Browsing by Subject "Corrents continus"
Now showing items 21-39 of 39
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Harmonic interactions in HVAC-connected offshore windfarms
(Universitat Politècnica de Catalunya, 2019-07-12)
Master thesis
Open AccessThe connection of new Offshore Wind Power Plants (OWPP) in the existing Dutch transmission system gives rise to many technical challenges. For example, it is expected that harmonic issues will occur more frequently when ... -
HVDC-based modular multilevel converter in the STATCOM operation mode
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Conference report
Restricted access - publisher's policyIn a futuristic vision, deeply interconnected ac and dc networks are expected, which would be restructured over the time in order to maximize the power transmission efficiency. In some grid configurations, grid-tied inverters ... -
Inertia emulation in AC/DC interconnected power systems using derivative technique considering frequency measurement effects
(2017-09-05)
Article
Open AccessVirtual inertia is known as an inevitable part of the modern power systems with high penetration of renewable energy. Recent trend of research is oriented in different methods of emulating the inertia to increase the ... -
Modelado de instalaciones HVDC
(Universitat Politècnica de Catalunya, 2015-06-10)
Bachelor thesis
Restricted access - author's decision -
Modelització i control de sistemes de transmissió VDC-HVDC per parcs eòlics marins
(Universitat Politècnica de Catalunya, 2014-06-11)
Bachelor thesis
Open AccessProjecte realitzat per tal d’optar a la titulació d’Enginyeria Elèctrica. El projecte tracta l’estudi d’un convertidor VSC-HVDC com a sistema de transmissió d’energia per parcs eòlics marins. En el present document es ... -
Modelització, control i simulació de xarxes multiterminal de transport d'energia elèctrica en corrent continu (HVDC-VSC)
(Universitat Politècnica de Catalunya, 2010-06)
Master thesis (pre-Bologna period)
Open AccessAquest projecte presenta un estudi de modelització, disseny de controladors i mètodes d'operació d'una xarxa multiterminal en corrent continu. També es realitzen un seguit de simulacions, amb l'eina informàtica MATLAB-SIMULINK ... -
Modelización de un motor DC
(Universitat Politècnica de Catalunya, 2019-06-18)
Bachelor thesis
Restricted access - author's decision
Covenantee: Institut universitaire de technologie d'Aix-Marseille -
Modelling and simulation of an insular grid with the presence of High Voltage Direct Current
(Universitat Politècnica de Catalunya, 2018-06-21)
Bachelor thesis
Open AccessInsular electrical grids, usually isolated from larger mainland grids, are more prone to having stability issues. These are usually weak and have limited resources in regards to power sources, which adds up with the fact ... -
Multilevel modular DC/DC converter for regenerative braking using supercapacitors
(2012-07-31)
Conference report
Open AccessRegenerative braking is presented in many electric traction applications such as electric and hybrid vehicles, lifts and railway. The regenerated energy can be stored for future use, increasing the efficiency of the system. ... -
Multiport interline current flow controller for meshed HVDC grids
(Institute of Electrical and Electronics Engineers (IEEE), 2020-07-01)
Article
Restricted access - publisher's policyIn meshed high voltage direct current grids, the current of each line cannot be controlled independently, since it depends on the resistances between nodes. Additional devices, such as current flow controllers (CFCs), may ... -
On the performance of the energy-controlled MMC: impact of the Internal and the DC capacitances in HVDC applications
(2019)
Conference report
Restricted access - publisher's policyAs the power system is evolving towards a cleaner energy generation framework, the penetration of power electronic devices into the grid has become an evident fact. The number of commissioned VSC-HVDC installations is ... -
Optimal dc voltage and current control of an lcc hvdc system to improve real-time frequency regulation in rectifier-and inverter-side grids
(2020-11-01)
Article
Open AccessHigh-voltage direct-current (HVDC) systems for constant or intermittent power delivery have recently been developed further to support grid frequency regulation (GFR). This paper proposes a new control strategy for a ... -
Optimal sizing and location of reactive power compensation in offshore HVAC transmission systems for loss minimization
(2019)
Conference lecture
Open Access -
Overvoltages in DC urban light railway systems: Regenerative braking characterization
(Universitat Politècnica de Catalunya, 2020-03-31)
Bachelor thesis
Restricted access - author's decision
Covenantee: Politecnico di TorinoDC light railway systems are used for public transportation in many cities worldwide. For these DC tram networks, the Traction Electrification System (TES) is normally fed by power substations, which contain the ... -
Passivity-based control of multi-terminal HVDC systems under control saturation constraints
(2015)
Conference report
Restricted access - publisher's policyThis paper proposes a decentralized, passivity-based cont rol design for power stations in a multi-terminal High Voltage Direct Current transmissi on system. The control algorithm is shown to asymptotically stabilize the ... -
Positive- and negative-sequence control of grid-connected photovoltaic systems under unbalanced voltage conditions
(2013)
Conference report
Open AccessThis paper discusses the control of the positive- and negative-sequence components of a large-scale grid-connected photovoltaic system (GCPS) under unbalanced voltage sag conditions in the grid. Some issues regarding ... -
Reducing circulating currents in interleaved converter legs under selective harmonic elimination pulse-width modulation
(2015)
Conference report
Open AccessInterleaving of voltage source converter legs enables higher output currents per phase, effectively increasing the power rating without increasing semiconductor ratings. Different switching patterns between the converter ... -
Start-up of virtual synchronous machine: methods and experimental comparison
(2018)
Conference report
Open AccessA modern grid is smarter mainly in the advance in information and communication technologies, while the power processing mechanism does not make a big difference. To make a modern grid smarter, the grid control should be ... -
Study of the stability of a direct stator current controller for a doubly fed induction machine using the complex hurwitz test
(2013-11)
Article
Restricted access - publisher's policyIn this brief, a new control scheme is presented for the doubly fed induction machine (DFIM). The proposed control algorithm offers the advantages of proven stability and remarkable simplicity. In contrast to the classical ...
