Atarod S. Improvment of high-voltage dividers of direct and alternating voltage (frequencies of 50 Hz)

Research object: sharply non-uniform electric fields in the designs of high-voltage dividers containing concentrated capacitive and resistive elements which performances correspond to a particular statistical distribution. Goal of the work: development of the analysis methods for the non-uniform electric fields and induced potential in constructions of high-voltage capacitive-resistive voltage dividers, and providing, on this basis, the considerable improving of their performance characteristics without essential change of insulation design. Research techniques: using of the theory of an electromagnetic field for the analysis electric and magnetic components of devices interaction, the theory of insulation materials, high-voltage insulation and high voltage engineering, electrical measurements and high-voltage tests, methods of electric fields calculations by using personal computers, mathematical statistics and approximation of functions, processing of results of natural and simulation experiments, and also carrying out of metrological operations with high-voltage dividers. Theoretical and practical results and novelty: by using the induced potential theory, the mathematical model intended for the coordination of potentials distribution within a circuit of the concentrated elements, and also of an electric field of the high-voltage divider arm is developed; it is proved that when normal distribution of the capacitive elements of a high-voltage arm is used, the effect of their non-uniformity essentially increasing the maximum distortions of an amplitude-frequency characteristic and the phase-frequency characteristic in comparison to case of using real distribution set; constructions of high-voltage dividers of capacitive-resistive type having an air-polymeric insulation are implemented with considerably improved parameters of accuracy for the range of 0,8 … 100 kV. Subject and extent of implementation: results of the dissertation are adopted in the State Factory "Ukrmetrteststandart" for the procedure of high-voltage test facilities metrological certification. Efficiency of implementation: the accuracy of scale transformation for direct and an alternating (50-Hz frequency) voltages by means of high-voltage dividers is considerably raised. Application area: Metrological certification of high-voltage test facilities and other high-voltage electric equipment.