Title :
WLS state estimation in polar and rectangular coordinate systems for power system with UPFC: Significance of types of measurements
Author :
Okon, Tomasz ; Wilkosz, Kazimierz
Author_Institution :
Inst. of Electr. Power Eng., Wroclaw Univ. of Technol., Wroclaw, Poland
Abstract :
The paper presents a comparative investigations of the state estimation of a power system with UPFC in the polar and rectangular coordinate systems, paying special attention to types of utilized measurements. The estimation with the use of the weighted-least-squares method is considered. During investigations, impact of a coordinate system, in which the state vector is considered, stress of a power system, a data redundancy, and types of utilized measurements on such parameters of a state estimation as: the number of iterations, the condition number of the gain matrix, parameters characterizing accuracy of calculation results is analyzed.
Keywords :
least squares approximations; load flow control; power system state estimation; UPFC; WLS state estimation; gain matrix; polar coordinate systems; power system; rectangular coordinate systems; weighted-least-square method; Accuracy; Inverters; Power measurement; Reactive power; State estimation; UPFC; polar coordinate system; power system; rectangular coordinate system; state estimation;
Conference_Titel :
Modern Electric Power Systems (MEPS), 2010 Proceedings of the International Symposium
Print_ISBN :
978-83-921315-7-1
