Transformer regulation measuring systems based on virtual instrument

Abstract

The invention discloses a system for measuring the voltage ratio of a transformer on the basis of a virtual instrument, and is characterized in that: the system is composed of a triphase signal resource circuit, a power amplifying circuit, high / low voltage side control circuit, a signal conditioning unit, a data acquisition unit and a CPU control unit including voltage ration measuring program. The invention has the advantages of: 1. the system is suitable for transformer connection group of various connection modes; 2. the system is provided inside with a three-phrase test power supply; 3. the system tests the voltage ratio by a single-phrase power supply method and can adjust the sample rate within the allowed range of AD, thereby ensuring the relatively high test accuracy; 4, the wiring is simple as all needed is to connect six terminals on the high / low voltage side of the transformer and the instrument and left work is realized by the automatic control of the instrument; 5. the instrument is provided inside with a polarity protection function to guarantee the safety of devices and people and can automatically shut off power supply when wiring error is found and give a warning signal; 6. the system stores the measured data into files for analysis and sort management of data.

Description

(1) Technical field: [0001] The invention belongs to the technical field of transformer transformation ratio measurement, and is a transformer transformation ratio measurement system based on virtual instrument technology. (two) background technology: [0002] According to the requirements of GB1094-1996 "Power Transformer Standard" and DL / T596-1996 Electric Power Industry Standard of the People's Republic of China "Preventive Test Regulations for Electric Power Equipment", it is necessary to check the main wiring and distribution of power transformers during the equipment process, before installation and after overhaul. The transformation ratio of the joint was measured. It can be seen that the transformation ratio is one of the important parameters of the transformer. The deterioration of the transformation ratio parameter can reflect many faults of the transformer. For example, you can check whether the number of turns of the coil is correct, the welding quality of the ...

AI Technical Summary

Problems solved by technology

Otherwise, a circulating current will be generated between the two transformers, and the loss will increase. In severe cases, the transformer will fail, such as winding short circuit, open circuit, breakdown, deformation, burning, etc.

According to market research, the existing variable ratio test system is lacking in test accuracy and scope of application, so it is necessary to study a high-precision variable ratio measurement system that can be used for special wiring methods

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