Base load generator unit operating characteristics

The operating characteristics of generating units can vary quite significantly depending upon their available capacity states and how they are utilized by a power system in its response to demand cycles. The rated or full capacity of a generating unit may or may not be available (e.g., derated states due to forced or scheduled partial generating unit outages). The frequency and duration of these reduced capacity states significantly affects the performance of generating units and their utilization patterns within a power system. Based on the Canadian Electrical Association´s and Alberta Power Limited´s data collection systems, this paper presents the results of a statistical study of the continuous operation of several base loaded generating units over a period of 9 years and reveal the unique state transitions between available and nonavailable states and their frequency and duration of occurrence. The generator state characteristics and transitions between available and non-available states provide the essential data necessary for estimating the reliability parameters of generating units and a guide for the utilization of base load generator units and estimates of their probable available capacity states to meet demand cycles