Open AccessA Low Frequency Oscillation Disturbance Source Positioning Method Based on Oscillation Phase Difference
Author(s) -
Duo Li,
Xiaodong Chen,
Jun Zhang,
Hao Yu
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/619/1/012030
Subject(s) - low frequency oscillation , oscillation (cell signaling) , control theory (sociology) , disturbance (geology) , hilbert transform , hilbert–huang transform , mode (computer interface) , phase (matter) , power (physics) , fault (geology) , electric power system , computer science , spectral density , physics , control (management) , artificial intelligence , telecommunications , white noise , paleontology , quantum mechanics , seismology , biology , genetics , geology , operating system
In the face of voltage sag which causes power quality problems, combined with the common short circuit fault types in power system, how to locate disturbance source quickly and accurately is an important problem in low frequency oscillation monitoring and control. The mechanism of the disturbance source affecting the unit in the network is analyzed. A low frequency oscillation source location method based on oscillation phase difference is proposed. Firstly, the electrical data of the dominant oscillation mode are extracted by empirical mode decomposition, then the oscillatory phase with physical meaning is calculated by Hilbert transform. According to the network information criterion, the location of the disturbance source can be traced, according to the power plant. The ground information criterion can check the specific disturbance source unit. The principle of the method is clear, only one electrical quantity is needed to participate in the calculation.