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arXiv · 1803.04584

Sensitivity Based Thevenin Index for Voltage Stability Assessment Considering N-1 Contingency

Xiaohu Zhang·Di Shi·Xiao Lu·Zhehan Yi·Qibing Zhang·Zhiwei Wang
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Abstract

This paper proposes an approach to address the voltage stability assessment (VSA) considering N-1 contingency. The approach leverages the sensitivity based Thevenin index (STI) which involves evaluating the Jacobian matrix at current operating condition. Since the N-1 contingency case is hypothetical, there is no information regarding the operating condition after a foreseen contingency. The proposed approach first estimates the post-contingency operating point as well as possible PV-PQ transitions based on the current operating point. Then the STI for each contingency can be predicted using the estimated operating condition. Numerical results based on IEEE 14-bus system demonstrate the accuracy of the proposed approach in predicting the voltage stability margin under contingency. Moreover, the on-line implementation of the proposed approach is promising since it only involves solving several linear equations.

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Xiaohu Zhang, Di Shi, Xiao Lu, Zhehan Yi, Qibing Zhang, Zhiwei Wang. 2018-03-13. Sensitivity Based Thevenin Index for Voltage Stability Assessment Considering N-1 Contingency. https://arxiv.org/abs/1803.04584

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