Multi-stage bi-level linear model for low carbon expansion planning of multi-area power systems

Abstract

This study proposes a multi-stage expansion model for coordinated transmission and generation of expansion planning of a multi-area power system (MAPS) wherein each region seeks to benefit from the changes. The proposed model adopts a bi-level optimisation approach. In the first level, the expansion cost and carbon emissions are calculated for each region separately for expansion planning. In the second level of optimisation, the calculated cost and emission values are used as the upper limits for the cost of expansion and emissions of the regions in multi-area expansion planning. The proposed bilevel approach prevents one region from bearing additional expansion costs without compensatory benefits and provides advantageous collaboration for the participant regions in the MAPS expansion. The proposed linear model requires fewer computational expansion models for long-term planning of the MAPS, but takes the uncertain generation of renewable units into account.