ISSN 1000-1026
CN 32-1180/TP
  • ISSN 1000-1026
  • CN 32-1180/TP

Citation: WANG Han,YAN Zheng,XU Xiaoyuan,HE Kun.Global Sensitivity Analysis for Islanded Microgrid Based on Sparse Polynomial Chaos Expansion[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20180625006 copy

Global Sensitivity Analysis for Islanded Microgrid Based on Sparse Polynomial Chaos Expansion

  • Received Date: June 25, 2018
    Accepted Date: January 14, 2019
    Available Online: 2019-03-13

  • Abstract:

        As the penetration rate of renewable energy sources and the proportion of electric vehicles continue to increase, the uncertainties in the operation of microgrids have increased significantly. Accurate assessment of the influence of uncertainties on the status of microgrids will help improve the safe and stable operation of the system. Considering the uncertainties of source and loads, the probabilistic power flow model of islanded microgrids is established and the global sensitivity analysis indices are introduced. Then, the global sensitivity analysis of islanded microgrids based on sparse polynomial chaos expansion is proposed. The proposed method is used to accurately and quickly identify critical input random variables that affect the operating status of the system. Through the simulation of a 40-bus island microgrid with distributed generators, the accuracy and efficiency of the proposed method are verified. The influence of the source and load uncertainty on the power flow of islanded microgrid is analyzed, and the importance ranking of input random variables is given. The results provide reference indices for the priority configuration of energy storage system and monitoring devices.

  • Keywords:

    islanded microgrid; uncertainty; sparse polynomial chaos expansion; global sensitivity analysis; energy storage system configuration

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