Method of Using Power Grid as Large Antenna for Geophysical Imaging

Pulkkinen, Antti A [Inventor]Bonalsky, Todd M [Inventor]Ames, Troy [Inventor]Hostetter, Carl F [Inventor]

关键词: HIGH VOLTAGES;    GEOLOGICAL SURVEYS;    MAGNETOMETERS;    SUBTRACTION;    TRANSMISSION LINES;    WARNING SYSTEMS;    BIOT-SAVART LAW;    LARGE SPACE STRUCTURES;    PATENTS;   

RP-ID  :  US-Patent-10,175,273, US-Patent-Appl-SN-14/856,090

学科分类：电子与电气工程

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

A high-voltage power transmission system is used as an extremely large antenna to extract spatiotemporal space, physical, and geological information from geomagnetically induced currents (GIC). A differential magnetometer method is used to measure GIC and involves acquiring line measurements from a first fluxgate magnetometer under a high-voltage transmission line, acquiring natural field measurements from a reference magnetometer nearby but not under the transmission line, subtracting the natural field measurements from the line measurements, and determining the GIC-related Biot-Savart field from the difference. NASA warning and alarm systems can be triggered based on determinations of GIC amplitude levels that exceed a set threshold value.