ANALYSIS OF THE INFLUENCE OF CURRENTS IN NEIGHBORING BUSBARS ON CONTROL SYSTEMS IN HIGH-VOLTAGE NON-CONTACT CONVERTERS AND THE RESULTING ERRORS
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This article details the construction principles of contactless ferromagnetic converters designed for measuring and controlling direct currents used in high-voltage electrical installations, their operating principle, and the main requirements they must meet according to state and international standards. According to the research results, the proposed design solution, unlike traditional converters, is characterized by its ability to accept a wide range of changes in the control signal, high measurement accuracy and sensitivity, technological simplicity, minimal material consumption, low cost, compact dimensions, and light weight. The article also provides an in-depth analysis of the errors caused in the measurement process by currents flowing in corresponding and opposite directions through adjacent busbars in non-contact magnetomodulation converters. The conducted research showed that the errors arising from the magnetic influence of adjacent busbar currents differ significantly depending on the number of measurement points and the number of divisions in the magnetic core. In particular, when the number of measurement points exceeds twelve, the error can sharply decrease or, conversely, increase depending on the density of magnetic field divisions. This indicates the need to select optimal parameters in the design of the converters. The developed new generation of magnetic-modulation contactless converters has wide practical application potential and shows high efficiency in contactless monitoring of alternating and direct currents in industrial enterprises, railway automation, metallurgical processes, water supply systems, land reclamation, scientific and technical research, and other sectors. It can also be effectively used for on-site calibration and verification of electricity meters, especially on high-current busbars, where no additional mechanical connections are required.
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