Sensitivity analysis of power quality factors on additional losses of distribution network lines based on Sobol’ method

With the expansion of power consumption scale of power system, power quality disturbances are increasing day by day. It is of great significance to study the influence of power quality factors of distribution network on the additional loss of lines. In this paper, Sobol’s global sensitivity analysis method is used to calculate and analyze the first-order sensitivity coefficient (FSC) and total sensitivity coefficient (TSC) of each power quality factor on the additional loss of distribution network lines, taking the additional loss of distribution network lines as the objective function. The results show that Sobol’ method can be used to quantitatively analyze the influence of various power quality factors on the additional loss of distribution network lines. The total sensitivity coefficients of voltage deviation are 1.1709752, which have a great impact on the additional loss of distribution network lines; The total sensitivity coefficients of three-phase current imbalance and harmonics are 25.96 times and 2.28 times of their first order sensitivity coefficients respectively, which indicates that these two parameters have strong interaction with other parameters, and their impact on the additional loss of distribution network lines needs to be considered comprehensively.