Scheduling of Mobile Rail Generators Capable of Uninterrupted Power Supply for Load Rescue
Quan Sui, Le Sun, Siyuan Yao, Jing Liang, Zhongwen Li, Chang Liu, Zhicheng Xie
Abstract
Mobile power sources based on trucks are unable to provide power support during transit for post-disaster distribution systems (DSs), leading to significant load interruptions. To address the problem, a new scheduling strategy of conceptual mobile rail generators (MRGs) capable of uninterrupted power supply for load restoration is proposed in this paper. First, a temporal-spatial energy continuous sharing model of MRGs which considers its adjustable power feedback to the catenary during movement, hydrogen refueling at the station and the mid-journey return behavior is presented. On this basis, the traction power system (TPS) integrating MRGs is developed as a dynamic energy channel between post-disaster islanded DSs, where the MRG's power feedback during movement is regulated in time to offset changes in catenary loss. Additionally, a load rescue strategy of the DS which dynamically selects balancing nodes is formulated. This scheduling model is solved by converting the MRG's real-time power feedback expression and TPS exchange power constraint related to variable electrical quantity into a fixed-impedance-based power equation, and a fixed-voltage-based power equation, respectively. Simulation studies on modified IEEE 33-node DS and IEEE 69-node DS demonstrate the proposed strategy could reduce the economic loss by at least 5.5%.