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High precision multi-transformation ratio voltage transformer comparison device

A voltage transformer and multi-ratio technology, which is applied to transformers, inductors, transformer/inductor coils/windings/connections, etc., can solve the problems of increasing the difficulty of on-site inspection and lack of voltage transformers, and reduce troubleshooting Time, improve the effect of on-site work efficiency

Inactive Publication Date: 2015-09-16
WUHU POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently a lack of equipment capable of on-site inspection of voltage transformers, which increases the difficulty of on-site inspection

Method used

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  • High precision multi-transformation ratio voltage transformer comparison device
  • High precision multi-transformation ratio voltage transformer comparison device
  • High precision multi-transformation ratio voltage transformer comparison device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 There are five secondary-side inlet connectors;

[0026] Primary winding 3 turns N1=U1 / E=13800 / 0.82≈33600 turns, 6kV / 100V, The primary and secondary turns ratio is 60, so 6kV / 100V, The number of turns of the secondary winding 1 is 280 turns, 10kV / 100V, The primary and secondary turns ratio is 100, so 10kV / 100V, The number of turns of secondary winding 1 is 168 turns, 20kV / 100V, The primary and secondary turns ratio is 200, so 20kV / 100V, The number of turns of secondary winding 1 is 84 turns, 35kV / 100V, The primary and secondary turn ratios are 350, so 35kV / 100V, The number of turns of secondary winding 1 is 48 turns. The primary and secondary turns ratio is 1100, The number of turns of secondary winding 1 is 15.27273 turns, take 15 turns and then use secondary winding 1 fractional turn compensation.

[0027] The theoretical basis of the device is as follows:

[0028] The principle of a voltage transformer is somewhat similar to that of a ...

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Abstract

The present invention discloses a high precision multi-transformation ratio voltage transformer comparison device. The device comprises a primary winding, a secondary winding and an iron core. The iron core is an R-shaped iron core; the primary winding and the secondary winding are wound on the same side of the iron core; the primary winding is wound outside the secondary winding; the primary winding is connected to a primary side incoming line connector; on the secondary winding, tap connection lines are drawn out from positions corresponding to transformation ratio intervals; and each tap connection line is connected to a corresponding secondary side incoming line connector. According to the present invention, efficiency and accuracy of field error checking of voltage transformers are improved, thereby reducing troubleshooting time in work and improving fieldwork efficiency. The device can also be used in transformation ratio measurement calibration assessment of a transformer transformation ratio tester to inspect the accuracy and stability of the transformer transformation ratio tester in testing an actual transformation ratio.

Description

technical field [0001] The invention relates to a voltage transformer and a transformer transformation ratio testing device. Background technique [0002] Potential transformer is an important part of electric energy metering device, and its metering error characteristics directly affect the accuracy of electric energy metering value. With the development of the power system towards high voltage and large capacity, the accuracy and reliability of voltage transformer measurement errors are becoming more and more important. [0003] In recent years, with the rapid development of power grid construction, there are a large number of newly built, expanded and renovated substations with voltage levels of 110kV and above, so a large number of calibration work of newly put into operation voltage transformers is involved. In the on-site verification of high-voltage transformers, it is often necessary to compare the errors of the standard voltage transformers after long-distance bump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/24H01F27/28H01F27/32G01R15/18
Inventor 张云飞杨珂贾秀明武天文张长王治龙李慧芳卢丽鹏穆林
Owner WUHU POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER
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