In recent years, with the significant increase in the proportion of new energy in the power grid, the uncertainty of the grid has increased significantly. Quantifying the impact of uncertainty on the power grid is of great significance for maintaining the safety and stability of the power system. As an uncertainty quantification method used to evaluate the influence of uncertainty factors on system output, global sensitivity analysis has been extensively studied by domestic and foreign scholars for its application in power systems. The concept of sensitivity analysis is elaborated and the analysis method of global sensitivity is introduced firstly. Secondly the paper describes the application scenarios of global sensitivity in power systems, and finally summarizes and outlooks on the analysis method and application of global sensitivity.
KEYWORDS: Power supplies, Optimization (mathematics), Network security, Electromagnetism, Transformers, Systems modeling, Dimension reduction, Complex systems, Communication engineering, Analytical research
The current power grid is a hierarchical and partitioned power grid, and the power supply adequacy of the partitioned 220kV power grid needs to be evaluated in real time. The article analyzes the sensitivity between the branch power flow and the node load, the sensitivity between the branch power flow and the generator active power, and deduces the optimization model of the power supply adequacy of the district power grid. This paper uses a linear optimization method that takes into account the power flow section constraints and the branch power flow sensitivity to solve the model. This paper uses the IEEE30-node system as a calculation example to verify the above method. The results show that the real-time assessment of the power supply adequacy of the power grid can calculate the maximum power supply capacity of the regional power grid and reflect the current operating conditions of the power grid.
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