Title :
Substation three-phase nonlinear state estimation based on KCL
Author :
Li, Qingxin ; Sun, Hongbin ; Wang, Jing ; Zhang, Boming ; Wu, Wenchuan ; Guo, Qinglai
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
Abstract :
A substation three-phase nonlinear state estimation method based on KCL is presented. Measurements from different apparatus in substation are utilized, such as RTU and PMU three-phase data. Substation state estimation is established on three-phase breaker-oriented model using KCL, in which analog bad data and topology error identification can be decoupled, realizing real-time three-phase unbalanced degree monitoring at substation level. The approach is fast and easy for implementation, providing more accurate data for state estimation at control center level. Tests results for a substation model are reported.
Keywords :
power system state estimation; substations; KCL; PMU; RTU; substation; three phase breaker oriented model; three-phase nonlinear state estimation; Circuit breakers; Current measurement; Impedance; Power measurement; State estimation; Substations; Voltage measurement; Bad Data Identification; Substation State Estimation; Three-phase; Topology Error Identification;
Conference_Titel :
Power Systems Conference and Exposition (PSCE), 2011 IEEE/PES
Conference_Location :
Phoenix, AZ
Print_ISBN :
978-1-61284-789-4
Electronic_ISBN :
978-1-61284-787-0
DOI :
10.1109/PSCE.2011.5772532
