EVS28 KINTEX, Korea, May 3-6, 2015 Impact of electric vehicles in sizing the power transformer in micro-grid system X-L. Dang 1 , P. Codani 1,2 , M. Petit 1 1 Department of Power and Energy Systems, Supelec, France 2 Advanced Technologies and Innovation Research Department, PSA Peugeot Citroen, France
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Impact of electric vehicles in sizing the power ... · Impact of electric vehicles in sizing the power transformer in micro-grid system ... I. Introduction II. Optimal Transformer
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EVS28 KINTEX, Korea, May 3-6, 2015
Impact of electric vehicles in sizing the
power transformer in micro-grid system
X-L. Dang1, P. Codani1,2, M. Petit1
1Department of Power and Energy Systems, Supelec, France 2Advanced Technologies and Innovation Research Department, PSA
Peugeot Citroen, France
Outline
I. Introduction
II. Optimal Transformer Sizing
III. Introduction of PV and EVs
IV. Energy Management System
V. Results
VI. Conclusion
2
Outline
I. Introduction
2
Introduction (1)
• Objectives in CO2 emission reduction
• Increasing share of Renewable Energy Sources (RES)
• Increasing interest in Plug-in Electric Vehicles (PEV)
• Renewable Energy Sources:
• Intermittent
• Asynchronous
• Located at the DSO side
• PEV:
• Peak power related problems
• Located at the DSO side
• Problem:
• Concerns about grid security
• Flexibility of different types of EVs in the distribution network?
3
Introduction (2)
• Research topic:
• Evaluating the impacts of introducing PV panels and EVs in an eco-dis
trict on the substation transformer
• Defining an energy management strategy for flexible loads
• Using EVs as flexibility sources
4
Distribution
Grid
Transformer
Psub
EV fleet AResidential households
Commercial Buildings
PV panels
EV fleet B
EV fleet C
Eco-district
Prod
Cons
Cons + Stor
Figure: System overview
Introduction (3)
• Approach:
1. Optimal transformer sizing, without no PV nor EVs, with temporary
overloadings allowed
2. Introduction of PV and EVs analysis of overloading conditions
3. Definition of an energy management strategy for EVs charging, with
V2G capabilities analysis of new overloading conditions
5
Distribution
Grid
Transformer
Psub
EV fleet AResidential households
Commercial Buildings
PV panels
EV fleet B
EV fleet C
Eco-district
Prod
Cons
Cons + Stor
Figure: System overview
Outline
II. Optimal Transformer Sizing (no PV nor EV)
1. Residential & commercial load curves
2. Transformer Operating conditions
2
Residential consumption
• Residential consumption modeling1
• This model takes into account the specific nature of particular consumers
• It also includes a model of the use of household lightings2
• District composed of 200 households
• With a mean of 4 people per household
6
1I. Richardson, M. Thomson, D. Infield, and C. Clifford, Domestic electricity use: A high-resolution energy demand model, Energy and Buildings, vol. 42, no. 10, pp.18781887, Oct. 2010 2Ian Richardson, Murray Thomson, David Infield, and Alice Delahunty, "Domestic lighting: A high-resolution energy demand model ," Energy and Buildings , vol. 41, no. 7, pp. 781-789, 2009.
Figure: residential power consumption over one day
12AM 3AM 6AM 9AM 12PM 3PM 6PM 9PM 12AM0
75
150
225
P (
kW
)
Presi
Commercial consumption
• Modeling of the commercial building consumption:
• Heating / Air cooling, ventilation, IT hardware, lightings and misc
• Summing up all the consumptions
• Data processing (15 minute time stamp)
• On site data from a commercial building
• 1000 people working in the district
7
12AM 3AM 6AM 9AM 12PM 3PM 6PM 9PM 12AM0
25
50
75
100
P (
kW
)
Pterti
Figure: commercial consumption load curve over one day
Transformer operating conditions
• Optimal Transformer Sizing, temporary overloading periods
allowed, no PV nor EV:
8
Figure: transformer operating conditions during overloading periods