Modeling of transmission capacity in reserve market considering the penetration of renewable resources

This study presents a planning model for utilizing emergency transmission capacity in the power system reserve market with renewable energy sources. To this end, first, the effects of the operation of a transmission line at higher power than rated power are described. The lifetime reduction of transmission lines caused by operation under these conditions is then measured, and finally, the price is determined based on the rate of lifetime reduction. This surplus capacity is then entered into a two-stage model of the energy and reserve market as a function of price offer, while also taking renewable energy sources into account. The numerical results of a 6-bus network indicates that the introduction of renewable energy sources reduced energy costs while increasing reserve market costs due to uncertainty. Despite the emergency capacity, such costs are reduced due to the network’s utilization of low-cost resources. •Developing the transmission capacity planning in the reserve market.•Proposing the emergency capacity planning for the transmission sector.•Modeling the price function of emergency capacity in a reserve market.•Handling the renewable energy uncertainties in the multi-stage planning problem.