An efficient starting process for calculating interval power flow solutions at maximum loading point under load and line data uncertainties

• A new and efficient starting method to be used in the interval power flow at maximum loading point is presented.
• Load and line data uncertainties are considered in the interval power flow solutions.
• This new starting method propitiates convergence with a reduced number of iterations.
• A remarkable gain in terms of computation time is observed.
• This new interval bus voltage initialization operates very well even for large test systems.

This letter proposes a simple and efficient starting process to be used in the interval power flow current injection at the maximum loading point. Load and line data uncertainties are considered. The proposed method is implemented in the Matlab environment using the Intlab toolbox. The main variables associated with the power flow problem are yielded in an interval form. Results are compared with those obtainable by Monte Carlo simulations. A large scale South–southeastern Brazilian network is used to validate the proposed starting process.