Diagnostics of primary equipment in high voltage switchgears

Magistarskim radom obrađene su metode i postupci koji se koriste u dijagnostičkim ispitivanjima elemenata primarne opreme u rasklopnim postrojenjima visokog napona. Primarna oprema odnosi se na: energetske i mjerne transformatore, visokonaponske prekidače, rastavljače te odvodnike prenapona. Pravodobnim dijagnostičkim ispitivanjima primarne opreme može se predvidjeti vrijeme poduzimanja bitnih aktivnosti održavanja kojima se izbjegavaju neplanirani zastoji, iznenadni kvarovi te potreba za učestalim intervencijama. Prikazani su rezultati ispitivanja nabrojanih elemenata postrojenja na temelju kojih je utvrđeno trenutno stanje opreme. Predviđeni su potrebni zahvati za poboljšanje stanja opreme. Dijagnostička ispitivanja provedena su na realnoj transformatorskoj stanici visokog napona u vlasništvu Hrvatske elektroprivrede.This master thesis addresses methods and procedures which are used in diagnostic testing performed on primary equipment in high voltage switchgears. Primary equipment in high voltage switchgears refers to the power and instrument transformers, highvoltage circuit breakers, disconnectors and surge arresters. The diagnostic testing performed on primary equipment, carried out in a due time, could predict the time required to take necessary steps and execute certain maintenance works that would prevent unscheduled failure, unexpected outages and need for frequent interventions. The testing results of the mentioned system elements are presented, on which the acurate equipment condition has been defined. The necessary interventions for the improvement of the equipment status have been predicted. Diagnostic testing has been performed on real highvoltage substations