Power Vision Engineering Leaflet

Power Vision Engineering, PO BOX 73 EPFL, CH-1015 Lausanne http://www.powervision-eng.ch, mailto: info@powervision-eng.chPower Vision Engineering provides expertise to optimize hydropower exploitation21st Century: The Energy ChallengeHydroelectric Development to Face Increasing Energy DemandThe electricity world consumption is expected to double within the next 30 years. Hydropower, which is already a major actor in the electricity market with 19% of the world production, will be considerably developed because it features high power density, production flexibilty , fast time response and has the advantage of not producing greenhouse effect gases. However, this development should be achieved with the highest technical standards to reduce environmental and social impacts. New Exploitation Strategies: Increase of Hydroelectric Power Plant SolicitationModern hydropower has to face new challenges related to completely different exploitation strategies leading to an increase of the solici-tation of the entire machine. Due to the deregulated energy market, hydroelectric power plants are increasingly subjecting to off design operation, start-up and shutdown and new control strategies. Consequently, the operation of hydroelectric power plants leads to transients phenomena, risk of resonance or instabilities. To be competitive on the energy market, the specific power and efficiency of hydro units, which are already high, are constantly increased in order to meet economical issues but lead to higher loading of the structure of the turbines. Consequently, manufacturers, consultants and electric utilities of hydro power plants need integrating new technologies and methodologies for improving dynamic performances, ensuring the safety and increasing the competitiveness of hydroelectric power plants. The Numerical Simulation SolutionDesign, operation and regulation of hydroelectric power plant require the ability to predict the dynamic behavior of the power plant taking into account various aspects of the exploitation of the installation. The numerical simulation of the dynamic behavior of hydroelec-tric power plant provides a safe way to determine system solicitations.Power Vision Engineering provides support and expertise for the modelling, simulation and analysis of the dynamic behavior of hydroe-lectric power plant with state of the art softwares enabling the simulation of an entire power plant for troubleshooting, optimization and transient analysis purposes.Power Vision EngineeringMain activitiesModellingSimulationAnalysis and OptimizationPower Vision Engineering focuses on the modelling, simula-tion and analysis of the dynamic behavior of hydroelectric power plants. Our company has expertise in the fields of Hydraulic, Mechanical, Electrical and Civil engineering and promotes multiphysics approaches to include the dynamics of each part of the installation with rational methodology.The main services provided by Power Vision Engineering are:Numerical simulation of transient phenomena in hydroe-lectric power plants comprising:- hydraulic circuit and hydraulic machines (pump- turbines, Francis, Pelton, Kaplan turbines, pumps)- electrical installation and electrical machines (Synchronous Generator, Varspeed, transformer), rotating inertias,- control system (turbine speed governor, voltage regulator, power system stabilizer (PSS)),- connection to islanded/interconnected power networks.Numerical simulation of periodic phenomena:- part load vortex rope excitation, full load instabilities, rotor-stator interactions,- speed no load stability,- power quality,- etc,Optimization:- control/command strategy,- control/command parameters,- emergency procedures,- annual production,Power Vision Engineering also develops and provides dedi-cated simulation tools for specific hydroelectric power plants with standard simulation scenariosMethodology proposed by Power Vision Engineering to study and optimize the dynamic behavior of hydroelectric power plantsPower Vision EngineeringPower Vision Engineering, PO BOX 73 EPFL, CH-1015 Lausanne http://www.powervision-eng.ch, mailto: info@powervision-eng.chDescriptionProject Loca tion FiguresSwitzerlandSwitzerlandPump-turbine power plantPelton/pump power plantPump Storaged power plantPiping systemFrancis turbine power plantUSAChinaIceland* done for the EPFL-LMHTransient analysis of 4x150 MWvariable speed pump-turbines power plant*Transient analysis of complex 3x25 MW Pelton turbines including pumping capacity power plant*Full load analysis of 4x390 MW pump-turbine power plant, identi?cation of full load instabilities conditions and onset*IAHR Proc. publicationPiping oscillatory analysis of a pumping system, free oscillation analysis, forced oscillation analysis*Transient analysis of complex hydraulic system including 600 MW Francis turbines, 40 km long headracetunnel and a 1.4 km long surge tunnel**Francis turbine power plantStability analysis of a 1GW hydroelectric power plant in islanded production mode, turbine speed governor stability and assessment of the PSS contribution*IEEE Power Systems publicationResearch projectPower Vision EngineeringPower Vision Engineering, PO BOX 73 EPFL, CH-1015 Lausannehttp://www.powervision-eng.ch, mailto: info@powervision-eng.chExperience* *done for the EPFL-LCHPower Vision EngineeringPower Vision Engineering, PO BOX 73 EPFL, CH-1015 Lausannehttp://www.powervision-eng.ch mailto: info@powervision-eng.chContactPower Vision Engineering PartnersPower Vision Engineering1, Chemin des Champs-CourbesCH-1024 EcublensSwitzerlandPhone: +41'79'773'47'76 or +41'79'775'17'61Fax: +41'21'691'45'13Mailto: info@powervision-eng.chWeb: http://www.powervision-eng.chAquaVision Engineering SàrlChemin des Champs-Courbes 1CH-1024 EcublensSwitzerlandhttp://www.aquavision-eng.chLaboratory for Hydraulic MachinesEPFL-FSTI-ISE-LMH33 bis avenue de CourCH-1007 LausanneSwitzerlandhttp://lmhwww.epfl.chLaboratory for Electrical MachinesEPFL-FSTI-ISE-LMEStation 11CH-1015 EcublensSwitzerlandhttp://lme.epfl.chServices assessment and validation of operating safety of hydraulic waterways networks (water hammer and mass oscillations, structural safety and design, turbine transients, pump transients, etc.) under normal and extreme operating conditionsassessment and optimization of operating stability of hydroelectric power plant (draft tube surge, full load intsabilities, rotor-stator interaction, turbine/pump stability, governor parameters, etc.) under normal and extreme operating conditionsassessment and validation of operating safety of electrical installations (earth fault, out of phase synchronization, short-circuit, etc.) under normal and extreme operating conditionsdesign and optimization of variable speed pump-turbine installationsset-up and optimization of control strategy including turbine speed governor, voltage regulator and power system stabilizerlaboratory and field measurements of operating stability indicators for hydraulic networks (turbine pressure fluctuations, turbidity at intakes and head-and tailrace tunnels, Pelton needle erosion rates, etc.)general check-up ("fitness check") of power house and eventual needs for operating improvements and definition of the technico-economical optimum of the power plant