Backward sweep technique based phase balancing algorithm for secondary distribution system

Abstract

In secondary power distribution networks, unbalanced loads and feeder laterals result in poor power quality and increased operating costs. Reconfiguration of feeders and phase swapping continues to be the most prominent techniques. In this paper, an algorithm that caters for unbalance in both three-phase and two-phase feeder laterals is discussed. Phase balancing computation is done using both average load per phase and average load per service. This algorithm embeds the rephasing of three-phase along with single-phase consumer service laterals/service wire at each Bus from the tail end of the feeder to its origin, thereby enabling reduction of current in all heavily loaded branches at each Bus. To illustrate the effectiveness of the proposed technique IEEE 13 Bus test feeder is considered.