PROBABILISTIC 3-PHASE LOAD FLOW

In actual systems unavoidable uncertainties affect the steady-state op erating conditions of a power system: these uncertainties are mainly d ue to changes of load demands and of generation system. Taking into ac count the uncertainties, it is most useful to introduce random variabl e and to apply probabilistic techniques of analysis. Up to now probabi listic power flows neglect the unbalances of the loads and of the othe r components and consider adequate single-phase model of the whole pow er system. In this paper the probabilistic power flow is extended to t he three-phase field to evaluate the uncertainties which affect the st eady-state operating conditions of an unbalanced power system. Both Mo nte Carlo procedure and a linearized form are proposed. A numerical ap plication to a test system is also discussed. (C) 1998 Published by El sevier Science Ltd. All rights reserved.