计及运行风险的配电网故障后供电恢复决策及广义动态孤岛划分  

Power Restoration Decision and Generalized Dynamic Islanding Strategy After Distribution Network Failure Considering Operational Risks

作　　者：李振坤 张天翼 徐冰雁 赵向阳 叶影 符杨 LI Zhenkun;ZHANG Tianyi;XU Bingyan;ZHAO Xiangyang;YE Ying;FU Yang(Offshore Wind Power Research Institute,Shanghai University of Electric Power,Yangpu District,Shanghai 200090,China;State Grid Shanghai Electric Power Company,Pudong New Area,Shanghai 200120,China)

机构地区：[1]上海电力大学海上风电研究院,上海市杨浦区200090 [2]国网上海市电力公司,上海市浦东新区200120

出　　处：《现代电力》2025年第2期281-292,共12页Modern Electric Power

基　　金：国家电网有限公司总部科技项目“含大规模分布式电源和多微网的配电系统柔性控制技术研究及应用”(52093220000H)。

摘　　要：当配电网发生重大故障时,合理的孤岛运行方案对于负荷供电恢复以及系统韧性提升具有重要意义。因此,深入研究了利用传统联络线和新兴分布式电源(distributed generation,DG)对配电网故障停电区域进行综合供电恢复的问题。首先,通过将联络线路等效为虚拟DG,使得该综合供电恢复问题统一简化为基于DG的广义孤岛划分问题;然后,为了充分量化故障时段内的孤岛运行风险,从功率平衡和电压稳定角度定义了孤岛运行风险指标,并基于机会约束优化模型提出了孤岛运行风险的动态约束方法;接着,提出了计及运行风险的配电网广义动态孤岛划分策略,该策略可根据DG出力、负荷时序变化、节点电压水平等风险因素,动态调整孤岛范围,在最大程度利用故障时段内DG资源的同时,保障孤岛运行的稳定性与持续性;针对动态孤岛划分方案求解难度高的问题,利用改进的分支定界法,结合启发式算法,求解和动态修正孤岛方案,保证了突发事故下恢复决策的合理性和时效性。最后,基于40节点的配电网算例进行仿真实验和分析,验证了所提方案的有效性。A reasonable islanding operation strategy is of great significance for power restoration as well as system resilience enhancement when major failures occur in the distribution network.Therefore,the problem of utilizing traditional contact lines and emerging distributed generation(abbr.DG)to restore integrated power to outage areas in the distribution network was profoundly studied.Firstly,the integrated power restoration problem was uniformly simplified as a generalized DG-based islanding problem by equating the contact lines to virtual DGs.Secondly,to adequately quantify the risk of islanding operation during failure hours,the islanding operation risk indicators were defined from the perspectives of power balance and voltage stability,and a dynamic constraint method for islanding operation risk was proposed based on the opportunity constrained optimization model.Subsequently,a generalized dynamic islanding strategy for distribution networks considering operational risks was proposed.This strategy can dynamically adjust the island range based on risk factors such as DG output,load timing changes,and node voltage levels,maximizing the utilization of DG resources during fault periods while ensuring the stability and sustainability of island operation.In allusion to the problem of high difficulty in solving the dynamic islanding strategy,the improved branch-and-bound method in combination with the heuristic algorithm was used to solve and dynamically modify the islanding strategy to ensure the rationality and timeliness of recovery decisions under emergencies.Finally,simulation experiments and analysis were carried out based on a 40 node distribution network example to verify the effectiveness of the proposed method.

关 键 词：配电网 供电恢复 广义孤岛 动态孤岛划分 运行风险 

分 类 号：TM73[电气工程—电力系统及自动化]