Title :
Technology of detecting GIC in power grids & its monitoring device
Author :
Liu, Lian-Guang ; Zhang, Hao ; Liu, Chun-Ming ; Guo, Jian-Hui ; Guo, Qing-Xiong
Author_Institution :
Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control, Minist. of Educ., Beijing
Abstract :
The magnetic storm results in the transmission lines with geomagnetically induced current (GIC). And GIC happening in random has the frequency between 0.001 Hz~0.1 Hz, and continues from several minutes to several hours. Based on elaborating mechanism and characteristic of GIC in grids and the influence on China power grids, the article has conducted the research work of GIC monitoring technology, and has investigated the method of sampling data of GIC, the survey algorithm and the new monitoring device. The simulated test shows, the monitoring device can effectively measure GIC which is signal of quasi direct current and randomness, has advantages of having few data to be handled and needing little memory space, etc
Keywords :
electric current measurement; magnetic storms; power grids; power transmission lines; sampling methods; 0.001 Hz; 0.1 Hz; GIC monitoring technology; Hall sensor; elaborating mechanism; geomagnetically induced current detection; magnetic storm; monitoring device; power grids; sampling method; survey algorithm; transmission lines; Circuit faults; Computerized monitoring; Earth; Magnetic devices; Magnetic field measurement; Magnetic sensors; Power grids; Power transmission lines; Storms; Transmission line theory; Band-pass filter; Design of hardware & software; GIC measurement Hall sensor; Geomagnetic storm; Hall sensor; Low-pass filter;
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.2005.1546843
