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An Integrated Approach for Analysis of Higher Penetration of Variable Renewable Energy: Coupling of the Long-Term Energy Planning Tools and Power Transmission Network Models

Original scientific paper

Journal of Sustainable Development of Energy, Water and Environment Systems
Volume 7, Issue 4, December 2019, pp 615-630
DOI: https://doi.org/10.13044/j.sdewes.d7.0264
Verica Taseska-Gjorgievska1 , Miko Todorovski2, Natasa Markovska1, Aleksandar Dedinec1
1 Research Center for Energy and Sustainable Development, Macedonian Academy of Sciences and Arts (RCESD-MASA), bul. Krste Misirkov 2, 1000 Skopje, Macedonia
2 Faculty of Electrical Engineering and Information Technologies, University of Ss Cyril and Methodius, Rugjer Boshkovik 18, 1000 Skopje, Macedonia


Many studies and scientific papers have been published that consider the integration of renewable sources in energy systems, using the least-cost optimization models as a long-term generation expansion planning tool. Supplementary to these analyses, this paper focuses on the transmission network capacity for acceptance of variable renewable energy. The hypothesis is that the simplified electric power transmissions system in the long-term planning modelling tools does not reflect properly the capacity for integration of the variable renewable energy. An integrated approach is applied with aim to incorporate the grid expansion needs and costs (using direct current load flow analysis), necessary for increased renewable electricity penetration. The already developed MARKAL-Macedonia model will be used as a case study. After several iterations and feedback loops between the MARKAL-Macedonia and the network model, the expected outcome is to achieve a new cost-effective solution for deployment of variable energy on a larger scale.

Keywords: Renewable energy sources, Long-term energy planning, Least-cost optimization tool, MARKAL, Direct current model, Power flow analysis.

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