-
2015
- 2015-08-03 CN CN201520594556.8U patent/CN204832486U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093151A (en) * | 2015-08-03 | 2015-11-25 | 国家电网公司 | 750kV level capacitive voltage transformer onsite calibration system and calibration method |
| CN108181600A (en) * | 2017-12-29 | 2018-06-19 | 国网新疆电力有限公司电力科学研究院 | Capacitance type potential transformer test device |
| CN109407034A (en) * | 2018-12-12 | 2019-03-01 | 云南电网有限责任公司昆明供电局 | A kind of synchronization of great current mutual inductor first and second termination |
| CN109407034B (en) * | 2018-12-12 | 2023-09-08 | 云南电网有限责任公司昆明供电局 | Primary and secondary synchronous wiring device of large-current transformer |
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