Implication of transmission line outages and system cascading collapse in the evaluation of TRM and ATC

Available transfer capability (ATC) and transmission reliability margin (TRM) provides imperative information for power marketers and planning sectors in a deregulated power system. The stochastic environment of power system activities, however, made the evaluation of TRM and ATC a intricate and complicated task. A stochastic structure has been established for TRM and ATC calculation with implication of uncertainties in transmission line outages and system cascading collapse. The evaluation of the proposed TRM and ATC calculation is based on bootstrap technique which allows generating random samples of transmission line outages and system cascading collapse at a predefined confidence interval. The IEEE RTS-79 network is used as a case study in order to verify the effectiveness and robustness of the proposed technique. The results elucidate the significant impact of uncertainties on TRM and ATC value.