German grid operator 50Hertz has embarked on a transformative trial involving a cutting-edge transformer operation strategy. This innovative method aims to enhance renewable energy integration, minimize redispatch expenses, and optimize network efficiency.

The pilot, initiated at the Pasewalk substation, exploits the thermal inertia of transformers, allowing them to operate at 75 percent capacity instead of the standard 70 percent. This alteration boosts the flow of renewable energy from distribution grids to transmission networks, curbing curtailment and significantly reducing redispatch costs.

Early results indicate promising outcomes, with substantial increases in electricity transmission from distribution grids to high-voltage networks in the first half of 2023. Around 2 GWh of renewable energy curtailment has been prevented, translating to savings of approximately €176,000 in redispatch costs. Given the growing renewable energy sector and anticipated wind power surges, the innovation is expected to yield even more impressive cost savings in the future.

Dr. Dirk Biermann, Managing Director of Markets and System Operations at 50Hertz, emphasized the importance of innovative strategies in achieving efficient renewable energy integration and system reliability. The success of the curative transformer operation method at the Pasewalk substation has paved the way for its expansion to other substations, especially those heavily connected to renewable energy sources.

Source: 50hertz.com