Application of the normalized weighting method for the connections between distribution transformers and a primary feeder

A new multi-objective formulation, named normalized weighting method, for the connections between distribution transformers and a primary feeder problem is presented. Six important objectives include power balance, feeder loss, voltage deviation, LCO current, zero and negative unbalance factor are all considered in this problem. These six objectives are of equal important to electric utility companies, but they are somewhat non-commensurable with each other. In view of this, a normalized weighting method for the multi-objective problem is proposed. It can provide a set of flexible solutions by following the intention of decision makers. To increase the realism, the load and operating constraints of the system are all considered. Comparative studies on actual Tai-power systems are given to demonstrate the effectiveness of the phase load balancing and the improvement of operation efficiency for the proposed method.