Probabilistic Load Flow Calculation Considering Nodes Correlation of Active Distribution Network

摘要

Probabilistic load flow calculation is an important tool to analyze the operating state of active distribution network. There are strong correlations among load characteristics, climatic conditions and other multiple variables of distribution network nodes, aimed at which the calculation method of node injected power correlation is proposed. Node injected power is decoupled with the Cholesky decomposition, converting the distribution network probabilistic load flow calculation to the calculation with uncorrelated input random variables. Hence probabilistic load flow calculation method considering nodes correlation of active distribution network is formed. The effectiveness and accuracy of the proposed method is proven by the comparative tests in the part of modified IEEE 33-bus distribution network. The impacts of nodes correlation on load flow probabilistic distribution are investigated by the proposed method.