First CASSANDRA Webinar - Concept and theoretical aspects of CASSANDRA by Giorgos Andreou, Lecturer at Power Systems Laboratory Department of Electrical and Computer Engineering Aristotle University of Thessaloniki
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First CASSANDRA Webinar - Concept and theoretical aspects of CASSANDRA by Giorgos Andreou, Lecturer at Power Systems Laboratory Department of Electrical and Computer Engineering Aristotle University of Thessaloniki
2. Power Distribution Network
2Cassandra Project 1st Webinar June 11, 2013
Small Industry
MV/LV Power
Transformer
Commercial
MV/LV Power
Transformer
MV/LV Power
Transformer
Residential
Residential
Commercial
Commercial
Overhead or Underground
Power Lines
HV/MV Power
Substation
Residential
3. Power Distribution Network
• Consumer Side (Demand Side)
• Demand Side Management
– Consumption optimization
– Energy efficiency
– Profit
• Problems
– Which is the profile of each
consumer?
– How to cluster/categorize
consumers?
– Which DSM program/incentive to offer
to each consumer?
3Cassandra Project 1st Webinar June 11, 2013
4. Cassandra as a solution
• A helping hand in order to:
– Simulate the consumption of consumer populations,
– Understand behaviors that drive consumption,
– Cluster consumers into groups for more efficient incentivisation,
– Simulate consumer response to specific Demand Response programs
• Two modeling approaches:
– Input based on demographic data → aggregate results for a consumer
population
– Input based on consumer level measurements → bottom-up approach
with results regarding individual consumers and/or consumer
populations
4Cassandra Project 1st Webinar June 11, 2013
5. Basic modeling concepts
• Reality:
– Installation (Aggregation of all the appliances installed within the
premises of a consumer).
– Person(s) performing activities by the use of appliances according to
their utility.
– Person(s) have habits (recurrent behaviour).
– Person(s) receive incentives to modify consumption, and choose either
to respond or not according to their utility.
5Cassandra Project 1st Webinar June 11, 2013
6. Basic modeling concepts
• Modeling:
– An Installation consists of its Appliances.
– Measurements of the installation are used in order to determine its
Appliances, as well as the consumer Activities (Disaggregation
procedure).
– Appliances are described by Consumption Models (mathematical
representations of their active and reactive power consumption).
– Consumer utility is modelled through Utility Models.
– Incentives are modelled through Incentive Models.
– Response is modelled through Response Models.
– Auxiliary Models:
• Pricing Schemes Models
• CO2 Emission Calculation
6Cassandra Project 1st Webinar June 11, 2013
7. Functionality according to quality of input
• Basic simulation rule: The more information you offer as
input, the more accurate results you will obtain.
• Demographic data input: The simulation will be based on
statistics, thus it will not produce accurate individual consumer
results.
• Measurement data input:
– The Cassandra modeling is based on per minute measurements of
active and reactive power for an installation (loss of information)
– Accuracy of results depends on information compensation.
7Cassandra Project 1st Webinar June 11, 2013
