Multi-Week Continuous-Time Scheduling of Integrated Electricity and Natural Gas System Against Long-Lasting Stressful Weather

Abstract

Increasing climate events have aroused worldwide attention on carbon neutrality, which significantly promotes the development of renewables, yet unfortunately, the high share of renewables dramatically increases the difficulty for power systems in dealing with stressful weather. This paper proposes a novel multi-week continuous-time scheduling of integrated electricity and natural gas system against long-lasting stressful weather. The proposed method considers both multi-week energy sufficiency and continuous-time power balance to accommodate long-lasting stressful weather, in which linepack gas storage, accurately modeled in a continuous spatial-temporal manner, is coordinated with battery energy storage and common thermal units. Temporal decomposition for continuous-time optimization is developed to tractably solve the established problem, where solution space transformation is first used for reformulation and progressive hedging is then utilized to divide the scheduling horizon into multiple segments for efficient calculation. Case studies validate the effectiveness of the proposed method in dealing with long-lasting extreme weather.

Keywords: Long-lasting stressful weather, integrated electricity and natural gas system, multi-week continuous-time scheduling, temporal decomposition