  Large solar power stations usually locate in remote areas and connect to the
main grid via a long transmission line. Energy storage unit is deployed locally
with the solar plant to smooth its output. Capacities of the grid-connection
transmission line and the energy storage unit have a significant impact on the
utilization rate of solar energy, as well as the investment cost. This paper
characterizes the feasible set of capacity parameters under a given solar
spillage rate and a fixed investment budget. A linear programming based
projection algorithm is proposed to obtain such a feasible set, offering
valuable references for system planning and policy making.
