Economic imact of power quality disturbances

This paper describes some economic impacts due to power quality disturbances, in the paper mill in the eastern Croatia. Power quality has great importance to all power system operators in modern liberalized energy markets. Voltage sags and short interruptions are probably two of the most serious power quality problems. Total economic losses due to voltage sags are high because there is a significant number of voltage sags during a specific period of time and voltage sags affect a large number of customers. So this paper presents the procedure of voltage sags economic evaluation for complex process of paper production.