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Albania and North Macedonia: The evolution of the electricity system under the scope of climate change
KTH, Skolan för industriell teknik och management (ITM).
2019 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

Albania and North Macedonia, along with the rest of the Balkan region, have been developing since the early nineties and have achieved an upper-middle income status. Along with this development, the energy demand grew as well. However, the current electricity system in these two countries has not significantly evolved during the past 35 years since the majority of the infrastructure was built during the Soviet era. It is therefore crucial to upgrade the existing system to avoid power shortages and to reduce electricity losses. At the same time, the effects of climate change are becoming more and more obvious and pose a direct threat to the affordability of electricity generated by large hydropower plants during the last decades.

This study examines the evolution of the electricity sector of Albania and North Macedonia for the next 20 years. It will put to the test the current electricity system extrapolated into the future, the changes that might be necessary to be made to tackle the effects of climate change and the nations’ commitments to reduce the impacts of a changing climate. The first step is to understand the energy system in each country, starting with their available resources, historical capacities, electricity demand etc. Both countries are almost identical in terms of sizes with each one having an electricity supply system of around 2 GW in capacity and a final electricity consumption of 5,563 GWh and 6,104 GWh in 2017 for Albania and North Macedonia respectively. On the other hand, the systems differ qualitative. To be more specific, almost 100% of Albania’s generation capacity is hydropower, while the North Macedonian system is based mainly on lignite (coal power) and to a smaller extend on hydropower. Since this study focuses on the effects of climate change on electricity produced from hydropower, a correlation was made to link the reduced precipitation with river flow and in the end hydropower generation. The correlation results show that an average decrease in precipitation of 1.6% and 1.9% can be expected in 2037 compared to current levels, that will lead to a decrease in hydropower generation of 3.3% and 4% for Albania and North Macedonia respectively.

Then the cost-optimization model, using OSeMOSYS, was created to depict those changes. First, the business-as-usual scenario, used as a reference scenario, extends the current situation into the future. In a few words, Albania and North Macedonia will invest in hydropower and wind capacity respectively to cover the increasing electricity demand. Secondly the Climate Change scenario was investigated, where the decrease in precipitation was considered, but according to the model, electricity imports will increase instead of investing in additional capacity. The third scenario was the Increased Renewables scenario, where the countries fulfil their obligations to install more renewable capacity and diversify their electricity mix. This approach will reduce their vulnerability to climate change and electricity imports but will come at a great investment cost for the countries’ economy. Overall, results show that the regional power sector will be affected by climate change. However, the biggest challenge will be to tackle the annual and seasonal variation in hydropower generation rather than the general decreasing trend in precipitation over the years. To be more specific, annual hydropower generation can even double between a dry and a wet year in some cases. However, under the climate change scenario annual hydropower generation will only decrease by 5.7% and 2.7% during a wet and a dry year compared to the business-as-usual scenario respectively.

Ort, förlag, år, upplaga, sidor
2019. , s. 85
Serie
TRITA-ITM-EX ; 2019:420
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:kth:diva-264262OAI: oai:DiVA.org:kth-264262DiVA, id: diva2:1372761
Externt samarbete
MSc Sustainable Energy Engineering
Handledare
Examinatorer
Tillgänglig från: 2019-11-25 Skapad: 2019-11-25 Senast uppdaterad: 2019-11-25Bibliografiskt granskad

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