Browsing by Author "Rodríguez Cortés, Pedro"
Now showing items 1-20 of 344
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A communication-assisted protection scheme for direct-current distribution networks
(2016-05-27)
Article
Open AccessOne of the major issues associated with the implementation of direct-current distribution systems is the design of a proper protection scheme. The fault current characteristics in direct-current distribution systems are ... -
A communication: assisted protection for MVDC distribution systems with distributed generation
(2015)
Conference report
Open AccessIn this paper, a communication-assisted protection scheme is proposed for medium voltage dc (MVDC) distribution networks. MVDC grids are applicable for connection between microgrids, upgrading the transmission capacity of ... -
A comparative study of methods for estimating virtual flux at the point of common coupling in grid connected voltage source converters with LCL filter
(2017-08-23)
Article
Restricted access - publisher's policyGrid synchronization based on Virtual Flux (VF) estimation allows for control of grid-connected power converter without depending on AC-voltage measurements. This is useful in voltage-sensor-less applications for reducing ... -
A comparative study of methods for estimating virtual flux at the point of common coupling in grid connected voltage source converters with LCL filter
(2016)
Conference report
Open AccessGrid connected Voltage Source Converters (VSCs) with LCL filters usually have voltage measurements at the filter capacitors, while it can be important to control the active or reactive power injection at the grid-side of ... -
A control strategy for DC-link voltage control containing PV generation and energy storage — An intelligent approach
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference report
Restricted access - publisher's policyIn this paper, DC-link voltage control in DC microgrids with photovoltaic (PV) generation and battery, is addressed based on an intelligent approach. The proposed strategy is based on the modeling of the power interface, ... -
A generalized voltage droop strategy for control of multi-terminal DC grids
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Conference lecture
Restricted access - publisher's policyThis paper proposes a generalized voltage droop (GVD) control strategy for control and power sharing in voltage source converter (VSC)-based multi-terminal DC (MTDC) grids. In the proposed approach, the conventional voltage ... -
A generalized voltage droop strategy for control of multiterminal DC grids
(2015-02)
Article
Open AccessThis paper proposes a generalized voltage droop (GVD) control strategy for dc voltage control and power sharing in voltage source converter (VSC)-based multiterminal dc (MTDC) grids. The proposed GVD control is implemented ... -
A growing self-organising maps implementation for coherency identification in a power electronics dominated power system
(2020)
Conference lecture
Restricted access - publisher's policyThe presence of power electronics in today’s power systems strengthens due to the wider integration of renewable energy and energy storage systems. Subsequently, the dynamical response becomes harder to model and understand. ... -
A hierarchical control structure for multi-terminal VSC-based HVDC grids with GVD characteristics
(2013)
Conference lecture
Restricted access - publisher's policyThis paper presents a hierarchical control structure for Multi terminal HVDC grids. The hierarchical control structure is inspired by the three-layer control structure of largescale AC power systems and it is divided into ... -
A hybrid power flow controller for flexible operation of multi-terminal DC grids
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference report
Restricted access - publisher's policyThis paper develops a hybrid power flow controller (HPFC) to take one step forward for building future flexible DC transmission system (FDCTS). The idea for proposing HPFC is inspired by the successful operation of flexible ... -
A low-disturbance diagnostic function integrated in the PV arrays' MPPT algorithm
(IEEE, 2011)
Conference report
Restricted access - publisher's policyThis paper focuses on the estimation of series resistance changes for flat silicone PV panels or arrays during operation, without moving the operating point far away from the Maximum Power Point1. The method is based ... -
A new high-efficiency single-phase transformerless PV inverter topology
(IEEE Press. Institute of Electrical and Electronics Engineers, 2011-01)
Article
Open AccessThere is a strong trend in the photovoltaic inverter technology to use transformerless topologies in order to acquire higher efficiencies combining with very low ground leakage current. In this paper, a new topology, ... -
A new PWM strategy for grid-connected half-bridge active NPC converters with losses distribution balancing mechanism
(2015-01-09)
Article
Open AccessPhotovoltaic systems technological development is driven by the request for higher efficiency and safety. These concerns influence also the choice of the power converter stage. Several topologies have been proposed and ... -
A novel approach for voltage control of multi-terminal DC grids with offshore wind farms
(2013)
Conference lecture
Restricted access - publisher's policyThis paper proposes a novel control strategy in multi-terminal DC (MTDC) grids with offshore wind generation based on the idea of generalized voltage droop (GVD). In the proposed strategy, the GVD characteristics are ... -
A photovoltaic three-phase topology to reduce common mode voltage
(2010)
Conference report
Open AccessAt the present time most of the photovoltaic (PV) applications require to be integrated to the electrical grid. There are mainly two types of PV systems: with galvanic isolation (transformer) and transformerless. PV ... -
A proportional resonant controller tuning method for grid connected power converters with LCL+trap filter
(2014)
Conference report
Restricted access - publisher's policyThree-phase power converters are largely employed in power generation facilities based on renewable energy sources, and these converters commonly working in grid connection mode are frequently connected to the grid through ... -
A protection strategy for fault detection and location for multi-terminal MVDC distribution systems with renewable energy systems
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference report
Restricted access - publisher's policyA fault location method and a fault clearance strategy are presented in this paper for medium voltage dc (MVDC) distribution system. MVDC systems are applicable for connection between microgrids (MGs) and integration of ... -
A sensor-less sliding mode control scheme for a stand-alone wound rotor synchronous generator under unbalanced load conditions
(2004-09)
Article
Restricted access - publisher's policyThis paper presents a sliding mode control for a wound rotor synchronous machine acting as an isolated generator connected to an unbalanced load. In order to simplify the control methodology, the standard dq-model of the ... -
A simplified model for wind turbine based on doubly fed induction generator
(2011)
Conference report
Restricted access - publisher's policyImproving the Fault Ride Through capability (FRT) of Doubly Fed Induction Generators (DFIG) in wind power applications is a very important challenge for wind power industry. The mathematical models of such generators ... -
A simulation study of proportional resonant controller based on the implementation of frequency-adaptive virtual flux estimation with the LCL filter
(2015)
Conference report
Open AccessThis paper discusses the implementation of proportional resonant (PR) current controllers for a Voltage Source Converter (VSC) with LCL filter which is synchronized to the grid by virtual flux (VF) estimation with inherent ...
