区域电-气综合能源系统故障恢复与维修协调优化策略

Coordinative Optimization Strategy for Fault Recovery and Maintenance of Regional Integrated Electricity-Natural Gas System

极端灾害事件的频发严重威胁区域电-气综合能源系统(Regional Integrated Electricity-Natural Gas System,RIENGS)的安全可靠运行,协调故障恢复与维修策略可有效提升系统的韧性。针对深度耦合的RIENGS,文中提出一种面向韧性提升的灾中-灾后两阶段故障恢复与维修调度的协调优化策略。首先,在灾中第一阶段,建立RIENGS故障快速恢复模型,考虑负荷优先级和系统拓扑重构策略,在应急恢复阶段实现重要负荷的快速恢复;然后,在灾后第二阶段,以系统总负荷损失成本最小和维修时间最少为目标函数,建立RIENGS网络重构和维修调度优化模型,并将模型转化为混合整数二阶锥规划(Mixed-integer Second-Order Cone Programming,MISOCP)问题;最后,通过13节点配电网和7节点配气网进行算例分析,验证了所提方法在减少RIENGS负荷损失方面的有效性。

The frequent occurrence of extreme disasters seriously threatens the safe and reliable operation of the regional integrated electricity-natural gas system(RIENGS).Coordinating fault recovery and maintenance strategies can effectively improve system resilience.For the deeply coupled RIENGS,this paper proposes a coordinated optimization strategy of two-stage fault recovery and maintenance scheduling during and post-disaster.Firstly,in the first stage of the disaster,a fast recovery model of the RIENGS is established,considering the load priority and network reconfiguration strategy to realize the rapid recovery of important loads in the emergency recovery stage.Then,in the second stage of post-disaster,the network reconfiguration and maintenance scheduling optimization model of the RIENGS is established with the objective function of minimizing the total cost of load loss and the maintenance time,and the model is transformed into a mixed integer second-order cone programming(MISOCP)problem.Finally,the effectiveness of the proposed method in reducing the load loss of the RIENGS is verified by numerical examples of a 13-node distribution network with a 7-node gas distribution network.