Nonlinear Control of an AC-connected DC MicroGrid

New connection constraints for the power network (Grid Codes) require more flexible and reliable systems, with robust solutions to cope with uncertainties and intermittence from renewable energy sources (renewables), such as photovoltaic arrays. A solution for interconnecting such renewables to the main grid is to use storage systems and a Direct Current (DC) MicroGrid. A "Plug and Play" approach based on the "System of Systems" philosophy using distributed control methodologies is developed in the present work. This approach allows to interconnect a number of elements to a DC MicroGrid as power sources like photovoltaic arrays, storage systems in different time scales like batteries and supercapacitors, and loads like electric vehicles and the main AC grid. The proposed scheme can easily be scalable to a much larger number of elements.Comment: IEEE IECON 2016, the 42nd Annual Conference of IEEE Industrial Electronics Society, October 24-27, 201

Nonlinear Control of a DC MicroGrid for the Integration of Photovoltaic Panels

New connection constraints for the power network (Grid Codes) require more flexible and reliable systems, with robust solutions to cope with uncertainties and intermittence from renewable energy sources (renewables), such as photovoltaic arrays. The interconnection of such renewables with storage systems through a Direct Current (DC) MicroGrid can fulfill these requirements. A "Plug and Play" approach based on the "System of Systems" philosophy using distributed control methodologies is developed in the present work. This approach allows to interconnect a number of elements to a DC MicroGrid as power sources like photovoltaic arrays, storage systems in different time scales like batteries and supercapacitors, and loads like electric vehicles and the main AC grid. The proposed scheme can easily be scalable to a much larger number of elements.Comment: arXiv admin note: text overlap with arXiv:1607.0848

Supervisory hybrid model predictive control for voltage stability of power networks

International audienceEmergency voltage control problems in electric power networks have stimulated the interest for the implementation of online optimal control techniques. Briefly stated, voltage instability stems from the attempt of load dynamics to restore power consumption beyond the capability of the transmission and generation system. Typically, this situation occurs after the outage of one or more components in the network, such that the system cannot satisfy the load demand with the given inputs at a physically sustainable voltage profile. For a particular network, a supervisory control strategy based on model predictive control is proposed, which provides at discrete time steps inputs and set-points to lower-layer primary controllers based on the predicted behavior of a model featuring hybrid dynamics of the loads and the generation system

Discussion on:“Identification of Frequency of Biased Harmonic Signal”

International audienceFrequency estimation is a classical and difficult problem that has drawn much attention in the last decades, as may be seen in its extensive literature. It is as interesting from the application as from the theoretical point of view. Indeed there are many applications for such estimators in the fields of rotating systems control like disk drives; active vibration control for helicopters, planes and offshore oil platforms; reduction of acoustic noise produced by fans in air systems; among many others

Robust Adaptavie Transient Stabilization of a Synchronous Generator Uncertainty

International audienc

Discussion on: "Identification of frequency of biased harmonic signal"

International audienceFrequency estimation is a classical and difficult problem that has drawn much attention in the last decades, as may be seen in its extensive literature. It is as interesting from the application as from the theoretical point of view. Indeed there are many applications for such estimators in the fields of rotating systems control like disk drives; active vibration control for helicopters, planes and offshore oil platforms; reduction of acoustic noise produced by fans in air systems; among many others

Mise en place de session en pédagogie active associé aux Nouvelles Technologies pour l'Enseignement.: Retours d'expériences.

5 pages, bibliographie et webographieDepuis de nombreuses années, la pédagogie active est de plus en plus utilisée dans l'enseignement supérieur à différent niveau. Cet article présente un retour d'expérience au niveau L3 d'une session en pédagogie active de TD/TP associée à des dispositifs issus des Nouvelles Technologies de l'enseignement (NTE

Robust transient stabilisation problem for a synchronous generator in a power network

International audienceThe robust transient stabilisation problem (with stability proof) of a synchronous generator in an uncertain power network with transfer conductances is rigorously formulated and solved. The generator angular speed and electrical power are required to be kept close, when mechanical and electrical perturbations occur, to the synchronous speed and mechanical input power, respectively, while the generator terminal voltage is to be regulated, when perturbations are removed, to its pre-fault reference constant value. A robust adaptive nonlinear feedback control algorithm is designed on the basis of a third-order model of the synchronous machine: only two system parameters (synchronous machine damping and inertia constants) along with upper and lower bounds on the remaining uncertain ones are supposed to be known. The conditions to be satisfied by the remote network dynamics for guaranteeing L2 and L∞ robustness and asymptotic relative speed and voltage regulation to zero are weaker than those required by the single machine-infinite bus approximation: dynamic interactions between the local deviations of the generator states from the corresponding equilibrium values and the remote generators states are allowed

Modeling and conditional integrator control of an unmanned aerial vehicle for airlaunch

International audienceA satellite launching procedure known as air-launch is modeled and simulated at the staging phase, where a reusable unmanned aerial vehicle airlaunchs a second (rocket) stage. The airlaunch is modeled as a hybrid system with instantaneous jumps. This paper presents the effects of the variations in mass, inertia and aerodynamic coefficients on the stability of the airlaunch system at the stage separation. The airlaunch phase implies on perturbations on aerodynamic forces and moments that may bring the system unstable. For this reason a robust conditional integrator controller is designed with the objective of stabilizing the system during the airlaunch. Performance of the proposed control algorithm is illustrated through computer simulations