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CPV-connected ES for Multiple Services

Möser, Andreas LU and Siöstedt, Simon (2016) In CODEN:LUTEDX/TEIE EIE920 20162
Industrial Electrical Engineering and Automation
Abstract
In this master thesis, the topic of energy storage connected to concentrator photovoltaic power
production is assessed. The end goal is to propose the optimal energy storage technology and its sizing,
regarding power and energy capacity, for an existing concentrator photovoltaic power plant. The plant is
located in the province of Algarve in Portugal, the installed production capacity is 4.5 MW, and the
average annual electric energy produced is 7 200 MWh. Services chosen to be provided by the energy
storage, in falling priority, are ramping support, peak shaving and arbitrage. The energy storage system
will pose as a demonstration project, contributing with knowledge to the field and promoting investment
in novel energy technology.... (More)
In this master thesis, the topic of energy storage connected to concentrator photovoltaic power
production is assessed. The end goal is to propose the optimal energy storage technology and its sizing,
regarding power and energy capacity, for an existing concentrator photovoltaic power plant. The plant is
located in the province of Algarve in Portugal, the installed production capacity is 4.5 MW, and the
average annual electric energy produced is 7 200 MWh. Services chosen to be provided by the energy
storage, in falling priority, are ramping support, peak shaving and arbitrage. The energy storage system
will pose as a demonstration project, contributing with knowledge to the field and promoting investment
in novel energy technology. Also, as the penetration of intermittent renewable energy sources are
expected to increase over the coming decades, the demand for services provided by energy storage
systems will grow. To reach the objective of technology and sizing selection, a literature study combined
with computer-aided simulations has been carried out. Also, an economic analysis of relevant
technologies has been performed to help selecting the wisest option. For the simulations, measurements
of direct normal irradiation have been used to calculate minute-by-minute power outputs. The validity of
the calculated output was confirmed through comparison with real output data from the solar platform.
It was found that an energy storage based on the sodium-sulphur technology would be the preferred
alternative. The proposed sizing was set at a rated power of 2.75 MW and an energy capacity of 1 MWh.
With these characteristics, more than 98 % of the simulated extreme ramping events (changes in output
over 10 % of installed capacity per minute) would be covered for. A general conclusion from the analysis
is that to provide the service of ramping support, a rather high power rating is needed, while the
required energy capacity is small. This means that out of the three chosen services, ramping support is
the one dimensioning for the rated power. On the contrary, peak shaving and arbitrage are energy
capacity intensive, thus, they are the dimensioning services for the energy parameter. It was also found
that the arbitrage service, with the chosen energy storage dimensions, resulted in very limited gains in
revenue. However, when the service is combined with peak shaving, it can instead be seen as a strategy
to minimize losses in revenue.
Regarding technologies, it was early concluded that a mature option of battery energy storage was going
to be chosen for our case. The sodium-sulphur technology was found to excel, from an economical
standpoint, in cases where the required energy capacity is rather large. The lithium ion technology on
the other hand is preferred when this dimension is kept small. A lead-acid battery was found problematic
to combine with the services of peak shaving and arbitrage because of its limited ability to be fully
discharged. (Less)
Please use this url to cite or link to this publication:
author
Möser, Andreas LU and Siöstedt, Simon
supervisor
organization
alternative title
Choosing technology and dimensions of an ES for a solar power production site in Algarve, Portugal
course
EIE920 20162
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
Battery energy storage system, Concentrator photovoltaic, Solar power production, Grid-connected storage, Energy storage services, Ramping support, Peak shaving, Arbitrage, Technology and size selection
publication/series
CODEN:LUTEDX/TEIE
report number
5381
language
English
id
8891407
date added to LUP
2017-04-19 16:58:22
date last changed
2017-04-19 16:58:22
@misc{8891407,
  abstract     = {In this master thesis, the topic of energy storage connected to concentrator photovoltaic power
production is assessed. The end goal is to propose the optimal energy storage technology and its sizing,
regarding power and energy capacity, for an existing concentrator photovoltaic power plant. The plant is
located in the province of Algarve in Portugal, the installed production capacity is 4.5 MW, and the
average annual electric energy produced is 7 200 MWh. Services chosen to be provided by the energy
storage, in falling priority, are ramping support, peak shaving and arbitrage. The energy storage system
will pose as a demonstration project, contributing with knowledge to the field and promoting investment
in novel energy technology. Also, as the penetration of intermittent renewable energy sources are
expected to increase over the coming decades, the demand for services provided by energy storage
systems will grow. To reach the objective of technology and sizing selection, a literature study combined
with computer-aided simulations has been carried out. Also, an economic analysis of relevant
technologies has been performed to help selecting the wisest option. For the simulations, measurements
of direct normal irradiation have been used to calculate minute-by-minute power outputs. The validity of
the calculated output was confirmed through comparison with real output data from the solar platform.
It was found that an energy storage based on the sodium-sulphur technology would be the preferred
alternative. The proposed sizing was set at a rated power of 2.75 MW and an energy capacity of 1 MWh.
With these characteristics, more than 98 % of the simulated extreme ramping events (changes in output
over 10 % of installed capacity per minute) would be covered for. A general conclusion from the analysis
is that to provide the service of ramping support, a rather high power rating is needed, while the
required energy capacity is small. This means that out of the three chosen services, ramping support is
the one dimensioning for the rated power. On the contrary, peak shaving and arbitrage are energy
capacity intensive, thus, they are the dimensioning services for the energy parameter. It was also found
that the arbitrage service, with the chosen energy storage dimensions, resulted in very limited gains in
revenue. However, when the service is combined with peak shaving, it can instead be seen as a strategy
to minimize losses in revenue.
Regarding technologies, it was early concluded that a mature option of battery energy storage was going
to be chosen for our case. The sodium-sulphur technology was found to excel, from an economical
standpoint, in cases where the required energy capacity is rather large. The lithium ion technology on
the other hand is preferred when this dimension is kept small. A lead-acid battery was found problematic
to combine with the services of peak shaving and arbitrage because of its limited ability to be fully
discharged.},
  author       = {Möser, Andreas and Siöstedt, Simon},
  keyword      = {Battery energy storage system,Concentrator photovoltaic,Solar power production,Grid-connected storage,Energy storage services,Ramping support,Peak shaving,Arbitrage,Technology and size selection},
  language     = {eng},
  note         = {Student Paper},
  series       = {CODEN:LUTEDX/TEIE},
  title        = {CPV-connected ES for Multiple Services},
  year         = {2016},
}