Contingency cut-off criteria in transmission system adequacy assessment

The authors present a comparative study of three contingency cut-off criteria which can be used in quantitative assessment of transmission system adequacy. An efficient approach designated as the selection procedure is described which provided better results than those obtained using a ranking method. The memory requirement, depending upon the number of lines and the contingency level up to which the outages are considered, can be quite large for practical power networks. The proposed method is simple and flexible. It can be easily implemented with any computer program package developed for power-system adequacy assessment. It is believed that the proposed technique provides an efficient and relatively simple procedure for adequacy evaluation of large power systems.