Mysenko S. Improving the methods and means of diagnosing SF6 circuit breakers

The object - the processes of change of the technical state of gas-insulated switches in during their operation. The aim - to improve the reliability of electric power systems by improving diagnostic software hexafluoride circuit breakers and detection of damage at an early stage of development. Methods - Theoretical Electrical Engineering - for the construction and analysis of mathematical models of current test signal, theoretical mechanics - for the study of the kinematics of the drive mechanism, probability theory, systematic approach and method of formalization in developing new methods of diagnosing gas-insulated high-voltage switches, physical and mathematical modeling. Theoretical results: first proposed a combined method of determining the technical condition of structural elements of gas-insulated switches, which, unlike known, based on the measurement of leakage current through the insulation hardware inputs and DC resistance of the main conductive path and continuous control signal as a current test signal whose frequency provides a condition of resonance between the inductance of the transformer auxiliary test signal source and capacity between the contacts of the switch during its operation and compare the characteristics of reference previously removed before entering the switch up and analysis of deviations of these characteristics to reasonably certain time intervals that can simultaneously detect arc in Drivers and cell damage in the early stages of their development without restrictions caused by structural parameters of the switch; improved mathematical model of change of current test signal in gas-insulated switches when performing manufacturing operations, which manifests itself in taking into account the characteristics of extinguishing medium, active resistance and capacitance between the switch contacts, settings isolation hardware inputs relative to grounded parts of the switch and can improve the accuracy of evaluation of technical condition of the switch results of controls; took the further development of the method of determining the optimal parameters of the test signal by using the method of integral analogues, thus improving the information content and reliability of technical state of the switch in terms of noise. Practical results: developed the diagnostic system for provides monitoring and analysis of parameters of test signal DC and AC currents, evaluation of technical condition of arc chutes and drive mechanism that automates and increases the probability of determining the technical state of EB in the early stages of damage. The implementation - the results introduced in the Southwest Power System (act introduction of 10.14.2014). and in the educational process Vinnytsia National Technical University (act introduction of 20.10.2014). Sector (industry) use - power engeniring.