Pouzdanost je osnovni tehnički pokazatelj koji utiče na konkurentnost termoelektrana u uslovima deregulisanog tržišta električnom energijom. Da bi se moglo upravljati ovim parametrom tokom eksploatacije, neophodno je odrediti fizičke uzroke promene pouzdanosti tokom radnog veka. U radu je analizirana eksploataciona istorija kondenzacione termoelektrane koja sagoreva mrki ugalj u prahu, na način pogodan za proračun pouzdanosti postrojenja, definisana je pouzdanost tokom eksploatacije i razmotreni su fizički uzroci njene promene tokom radnog veka.Reliability is the basic technical indicator which affects on competitiveness of thermal power plants in the terms of deregulated electricity market. Physical causes of reliability changes are important for evaluation because of it's influence on reliable management during service life. Service history of condensation type thermal power plant with coal powder combustion was analyzed in this article in the manner convenient for reliability calculations. These calculations were made in the first approximation with taking into account the physical causes of reliability exchanges
