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Recently, Flexible AC Transmission System (FACTS) — based devices have been used for power flow control and for damping power system oscillations. They can also be used to increase transmission line capacity; steady state voltage regulation; provide transient voltage support to prevent system collapse; and damp power oscillations. FACTS devices can be used in wind power systems to improve the transient...
This paper presents the application of multiple-objective particle swarm optimization (MOPSO) algorithm for solving the static reactive power dispatch (RPD) problem. The optimal RPD problem is a nonlinear multi-objective optimization problem which involves the simultaneous minimization of two objective functions. The first function is the total real power losses in transmission lines. While the second...
The present paper deals with the modeling and control of Wind Energy Conversion System WECS based Doubly Fed Induction Generator DFIG using the slip energy recovery principle. The proposed drive system uses a Direct Matrix Converter (DMC) to transfer the slip energy of the rotor into the mains instead of using cascaded ac-dc-ac converter whilst the stator side is fixed to the grid. Operation at both...
This paper discusses the steady-state analysis and performance of self-excited induction generators (SEIG) driven by regulated and unregulated turbines. For constant-speed operation, a simple technique is used for the determination of the electrical frequency. Where for SEIG driven by an unregulated turbine, The turbine characteristics and the SEIG speed-torque characteristics are experimentally verified...
This work presents the results and analysis of a power quality measurement realized in a large scale PV system. The evaluated system is a 1 MVA centralized PV plant with different technologies of photovoltaic panels and inverters. The power quality measurement was made in accordance with the Brazilian and international power quality regulation. The magnitudes measured were voltage, current, power,...
The worldwide adoption of smart meters that measure and communicate residential electricity consumption gives rise to the development of new energy efficiency services. Among these services, it is worth mentioning the ones related to energy saving. In this context it would be essential to know the energy daily profiles of the appliances of a public utility customer. These information can be obtained...
In this work, we present an experimental study of PV grid-connected system installed in the Faculty of Sciences of Tunisia. This system is composed by a PV generator, a buck-boost DC-DC converter, a voltage inverter and a grid utility. Two control lows are developed in this work. The first is the sliding mode control applied to the dc-dc converter in order to insure the required reference DC voltage...
The main objective of this paper is to achieve a comparative study between two and three-level converters used in transformerless grid connected two-stage photovoltaic systems. For this purpose, a numerical model of the conversion system has been implemented in Matlab/Simulink software. It consists of a PV array feeding a DC/DC converter as well as a three-phase voltage source converter that ensures...
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