improving hydropower reservoir operation by using snow-related information
TRANSCRIPT
Improving hydropower reservoir operation by using snow-related information
Improving hydropower reservoir operation by using snow-relatedinformation
Desreumaux Quentin
Sherbrooke University - Rio Tinto Alcan
10th December - Como
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
1 Kemano systemSystemHydrology
2 ModelingObjectives and constraintsModeling choicesSnow Data
3 Operating PolicyBasic PolicyPareto FrontsHypervolumeReservoir Trajectory
4 Conclusion
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Kemano system
Section 1
Kemano system
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Kemano system
System
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Kemano system
System
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Kemano system
System
• Installed power capacity of 865 MW
• Watershed of 14000 km2
• Turbined water goes to ocean
• Spilled water inland to Cheslatta Lake
• Cheslatta Lake outflow is uncontrolled
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Kemano system
System
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Kemano system
Hydrology
High inter-seasonal variability due to snow-melt
Figure: Inflows (median, 0.05 and 0.95 quantiles)
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Kemano system
Hydrology
Figure: Snow at 1300m high in Kitimat
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Kemano system
Hydrology
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Modeling
Section 2
Modeling
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Modeling
Objectives and constraints
Mid-term optimization (1 year)
Objectives :
• Maximize revenue from electricity exportation
• Minimize flood impact at Vanderhoof
• Minimum power must be supply to the aluminium smelters
Constraints :
• Minimum and maximum volume
• Maximum flow rate due to physical limits both for powerhouse and spillway
• Minimum spilled rate with respect to environmental constraints
• Keep constant outflow when rivers are frozen
• Cool down the river downstream
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Modeling
Objectives and constraints
Mid-term optimization (1 year)
Objectives :
• Maximize revenue from electricity exportation
• Minimize flood impact at Vanderhoof
• Minimum power must be supply to the aluminium smelters
Constraints :
• Minimum and maximum volume
• Maximum flow rate due to physical limits both for powerhouse and spillway
• Minimum spilled rate with respect to environmental constraints
• Keep constant outflow when rivers are frozen
• Cool down the river downstream
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Modeling
Modeling choices
Time step : 3 days
• Respect flow delay (reservoir → lake & lake → Vanderhoof)
• Shorter than flood period
Aggregated command with priority rule (MEF, electric production, spill)
Optimization algorithms :
• Stochastic dynamic programming
• (Direct Policy Search)
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Modeling
Modeling choices
Time step : 3 days
• Respect flow delay (reservoir → lake & lake → Vanderhoof)
• Shorter than flood period
Aggregated command with priority rule (MEF, electric production, spill)
Optimization algorithms :
• Stochastic dynamic programming
• (Direct Policy Search)
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Modeling
Modeling choices
Time step : 3 days
• Respect flow delay (reservoir → lake & lake → Vanderhoof)
• Shorter than flood period
Aggregated command with priority rule (MEF, electric production, spill)
Optimization algorithms :
• Stochastic dynamic programming
• (Direct Policy Search)
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Modeling
Modeling choices
Time step : 3 days
• Respect flow delay (reservoir → lake & lake → Vanderhoof)
• Shorter than flood period
Aggregated command with priority rule (MEF, electric production, spill)
Optimization algorithms :
• Stochastic dynamic programming
• (Direct Policy Search)
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Modeling
Snow Data
• Real-time measure (hourly)
• Snow water equivalent ≈ quantity of water
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Section 3
Operating Policy
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine itUse it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflowWaste it right now !
Supply to the smelter : ⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export :
⇒ if I get water, I turbine itUse it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflowWaste it right now !
Supply to the smelter : ⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine it
Use it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflowWaste it right now !
Supply to the smelter : ⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine it
Use it right now !
Minimize flood impact :
⇒ empty the reservoir with a limited outflowWaste it right now !
Supply to the smelter : ⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine it
Use it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflow
Waste it right now !
Supply to the smelter : ⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine it
Use it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflow
Waste it right now !
Supply to the smelter :
⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine it
Use it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflow
Waste it right now !
Supply to the smelter : ⇒ use the minimum required
Keep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine itUse it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflow
Waste it right now !
Supply to the smelter : ⇒ use the minimum required
Keep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine itUse it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflowWaste it right now !
Supply to the smelter : ⇒ use the minimum required
Keep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine itUse it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflowWaste it right now !
Supply to the smelter : ⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine itUse it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflowWaste it right now !
Supply to the smelter : ⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine itUse it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflowWaste it right now !
Supply to the smelter : ⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?
Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Basic Policy
Simple mono-objective policies
Maximize revenue from electricty export : ⇒ if I get water, I turbine itUse it right now !
Minimize flood impact : ⇒ empty the reservoir with a limited outflowWaste it right now !
Supply to the smelter : ⇒ use the minimum requiredKeep as much as possible for later on !
⇒ Conflicting objectives !
Smart policy ?Spill only to avoid later flood. Turbine to the maximum excepted if you will not beable to supply the minimum power in the future.
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Pareto Fronts
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Pareto Fronts
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Pareto Fronts
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Pareto Fronts
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Hypervolume
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Hypervolume
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Hypervolume
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Hypervolume
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Reservoir Trajectory
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Operating Policy
Reservoir Trajectory
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Conclusion
Section 4
Conclusion
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Conclusion
• This tool is used at Rio Tinto Alcan
• Real life problem : conflicting objectives
• Anticipate the future is the key for an effective management
• For this system, snow information is necessary to get a good operating policy
• Ongoing works : truly multi-objective method
• Future works : include climatic information such as El Nino
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Conclusion
• This tool is used at Rio Tinto Alcan
• Real life problem : conflicting objectives
• Anticipate the future is the key for an effective management
• For this system, snow information is necessary to get a good operating policy
• Ongoing works : truly multi-objective method
• Future works : include climatic information such as El Nino
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Conclusion
• This tool is used at Rio Tinto Alcan
• Real life problem : conflicting objectives
• Anticipate the future is the key for an effective management
• For this system, snow information is necessary to get a good operating policy
• Ongoing works : truly multi-objective method
• Future works : include climatic information such as El Nino
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Conclusion
Figure:Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin
Improving hydropower reservoir operation by using snow-related information
Conclusion
Questions ?
Improving hydropower reservoir operation by using snow-related information Desreumaux Quentin