Stability analysis and robust damping of multiresonances in distributed-generation-based islanded microgrids

International audienc

Adaptive Reference Trajectory for Power Quality Enhancement in Three-Phase Four-Wire Standalone Power Supply Systems with Nonlinear and Unbalanced Loads

International audienc

CONTROL AND MANAGEMENT OF A SOLAR-WIND HYBRID SYSTEM FOR POWER QUALITY IMPROVEMENT

The main aim of this paper is to present a modified Maximum Power Point Tracking (MPPT) control strategy of a solar-wind hybrid power system, which allows producing a maximum of energy while enhancing the produced power quality by reducing its fluctuation rate. Indeed, the Photovoltaic System (PVS) is based on a PV field of panels connected to the grid through a DC-DC and DCAC PWM converters and the Wind Energy Conversion System (WECS) is based on a stator field oriented Doubly Fed Induction Generator (DFIG) which its rotor is connected to the network via a back to back AC-DC-AC PWM converter. The proposed control strategy ensures a conventional Maximum Power Point Tracking (MPPT) for the WECS. Furthermore, it guarantees a smooth power injected in the grid by applying a modified MPPT technique applied to the PV system. This strategy uses a part of the PVS available power to compensate the WECS power fluctuations due to wind gusts and generates simultaneously the maximum of smoothed power from the residual part. The simulations results obtained in the case of the proposed control strategy have been compared to those of a conventional MPPT technique and of a Guaranteed Minimum Available Power (GMAP) control strategy. It is obvious that the proposed modified MPPT keeps a good compromise between the quantity and the quality of the total hybrid system produced power

Body Measurements of Donkeys of Poitevin and Catalan Breeds and their Crossbreds in Morocco

The study concerned the analysis of body measurements of 125 Poitevin (P), 107 Catalan (C) and 77 reciprocal crossbred (PxC et CxP) donkeys used in the national stud farms of Morocco. The donkeys were born between 1937 and 1973 in Morocco, France and Spain. The genetic type had a significant effect on all measurements studied except on the height at withers. Poitevin donkeys had a height at withers, heart girth, body weight, body length, substernal gap and front cannon bone circumference of 139.7 cm, 152.4 cm, 346.4 kg, 143.2 cm, 76.8 cm and 20.5 cm, respectively. Compared to Catalan donkeys the differences were – 0.5 cm, 2.7 cm, 15.7 kg, 3.7 cm, – 1.4 cm and 1.5 cm, and compared to crossbreds 1.4 cm, 2.3 cm, 14.2 kg, 5.1 cm, – 0.5 cm and 1.3 cm, respectively. The heterosis effect was significant for the body length (– 2.30%) and the front cannon bone circumference (– 2.78%) only. It was concluded that body measurements of Poitevin and Catalan donkey breeds were slightly different

A linear parameter variant Hinf controller design for a permanent magnet synchronous machine

International audienceno abstrac

Robust SoC Balancing Method for Distributed Storage based Islanded Microgrids

International audienc

Generalised voltage control for a multi-purpose switching mode converter

Abstract: In this paper, a single-phase switching mode converter acting as a unity power factor rectifier and/or as active power filter with no alteration in the topology is studied. A generalised voltage control taking in consideration the output power of the DC bus is developed. To demonstrate the improved response of the voltage regulator, a battery charger as “unknown dc load” is use

Interconnection and Damping Assignment Passivity Based Control for Power Sharing in Islanded Micro-Grids

International audienc

A Novel Global MPPT Algorithm for distributed MPPT Systems

International audienc

Interconnection and Damping Assignment Passivity for the Control of PV/Battery Hybrid Power Source in Islanded Microgrid

International audienc