Energy Management of Co-Phase Traction Power Supply System Considering PV and Hybrid Energy Access Based on Information Gap Decision Theory

In the promising trend of low-carbon emission, new energy sources are being used for high-speed railways to decrease operating costs. Photovoltaic energy (PV) is a new energy source that can be easily obtained but high uncertainty involved. This paper proposes an Information Gap Decision Theory(IGDT)-based energy management approach for the co-phase traction power system considering the integration of PV and hybrid energy storage system(HESS). This approach aims to reduce total costs with the IGDT model, which resolves the uncertainty of PV. The proposed approach offers Day-Ahead robustness and opportunity strategies to guarantee the expected cost and pursue the windfall profit, respectively. The relevant national standards are met as well. The result of case studies verifies the approach can provide effective risk-averse/risk-seeking decisions under PV uncertainty conditions.