Investment & generation costs vs CO2 emissions in the distribution system expansion planning: A multi-objective stochastic programming approach

•A multi-objective approach for distribution expansion planning is proposed.•Two conflicting objectives are considered: Costs vs CO2 Emissions.•Scenario reduction is applied within a two-stage stochastic formulation.•Power injections of DG units are represented through their capability curves.•The linearized model allows achievement of the global optimal solution.