Effects of Variable Power on a Country-scale Electricity System: High Penetration of Hydro Power Plants and Wind Farms in Electricity Generation
The present article analyses the effects caused by variable power. The analysis concerns a country-scale
electricity system with a relatively high penetration of seasonally variable hydro power plants and wind
farms in the total electricity generation in 2030. For this purpose, the Latvian electricity system was
chosen as an appropriate case study, as around half of its electricity is already generated from hydro
power and numerous wind farm installations are planned for 2030. Results indicate that in such systems
high renewable power variations occur between seasons causing a high probability of power deficit in
the winter and power surplus in the spring. Based on the results, the wind farms’ influence on the power
deficit and surplus occurrences are discussed in detail. Wind farm generation decreases the probability of
the electricity system being in power deficit, but increases the probability of the system being in power
surplus. In the latter situation, the maximumvalue of power surplus increases since it is enhanced by the
wind farm generation. Probability equations to express these changes are provided.
PURVINS Arturs;
PAPAIOANNOU Ioulia;
OLEINIKOVA Irina;
TZIMAS Evangelos;
2012-06-27
PERGAMON-ELSEVIER SCIENCE LTD
JRC68129
0360-5442,
www.elsevier.com/locate/energy,
https://publications.jrc.ec.europa.eu/repository/handle/JRC68129,
10.1016/j.energy.2012.04.038,
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