上海科技大学知识管理系统

Enabled by the Internet of Things technology, effective control and management of critical assets such as energy storage in electric power systems is of great interest. This paper proposes a two-stage energy management framework to minimize the degradation and equivalent hydrogen consumption of electric-hydrogen hybrid energy storage systems in the context of islanded microgrids. The first stage minimizes the system degradation by optimizing the start-stop states of the hydrogen components including the electrolyzer and the fuel cell. The logic variables associated with the start-stop states and the component reference power are optimized in the first stage. The second stage minimizes the system equivalent hydrogen consumption while minimizing the deviation of the component power with respect to the component reference power determined in the first stage. The objective function of the second stage introduces two weights to measure the contributions of the battery and the hydrogen components to the system equivalent hydrogen consumption, which are defined based on the two virtual forces related to the battery state of charge (SOC) and the hydrogen storage tank state of hydrogen charge (SOHC). Offline and real-time simulations demonstrate the effectiveness of the framework in properly allocating the net load power to the battery and the hydrogen components to optimize the two objectives. Furthermore, the effects of the virtual forces on the SOC, SOHC, and system equivalent hydrogen consumption are investigated.