Corrected transient energy function-based strategy for stability probability assessment of power systems

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Corrected transient energy function-based strategy for stability probability assessment of power systems

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A new model describing the uncertainty of fault clearing time for probabilistic transient stability assessment of power systems is proposed. In this, a corrected transient energy function-based strategy is developed to evaluate the probabilistic instability index of systems. The advantage of this approach is that evaluations of critical clearing time in the system stability probability assessment are only conducted for very severe contingencies, an extremely small fraction of all considered contingencies. Hence, the computation efficiency has been remarkably enhanced. Case studies on a representation of the North China power system are reported to show that the proposed assessment strategy is effective and practical.

Inspec keywords: probability; power system faults; power system transient stability

Other keywords: corrected transient energy function-based strategy; probabilistic transient stability; power systems stability probability assessment; North China power system; fault clearing time

Subjects: Other topics in statistics; Power system control

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