Instability of low frequency oscillation close mode shapes in Power System

Author

Hu Yong-qiang ; Zhao Shu-qiang ; Liu Lu

Author_Institution

Dept. of Electr. Eng., North China Electr. Power Univ., Baoding, China

fYear

2010

fDate

28-31 March 2010

Firstpage

1

Lastpage

3

Abstract

In a n-machine power system, there are n-1 low frequency oscillation modes and corresponding n-1 low frequency oscillation mode shapes. Frequencies of these modes are distributed in a small range of 0.2-3.0 Hz, thus close modes may occur. This paper first analyzes sensitivity of low frequency oscillation close mode shapes to small change of system parameters, points out the instability of close mode shapes in power system. Then, eigenvector turning angles criterion is presented to identify close modes. At last New England 10-machine system is employed to validate the conclusion.

Keywords

eigenvalues and eigenfunctions; oscillations; power system stability; sensitivity; test equipment; New England 10-machine system; close mode shapes; eigenvector turning angles criterion; frequency 0.2 Hz to 3 Hz; low frequency oscillation; n-machine power system; power system instability; system parameters; Damping; Equations; Frequency; Power system analysis computing; Power system interconnection; Power system measurements; Power system modeling; Power system stability; Power systems; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2010 Asia-Pacific

Conference_Location

Chengdu

Print_ISBN

978-1-4244-4812-8

Electronic_ISBN

978-1-4244-4813-5

Type

conf

DOI

10.1109/APPEEC.2010.5448407

Filename

5448407