考虑移动式储能的综合能源系统冰灾后抢修与调度协同优化

Cooperative optimization of emergency repair and dispatch for integrated energy system considering mobile energy storage after ice disaster

冰灾易造成大规模停电事故,此时综合能源系统中的热电耦合设备可协调电出力和热出力,降低损失。根据典型的气象数据模拟冰灾故障场景,建立除冰抢修、综合能源系统与移动式储能系统双层协同优化调度模型,以减少冰灾带来的不利影响。上层优化模型为保障综合能源系统的电网快速恢复供电的除冰抢修调度模型,下层优化模型为综合能源系统与移动式储能系统调度模型,上层的各故障线路除冰抢修进度与下层的各节点实时切负荷情况相互传递、交互优化,保障在短时间内抢修更多的故障线路的同时恢复更多的用电负荷,并充分利用热电联产机组灵活的热电比以优化综合能源系统调度,有效减少系统整体经济损失。另外,下层优化模型依据故障后综合能源系统的切负荷情况调度移动式储能系统,进一步减少系统切负荷损失,同时可提高综合能源系统韧性。通过算例仿真验证所提方法的有效性。

Ice disasters can easily cause large-scale power outages.In this case,the thermoelectric coupling equipment in the integrated energy system can coordinate electrical and thermal output to reduce losses.The ice disaster failure scenarios are simulated based on the typical meteorological data,the double-layer cooperative optimal dispatching model of emergency repair for melt ice,integrated energy system and mobile energy storage system is established,which can reduce the adverse effects of ice disaster.The upper-layer optimization model is the dispatching model of emergency repair for melt ice to ensure rapid power supply restoration of the power grid in the integrated energy system,and the lower-layer optimization model is the dispatching model of the integrated energy system and the mobile energy storage system.The emergency repair progress of melt ice for each fault line in the upper-layer and the real-time load shedding situation of each node in the lower-layer are communicated and optimized mutually,so as to ensure that more fault lines can be repaired in a short time while more power loads can be recovered,and the flexible thermo⁃electric ratio of cogeneration units is fully utilized to optimize the integrated energy system dispatch and effectively reduce the overall economic loss of the system.In addition,the lower-layer optimization model dispatches the mobile energy storage system according to the load shedding situation of the integrated energy system after failure,so as to further reduce the system load shedding loss and improve the resilience of integrated energy system.The effectiveness of the proposed method is verified by case study simulation.