Title :
The Network-model On-line Monitoring System of ZnO Surge Arresters in 500kV Substation
Author :
Wei, Deng ; Weidong, Liu ; Zhiyang, Fu ; Jian, Cao
Author_Institution :
Sch. of Electr. Eng., Wuhan Univ.
Abstract :
In this paper, some existing problems of the on-line monitoring of ZnO surge arresters are discussed. On the basis of the measuring method of resistive basic harmonic current, some improvements are introduced, including the unique device for signal acquisition, selection of reference signal, time sharing and self calibration technique. The on-line monitoring of 500 kV ZnO surge arresters shows that the performance of this instrument is perfect in the collection, processing of the signal and preventing electromagnetic disturbances. Furthermore, it can be used freely among the 3 modes of local test, remote test and automatic test to realize the goal of full automation
Keywords :
arresters; calibration; computerised monitoring; power engineering computing; signal detection; substation automation; 500 kV; ZnO; ZnO surge arresters; automatic test; automation; electromagnetic disturbances; local test; network-model on-line monitoring system; reference signal selection; remote test; resistive basic harmonic current; self calibration technique; signal acquisition; substation; time sharing; Arresters; Automatic testing; Calibration; Current measurement; Monitoring; Substations; Surges; Time measurement; Time sharing computer systems; Zinc oxide; ZnO surge arresters; leakage current; net-work model; on-line monitoring; resistive current;
Conference_Titel :
Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES
Conference_Location :
Dalian
Print_ISBN :
0-7803-9114-4
DOI :
10.1109/TDC.2005.1546753
