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Transformer secondary side load matching device and automatic matching method

A load matching and transformer technology, applied in the field of transformers, can solve the problems of complex load resistance of transformers, and achieve the effects of short matching time, high reliability and uniform waveform.

Active Publication Date: 2015-08-12
JILIN ELECTRIC POWER RES INST LTD +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This complicates matching the proper transformer load resistor

Method used

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  • Transformer secondary side load matching device and automatic matching method
  • Transformer secondary side load matching device and automatic matching method
  • Transformer secondary side load matching device and automatic matching method

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Experimental program
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Embodiment Construction

[0030] The invention is composed of a power conversion part, a sensor acquisition part and a resistance matching part;

[0031] a. Power conversion part: the external power supply is connected to the P3 interface, and then connected to the 1 pin and 2 pin of the DC-DC conversion chip through +12V and GND, and converted to ±12V by DC-DC through the 3 pin and 4 pin The pins are respectively connected to the 4 pins and 5 pins of the voltage sensor S1 and the current sensors S2, S3, and S4;

[0032] b. Sensor acquisition part: pins 7 and 8 of the IN interface are externally connected to the secondary side of the transformer, internally connected to pins 1 and 2 of the voltage sensor S1, pins 5 and 6 of the IN interface, 3, 4 pins, pins 1 and 2 are connected in series to the secondary side of the transformer and the three-phase circuit T of the load circuit A, B, and C, respectively, and connected to pins 1 and 2 of the current sensors S2, S3, and S4 internally. pin; pin 6 is the ...

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Abstract

A transformer secondary side load matching device belongs to the technical field of transformers. The invention aims to perform resistor matching of secondary side circuits of transformers with different transformation ratios, so that the transformer secondary side load matching device which can conveniently observe a transformer current value wave curve and an automatic matching method can be obtained. The device is composed of a power conversion part, a sensor collection part and a resistor matching part. Under a precondition of lots of experiment data, the invention provides a method of performing determination, calculation, matching and automatic load accessing according to voltage values at two sides of a transformer by employing the modern computer technology and taking the host computer program of a transformer on-load tap-changer performance characteristic alternating current test device as the base, so that when the transformer performs on-load tap-changer motions, output current of a secondary side is adjusted to be controlled within a certain measuring range, the amplitude of change in current is reduced, a test waveform which is uniformly stable, smooth and obvious can be obtained during the test of transformers with different transformation ratios, the adaptability of a whole set of alternating current test device in the reality is improved, and the whole set of alternating current test device is enabled to accurately perform related tests and analyze results.

Description

technical field [0001] The invention belongs to the technical field of transformers. Background technique [0002] The power transformer is one of the main equipment in the power system. At present, the on-load tap changer in the national power supply network accounts for more than 90% of the total number of transformers. Fast-moving components, so their own failure rate is very high, and the large-scale transformer accidents caused by it have also increased year after year, seriously affecting the reliability of power supply. In order to reduce the accident rate of large transformers, improve the reliability of power supply, and reduce property losses, the detection of the action characteristics of transformer on-load tap-changers has become an important problem faced by the power industry. [0003] In the past, the on-site testing of transformer on-load tap-changer action characteristics mainly used the DC method, and compared the obtained waveform with the routine test w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 周宏伟崔明董添
Owner JILIN ELECTRIC POWER RES INST LTD
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