Publications by Christophe Nicolet

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Numerical simulation and stability analysis of an islanded power network comprising 40 MW of hydropower, 20 MW of wind power and 60 MW of gas-fired power plant are investigated. First, the modeling of each power plant is fully described. The wind farm is m ...

Hydropower represented in 1999 19% of the world electricity production and the absolute production is expected to grow considerably during the next 30 years. Francis turbines play a major role in the hydroelectric production due to their extended range of ...

In view of a global trend towards an increasing share of renewable energy sources, improved flexibility of operation is needed in pumped storage power plants (PSPPs) to support this transition. The repeated changes in PSPP operation to balance the grid have a significant impact on the unit’s lifespan and could be mitigated thanks to variable speed unit. This study proposes a method to quantify the impact on the impeller lifespan of various start-up procedures that take advantage of the variable speed to dec

In real systems, the phenomena, such as pipe-wall viscoelasticity, unsteady friction or fluid structure interaction induce additional damping and dispersion of transient pressure waves than that defined by classical waterhammer. In this paper, unsteady fri ...

Christophe Nicolet

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Influence of the Hydraulic System Layout on the Stability of a Mixed Islanded Power Network

Hydroacoustic modelling and numerical simulation of unsteady operation of hydroelectric systems

Experimental Investigation of the Fatigue-Induced Damage in Hydroelectric Units During Start-Up

Modeling of Unsteady Friction and Viscoelastic Damping in Piping Systems