An improved initial guess of Newton method for hybrid state estimation

• Main Authors: Rakpenthai,C., Uatrongjit,S.
• Format: Conference or Workshop Item
• Published: 2015
• Online Access: http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84913536741&origin=inward; http://cmuir.cmu.ac.th/handle/6653943832/39079
• Institution: Chiang Mai University

© 2014 IEEE. The hybrid state estimation of a power system, where the measured data consist of both conventional measurements and synchronizing phasor measurements, is generally formulated as a nonlinear optimization problem. It is then solved by Newton based iteration procedure whose success depends on an appropriate initial guess. This paper presents an improved method for selecting a suitable initial solution for this problem. All data obtained from both conventional and synchronizing phasor measurements are employed to estimate the initial guess. Numerical results on the IEEE 14-bus and 57-bus systems indicate that the proposed technique provides better convergence performance than the method previously proposed in Ref. [5].