PROBLEMS OF USING CURRENT MEASURING TRANSFORMERS IN ELECTRICITY DISTRIBUTION SYSTEMS OF UZBEKENERGO

Abstract

Until recently, measurements of electrical quantities in switchgears of industrial enterprises, including power plants, are performed using electromagnetic current transformers, the cost of which is a significant fraction of the cost of the entire switchgear. Due to the nonlinearity of the magnetization curve of the magnetic circuit, such current transformers cannot fundamentally provide satisfactory metrological characteristics in transient conditions, as well as after the flow of short circuit currents, when the magnet circuit of the current transformer of the aperiodic component of the short circuit current occurs The article proposes the use of a fiber-optic current transformer, which, due to its design, does not have the above-mentioned drawbacks and can be used in electric power engineering, in high-voltage measuring equipment, in the field of relay protection and automation. The technical result is to increase the reliability and stability of measurements in conditions of long- term operation with all types of affecting electrical voltage, affecting mechanical loads and various effects of environmental factors.