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This paper reports results and an evaluation methodology from two new decision-aid tools that were demonstrated at a Transmission System Operator (REN, Portugal) during several months in the framework of the E.U. project Anemos.plus. The first tool is a probabilistic method intended to support the definition of the operating reserve requirements. The second is a fuzzy power flow tool that identifies possible congestion situations and voltage violations in the transmission network. Both tools use as input probabilistic wind power predictions.

The operation of transmission networks is made depending on their loadsdistribution system. Transmission systems are optimized to ensure loads and generation from EHV, HV and MV. The connection of DG units to distribution networks can impact the planning and operation of transmission systems. When these units are predominantly from renewable sources, given their intermittency or derived from disturbances, they may temporarily disappear causing potential problems on the balance between loads and generation. This paper addresses the challenges that DG units may cause on distribution and transmission networks and, hence, the need for information exchange between DSO and TSO. An example of a real implementation is detailed and the quantity and type of information valuable for both system operators is explained.

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