Optimal transmission switching and busbar splitting in hybrid AC/DC grids
In: Sustainable Energy Grids & Networks. Elsevier: Amsterdam. ISSN 2352-4677; e-ISSN 2352-4677, more
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| Author keywords |
Busbar splitting;Hybrid AC/DC grids;Mixed-integer nonlinear programming;Mixed-integer programming;Optimal transmission switching;Remedial actions;optimal power-flow;network topology optimization;convex relaxation;security;approximation;heuristics;programs |
| Authors | | Top |
- Bastianel, G.
- Vanin, M.
- Van Hertem, D., more
- Ergun, H., more
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| Abstract |
Driven by global climate goals, an increasing amount of Renewable Energy Sources (RES) is currently being in stalled worldwide. Especially in the context of offshore wind integration, hybrid AC/DC grids are considered to be the most effective technology to transmit the RES power over long distances. As hybrid AC/DC systems develop, they are expected to become increasingly complex and meshed, similar to the present AC system. Nevertheless, there is still limited literature on how to optimize hybrid AC/DC topologies while minimizing the total power generation costs in the system. For this reason, this paper proposes a methodology to optimize the steady-state switching states of transmission lines and busbar configurations in hybrid AC/DC grids. The proposed grid topol ogy optimization model includes optimal transmission switching (OTS) and busbar splitting (BuS), which can be applied to both AC and DC parts of hybrid AC/DC grids. To solve the problem, a scalable and exact nonlinear, non-convex model using a big M approach is formulated. In addition, convex relaxations and linear approximations of the model are tested, and their accuracy, feasibility, and optimality are analyzed. The numerical experiments demonstrate that we can compute an optimized grid topology within an acceptable computation time, and that the investigated relaxations and linearizations provide AC-feasible results. |
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