Analysis of Forced Power Oscillation Based on FFT

2018 International Conference on Advanced Technologies in Energy, Environmental and Electrical Engineering

能源学;生态环境科学;无线电电子学

Guo, Siyuan^1 ; Zhao, Yongsheng^1 ; Song, Junying^2 ; Zhang, Shoushou^3 ; Liu, Haifeng^1

State Grid Hunan Electric Power Company Limited, Research Institute, Changsha

410007, China^1

State Grid Hunan Electric Power Company Limited, Changsha

410004, China^2

Bangor College, Central South University of Forestry and Technology, Changsha

410018, China^3

关键词: Chain reaction;    Energy function methods;    Energy functions;    Forced power oscillations;    Interconnected power grid;    Large-scale blackout;    Low frequency oscillations;    Steady state oscillation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/223/1/012020/pdf
DOI  :  10.1088/1755-1315/223/1/012020

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Low-frequency oscillations occur frequently in many interconnected power grids around the world. In severe cases, even system-wide chain reactions are triggered, resulting in system unwinding and large-scale blackouts. In this paper, a FFT-based forced power oscillation disturbance source localization method is introduced. Using the active power and frequency of the steady-state oscillation phase of the low-frequency oscillation, the dominant component of the oscillation is obtained by the fast Fourier transform (FFT), and then the disturbance source is automatically positioned according to the energy function. Taking the low-frequency oscillation accident occurring in Hunan power grid as an example, the energy function based on FFT and the traditional energy function method are compared, which shows that the proposed method can locate the disturbance source more accurately.