کفایت منابع به سیستم قدرت عمده فروشی در آمریکای شمالی

In addition we determine the distribution of unscheduled unavailable capacity, unscheduled derating magnitudes, event durations, event arrival probabilities, and mean time between failure (MTBF) and mean time to recovery (MTTR) values. In each case, we report fit parameters to facilitate use by practitioners. The distributions of unscheduled unavailable capacity in each region are reasonably well modeled by Weibull and lognormal distributions. We find statistically significant differences in mean time between failure for small and large units for three unit types when aggregating over regions. Finally we present time series of unavailable capacity from unscheduled, maintenance, and scheduled events. These may be used in conjunction with load data to directly study resource adequacy risks without assuming independent failures or constant availability. Our findings suggest that power system resource planners should consider correlated outages as they identify reliability and reserve capacity requirements.