TRANSMISSION LINE POSITIVE SEQUENCE PARAMETER DETERMINATION USING SYNCHRONIZED PHASOR MEASUREMENT

摘要

Digital power system models use impedance values to represent both the balanced and unbalanced states of a transmission line, these values are obtained from formulas using many simplifying assumptions. The resultant values serve as accurate representations of a transmission line within the constraints of the assumptions. However, when conditions exist in a transmission line that are not accounted for in the modeling assumptions, significant error can result. Synchronized phasor measurement is a proven technology that has the ability to measure power system parameters and perform calculations in real time at speeds previously not possible. These real time calculations can be used to validate power system models, and predict dangerous transmission line conditions as system loading changes. This work focuses on the use of a real time, simplified calculation to determine transmission line positive sequence impedance.