Effective Contingency Ranking Based on Composite Indices
نویسندگان
چکیده
Contingency ranking in power system transient stability is a complicated and time consuming task. To prevail over this difficulty, various indices are used. These indices are based on the concept of coherency and three dot products of the system variables. It is well known that some indices work better than others for a particular power system. This paper introduces an innovative composite severity index for power system transient stability. In this paper two composite indices are presented and compared. One of them is based on Least Mean Square (LMS) and the other based on summing up indices by evenly balanced weights. To illustrate the effectiveness of the developed severity indices, they have been tested for two real practical power systems. Numerical simulations of the developed index, demonstrate that composite index with LMS method is more effective than other indices. Key-words: dynamic security, transient stability, combination of indices, severity indices
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Effective transient stability assessment based on composite indices
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