Doctorant sous la direction de R. ORTEGA

Titre de la thèse: Stability analysis of electrical networks containing constant power loads.
Résumé de la thèse: This thesis is concerned with the stability analysis of electrical networks (ac, dc, and hybrid) containing constant power loads (CPLs), which model the behavior of tightly regulated devices such as controlled power electronic converters or motor drives in advanced automotive systems. A CPL is said to have a negative impedance characteristic, meaning that when the input current increases (decreases) the input voltage decreases (increases). It is well-known that this negative impedance characteristic has a destabilizing effect that gives rise to significant oscillations or to network collapse. With an ever increasing presence of electronic devices and CPLs, this is a particularly concerning problem in today's power grid. Within the last decade, a number of research works have been done to overcome the CPLs instability issue. However, most of that work was oriented to the study of small or device-level networks. Therefore, a comprehensive over-all stability analysis for large networks containing several CPLs remains an open problem. The objective of this thesis work is to analytically assess and warranty the stable operation of general electrical networks containing a set of distributed CPLs.

 

Journal articles:

J1. An Adaptive Passivity-Based Controller of a Buck-Boost Converter With a Constant Power Load, in Asian Journal of Control (in review), in collaboration with We He, Romeo Ortega, and Li Shihua.

J2.  On Existence of Equilibria of Multi-Port Linear AC Networks With Constant-Power Loads, published in IEEE Transactions on Circuits and Systems I: Regular Papers (23 May 2017), in collaboration with Robert Griñó, Nikita Barabanov, Romeo Ortega, and Boris Polyak.

J3. Modeling and finite time walking control of a biped robot with feet, published in Mathematical Problems in Engineering, Vol. 2015 , in collaboration with Dr. Héctor Becerra and Dr. Mónica Moreno.

 

Conference articles:

C1. Control of a 7-link biped robot using a twisting algorithm, published in proceedings of the XVI LATINAMERICAN CONTROL CONFERENCE (CLCA ’2014) , in collaboration with Dr. Héctor Becerra and Dr. Mónica Moreno.

C2. Modeling and voltage-based control of a pendulum on a cart system, published in proceedings of the XV LATIN AMERICAN CONTROL CONFERENCE (CLCA ’2012) , in collaboration with Dr. Jesús Sandoval and Dr. Eusebio Bugarín.

 

Poster presentations:

P1. On Existence of Equilibria of Multi-Port Linear AC Networks With Constant-Power Loads, presented in FUTURE ELECTRIC POWER SYSTEMS AND ENERGY TRANSITION, held in Champéry, Switzerland (Feb. 2017).