Panov A. Methods and monitoring system for SF6 circuit breakers for 330-750 kV voltage rating

Object of research: monitoring of SF6 gas-insulated breakers of electric substations voltage of 330-750 kV. Purpose: The purpose of the work is to develop the scientific and technical bases for the construction of a system for monitoring the SF6 gas-insulated breakers of electric substations w voltage 330-750 kV in the direction of developing new methods for monitoring their parameters and technical state and model for estimating the residual switching resource. Methods of research: numerical, analytical and experimental methods in the field of modeling of physical processes. Theoretical and practical results: the method of continuous integrated online monitoring of the technical state of the mechanical elements of the SF6 circuit breaker is developed; the well-known model for estimating the residual switching resource of the SF6 circuit breakers is improved by using a more precise method of representing the resource characteristic and the formula for determining the current value of the trip currents; The method of monitoring parameters of a gas mixture of high-voltage insulating switches has been developed. Subject and degree of implementation: the results of work are implemented in the monitoring system of SF6 and used on all substations voltages 750 kV of the State Enterprise NEC "Ukrenergo" Implementation efficiency: the use of these monitoring systems for SF6 breakers allows to optimize the process of maintenance of switches, prevents premature removal of equipment from works, increases reliability of the combined power system of Ukraine Scope of application: electric power stations and substations of voltage over 110 kV, complete SF6 insulating gas