Determination of harmonic current contributions based on robust state estimation

Authors : Erhan SEZGİN, Murat GÖL, Özgül SALOR

Pages : 307-317

View : 8 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this paper, a state estimation based method is proposed to determine harmonic current contributions of plants supplied from a point of common coupling insert ignore into journalissuearticles values(PCC);. This work mainly aims to reduce gross error of capacitive voltage transformer insert ignore into journalissuearticles values(CVT); measurements at harmonic frequencies using robust weighted least absolute value insert ignore into journalissuearticles values(WLAV); state estimation method, which provides the optimum state estimates for harmonic voltages in the presence of a redundant enough measurement set. Estimated harmonic voltages are then used to solve the harmonic current contribution problem based on superposition theorem. It has been shown that the proposed method can provide optimum harmonic estimates when CVTs are used. The use of the proposed method with proper measurement placement makes resistive-capacitive voltage transformers insert ignore into journalissuearticles values(RCVTs); redundant. Results of the proposed method are comparable with measurements of RCVTs, which have the disadvantages of having high costs and being cumbersome to install.
Keywords : Harmonic current contribution, power quality, state estimation, weighted least absolute value estimation