  This paper presents a static generation expansion planning formulation in
which operational and investment decisions for a wide range of technologies are
co-optimized from a centralized perspective. The location, type and quantity of
new generation and storage capacities are provided such that system demand and
flexibility requirements are satisfied. Depending on investments in new
intermittent renewables (wind, PV), the flexibility requirements are adapted in
order to fully capture RES integration costs and ensure normal system operating
conditions. To position candidate units, we incorporate DC constraints, nodal
demand and production of existing generators as well as imports and exports
from other interconnected zones. To show the capabilities of the formulation,
high-temporal resolution simulations are conducted on a 162-bus system
consisting of the full Swiss transmission grid and aggregated neighboring
countries.
