Prefeasibility study on flow-based capacity calculation methodologies

The TSOs of the Baltic States (Elering AS, AS „Augstsprieguma tīkls”, and Litgrid AB) initiated a joint prefeasibility study in order to investigate the possibility or impossibility of flow-based (FB) capacity calculation methodology implementation for day-ahead and intraday market operations within the Baltic CCR. The study shall provide a basis for reasoned proposal for a common coordinated capacity calculation methodology to the regulators of Baltic CCR.

E-Bridge provided weekly progress reports, study reports, study power flow cases and results and presentations for meetings and workshops. The project was divided into two phases: The analysis on technical feasibility and the simulation of Flow-based (FB) capacity calculation and allocation and comparison with the CNTC approach.

In a first step, E-Bridge concluded that the FB methodology is technically feasible to be applied in the Baltic States by evaluating the Baltic current capacity calculation methodology and how the FB methodology could be applied in the Baltic States. The conclusion provided sufficient comfort to move the project into the next step. In Step 2, E-Bridge actively managed and facilitated the whole FB capacity calculation process. Starting from creating PSSE/Python scripts for FB capacity calculation and MATLAB scripts for post-processing, actually running the FB capacity calculations for four months, facilitating the TSOs to simulate the FB market coupling simulations, to interpreting the simulation outcome by comparing the market efficiency and the power system impact between FB and NTC methodologies. Based on the overall assessment and recommendations from E-Bridge, the Baltic TSOs are able to reason the final CCM proposal with the regulators for approval. As an additional study request from the Baltic TSOs, E-Bridge provided insights on how the third countries (e.g. Russia, Belarus) impact the Baltic grids (under FB) with different market scenarios.

The clients were highly satisfied with the performance of the consulting team:

“E-Bridge was a brilliant coach in our journey on the application of the flow based transmission capacity calculation approach in the feasibility study carried out by the Baltic TSOs. They introduced us to the flow based capacity calculation concept and helped to navigate through the analysis work. E-Bridge professionals were capable to apply their knowledge and competence on the flow based subject matters, and project managerial skills, guiding us to commonly-acceptable results of our study. We would recommend to approach E-Bridge in a first instance to anyone who wants to explore the flow based capacity calculation approach, and wants to get professional project management services.”

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