Title :
A Unified Processing Method for Hybrid Measurements in State Estimation under Changed Measurement Triggering Mode
Author :
Wang, Yong ; Guo, Zhizhong ; Ren, Jiangbo ; Peng, Maojun
Author_Institution :
Dept. of Electr. Eng., Harbin Inst. of Technol., Harbin
Abstract :
The changed measurement triggering mode (CMTM) of state estimation (SE) is presented. Measurements from SCADA and WAMS can be handled uniformly under this mode. The sensitivity relationship among state, measurements and estimated power is analyzed and the tracking SE algorithm based on sensitivity analysis is presented. At each triggering moment, only the changed measurements are handled by this sensitivity analysis method. Test results indicate that this method can not only reduce the computation time for a single SE greatly, but also guarantee good estimation accuracy which is very close to that of weighted least squares (WLS) algorithm.
Keywords :
SCADA systems; power system measurement; power system state estimation; SCADA; WAMS; changed measurement triggering mode; hybrid measurement; sensitivity analysis; state estimation algorithm; supervisory control and data acquisition system; unified processing method; wide-area measurement system; Current measurement; Hybrid power systems; Least squares approximation; Monitoring; Power measurement; Power system analysis computing; Power system measurements; SCADA systems; Sensitivity analysis; State estimation; changed measurements; hybrid measurements; power system; sensitivity analysis; state estimation; tracking;
Conference_Titel :
Power Engineering Society General Meeting, 2007. IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
1-4244-1296-X
Electronic_ISBN :
1932-5517
DOI :
10.1109/PES.2007.385455
