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Matching device and automatic matching method for transformer secondary side load

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, small variation range and high measurement accuracy

Active Publication Date: 2018-05-29
JILIN ELECTRIC POWER RES INST LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This complicates matching the proper transformer load resistor

Method used

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  • Matching device and automatic matching method for transformer secondary side load
  • Matching device and automatic matching method for transformer secondary side load
  • Matching device and automatic matching method for transformer secondary side load

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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 respectively, and the DC-DC is converted into ±12V 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, S4;

[0032] b. Sensor acquisition part: Pins 7 and 8 of the IN interface are connected to the secondary side of the transformer externally, and internally connected to pins 1 and 2 of the voltage sensor S1, pins 5 and 6 of the IN interface, 3, 4 pins, 1 and 2 pins 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 internally connected to the 1, 2 leads of the current sensors S2, S3, and S4. Pin...

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Abstract

A transformer secondary side load matching device belongs to the technical field of transformers. The object of the present invention is to perform resistance matching on secondary side circuits of transformers with different transformation ratios, so as to obtain a matching device and an automatic matching method for secondary side loads of transformers which are convenient for observing waveform curves of transformer current values. The invention is composed of a power conversion part, a sensor collection part and a resistance matching part. The present invention applies modern computer technology, based on the upper computer program of the AC test device for the action characteristics of the transformer on-load tap changer, and on the premise of a large amount of experimental data, a method of judging, calculating, matching and automatically The method of connecting the load, so that when the transformer on-load tap changer operates, the output current of the secondary side is adjusted, the current is controlled in a certain range, and the variation range of the current is reduced, so that when testing transformers with different transformation ratios, the obtained It is a relatively uniform, smooth, smooth and obvious test waveform, which enhances the adaptability of the whole set of AC test equipment in practice, so that it can accurately carry out related tests and analyze the results.

Description

Technical field [0001] The invention belongs to the technical field of transformers. Background technique [0002] Power transformers are one of the main equipment in the power system. At present, the on-load tapping transformers in the national power supply network account for more than 90% of the total number of transformers. Because the transformer on-load tap changer is the only transformer in high voltage and high current Fast-moving parts have a high failure rate. Large-scale transformer accidents caused by it have also increased year after year, which seriously affects 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 the on-load tap changer of the transformer has become an important issue facing the power industry. [0003] In the past, the DC method was mainly used to detect the action characteristics of on-load tap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 崔明周宏伟董添都明亮王长胜田春光王朔林海丹胡可为周玉光
Owner JILIN ELECTRIC POWER RES INST LTD
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