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Evaluation of reliability is very important entity for the design and operation of systems. The safety, dependability, availability, Mean Time To Failure (MTTF), Mean Time Between Failure (MTBF), Mean Time To Repair (MTTR) and life cycle of the designed system can be judged from this reliability evaluation. For simple systems, the evaluation is straightforward. However, for complex systems, an algorithmic...
Smart meters are key components of the smart grid infrastructure, connecting households to utility providers. With Internet connectivity to such devices, the smart grid Advanced Metering Infrastructure (AMI) is exposed to attacks by the adversary class. Any compromise of a smart meter may jeopardize the security of not just the household in question, but also the entire neighborhood network and possibly...
In this paper, a low pass conditioning filter in the dq synchronous reference frame that removes noise and oscillation from the control signals of the DFIG controllers is proposed. The cutoff frequency of the conditioning filter is based on the power transfer matrix of the DFIG system. The power transfer matrix elegantly linearizes the DFIG's state space matrices using small signal approximation....
This paper presents an interactive, intelligent and automatic web educational application for an academic advising system. The application is used to promote the learning method and enhance the development of students by identifying and achieving their academic goals automatically. Such new application assists to avoid the problems of the manual version of the academic advising system and automate...
New model-reduction numerical procedure for a class of stable nonlinear systems is proposed. The proposed design is devoted to a spacial class of nonlinear systems whose nonlinearities are not necessarily Lipschitz with respect to its arguments. Additionally, the systems under consideration may contain uncertain parameters, having known lower and upper bounds. The computation of the reduced-model...
The methods of correction of the phase angle error of the phase splitters (PS) of microwave band based on the differential stage designed for quadrature demodulators of the modern communication systems are suggested. The synthesis strategy of circuits of correction of the second order providing reduction of the amplitude-dependent phase shift up to 1–2 degree between the output signals of PS in the...
Tapping-off a small amount of power from an HVDC transmission line to a three-phase local grid can be achieved by using shunt or series HVDC taps. This paper proposes a new grid-connected HVDC shunt tap. The proposed tap uses series-input, parallel-output multi-module 2-level voltage source converters (VSCs) as an alternative to the conventional single DC-to-AC voltage source converter (VSC) followed...
Circuit design features of integrated active band-pass RC and RLC filters with low pole-Q and pole-fp sensitivity are considered. The architectures of RC and RLC filters on base of current amplifiers are discussed. Circuits and simulation results of the integrated filters on IHP 0.25 µm SiGe process are given.
This article reviews the circuit methods for the construction of the temperature-stable voltage references with the use of base of npn-type and pJFET transistors. The new circuitry of the voltage references is suggested for BiFET technology which renders possible to create microelectronic products with the radiation hardness up to 1 Mrad and F=1013 ÷ 1014 n/cm2 acceptable for many applications.
In Coordinated Multi-Point (CoMP) networks, Base Stations (BSs) cooperatively process User Equipment (UE) connected to multi-points to eliminate the inter-cell interference. CoMP networks convert the interference signal into useful information by controlling the interfering signals among adjacent cells. This is important for UEs at the cell edge. This paper examines practical deployment of CoMP and...
Nature enthused algorithms are the most potent for optimization. Cuckoo Search (CS) algorithm is one such algorithm which is efficient in solving optimization problems in varied fields. This paper appraises the basic concepts of cuckoo search algorithm and its application towards the segmentation of brain tumor from the Magnetic Resonance Images (MRI). The human brain is the most complex structure...
Linear generators have been proposed as a proper power take-off system for direct-drive wave energy conversion. Coupled directly to a reciprocating wave energy device, it was proposed that linear generators could replace hydraulic and pneumatic systems. Here we established the design and performance evaluation of a permanent magnet linear generator that implements Halbach array arrangement. The designed...
The use of battery electric vehicles (BEV) has not seen equal treatment across the US with consumers in non-urban and rural areas reporting themselves as the least likely group to consider purchasing a BEV. Studies show that rural customers are more susceptible to longer daily driving distances, insufficient charging infrastructure, and lower consumer awareness, all of which decrease BEV adoption...
This paper investigates the problem of practical finite-time trajectory tracking and practical finite-time stabilization of two important classes of dynamical systems by means of C(∞) feedbacks. It is shown that Hamiltonian mechanical systems and systems in strict feedback form can be made globally finite-time stable by smooth parameterized feedbacks. We show that we could bring all the trajectories...
Many investigations have been conducted in the field of noninvasive blood-glucose concentration measurement yet; none seem to meet the standards of comfort, accuracy and safety. This paper presents the preliminary outcomes of our investigations into the potential of using nuclear magnetic resonance (NMR) principles for the noninvasive measurement of blood glucose level in humans. The initial phase...
Voltage stability analysis of a power system is a necessity, particularly in the planning phase of the development or expansion of a power network. The ultimate goal of this paper is to investigate the voltage stability of Musandam (an area in the Sultanate of Oman) micro-grid during the expansion of the network. A micro-grid is normally composed of relatively small-distributed generators supplying...
New technologies are affecting many different aspects of our lives. Social media is one of these, and has revolutionized communication between governments and their citizens. Both governments and citizens are benefitting through this social interaction, which has resulted in more effective services being offered to citizens.
Power system stability studies are required for both planning and operation of power networks. Its importance has become more vital due to high dimensionality and complexity of modern power systems. In this paper a review of power system stability is presented. The effects of renewable energy sources to the integrated power systems are highlighted. The paper considers the main interconnected system...
Economic Dispatch is an important optimization problem in power system planning. This article presents an overview of the economic dispatch problem, its formulation, and a comparison of addressing the problem between the vertically integrated market and the liberalized market environments.
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