(DTU): Smart-Energy Operating-System
Transcript of (DTU): Smart-Energy Operating-System
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Smart-Energy Operating-System
A system for implementing cross-area flexibility
Henrik Madsen, DTU Compute
http://www.henrikmadsen.org
http://www.smart-cities-centre.org
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The Center for IT-Intelligent Energy Systems in Cities (CITIES) is aiming at establishing methodologies and solutions for design and operation of integrated electrical, thermal, fuel pathways at all scales.
Flexible Solutions and CITIES
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Models for integration and flexibility
Intelligent systems integration using data and ICT solutions are used to establish models and methods for real-time operation of flexible energy systems
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Smart-Energy OS
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Direct and Indirect ControlFor DC info about individual states and
constraints are needed
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Control and OptimizationDay Ahead:
Stoch. Programming based on eg. Scenarios
Cost: Related to the market (one or two levels)
Direct Control:Actuator: Power
Two-way communication
Models for DERs are needed
Constraints for the DERs (calls for state est.)
Contracts are complicated
Indirect Control:Actuator: Price
Cost: E-MPC at low (DER) level, One-way communication
Models for DERs are not needed
Simple 'contracts'
In New Wiley Book: Control of Electric Loads in Future Electric Energy Systems, 2015
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Direct vs Indirect Control
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Model Predictive Control
Simple example:
MPC for following a power reference with ARMAX model derived from a greybox model
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Case study (Level III)
Price-based Control of Power Consumption
(Thermal flexible buildings)
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Data from BPA
Olympic Pensinsula project
27 houses during one year
Flexible appliances: HVAC,cloth dryers and water boilers
5-min prices, 15-min consumption
Objective: limit max consumption
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Flexibility is activated by adjusting the temperature reference (setpoint)
Price responsivity
• Standardized price is the % of change from a price reference,computed as a mean of past prices with exponentially decaying weights.
• Occupancy mode contains a price sensitivity with its related comfortboundaries. 3 different modes of the household are identified (work, home, night).
Hour of day
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Aggregation (over 20 houses)
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Response on Price Step Change
5 hours
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Control of Power Consumption
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Control performance
Considerable reduction in peak consumption
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Case study (Level IV)
Control of Heat Pumps (based on varying prices from Level III)
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E-MPC for heat pump with solar collector (savings 35 pct)
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Case study
(Direct Control and Bids for Markets)
Virtual Storage Related to Super Market Cooling using Thermal Demand Response
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Energy Systems Integration
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The physical system
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The physical system
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The grey-box model
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Demand Response Controllers
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Flexibility Represented by
Saturation Curves(for market integration using block bids)
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Energy FlexibilitySome Demo Projects in CITIES
Control of WWTP (Krüger, ED, ..)
Heat pumps (Grundfos, ENFOR, ..)
Supermarket cooling (Danfoss, TI, ..)
Summerhouses (DC, SE, Energinet.dk, ..)
Green Houses (NeoGrid, Danfoss, Fj.Fyn, ....)
CHP (Dong Energy, FjernvarmeFyn, HOFOR, NEAS, ...)
Industrial production (DI, ...)
VE (charging) (Eurisco, ED, ...)
.............
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CITIES software used
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Summary
A Smart-Energy OS for implementing flexibility has been described
Modelling: Toolbox – CTSM-R - for combined physical and statistical modelling (grey-box modelling)
Control: Toolbox – MPC-R - for Model Predictive Control
Toolboxes found on the homepage of our CITIES project
Two models for characterizing the flexibility have been suggested and demonstrated:
Dynamic models (used for E-MPC based on prices / indirect control)
Saturation curves (used for market bidding / direct control)
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For more information ...See for instance
www.henrikmadsen.org
www.smart-cities-centre.org
...or contact – Henrik Madsen (DTU Compute)
Acknowledgement to all my Master, PhD and PD Students + CITIES (DSF 1305-00027B)