Precise isolated intelligent mutual inductor

Abstract

The invention relates to a precise isolated intelligent mutual inductor, and belongs to the technical field of mutual inductors. A current transformer collection module, an isolation module, a filtering module and an automatic detection module are arranged between a primary bus current signal unit and a slope compensation circuit; the current transformer collection module is connected with the primary bus current signal unit; the isolation module is connected with the current transformer collection module; the slope compensation circuit is connected with a control chip via a current control signal; and a secondary output voltage signal unit is connected with a voltage set value comparison module via an optical coupler isolation module. The structural design is reasonable, internal and external signals are combined, isolation is realized in different isolation forms before and after transfer, interference is reduced to the minimum, the precision can be improved via slope compensation and amplification compensation, the mutual inductor is internally provided with an automatic control module, self check can be realized, feedback information can be restored automatically, and the usingefficacy of the mutual inductor can be improved greatly.

Description

technical field [0001] The invention relates to a precision isolation intelligent transformer, which belongs to the technical field of transformers. Background technique [0002] Instrument transformer, also known as instrument transformer, is a general term for current transformer and voltage transformer. It can change high voltage into low voltage and high current into small current for measurement or protection system. Its function is mainly to convert high voltage or high current into standard low voltage (100V) or standard small current (5A or 1A, both refer to rated value) in proportion, so as to realize the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. change. At the same time, the transformer can also be used to isolate the high-voltage system to ensure the safety of people and equipment. [0003] With the continuous application of many new materials, many new types of transformers have emerged,...

AI Technical Summary

Problems solved by technology

However, with the continuous increase of power transmission capacity, the continuous improvement of grid voltage level and the continuous improvement of protection requirements, the general iron core current transformer structure has gradually exposed its incompatible weaknesses. Weaknesses such as saturation, ferromagnetic resonance, small dynamic range, and narrow frequency band are difficult to meet the development needs of the new generation of power system automation and power digital network.

Images