Publication: Efectos de una alta penetración de energías renovables en el sistema eléctrico
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2014-03-01
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Abstract
The increased share of renewable energies has changed both power system functioning
and conventional plants operation. With regard to the latter, power plants using fuel
have change their operation mode to accommodate to the variability and partial predictability
of renewable energy sources. This fact increases the operation costs of the
conventional plants. Besides, market prices behaviour will experience changes, such as
the decrease of average prices and the increase of their variability. The positive e ects
of an increased renewable installed capacity are also assessed. Furthermore, in countries
with abundant solar resource, studying the e ects of a higher share of renewable energy
sources on the generation mix is necessary, including a high portion of photovoltaic and
solar thermal energy in the generation portfolio. Therefore, a model of the concentrated
solar power generators has been developed in this work. The results of the thermoelectric
model supplies the annual production of this technology, which has been integrated in
the generation schedule model. To analyse the impact of the future con guration of the
generation mix on the power system, a model of unit commitment has been employed.
It includes the characteristics and installed capacity of the generators using fuel and the
estimation of the future production series of renewable energies. The results discussion
contains an analysis of some relevant characteristics of the future power system behaviour,
such as, daily market prices, yearly production by technology, capacity factors of the different
technologies, wind spilled energy, ratio of demand coverage coming from renewable
sources, hourly variation of the energy supplied by hydro, coal, and natural gas power
plants, greenhouse emissions and operation costs.
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Sistema eléctrico