基于直流线路互联的区-隧供电系统弹性恢复策略  

Resilience Recovery Strategy for District-Tunnel Power Supply System Based on DC Line Interconnection

作　　者：孔惠文 马静 程鹏 贾利民 Kong Huiwen;Ma Jing;Cheng Peng;Jia Limin(State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University,Beijing 102206 China;China Institute of Energy and Transportation Integrated Development North China Electric Power University,Beijing 102206 China;State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University,Beijing 100044 China)

机构地区：[1]新能源电力系统全国重点实验室(华北电力大学),北京102206 [2]国家能源交通融合发展研究院(华北电力大学),北京102206 [3]轨道交通控制与安全国家重点实验室(北京交通大学),北京100044

出　　处：《电工技术学报》2024年第7期2089-2103,共15页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划资助项目(2021YFB1600202)。

摘　　要：在“双碳”目标下,以服务区光伏车棚、光伏隧道为代表的能源交通融合供电场景逐步普及,这使得形态开放且布局分散的区-隧供电系统在面临极端灾害或人为攻击时更为脆弱。为此,该文提出一种基于直流线路互联的区-隧供电系统弹性恢复策略。根据灾害前对直流线路的改造与韧性加固计划,首先,提出了基于直流线路被优先遍历的可行拓扑搜索策略,用于保障所提系统在极端灾害后的有效互联;其次,基于对故障负荷重要级权重的多层级分类策略,该文先后以重要负荷恢复量最大化和系统额外损耗最小化为目标构建了故障恢复目标函数,共同保证极端灾害发生后系统基于稀缺分布式能源的最大弹性恢复;再次,基于传统二阶锥松弛方法可能挣脱原始约束的缺陷,提出通过约束额外损耗中流经电流分量实现对混合整数二阶锥规划问题的收敛,确保所提模型在不同初始条件下的稳定适用;最后,通过涵盖区-隧供电系统的改进IEEE 123节点配电网进行仿真,验证了所提策略的有效性。To realize the goal of energy transition,it has become a future trend to fully develop the available space resources of highways and build a clean energy power supply system.Considering the limitations of a single power supply system and the intermittency of power generation,district-tunnel power supply(DTPS)systems that include multiple service areas or tunnel power supply systems have higher reliability.However,due to the dual threats of transportation and energy systems,as well as the dual fluctuations of distributed generation and traffic load electricity consumption,the proposed regional tunnel power supply system has a higher risk when facing extreme natural disasters and human attacks.Experts and scholars have conducted research on the resilience of multi-area systems.However,existing recovery strategies are all implemented under radial constraints,which often leads to the waste of scarce distributed resources.To address these issues,this paper proposes an elastic recovery strategy based on DC line interconnection.First,based on the pre-disaster DC line renovation and reinforcement plan,a deep priority traversal strategy for DC lines is proposed to ensure effective interconnection of the system in extreme events.Second,based on multi-level classification strategy,a two-stage fault recovery objective function is constructed to ensure the recovery index of the power system based on scarce distributed energy after extreme disasters,including priority recovery of important loads and minimization of additional losses.In addition,based on the traditional secondorder cone relaxation method,a convergence strategy for solving mixed integer second-order cone programming problems is proposed,which can overcome the limitations of original constraints and ensure the stable use of the proposed model under different initial conditions.Final,the improved IEEE 123-node power supply system covering DTPS system scenarios verified the stable applicability of the proposed strategy.The verification results indicate that althoug

关 键 词：区-隧供电系统 直流线路互联 深度优先遍历 弹性恢复 

分 类 号：TM619[电气工程—电力系统及自动化]