Concept

Unit commitment problem in electrical power production

Publications associées (97)

Constrained hierarchical networked optimization for energy markets

In this paper, we propose a distributed control strategy for the design of an energy market. The method relies on a hierarchical structure of aggregators for the coordination of prosumers (agents which can produce and consume energy). The hierarchy reflect ...

IEEE2018

Dynamics and Optimal Control of Self-Sustained Instabilities in Laminar and Turbulent Swirling Flows: Application to the Part Load Vortex Rope in Francis Turbines

Simon Pasche

In 2050, the European commission plans to achieve actual energetic transition, which contributes in meeting the climate change challenges by moving away from the fossil fuels and by developing a competitive low-carbon economy. As a consequence, a foreseeab ...

EPFL2018

Experimental Validation of an Explicit Power-Flow Primary Control in Microgrids

Jean-Yves Le Boudec, Mario Paolone, Lorenzo Enrique Reyes Chamorro, Enrica Scolari, Andrey Bernstein, Andreas Martin Kettner, Niek Johannes Bouman, Benoit Jacques Louis Marie Cathiard

The existing approaches to control electrical grids combine frequency and voltage controls at different time-scales. When applied in microgrids with stochastic distributed-generation, grid quality of service problems may occur, such as under- or overvoltag ...

2018

High Power Electronics Innovation Perspectives for Pumped Storage Power Plants

Drazen Dujic, Pedro Camilo de Oliveira e Silva, Miodrag Basic

The current framework of high penetration of intermittent energy sources requires variable-speed pumped hydro storage power plants (PHSPs) to provide grid support functions, which are, in this case, achieved through two technologies: doubly-fed induction m ...

2018

Unsupervised Disaggregation of PhotoVoltaic Production from Composite Power Flow Measurements of Heterogeneous Prosumers

Mario Paolone, Fabrizio Sossan, Lorenzo Nespoli, Vasco Medici

We consider the problem of estimating the (unobserved) amounts of PV generation and demand in a power distribution network starting from measurements of the aggregated power flow at the point of common coupling (PCC) by leveraging local global horizontal i ...

2018

Voltage Stabilization in MVDC Microgrids Using Passivity-Based Nonlinear Control

Giancarlo Ferrari Trecate, Pulkit Nahata, Andrea Martinelli

This paper investigates the application of passivity-based nonlinear control to the problem of primary voltage stabilization in medium-voltage DC microgrids (MVDC mGs) given by the interconnection of nonlinear distributed generation units (DGUs) and power ...

IEEE2018

Part Load Vortex Rope as a Global Unstable Mode

François Avellan, François Gallaire, Simon Pasche

Renewable energy sources (RES) have reached 23.7% of the worldwide electrical generation production in 2015. The hydraulic energy contribution amounts to 16.6% and comes mainly form large-scale hydropower plants, where Francis turbines represents 60% of th ...

American Society of Mechanical Engineers2017

Real-Time Distributed Algorithms for Nonconvex Optimal Power Flow

Colin Neil Jones, Yuejiang Liu, Georgios Stathopoulos, Jean-Hubert Hours

The optimal power flow (OPF) problem, a fundamental problem in power systems, is generally nonconvex and computationally challenging for networks with an increasing number of smart devices and real-time control requirements. In this paper, we first investi ...

2017

Hydrodynamics of Francis turbine operation at deep part load condition

Keita Yamamoto

The electrical energy production from New and Renewable Energy (NRE) sources have become increasingly important in the past decades. However, intermittent electrical generation from NRE sources due to their stochastic nature often prevents stable power out ...

EPFL2017

Potential contributions of wind power to a stable and highly renewable Swiss power supply

Michael Lehning, Annelen Kahl

Using data from two measurement networks, we analyse the following aspects of wind speeds over Switzerland to assess the possibility of high wind power penetration: spatial correlation, persistent low wind power conditions and the diurnal and seasonal wind ...

Elsevier Sci Ltd2017

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