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

fYear

2007

fDate

24-28 June 2007

Firstpage

1

Lastpage

6

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society General Meeting, 2007. IEEE

Conference_Location

Tampa, FL

ISSN

1932-5517

Print_ISBN

1-4244-1296-X

Electronic_ISBN

1932-5517

Type

conf

DOI

10.1109/PES.2007.385455

Filename

4275337