Low carbon oriented electric-hydrogen system multi-time scale collaborative optimal scheduling strategy considering hybrid energy storage

Abstract

The power system is transforming towards higher renewable energy sources (RES) penetration and more energy storage quantities, which brings great challenges to the RES accommodation of the power system. As a clean energy source, hydrogen is an effective means to solve the above problem and promote low carbon emission in the power system. This paper proposes a low carbon oriented electric-hydrogen system (EHS) multi-time scale collaborative optimal scheduling strategy considering hybrid energy storage. Compared with the traditional model, mobile energy storage and stationary energy storage are considered comprehensively in the study of EHS in this paper, and the electric network along with the transportation network are integrated in the space-time scale. A day-ahead and intra-day collaborative scheduling method is proposed to optimize the above model, which further improves the accuracy of scheduling by introducing intra-day rolling scheduling on a shorter time scale. Finally, an improved IEEE-33 power system is used to conduct case studies. The results confirm that compared with the traditional scheduling strategy, the proposed strategy can improve the accommodation rate of RES by 5.7 %, reduce the system carbon emission by 3.3 %, and reduce the system operating cost by 7.86 %.