Browsing by Subject "Convertidors de corrent elèctric"
Now showing items 1-20 of 596
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A behavioural dynamic model for constant power loads in single-phase AC systems
(2021-09-01)
Article
Open AccessConstant power loads (CPLs) in power systems have a destabilizing effect that gives rise to significant oscillations or to network collapse, motivating the development of new methods to analyse their effect in AC and DC ... -
A Closed-loop capacitance to pulse-width converter for single element capacitive sensors
(2019)
Conference report
Open AccessA novel closed-loop capacitance-to-pulse width converter (CPC) suitable for single element capacitive sensors that use sinusoidal excitation is presented in this paper. Its operation is realized using a new configuration ... -
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 compact Thévenin model for a rectenna and its application to an RF harvester with MPPT
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-04-06)
Article
Open AccessThis paper proposes a compact Thévenin model for a rectenna. This model is then applied to design a high-efficiency radio frequency harvester with a maximum power point tracker (MPPT). The rectenna under study consists 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
(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 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 terminal and conventional sliding mode start-up peak current controls for a synchronous buck converter
(Institute of Electrical and Electronics Engineers (IEEE), 2019-08-20)
Article
Open AccessAn alternative to the linear control techniques, which are based on small signal averaged models, is the sliding mode control. That method uses instantaneous models of the switched power converter to design robust controllers. ... -
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 control technique for integration of DG units to the electrical networks
(Institute of Electrical and Electronics Engineers (IEEE), 2013-07)
Article
Restricted access - publisher's policyThis paper deals with a multiobjective control technique for integration of distributed generation (DG) resources to the electrical power network. The proposed strategy provides compensation for active, reactive, and ... -
A fast power calculation algorithm for three-phase droop-controlled-inverters using combined SOGI filters and considering nonlinear loads
(2022-10-07)
Article
Open AccessThe power calculation is an indispensable element in droop-controlled inverters because the bandwidth of the measured power has a direct impact on the controller performance. This paper proposes a fast and accurate power ... -
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 grounded-output 5-switch bipolar buck-boost converter topology for switching power amplifiers
(IEEE, 2011)
Conference report
Restricted access - publisher's policyThis work presents a switching converter topology which can boost and step down the supply voltage and can deliver both positive and negative voltages to a grounded load (bipolar converter topology with non-floating output). ... -
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 local stability condition for dc grids with constant power loads
(2017-07-01)
Article
Open AccessCurrently, there are an increasing number of power electronics converters in electrical grids, performing the most diverse tasks, but most of them, work as constant power loads (CPLs). This work presents a sufficient ... -
A low cost DSP-based control method for high frequency parallel resonant current-fed inverters
(2009)
Conference report
Open Access -
A modified partial power structure for quasi Z-source converter to improve voltage gain and power rating
(2019-06-01)
Article
Open AccessEmploying partial power processing (PPP) technique for quasi Z-source converter (QZSC) a new structure of the converter is presented. Using PPP technique although eliminates electrical insolation, but permits reducing ... -
A modulation strategy to operate multilevel multiphase diode-clamped and active-clamped DC-AC converters at low frequency modulation indices with DC-link capacitor voltage balance
(2017-10-01)
Article
Open AccessThis paper proposes a modulation strategy for multilevel multiphase diode-clamped dc–ac converters (also applicable to other functionally equivalent topologies) able to keep the dc-link capacitor voltages balanced under ... -
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 method to improve the total efficiency of parallel converters
(2013)
Conference report
Open AccessThis paper proposes a new methodology for efficiency optimization in systems composed by parallel converters. The proposed methodology takes into account the individual efficiency curves and determines the optimum ...
