The formulation of a cohesive, yet solvable optimization program for transmission expansion planning of extended systems is engaging many researchers. Related approaches and achievements are often presented by means of a transmission network model with a single snapshot of generation and demand. Moreover the use of proprietary network data leads to difficulties when benchmarking the different existing approaches and thus identifying possible departures to advance. Derived from the IEEE 118 bus network this paper provides a modified network model in accordance with European standards. Four distinct scenarios are developed defining different mixes of conventional and renewable generation facilities as well as the load. Based on intermitted generation and load time series an appropriate economic dispatch in hourly resolution for a whole year for the conventional generators is calculated. Fulfilled by a set of network expansion options the benchmark case including all data is made publicly available.Index Terms--Power system planning, Power system economics, RES integration, hybrid AC/DC Systems I.

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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