Korean Energy Economic Review ISSN:1599-7057(Print) 에너지경제연구

Electric power is an important element in any modern economy. The availability of reliable power supply at reasonable cost is important for economic growth and development of a country. Electric power utilities throughout the world therefore strive to meet customer demands with a high quality, economic and reliable power supply. So, as the power industry moves towards open competition, there has been a call for methodology to evaluate power system reliability by using customer interruption characteristics. This paper presents the results of an evaluation and analysis of interruption characteristics by industrial customer. This paper used a direct visit survey to determine investigation and analysis of electric service quality and characteristic by industrial customer. Customer survey conducted throughout Korea using personal interviews with 1,026 sample customers is presented. The reduction effect of interruption cost by warning time in advance and emergency power supply device is also investigated and analyzed.