Naranjo-Zolotov, Mijail JuanovichHimmelsbach, Jannik2025-11-122025-11-122025-10-29http://hdl.handle.net/10362/190586Dissertation presented as the partial requirement for obtaining a Master's degree in Data Science and Advanced Analytics, specialization in Data ScienceBlockchain interoperability is critical for decentralized peer-to-peer energy trading in interconnected microgrids, yet the performance trade-offs of single-chain versus multi-chain architectures remain poorly understood. This study evaluates the feasibility and efficiency of Cosmos-based blockchain setups for energy transactions, comparing on-chain execution with cross-chain transfers using the Hermes relayer. Through experimental simulations with synthetic energy data, cross-chain transactions demonstrated a 24% increase in gas costs compared to on-chain operations. However, absolute costs remained low, suggesting practical viability despite overheads. These findings highlight a trade-off: multi-chain architectures enable decentralized flexibility across microgrids at modest operational costs, though scalability and security require further optimization. The study provides a foundational framework for evaluating blockchain interoperability in energy systems, underscoring the need for future work integrating real-world datasets and heterogeneous blockchain ecosystems to advance resilient, decentralized energy markets.engBlockchain InteroperabilityPeer-to-Peer Energy TradingMicrogridDecentralized Energy ResourcesCosmosInter-Blockchain Communication Protocol (IBC)SDG 7 - Affordable and clean energySDG 9 - Industry, innovation and infrastructureSDG 11 - Sustainable cities and communitiesSDG 12 - Responsible production and consumptionSDG 13 - Climate actionmaster thesis204074975