Title :
A new method of power system state estimation based on wide-area measurement system
Author :
Li, Hong ; Li, Weiguo
Author_Institution :
Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Baoding, China
Abstract :
According to the different forms of Jacobian matrix, three new methods of power system state estimation based on wide-area measurement system (WAMS) are proposed in the paper, in which the state variable measurements of phasor measurement unit (PMU) are transformed into branch current measurements correspondingly. Besides, the measurement noise is produced by adding random error to the true values of the measurement, which makes the standard deviation of each measured value disparate. That is, the weight of each measurement is different, so the estimated precision is improved highly. At the end of the paper, two examples are presented to test the new methods.
Keywords :
Jacobian matrices; electric current measurement; phase measurement; power system measurement; power system state estimation; Jacobian matrix; PMU; WAMS; branch current measurement; phasor measurement unit; power system state estimation; random error; standard deviation; state variable measurement; wide-area measurement system; Current measurement; Jacobian matrices; Measurement standards; Noise measurement; Phasor measurement units; Power measurement; Power system measurements; State estimation; Weight measurement; Wide area measurements; measurement transformation; phasor measurement unit; power system; state estimation;
Conference_Titel :
Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4244-2799-4
Electronic_ISBN :
978-1-4244-2800-7
DOI :
10.1109/ICIEA.2009.5138565
