  This paper proposes a new linear power flow model for distribution system
with accurate voltage magnitude estimates. The new model can be seen as a
generalization of LinDistFlow model to multiphase distribution system with
generic network topology (radial or meshed) around arbitrary linearization
point. We have shown that the approximation quality of the proposed model
strictly dominates that of the fixed-point linearization (FPL) method, a
popular linear power flow model for distribution system analysis, when both are
linearized around zero injection point. Numerical examples using standard IEEE
test feeders are provided to illustrate the effectiveness of the proposed model
as well as the improvement in accuracy over existing methods when linearized
around non-zero injection points.
