Loss Sensitivity Analysis in Distribution Networks Considering the Influence of Power Quality Using Sobol Sensitivity Analysis Method

This paper develops a Sobol sensitivity analysis model of loss of the distribution transformer and line considering complex power quality, to quantitatively analyze the interactive effects of voltage deviation, harmonic and three-phase imbalance on specific component loss, and the most sensitive factors are sought. Firstly, the calculation model of distribution network loss with complex power quality is given. Using the Sobol sensitivity analysis method, the first sensitivity coefficient (FSC) and total sensitivity coefficient (TSC) are deduced according to the loss model, and the sobol sequence is selected for sampling. In addition, FSC and TSC results of the transformer and line are obtained, and the quantitative interaction of among power quality factors on loss is given and analyzed.