Browsing by Author "0000-0001-5192-8587"
Now showing items 1-20 of 81
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A comparative study of techniques utilized in analysis of wind turbine data
Mazidi, Peyman; Mian, Du; Sanz Bobi, Miguel ÁngelPower produced by a wind turbine is dependent on many factors with different importance degrees. Main factors can be found by a thorough analysis of all the factors and their correlation and impact on the main output. ... -
A cumulative pollution index for the estimation of the leakage current on insulator strings
Santos, Héctor de; Sanz Bobi, Miguel Ángel (31/12/2020)The pollution performance of insulators installed in transmission and distribution lines plays a key role in maintaining the reliability, safety and cost-effectiveness of power systems. Among the different insulator ... -
A health condition model for wind turbine monitoring through neural networks and proportional hazard models
Mazidi, Peyman; Du, Mian; Bertling Tjemberg, Lina; Sanz Bobi, Miguel Ángel (01/10/2017)In this paper, a parametric model for health condition monitoring of wind turbines (HCWT) is developed. The study is based on the assumption that a wind turbine s (WT) health condition can be modeled through three features: ... -
A neural-based model for fast continuous and global robot location
Sánchez Miralles, Alvaro; Sanz Bobi, Miguel Ángel (01/07/2006)One of the problems in the field of mobile robotics is the estimation of the robot position in an environment. This paper proposes a model for estimating a confidence interval of the robot position in order to compare it ... -
A new methodology of fault location for predictive maintenance of transmission lines
Renatha N. da Silva, Paula; Max L.C. Negrão, Martín; Vieira Júnior, Petrônio; Sanz Bobi, Miguel Ángel (01/11/2012)This paper presents a new methodology for monitoring, in real-time, the conditions of the insulation of an power transmission line, detecting and locating anomalies in its operation, before the supply of power is interrupted, ... -
A performance and maintenance evaluation framework for wind turbines
Mazidi, Peyman; Du, Mian; Bertling Tjemberg, Lina; Sanz Bobi, Miguel ÁngelIn this paper, a data driven framework for performance and maintenance evaluation (PAME) of wind turbines (WT) is proposed. To develop the framework, SCADA data of WTs are adopted and several parameters are carefully ... -
A tool for the assessment of the electromagnetic forces in power distribution transformers
Da Costa Lopes, Andrey; Sanz Bobi, Miguel Ángel; Rouco Rodríguez, Luis; Palacios Hielscher, Rafael; Flores Losada, Luis; Cirujano Ballesteros, Pablo (01/10/2011)This paper compares the estimated electromagnetic forces due to short circuits in power transformers using two computational models. The first model is based on approximate analytical expressions of the electromagnetic ... -
An incipient fault detection system based on the probabilistic radial basis function network. Application to the diagnosis of the condenser of a coal power plant
Muñoz San Roque, Antonio; Sanz Bobi, Miguel Ángel (01/12/1998)This paper introduces the probabilistc radial function network (PRBFN) and a new incipient fault detection system based on it. The PRBFN is a neural network model able to estimate I/O mappings and probability density ... -
Anomaly detection indicators of a wind turbine gearbox based on feature extraction from its vibration performance
Martínez Montaña, Miguel; Sanz Bobi, Miguel ÁngelThis paper proposes a method for obtaining several health condition indicators for wind turbines based on vibration data driven from two similar experimental turbines (damaged and healthy). These indicators are able to ... -
Anomaly indicators for Kaplan turbine components based on patterns of normal behavior
Sanz Bobi, Miguel Ángel; Welte, Thomas Michael; Eilertsen, LasseThis paper describes and proposes some indicators for continuous monitoring of anomalous conditions in the hydraulic system of a Kaplan turbine using SCADA data. The indicators are based on significant deviations between ... -
Application of clustering methods for discovering patterns of energy use in regional areas for the residential sector
Gelabert Costacurta, Laura; Sanz Bobi, Miguel ÁngelToday the wide and increasing implementation of smart meters on the household level is making it possible to better know the use of electricity by residential consumers. This contributes to improving the quality of the ... -
Asset management overview focusing on fault detection in industrial processes - A state of the art
García Matos, Jesús Ángel; Sanz Bobi, Miguel Ángel; Muñoz San Roque, Antonio (01/04/2013)The current energetic and economic context brings the need of a proper management of power generation facilities and components. This paper is intended to provide a wide view of the state of the art in asset management, ... -
Auto-regressive processes explained by self-organized maps: application to the detection of abnormal behavior in industrial processes
Brighenti, Chiara; Sanz Bobi, Miguel Ángel (12/12/2011)This paper analyzes the expected time evolution of an auto-regressive (AR) process using self-organized maps (SOM). It investigates how a SOM captures the time information given by the AR input process and how the transitions ... -
Behavior anomaly indicators based on reference patterns - application to the gearbox and electrical generator of a wind turbine
Gil Ramil, Ángel; Sanz Bobi, Miguel Ángel; Rodríguez López, Miguel Ángel (01/01/2018)This paper presents indicators of non-expected behavior in components of a wind turbine. These indicators are used to alert about the working conditions of these components that are not usual, according to the normal ... -
CLELIA: a multi-agent system for Publishing printed and electronic media
Arranz Matia, Antonio Luis; Sanz Bobi, Miguel Ángel (01/05/2005)This paper describes a multi-agent system (MAS) for automatic publication of information in both printed and electronic media. The main objective is to have a document ready to be displayed (and printed) at every stage of ... -
Component stress evaluation in an electrical power distribution system using neural networks
Sanz Bobi, Miguel Ángel; Andrade Vieira, Rodrigo José; Brighenti, Chiara; Palacios Hielscher, Rafael; Nicolau, Guillermo; Ferrarons, Pere; Vieira Junior, Petronio (Springer (Berlín, Alemania), 15/06/2010) -
Condition monitoring and maintenance methods in wind turbines
Andrade Vieira, Rodrigo José; Sanz Bobi, Miguel Ángel (Springer (Berlín, Alemania), 09/05/2014) -
Control and diagnosis of water chemistry in the water-steam and water make-up in a fossil fuelled power plant
Sanz Bobi, Miguel Ángel; Pérez Arriaga, José Ignacio; Serrano Carbayo, José Luis; Ortiz Alfaro, María Empar; Alba Ríos, Juan José; Doménech Pujol, Álvaro; Villamediana Díez, María Jesús; González-Huerta, J.; Fernández-Martínez, J.J. (01/08/1994)This paper presents the expert system SEQA (the Spanish initials for Water Chemistry Expert System) for the control and diagnostic of the chemical properties of the water-steam and water make-up treatment systems in a ... -
DADICC: Intelligent system for anomaly detection in a combined cycle gas turbine plant
Arranz Matia, Antonio Luis; Cruz García, Alberto Miguel; Sanz Bobi, Miguel Ángel; Ruiz Castelló, Pablo; Coutiño, Josué (01/05/2008)DADICC is the abbreviated name for an intelligent system able to detect on-line and diagnose anomalies as soon as possible in the dynamic evolution of the behaviour of a power plant based on a combined cycle gas turbine. ... -
DIAMOND - Distributed Multi-Agent Architecture for Monitoring and Diagnosis
Wörn, Heinz; Längle, Thomas; Albert, Martin; Kazi, Arif; Brighenti, Attilio; Revuelta Seijo, Santiago; Senior, Christopher; Sanz Bobi, Miguel Ángel; Villar Collado, José (01/03/2004)This paper presents a new concept for building up a monitoring and diagnosis system for complex industrial application. For this purpose, a multi-agent architecture was developed that employs the FIPA-ACL (Agent Communication ...