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Phasor measurement units (PMUs) are beginning to be deployed widely in the power system, which gives system controllers the ability to directly measure phase angles. However, at present PMUs are only deployed at a small percentage of buses. This presents a challenge: how to get useful information from the small number of data points. This paper discusses work that has been done on visualizing the...
New technologies are increasing the vulnerability of the power system to cyber security threats. Dealing with these threats and determining vulnerabilities is an important task for utilities. This paper presents the development of a testbed designed to assess the vulnerabilities introduced by using public networks for communication.
Miniature fiber-optic temperature and pulsatile pressure probes have been fabricated using an optical phase modulation technique. These make use of a Fabry-Perot cell that allows the light to be transmitted to and returned from the sensor along a single optical fiber. Probes with diameters <0.75 mm and length approximately 1 cm for pressure and 2 mm for temperature have been demonstrated. Resolutions...
Fiber-optic magnetometers capable of achieving resolutions of 10/sup -11/ or 10/sup -12/ T are being developed. During initial tests, minimum detectable magnetic signals of <10/sup -10/ T have been demonstrated. These devices use optical-fiber-wound cylinders of magnetostrictive metallic glass in one arm of a Mach-Zehnder interferometer. Both single-axis and gradient magnetometers have been fabricated...
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