Component Importance Indices of Transmission Systems Based on The Impact-increment Based State Enumeration Method

In view of the problem that the existing transmission system reliability assessment indices cannot determine the weak links of the system, the component importance index is put forward based on the idea of using importance measures. Furthermore, this paper proposes a method for quickly calculating the component importance index of each transmission line combined with the impact-increment based state enumeration method. The results of component importance index can be used to rank the transmission lines and put forward the most effective measures to improve the system reliability. Case studies are performed on IEEE RTS-79 test system to demonstrate the accuracy and computational efficiency of the proposed component importance indices. It also verifies the guiding role of the proposed component importance index in improving the system reliability.

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