Decomposed three-phase power flow solution using the sequence component frame

With new developments in power systems, system unbalance is somewhat aggravated. Three-phase analysis of power systems is necessary both for planning and for monitoring. In the paper, a decomposed three-phase AC power flow algorithm using the sequence component frame is developed, in which a three-phase unbalanced power flow problem is decomposed into three separate subproblems with weak mutuality. The mutuality is included by putting the three subproblems into an iterative process. Simulation tests have verified that the approach can give an accurate solution with much less computational time and storage requirements than the existing methods and can converge reliably under any conditions of unbalance in the system loading and networks