Title :
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
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;
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.2007.385829
