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In recent years, advanced sensors, intelligent automation, communication networks, and information technologies have been integrated into the electric grid to enhance its performance and efficiency. Integrating these new technologies has resulted in more interconnections and interdependencies between the physical and cyber components of the grid. Natural(More)
The declining reliability of the US electric power system is raising major concerns amongst both politicians and power engineers in the USA. One of the reasons put forward by the North Electric Reliability Council (NERC) is the detrimental role played by the protection systems during large disturbances, which tend to help the perturbations to propagate(More)
—The vision of a smart grid is predicated upon pervasive use of modern digital communication techniques to today's power system. As wide area measurements and control techniques are being developed and deployed for a more resilient power system, the role of communication network is becoming prominent. Power system dynamics gets influenced by the(More)
— In the recent years, Phasor Measurement Unit (PMU) based Wide Area Measurement System (WAMS) has been receiving ever increasing attention from the academia as well as from the industry. Power utilities have been designing and implementing WAMS to provide more intelligent monitoring, control, and protection of the power grid. In order to achieve real-time(More)
better position the log on the carriage and improve the sawyer's decision-making ability. Adding external defect information to the optimization process is a natural extension of current technology. Our research focuses on determining a method of locating external defects on log surfaces. To accomplish this we employed a commercially available TriCam(More)
This paper summarises a study conducted by Virginia Tech for the American Lifelines Alliance (ALA) in 2005 to document interdependencies and impacts among utilities and transportation systems (lifelines) associated with the 2004 hurricane season in Florida. The greater Orange County, Florida area was chosen as the study area for the investigation, which(More)
This paper presents a new robust method to estimate the parameters of ARMA models. This method makes use of the autocorrelations estimates based on the ratio of medians together with a robust filter cleaner able to reject a large fraction of outliers, and a Gaussian maximum likelihood estimation which handles missing values. The main advantages of the(More)