Abstract
The construction area of the Sichuan-Tibet Railway is located at a high altitude with thin air condition, but it benefits from excellent solar irradiance. To address issues such as insufficient power and low efficiency of traditional fuel-based equipment in such harsh environments, electric equipment is being employed as a replacement for conventional fuel-based equipment. In order to achieve sustainable development for the Sichuan-Tibet Railway, this article proposes that a microgrid can be conducted in the construction area of the Sichuan-Tibet Railway which will provide power to the electric equipment during the construction process and to electric locomotives upon completion. This article compares the characteristics of AC microgrids and DC microgrids, analyses and simulates the mathematical model of key converters, and introduces their control strategies. This article adopts a hybrid AC-DC microgrid for research purposes and proposes a time-period-controlled energy management strategy for the photovoltaic-storage hybrid AC-DC microgrid in the construction area of the Sichuan-Tibet Railway. The simulation results demonstrate that the AC-DC microgrid in the construction area based on the proposed time-period-controlled energy management strategy could effectively meet the load demands of different time periods and provides power to the electric equipment used in the construction area of the Sichuan-Tibet Railway.
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