El grup de recerca estudia la qualitat en el subministrament elèctric, és a dir, les desviacions de la tensió i/o el corrent de la seva situació ideal amb forma d'ona sinusoïdal de magnitud i freqüència concretes. Bàsicament, s'estudien tres tipus de pertorbacions en la qualitat de subministrament elèctric: la distorsió harmònica, els sots de tensió, i els desequilibris trifàsics. El grup també ha desenvolupat una valuosa tasca, amb reconeixement de la comunitat científica, en l'estimació dels paràmetres de les màquines elèctriques.
Així mateix, el grup està treballant en l'actualitat en:
(1) l'estabilitat i la protecció de xarxes de MT amb generació distribuïda,
(2) xarxes en corrent continu (HVDC y MVDC),
(3) l'efecte de la integració de les energies renovables en l'estabilitat de la xarxa i en el seu sistema de proteccions.

The group studies power quality, i.e. the deviations of voltage and/or current from the ideal situation of a sine wave that is constant in magnitude and frequency. Basically, three types of power quality disturbances are studied: harmonic distortion, voltage sags and three-phase unbalance. Harmonic distortion is produced when voltage and current waveforms are non-sinusoidal but periodic, due to the presence of nonlinear loads in electrical power systems. Voltage sags are short-duration reductions in rms voltage caused by short-circuits in the system. Three-phase unbalance is produced when the three-phase voltages and currents are not symmetrical and/or balanced due to the presence of unbalanced loads in electrical power systems.

The group studies power quality, i.e. the deviations of voltage and/or current from the ideal situation of a sine wave that is constant in magnitude and frequency. Basically, three types of power quality disturbances are studied: harmonic distortion, voltage sags and three-phase unbalance. Harmonic distortion is produced when voltage and current waveforms are non-sinusoidal but periodic, due to the presence of nonlinear loads in electrical power systems. Voltage sags are short-duration reductions in rms voltage caused by short-circuits in the system. Three-phase unbalance is produced when the three-phase voltages and currents are not symmetrical and/or balanced due to the presence of unbalanced loads in electrical power systems.

Recent Submissions

  • Advanced quiz development for students’ self-learning in power generation, transmission and distribution 

    Bogarra Rodríguez, Santiago; Corbalán Fuertes, Montserrat; Plaza, Inmaculada (SAGE PUBLICATIONS INC, 2019)
    Article
    Restricted access - publisher's policy
    Students’ learning can be improved by using online quizzes with a valuable feedback, especially in large groups, making it very interesting for engineering subjects which are based on mathematics. This paper presents the ...
  • Voltage recovery influence on three-phase grid-connected inverters under voltage sags 

    Rolán Blanco, Alejandro; Giménez, Pablo; Yague, Sauro J.; Bogarra Rodríguez, Santiago; Saura Perisé, Jaime; Bakkar, Mostafa (2019-02-12)
    Article
    Open Access
  • DC-DC buck converter parameter identification based on a white-box approach 

    Balakrishnan, Hariharan; Moreno Eguilaz, Juan Manuel; Riba Ruiz, Jordi-Roger; Bogarra Rodríguez, Santiago; García Espinosa, Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference lecture
    Open Access
    This paper proposes to use a white-box approach to identify the parameters of an electronic DC-DC buck converter. It discretizes the differential equations governing the dynamic of such system, which are used to identify ...
  • Impedance-based analysis of harmonic instabilities in HVDC-connected Offshore Wind Power Plants 

    Cheah Mañé, Marc; Sainz Sapera, Luis; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol (2019-03-01)
    Article
    Restricted access - publisher's policy
    HVDC-connected Offshore Wind Power Plants (OWPPs) with a large number of power converters are prone to instabilities due to interactions with converter controllers. This paper analyzes harmonic instabilities in OWPPs ...
  • Parameter identification of DC-DC converters under steady-state and transient conditions based on white-box models 

    Riba Ruiz, Jordi-Roger; Moreno Eguilaz, Juan Manuel; Bogarra Rodríguez, Santiago; García Espinosa, Antonio (2018-12-05)
    Article
    Open Access
    This paper proposes a white-box approach for identifying the parameters of DC-DC buck and boost switch mode power converters. It is based on discretizing the differential equations that describe the dynamic behavior of the ...
  • Detailed off-line parameter identification of synchronous generator based on frequency response tests 

    Bogarra Rodríguez, Santiago; García Espinosa, Antonio; Moreno Eguilaz, Juan Manuel; Riba Ruiz, Jordi-Roger (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference lecture
    Open Access
    This work presents a general methodology, based on standstill frequency response tests. Once the circuit topology is chosen, it allows a systematic calculation of the circuit parameters for a salient pole synchronous ...
  • Modeling and control of a three-phaseg grid-connected inverter under fault conditions 

    Rolán Blanco, Alejandro; Giménez Febrer, Pedro Juan; Yague, Sauro J.; Bogarra Rodríguez, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    The aim of this paper is to study the behavior of a three-phase inverter with an RL filter powered by a renewable energy source and connected to a grid under fault conditions. The novelty of the work lies in proposing a ...
  • Harmonic resonance stability of aeronautical ground lighting systems 

    Vidal, Daniel; Monjo Mur, Lluís; Sainz Sapera, Luis (Institute of Electrical and Electronics Engineers (IEEE), 2018-12)
    Article
    Restricted access - publisher's policy
    Aeronautical ground lighting (AGL) systems assist aircraft pilots in airport operations. These systems are singlephase series circuits where constant current regulators (CCRs) feed luminaires with an adjustable rms current. ...
  • Power control strategies during voltage sags according to Spanish grid code 

    Bogarra Rodríguez, Santiago; Córcoles López, Felipe; Saura Perisé, Jaime; Moreno Eguilaz, Juan Manuel; Bakkar, Mostafa (2018)
    Conference report
    Open Access
    In order to connect any power converters into the grid there are some grid requirements to insure the safe operation of the grid. So, the control of the converters especially during abnormal ...
  • Multi-objective design optimization using dual-level response surface methodology and booth's algorithm for permanent magnet synchronous generators 

    Asef, Pedram; Bargalló Perpiñá, Ramón; Barzegaran, M.R.; Lapthorn, Andrew; Mewes, Daniela (2017-11-22)
    Article
    Restricted access - publisher's policy
    This paper studies a dual-level response surface methodology (DRSM) coupled with Booth's algorithm using a simulated annealing (BA-SA) method as a multi-objective technique for parametric modeling and machine design ...
  • Positive-net-damping stability criterion in grid-connected VSC systems 

    Sainz Sapera, Luis; Cheah Mañé, Marc; Monjo, Luis; Liang, Jun; Gomis Bellmunt, Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2017-12-01)
    Article
    Open Access
    Resonance instabilities in power systems can be assessed with the positive-net-damping stability criterion. This criterion is a review of the complex torque coefficients method, but it does not provide the frequency of the ...
  • Resonance-based procedure for locating failed luminaires in AGL systems 

    Vidal, Daniel; Monjo, Luis; Sainz Sapera, Luis (2018-02)
    Article
    Open Access
    IEEE Aeronautical ground lighting (AGL) systems provide a visual reference for aircraft during airport operations. Fast detection and location of failed luminaires is an important safety concern in AGL systems. In the event ...

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