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This paper proposes an alternative algorithm to locate the optimal bus placement to integrate wind farms based on the criterion of minimizing the electrical losses using the solution of the power flow problem to identify the best connection point. The wind farm is modeled as a negative load being possible to connect this power generation to the possible connection buses and obtaining the power flow...
This paper describes the design and implementation of a system to evaluate the I/Q modulation when phase and amplitude imperfections are added. This system allows observing the signal behavior in the presence of phase and amplitude imbalance. An approach to correct I/Q imbalances using a power detector is proposed, by means calculating peak impairments in the interest signal and phase shifting is...
The energy consumption is justified by the man's need of having a comfortable survival, thus, the production, generation and power management is a clearly relevant and vital fact. This paper describes the development of a prototype system to carry out the measurement, monitoring and control of electrical charge whose application is purely residential, with the aim of not exceeding a certain limit...
A Passive Velocity-Field is a vector field defining a passive motion task in terms of velocity, i.e. a kinematic description of a desired trajectory to be followed by a mechanical system, and the attracting direction to reach it. This kind of fields was defined for control purposes to attain a high degree of coordination and synchrony between their different degrees of freedom of full actuated mechanical...
This paper presents a 3D Finite Element (FE) analysis of stray losses in core-type distribution transformers, where a magnetic shunt and a C-shape electromagnetic shield are utilized to protect a clamping frame of stray fluxes produced by high current leads (HCLs) of low voltage bushings. A real clamping frame of a three-phase core-type oil distribution transformer is utilized to study the electromagnetic...
In this paper, an empirical comparison of four micro differential evolution variants to solve partial instances of the Full Model Selection (FMS) problem on time-series databases is presented. Two smoothing methods, three time-series representations, and one classifier, all of them with their corresponding parameters, are optimized by the evolutionary search. The study focuses on the effects of the...
This paper shows the construction of an inexpensive telepresence robot. It includes, besides the mobility and the audio and video bidreccional communication, a 3D obstacle detection system using 2 cameras and a laser rangefinder. The system uses an arduino microcontroller to control two stepper motors coupled to the wheels and a Single Board Computer ODROID U3 for processing images, audio, video and...
In order for service robots to help humans in daily home tasks, they need to have a better understanding of their environment. Therefore, detection and localization of home furniture becomes a very important capability for them. This paper presents an approach to detect typical home furniture by an RGB-D sensor mounted on a mobile robot. The approach is based on the analysis of discriminant features...
A compact analytical model for junctionless nanowire transistors is developed taking into account the fin height and including its capacitance. This model is based on a previous one for double-gate transistors just considering the dependence of the fin height and the short channel effects. The validation has been performed by 3D simulations for structures of 15 nm and 10 nm of height obtaining a very...
A novel procedure to obtain micro and nanocrystals of Bi2Te3 is presented. The crystals are obtained by physical vapor transport using Bi and Te as sources. They were characterized by x-ray diffraction and scanning electron microscopy. Different kinds of structures as faceted crystals, strips and tubes were found at different temperatures. X-rays diffraction indicated that crystals were oriented with...
The paper presents a model for I–V characteristics of RRAMs based on Ni/HfO2/Si-n+ structures that can be easily implemented in SPICE. It describes the successive formation and rupture of one or several conductive filaments which are responsible for their behavior. For each filament an equivalent circuit is built upon a flux-controlled memristor model whose relationship between the charge and the...
The Motor Current Signature Analysis (MCSA), is one of the most used methods to diagnose failures on squirrel cage induction rotors. This paper presents the application of the MSCA to the experimental test results, performed on an initially healthy motor, which has several rotor bars progressively fractured. The tests were applied using a monitoring condition system, developed in LabVIEW®, designed...
This paper presents a documentary study about works related to the VSC-HVDC links reliability and availability assessment. The VSC-HVDC technology have proved to be a technical solution and cost effective choice to electric power transmission and occasionally it represents the only alternative to electric power transmission over the HVAC links to connect offshore wind-farms, for transmission over...
This paper addresses the analysis of inter-turn winding faults of a permanent magnet synchronous motor. The analysis methodology used to study inter-turn windings faults is based on the use of linear coupled circuits. The stator windings are resolved into harmonic conductor density distributions allowing the calculation of coupling impedances in the machine. Instantaneous Park's vector module was...
In this work was evaluated the application of geothermal energy, through the use of a heat exchanger for the air conditioning of a house of social interest with heat pumps. A system of geothermal heat pump is an alternative to be applied in air conditioning systems, due to the high value of the Coeficient Of Performance, both in cooling mode, as heating. The system operates through a vertical geothermal...
This paper presents a mathematical model of a wind turbine that includes a permanent magnet synchronous machine (PMSG) for real time simulations. The dynamic model considers a stochastic model of the wind, a state-space representation of the wind turbine with the PMSG, avoiding the use of a gear box, and a back-to-back converter for the interconnection of system with the grid. A field oriented control...
The use of low scale unmanned aerial vehicles (UAV) for various applications has been steadily increasing in the last years. As with any other aircraft, care should be taken in the design process in order to comply with airworthiness and safety requirements. In particular, the effect of wind gusts on these vehicles can lead to loss of maneuverability, control and system failure. It is shown that wind...
This work shows the results of a benchmarking study applied among the CFE-DCO 643 medium voltage circuits using “Data Envelopment Analysis” as a statistical tool for detect improvement areas at these circuits. Because of the different operative conditions of the electric network circuits between the rural and urban areas, a separated analysis for each of them was undertaken. Moreover, discrimination...
Over the past few years, power quality (PQ) monitoring has become an important topic because of the negative impact of different machines to the electrical network and to the susceptibility of critical equipment. There are different disturbances that affect the PQ; therefore, in order to apply a proper solution, these have to be correctly detected and classified. In general, signal processing techniques...
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