Improvement in system unbalance and loss reduction of distribution feeders using transformer phase rearrangement and load diversity
This paper proposes two techniques for improving the system unbalance and loss reduction by means of transformer load management. First technique, a computer algorithm with linear programming, was used to derive the optimal load diversity among the various load types. Second technique, in regard to transformer phase rearrangement, dynamic programming (DP) with forward and backward procedure is employed to find out the optimal phase assignment of transformer for a feeder. Finally, a three-phase load flow program was used to compute the system losses and system unbalance on a practical feeder in cases of transformer rearrangement, optimal load diversity, and mixed-type. At last, both of the proposed techniques are verified to be valid and available.
load diversity load patterns customer information system