Title :
Detection of ferromagnetic resonance for distribution system
Author :
Rui Yang ; Xiangjun Zeng ; Xiangui Yang
Author_Institution :
Hunan Province Key Lab. of Smart Grids Oper. & Control, Changsha Univ. of Sci. & Technol., Changsha, China
Abstract :
Neutral Ineffectively Earthed Power Systems widely exist in the low and medium voltage distribution networks in China. With transient excitation, electromagnetic voltage transformer is easily saturated to cause ferromagnetic resonance. Combined with the advantages of wavelet analysis and FFT transform, a novel method for detecting the ferromagnetic resonance signal is proposed in this thesis. The above method combined the MATLAB algorithm with fast Fourier transform. The MATLAB algorithm was used to ensure the excitation and the start time of ferromagnetic resonance, and FFT algorithm was used to ensure the frequency of the ferromagnetic resonance signal for ferromagnetic resonance identification. EMTP and MATLAB simulation results showed that this method can extract and analyze the ferromagnetic resonance signal accurately and effectively which can improve the reliability and practicability and it possesses great significance.
Keywords :
distribution networks; fast Fourier transforms; ferromagnetic resonance; potential transformers; signal detection; wavelet transforms; EMTP; FFT transform algorithm; Matlab algorithm; distribution system; electromagnetic voltage transformer; fast Fourier transform; ferromagnetic resonance signal detection; low voltage distribution networks; medium voltage distribution networks; neutral ineffectively earthed power systems; reliability; transient excitation; wavelet analysis; Educational institutions; Magnetic resonance; Power systems; Transient analysis; Wavelet analysis; Wavelet transforms; EMTP; FFT; MALLAT; detection; ferromagnetic resonance;
Conference_Titel :
Power System Technology (POWERCON), 2014 International Conference on
Conference_Location :
Chengdu
DOI :
10.1109/POWERCON.2014.6993913
