Double-air-gap core electronic current transformer

Abstract

The invention provides a double-air-gap core electronic current transformer. The double-air-gap core electronic current transformer comprises a first double-air-gap core and a second double-air-gap core; the first double-air-gap core is provided with a first air gap and a second air gap, and the connecting line between the first air gap and the second air gap passes through the circle center of the first double-air-gap core; the second double-air-gap core is connected in series with the first double-air-gap core and is coaxial with the first double-air-gap core, the second double-air-gap core is provided with a third air gap and a fourth air gap, and the connecting line between the third air gap and the fourth air gap passes through the circle center of the second double-air-gap core and is perpendicular to the connecting line between the first air gap and the second air gap; a conductor sequentially passes through the centers of the first double-air-gap core and the second double-air-gap core; a data processing chip is connected with coils of the first double-air-gap core and the second double-air-gap core and used for receiving measured data and displaying and outputting the measured data after converting the measured data from analog to digital.

Description

technical field [0001] The invention relates to the technology of electric power system transformers, in particular to a double-air-gap iron-core electronic current transformer. Background technique [0002] The transformer is an important device to ensure the normal, safe and reliable operation of the power system. After years of development, the transformer has developed from the traditional electromagnetic transformer to today's electronic transformer, and the iron core material has developed from the original ferrite to today's nanocrystalline and amorphous materials. However, the existing current transformers cannot conveniently perform live installation measurement on site. [0003] The initial current transformer uses a closed iron core. With the development of the power system, especially the rapid increase of the short-circuit current of the power system, the saturation problem of the closed iron core under large short-circuit current becomes more and more prominen...

AI Technical Summary

Problems solved by technology

Although it can adopt a relatively flexible sensor head structure, its own birefringence problem is difficult to solve. In application, external factors such as ambient temperature and vibration have a great influence on the measurement accuracy, and it is difficult to achieve high accuracy under harsh field conditions. precision

Images