Documentos de Trabajo: Recent submissions
Now showing items 1121-1140 of 2480
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Impact of the q-axis sub-transient reactance on the rotor oscillations of a hydro generator
In the process of refurbishing a hydro generator, the owner has requested manufacturers to supply a machine that exhibits the same electrical parameters than the old one. The selected supplier has informed that such ... -
Highly sensitive dielectric resonator sensor for liquid characterization
This article describes a novel 2 GHz dielectric resonator sensor (DRS). The dielectric resonator is made of ceramic material and is fed by a microstrip transmission line, using the aperture-feeding method. The sensor shows ... -
Wind generation in weak systems
Control systems of wind generators are usually designed neglecting the effect of the external grid (the impedance of the grid is much smaller than the impedance of the step-up transformers). Wind generator manufacturers ... -
Islanding tests in medium voltage distribution systems with synchronous and non-synchronous generation
The increasing penetration of distributed generation is leading to a higher number of unintentional islands in distribution grids. Currently, islanded operation of distribution grids is not allowed, since it poses a threat ... -
Closed-loop two-stage stochastic optimization of offshore wind farm collection system
A two-stage stochastic optimization model for the design of the closed-loop cable layout of an Offshore Wind Farm (OWF) is presented. The model consists on a Mixed Integer Linear Program (MILP) with scenario numeration ... -
Web applications for PLC simulations: first steps towards PLC simulations-as-a-service
PLC (Power Line Communications) present a wide range of advantages that make them very appropriate for Smart Grid applications, such as that there is no need to deploy additional communication infrastructure. However, they ... -
Influence of PLL parameters on small-signal stability of microgrids with synchronous generators
Hybrid microgrids (MGs) with both renewable energy sources (RESs) and diesel-generator sets are used to guarantee the continuity of power supply in remote areas with no access to electricity networks. RESs are commonly ... -
Economic assessment of battery energy storage systems for reducing production deviations of wind farms
Battery Energy Storage Systems (BESSs) can increase the controllability of wind farms and, therefore, the incomes its operators obtain in the energy markets. More precisely, BESSs can be used to reduce the production ... -
A machine learning method applied to the evaluation of the condition in a fleet of similar vehicles
This paper presents a procedure for anomaly detection of temperatures in different key components of the power train in a fleet of similar vehicles. The anomaly detection is based on the characterization of the typical ... -
Method for condition characterization of industrial components by dynamic discovering of their pattern behaviour
This paper presents a method to assess the behavior of an industrial component by a set of typical patterns which characterize the normal behavior of the component. Once such patterns are defined they can be used both for ... -
The role of energy storage systems in expansion planning for low-inertia grids
On our path to a cleaner and ultimately carbon-free power system, energy storage technologies are bound to play an indispensable role. In this work, we assess the importance of storage in both market-based services (e.g. ... -
Prototype system for remotely monitoring and managing second-hand clothing collection containers
The current collection of second-hand clothes containers that Cáritas has distributed throughout the Community of Madrid presents some inefficiencies. Through the remotely monitoring of these containers, this project intends ... -
Dual-band metamaterial-inspired microwave sensor for liquid dielectric spectroscopy
In this paper, an open complementary split ring resonator (OCSRR)-loaded monopole antenna is used as a liquid sensor for discrimination of ethanol solvents with different concentrations. The resulting dual-band sensor is ... -
Impact of electric vehicle routing with stochastic demand on grid operation
Given the rise of electric vehicle (EV) adoption, supported by government policies and dropping technology prices, new challenges arise in the modeling and operation of electric transportation. In this paper, we present a ... -
A novel methodology to determine the new functionalities needed in the next generation of smart meters
This paper analyses the possible functionalities to be implemented in the second generation of smart meters for i-DE Redes Electricas Inteligentes S.A.U. These functionalities are proposed in the BIDELEK 4.0 project and ... -
Coordinated design of supplementary controllers in VSC-HVDC multi-terminal systems to damp electromechanical oscillations
High Voltage Direct Current Transmission (HVDC) systems are called to play an important role in modern electric power systems. Among the many aspects of HVDC currently under active research, this paper presents a proposal ...