DISTRIBUTION-SYSTEM STATE ESTIMATION

A three-phase distribution system state estimation algorithm is propos ed in this paper. Normal equation method is used to compute the real-t ime states of distribution systems modeled by their actual a-b-c phase s. A current based formulation is introduced and compared with other f ormulations. Observability analysis for the proposed distribution syst em state estimation is discussed. Test results indicate that the norma l equation method is applicable to the distribution system state estim ation and the current based rectangular form formulation is suitable f or this application.