Control strategies of phase-shifting transformers in long-term network development

Conference: International ETG Congress 2015 - Die Energiewende - Blueprints for the new energy age
11/17/2015 - 11/18/2015 at Bonn, Germany

Proceedings: International ETG Congress 2015

Pages: 7Language: englishTyp: PDF

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Authors:
Bauer, Roland; Weidner, Johannes (50Hertz Transmission GmbH, Berlin, Germany)
Salehinajafabadi, Saeed (Cottbus, Germany)

Abstract:
To ensure higher operational security and more competition in electricity market, European Transmission System Operators (TSOs) are to increase their interconnections, resulting to a highly meshed grid. On the other hand the evolution of generation mix toward Renewable Energy Sources (RES) has added to the complexity of both grid planning and operation as well. Due to uncertainty, intermittency and supply-demand distance independency of RES, system operators are facing the new challenges of unscheduled and loop flows. Since these flows can cause congestions on their path through different control areas, different measures such as redispatch, renewable curtailment and application of Phase Shifting Transformers (PST) are considered to cope with the problem. This paper will introduce and compare several strategies of possible PST control schemes in the context of network planning, evaluating their effect on active power exchanges of 50Hertz control area with neighboring TSOs (especially Czech and Polish TSOs known as CEPS and PSE respectively) looking to the year 2024.