Risk-Based Probabilistic Voltage Stability Assessment in Uncertain Power SystemReportar como inadecuado


Risk-Based Probabilistic Voltage Stability Assessment in Uncertain Power System


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School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China





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Academic Editor: Birgitte Bak-Jensen

Abstract The risk-based assessment is a new approach to the voltage stability assessment in power systems. Under several uncertainties, the security risk of static voltage stability with the consideration of wind power can be evaluated. In this paper, we first build a probabilistic forecast model for wind power generation based on real historical data. Furthermore, we propose a new probability voltage stability approach based on Conditional Value-at-Risk CVaR and Quasi-Monte Carlo QMC simulation. The QMC simulation is used to speed up Monte Carlo MC simulation by improving the sampling technique. Our CVaR-based model reveals critical characteristics of static voltage stability. The distribution of the local voltage stability margin, which considers the security risk at a forecast operating time interval, is estimated to evaluate the probability voltage stability. Tested on the modified IEEE New England 39-bus system and the IEEE 118-bus system, results from the proposal are compared against the result of the conventional proposal. The effectiveness and advantages of the proposed method are demonstrated by the test results. View Full-Text

Keywords: risk assessment; static voltage stability; wind power; Quasi-Monte Carlo QMC; Conditional Value-at-Risk CVaR; uncertainty risk assessment; static voltage stability; wind power; Quasi-Monte Carlo QMC; Conditional Value-at-Risk CVaR; uncertainty





Autor: Weisi Deng * , Buhan Zhang, Hongfa Ding and Hang Li

Fuente: http://mdpi.com/



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