Showing papers by "Marco Liserre published in 2010"

Future Energy Systems: Integrating Renewable Energy Sources into the Smart Power Grid Through Industrial Electronics

Abstract: This paper discusses about integrating renewable energy sources into the smart power grid through industrial electronics. This paper discusses photovoltaic power, wind energy conversion, hybrid energy systems, and tidal energy conversion.

Renewable Energy Operation and Conversion Schemes: A Summary of Discussions During the Seminar on Renewable Energy Systems

Abstract: A short summary of some speeches given during Seminar on Renewable Energy system (SERENE) is presented. The contributions have been mainly focused on power electronics for photovoltaic (PV) and sea wave energies, pointing out some aspects related to efficiency, reliability, and grid integration. Finally, main issues concerning fuel cell (FC) systems as generators based on hydrogen as a low environmental impact energy vector are presented.

Monitoring and synchronization techniques for single-phase PV systems

Abstract: In order to meet standard specifications in terms of power quality and safety for grid-connected systems the phase angle, the amplitude and the frequency of the grid voltage are a critical piece of information. Phase locked loop (PLL) algorithms are very important for grid synchronization and monitoring in most of the grid-connected power converters system. This paper presents a performance comparison of single-phase synchronization techniques: Synchronous Reference Frame-Phase Locked Loop (SRF-PLL), Enhanced Phase-Locked-Loop (EPLL), Quadrature-Phase Locked Loop (QPLL) and Second-Order Generalized Integrator - Phase Locked Loop (SOGI-PLL).

Analysis of a universal inverter working in grid-connected, stand-alone and micro-grid

Abstract: Inverters are a universal interface to inject the power produced by distributed power generation in stand-alone loads, micro-grid or the main electrical grid. The control system of a universal inverter should be designed in order to manage the different connections. This paper is an attempt to provide an overview with attention paid to current/voltage control of the converter and direct/inverse droop control of active and reactive power control.

Power electronics for PV power systems integration

Abstract: Future PV power converters should ensure smart and efficient integration of PV energy into existing electrical networks. To achieve this goal, new essential issues should be addressed by engineers and researchers. This tutorial, divided into 3 parts.

Management of grid-inverter outages and power quality disturbances in distributed power generation systems

Abstract: Distributed power generation systems (DPGS) are based on the grid-converters as interface between the source and the grid. They require a control strategy is designed in order to guarantee system stability and reliability. The effect of converter outages should be properly studied as well as the effect of power quality disturbances. The aim of this paper is to provide a comprehensive analysis of these conditions through simulation and experimental results.

Harmonic compensation in shunt active power filters by applying kalman filtering for estimation of the averaged load conductance

Abstract: Load current components which contribute to non-active power consumption in electrical systems increase losses in distribution lines and reduce the power system efficiency. Shunt active power filters (APFs) can be employed to reduce the non-active power flow and, due to their characteristics, are more effective than passive filters under dynamical conditions. The main drawback of SAPFs is the controller complexity, which must evaluate the instantaneous values of the compensation current and ensure that the injected current at the point of common coupling (PCC) of the SAPF, the electrical grid and the distorting load, matches the reference one.

Particle Swarm Optimization of a universal inverter

Abstract: Universal inverters will be the future interface of distributed generation to power systems based on active distribution grid where island operation should be allowed. Universal inverters should be able to work both connected to the grid both in island mode. A self-commissioning process based on advanced optimization algorithms should tune the parameters of the controllers to manage the different conditions and the transition among them. In this paper it is proposed to use the Particle Swarm Optimization that is based on social behavior. The method does not use gradients and the population update is based on simple dynamic trajectories.