It is well known a fact that any major analysis exercise of power systems almost invariably includes power-flow calculations. In distribution system power-flow, three-phase representation of all the system components is essential. Transformer being the most important component in distribution systems, a unified three-phase model is presented which is applicable to all basic winding connections of distribution transformer with elegance and ease. Voltage Regulators are also modeled.
Reconfiguration is an important exercise in optimization of distribution systems. A novel approach based on sensitivity is proposed for multiobjective reconfiguration of distribution networks. Its accuracy and efficiency is validated by obtaining multiobjective reconfiguration results and comparing them with those obtained by heuristic based fuzzy multiobjective reconfiguration approach. It is shown that the proposed approach is much faster and easier to implement as against the fuzzy multiobjective reconfiguration.