Power system failure and Security assessment - (.doc)

ABSTRACT :-

Extrapolating from small outages that occur frequently one might expect a large power gird failure only once in 5000 years. But, between 1984 – 2000, utilities logged 11 outages effecting more than 4000 MW. The reasons are evolution of power industry towards   open market has increased the possible sources for system disturbances, reduced the robustness of systems and reduce predictability of operation. The digital revolution has increased the demand for electrical power with higher reliability and quality than conventional centralized power system. So, more rigorous assessments and new requirements for security are presented in this paper.

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