OPTESO: An innovative Approach for global OPTimality with limited date Exchange between Transmission and Distribution System Operators

The complexity of power system operation has increased over the last few years due to the increasing impact of renewable energy sources and uncertainty in global energy markets. The energy transition is shifting load and generation away from well-known patterns established over several decades. Systems designed to distribute energy from the transmission grid to the consumers are now seeing power flows that change direction depending on the time of the day and the weather, sometimes injecting power generated at the lowest voltage network up into the transmission grid. More remedial actions must be taken to ensure network stability, and increasingly these measures must be coordinated with distribution system operators (DSOs).