Browsing by Subject "Phase-locked loops"
Now showing items 1-17 of 17
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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 family of gradient descent grid frequency estimators for the SOGI filter
(2017-09-04)
Article
Restricted access - publisher's policyThis paper applies the adaptive gradient descent method to the second-order generalized integrator (SOGI) filter in order to find an online estimation algorithm for the grid frequency, which leads to the proposal of three ... -
A pulsed carrier recovery using a discrete conception of the PLL
(Institute of Electrical and Electronics Engineers (IEEE), 1992)
Conference report
Open AccessA bistatic radar system requires accurate synchronization between the transmitter and the remote receiver in order to achieve a correct coherent target detection and positioning. An unlinked receiver carrier phase/frequency ... -
Comparative analysis of lattice-based all-pass filter and second order generalized integrator as orthogonal system generator of a pll
(2021-01-01)
Article
Open AccessThis paper presents a steady-state comparison of two methods that generate an orthogonal voltage system for a single-phase Phase-Locked Loop (PLL) structure: a widely accepted one based on a Second Order Generalized ... -
Derivative based inertia emulation of interconnected systems considering phase-locked loop dynamics
(2016)
Conference report
Restricted access - publisher's policyRecent trend of research is oriented in different methods of emulating the inertia to increase the sustainability of the system. In the case of dynamic performance of power systems especially in frequency control of ... -
Design, Fabrication and Veri cation of a Mixed-Signal XY Zone Monitoring Circuit and its Application to a Phase Lock Loop Circuit
(Universitat Politècnica de Catalunya, 2010-06)
Master thesis (pre-Bologna period)
Open AccessEl presente proyecto de final de carrera se centra en el diseño, análisis e implementación en silicio de una metodología de test/diagnosis basada en la comparación de firmas digitales generadas a partir de curvas de ... -
Diseño de un lazo de seguimiento de fase (PLL) usando aproximaciones del retardo fraccionario.
(Universitat Politècnica de Catalunya, 2017-01-12)
Bachelor thesis
Open Access -
Extended stability range of weak grids with Voltage Source Converters through impedance-conditioned grid synchronization
(2015)
Conference report
Open AccessThe stability range of power transfer in high impedance, weak, grids with Voltage Source Converters (VSC) can be extended a simple modification of the conventional Synchronous Reference Frame Phase Locked Loop (PLL) used ... -
Grid synchronization structure for wind converters under grid fault conditions
(2016)
Conference report
Restricted access - publisher's policyThis paper presents a grid synchronization structure for three-phase electric power systems based on the use of a filtered quadrature signal generator (FQSG) and a phase-locked loop (PLL) structure, named Adaptive Vector ... -
Grid voltage synchronization for distributed generation systems under grid fault conditions
(2015-07-01)
Article
Open AccessThe actual grid code requirements for the grid connection of distributed generation systems, mainly wind and photovoltaic (PV) systems, are becoming very demanding. The transmission system operators (TSOs) are especially ... -
Remote bistatic receiver synchronization using DLL techniques
(Institute of Electrical and Electronics Engineers (IEEE), 1992)
Conference report
Open AccessPulse to pulse staggering in the pulse reference interval (PRI), usually used to increase the radar unambiguous range and MTI blind speeds, complicates notably the synchronization of the pulsed waveform. A free running ... -
Sincronització de convertidors de potència connectats a xarxes febles mitjançant Sliding Modes Phase-Locked Loop
(Universitat Politècnica de Catalunya, 2022-07-28)
Bachelor thesis
Open AccessLa connexió de fonts renovables a la xarxa elèctrica s’acostuma a realitzar mitjançant dispositius d’electrònica de potència, coneguts com a onduladors o inversors. Aquests dispositius contenen elements de commutació i un ... -
Single-phase PLL based on an adaptive notch filter
(2020-09-01)
Article
Open AccessSingle-Phase Phase-Locked Loops (PLL) have become a crucial component of grid-tied power converters. PLL accuracy and fast response are important for control and protection purposes, especially in the presence of voltage ... -
Study of the PMSM modelisation for Hardware-in-the-Loop simulation applications
(Universitat Politècnica de Catalunya, 2021-02-10)
Master thesis
Open AccessThe master thesis exposed on the present document illustrates the development of a Permanent Magnet Synchronous Motor (PMSM) model for Hardware-in-the-Loop (HiL) applications. The real-time simulations employed in HiL have ... -
Three-phase phase-locked loop algorithms based on sliding modes
(Institute of Electrical and Electronics Engineers (IEEE), 2021-01-01)
Article
Open AccessThis article proposes a family of phase-locked loop schemes based on sliding modes. The use of sliding mode algorithms ensures fast response and global stability. In particular, two new algorithms are presented, both based ... -
Transient analysis of PV-based industrial microgrids between grid-connected and islanded modes
(2016)
Conference report
Restricted access - publisher's policyThis paper presents a networked control scheme for a photovoltaic-based industrial microgrid to adaptably operate in both grid-connected and islanded modes, and even to transfer smoothly between these two modes. The ... -
Variable-Frequency Grid-Sequence Detector Based on a Quasi-Ideal Low-Pass Filter Stage and a Phase-Locked Loop
(2010-09)
Article
Open AccessThis paper proposes a filtered-sequence phase-locked loop (FSPLL) structure for detection of the positive sequence in three-phase systems. The structure includes the use of the Park transformation and moving average ...
