Loss-of-mains protection is an important component of the protection systems of embedded generation. The role of loss-of-mains is to disconnect the embedded generator from the utility grid in the event that connection to utility dispatched generation is lost. This is necessary for a number of reasons, including the safety of personnel during fault restoration and the protection of plant against...

One of these testers, a 1980’s vintage logic test system required upgrading due to maintenance and obsolescence issues. The system had 64-Pin Electronics Cards (PEC), each with one Parametric Measurement Unit (PMU) and one functional channel for a total of 64 tester channels. A new PEC, designed by Fairchild with the assistance of students and staff of the University of New Hampshire, needed a ...

With the rapid growth of usage of phasor measurement units (PMUs) for modern power grids, the application of synchronized phasors (synchrophasors) to real-time voltage security monitoring has become an active research area. This paper presents a novel approach for fast determination of loading margin using PMU data from a wide-area monitoring system (WAMS) to construct the voltage stability bou...

BACKGROUND A widely held view in maternity services in rural Australia is they require 24-h on-site surgical and anaesthetic capability to be considered safe. This study aimed to provide a detailed description of three years of activity (2009-2011) of a rural maternity unit approximately 1h from the nearest surgical service. We describe the reasons for transfer to and from the unit, transfer ti...

Undulators serve as the primary source of radiation for modern storage rings, and more recently for the advent of Free-Electron Lasers (FELs). The performance of future FELs can be greatly enhanced using the much higher magnetic fields of superconducting undulators (SCU) [1]. For example, the LCLS-II hard x-ray undulator can be shortened by up to 70 m using an SCU in place of a PMU (permanent m...

Ideal hardware performance counters provide exact deterministic results. Real-world performance monitoring unit (PMU) implementations do not always live up to this ideal. Events that should be exact and deterministic (such as retired instructions) show run-to-run variation and overcount on x86 64 machines, even when run in strictly controlled environments. These effects are non-intuitive to cas...

Event detection and analytic calculations in both Wide Area Measurement Systems (WAMS) and in distribution systems including Phasor Measurement Unit (PMU) based microgrid control systems often use the independent components of the phasors (e.g. frequency or Voltage) rather than the vector representation of a phasor. This paper introduces the use of the discrete time complex Fourier Transform ba...

This paper introduces the efficient application of Virtual Reality (VR) technologies in the Architecture, Engineering and Construction (AEC) industry, where conventional plastic models are mainly used, which is called Physical Mock Up (PMU). An idea of Virtual Model (VM) is introduced in the paper. The VM consists of digital models added by digital information about the project, such as CAD dra...

A self-sustained multi-sensor platform for indoor environmental monitoring is proposed in this paper. To reduce the cost and power consumption of the sensing platform, in the developed platform, organic materials of PEDOT:PSS and PEDOT:PSS/EB-PANI are used as the sensing films for humidity and CO₂ detection, respectively. Different from traditional gas sensors, these organic sensing films can o...