Hybrid Non-linear State Estimation with Voltage Phasor Measurements

Author

Qin, Xiaohui ; Bi, Tianshu ; Yang, Qixun

Author_Institution

Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control, North China Electr. Power Univ., Beijing

fYear

2007

fDate

24-28 June 2007

Firstpage

1

Lastpage

6

Abstract

In this paper, a new method of hybrid non-linear state estimation with PMU is proposed. Firstly, the voltage phasor measurements are transformed into indirect equivalent branch current measurements, with which the conventional state estimator takes the impact of PMU into consideration. Secondly, the indirect measurement errors caused by the measurement transforming are analyzed and calculated in detail. Thirdly, the accuracy of hybrid estimator is analyzed in the paper. The simulation results show that the proposed method improves the accuracy of estimator and the convergence speed also.

Keywords

electric current measurement; measurement errors; nonlinear estimation; power system measurement; power system state estimation; voltage measurement; PMU; hybrid nonlinear state estimation; indirect equivalent branch current measurement; measurement errors; phasor measurement unit; power system; voltage phasor measurements; Bismuth; Current measurement; Fluid flow measurement; Hybrid power systems; Jacobian matrices; Phasor measurement units; Power measurement; Power system simulation; State estimation; Voltage measurement; measurement transforming; power system; state estimation; voltage phasor measurement;

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.2007.385829

Filename

4275595