Power System Fault Data and Time Series

Power system reliability and continuous electric power supply without downtimes or with a few as shorter as possible interruptions are basic for financial success in today's power market (EN50160). So, modern customer oriented relationships and efficient electricity service have to be included in nowadays power system management. Reliability and availability are concept very close to electric power supply. It is based on analysing the faults on the power lines and transformer substations and maintenance during the system function in the past, managing to improve power quality in the future performance. Maybe, the most important problem to researcher who does the power system reliability evaluation is a lack of data. Missing data are related to power lines faults, and to power customers demands and electric power flow in the system, which depend on network structure (branch connections between buses, switching states, maintenance, load characteristics), day time, seasons (average temperature) in the each faults period. These three types of power system data were estimated with more or less accuracy. This paper presents a systematic way to register some parameters of power system faults and maintenance during the time, as time series.