Strateško vzdrževanje prenosnih naprav s stališča zanesljivosti in tveganja : doktorska disertacija

slovenian

doktorska dela

2015

Univerza v Mariboru, Fakulteta za elektrotehniko računalništvo in informatiko

Maintenance is a combination of all technical, administrative and management actions in a lifetime of equipment, with the aim of maintaining or establishing the condition, in which the function can be performed. It is a natural process needed for each device to function normally. Even in transmission techniques, maintenance is of key significance for safe and reliable operation of the electricity system. Maintenance terminology deals with two basic approaches, preventive and corrective maintenance. In the area of technical systems and thereby also transmission equipment, from point of reliability, the method of preventative maintenance is currently prevalent. This method can be time-based, or condition-based. This doctoral dissertation addresses strategic maintenance of transmission equipment from the point of reliability and risk. The method of preventive maintenance has been upgraded with the concept of maintenance with focus on reliability. The latter is a concept of strategic maintenance, which may include a system of asset management at a company level. Current solutions of maintenance of transmission systems in the world and in Slovenia are presented with an emphasis on maintenance system in public company ELES d.o.o. The concept of maintenance with the emphasis on reliability significantly deviates from the time, specified for preventive maintenance. Choosing the moment of maintenance depends on the technical condition of the equipment, on its importance and financial-economic indicators. At the same time, the operational reliability of individual devices as well as the entire electric power system should remain at the highest level. The solutions given in the thesis were obtained by introducing optimization using algorithm of differential evolution and include the planning process in the actual execution of maintenance. With this approach, risks of a reliable operation power system and management costs are managed. A general optimization algorithm of strategic maintenance of transmission equipment is made, and is tested on transformer substation Divača.

07.08.2023