Title :
Research about single-phase fault feeder selection of small current neutral grounding system
Author :
Wu, Xiuhua ; Pan, Duo ; Zheng, Da
Author_Institution :
Inf. & Electr. Eng. Coll., Shenyang Agric. Univ., Shenyang, China
Abstract :
The reliability of selecting the power lines of single-phase fault in small current grounding system is rather low because the fault current is too little, the electric arc is unstable, the electromagnetic interference is strong and the SNR is low. The paper utilized wavelet transform to extract the transient Special Frequency Band (SFB) of zero sequence voltage and current. Because the transient current directions between faulty feeders and healthy feeders are opposite in SFB, the transient Reactive Power algorithm is selected for the fault feeders selecting. The simulation and analysis by MATLAB verified that the proposed method can exactly distinguish single-phase grounding fault feeders and it has higher reliability and sensitivity.
Keywords :
arcs (electric); earthing; electromagnetic interference; fault currents; power cables; power system reliability; power system transients; reactive power; wavelet transforms; SFB; electric arc; electromagnetic interference; fault current; neutral grounding system; power lines reliability; reactive power algorithm; single-phase fault feeder; special frequency band; transient current directions; wavelet transform; zero sequence current; zero sequence voltage; Circuit faults; Grounding; Impedance; Reactive power; Resonant frequency; Transient analysis; MATLAB simulation; Single-phase fault feeder selection; Small current grounding; wavelet transform;
Conference_Titel :
Artificial Intelligence, Management Science and Electronic Commerce (AIMSEC), 2011 2nd International Conference on
Conference_Location :
Deng Leng
Print_ISBN :
978-1-4577-0535-9
DOI :
10.1109/AIMSEC.2011.6009988
