TY - JOUR AU - Sedighi, A. R. AU - Sayaf, M. AU - Taban, M. R. TI - Improving the Power System State Estimation Algorithm Based on the PMUs Placement and Voltage Angle Relationships JO - Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran VL - 16 IS - 2 SP - 135 EP - 141 PY - 2018 DO - ER -