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A reduced-order method for estimating the stability region of power systems with saturated controls

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Abstract

In a modern power system, there is often large difference in the decay speeds of transients. This could lead to numerical problems such as heavy simulation burden and singularity when the traditional methods are used to estimate the stability region of such a dynamic system with saturation nonlinearities. To overcome these problems, a reduced-order method, based on the singular perturbation theory, is suggested to estimate the stability region of a singular system with saturation nonlinearities. In the reduced-order method, a low-order linear dynamic system with saturation nonlinearities is constructed to estimate the stability region of the primary high-order system so that the singularity is eliminated and the estimation process is simplified. In addition, the analytical foundation of the reduction method is proven and the method is validated using a test power system with 3 buses and 5 machines.

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Authors and Affiliations

  1. Department of Electrical Engineering, Zhejiang University, Hangzhou, 310027, China

    Gan DeQiang, Xin HuanHai, Qiu JiaJu & Han ZhenXiang

Authors
  1. Gan DeQiang
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  2. Xin HuanHai
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  3. Qiu JiaJu
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  4. Han ZhenXiang
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Corresponding author

Correspondence to Xin HuanHai.

Additional information

Recommended by Prof. LU Qiang, member of Editorial Committee of Science in China, Series E: Technological Sciences

Supported by the National Natural Science Foundation of China (Grant No. 50595411) and the New Century Outstanding Investigator Program of the Ministry of Education (Grant No. NCET-04-0529)

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Gan, D., Xin, H., Qiu, J. et al. A reduced-order method for estimating the stability region of power systems with saturated controls. SCI CHINA SER E 50, 585–605 (2007). https://doi.org/10.1007/s11431-007-0073-6

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  • DOI: https://doi.org/10.1007/s11431-007-0073-6

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