计及动态频率稳定性的弹性配电网预防-紧急协同调度方法  

Coordination of Preventive and Emergency Dispatch for Resilient Distribution Networks Considering Dynamic Frequency Stability

作　　者：蔡胜 谢云云[1] 张玉坪 王剑晓 朱皓斌[3] 郭健 CAI Sheng;XIE Yunyun;ZHANG Yuping;WANG Jianxiao;ZHU Haobin;GUO Jian(School of Automation,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu Province,China;National Engineering Laboratory for Big Data Analysis and Application(Peking University),Haidian District,Beijing 100871,China;NR Electric Co.,Ltd.,Nanjing 211102,Jiangsu Province,China)

机构地区：[1]南京理工大学自动化学院,江苏省南京市210094 [2]大数据分析与应用技术国家工程实验室(北京大学),北京市海淀区100871 [3]南京南瑞继保电气有限公司,江苏省南京市211102

出　　处：《中国电机工程学报》2024年第24期9607-9617,I0009,共12页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家自然科学基金项目(52177090);江苏省卓越博士后计划;中央高校基本科研业务费专项资金(30923010301)。

摘　　要：自然灾害引发配电网中发生紧急故障时,利用分布式电源构建孤岛微网对重要负荷进行分区供电,能有效减少停电损失,提升配电网弹性。传统弹性配电网调度方法主要关注故障前后系统的静态安全约束,未考虑微网建立过程中的动态频率特性,无法保证孤岛微网的安全建立。为此,该文提出一种计及微网建立过程中动态频率稳定性的弹性配电网预防-紧急协同调度方法。以运行成本最小为目标,构建配电网预防-紧急协同调度随机优化模型。基于灾前预调度及灾后分区运行方案,量化分析微网建立过程中的功率不平衡,并基于时域离散频率响应模型,建立微网动态频率稳定约束。进一步对模型进行线性化处理,将其转化为混合整数规划问题进行求解。采用IEEE-37节点配电系统,对所提方法的有效性进行验证。When disaster-induced emergencies occur in distribution systems(DSs),distributed generators are used to form islanded microgrids(MGs)and ensure the constant power supply to critical loads,which is essential to reducing outage losses and enhancing system resilience.Traditional resilient DS dispatching approaches concentrate on static security constraints prior to and after the emergencies,but ignore the dynamic frequency characteristics during the islanding transition,thus failing to ensure the successful MG formation.This paper proposes a prevention and emergency coordinated DS dispatching method that considers dynamic frequency stability during the MG formation process.A stochastic DS dispatching model is formulated,with the objective of minimizing the total operating costs.Based on the preventive scheduling and the post-disaster partition schemes,the power imbalance during MG formation process is quantified.Frequency stability constraints are developed based on a time-dependent discretized frequency response model.Furthermore,nonlinear constraints are linearized,and the origin model is transformed to a mixed integer linear programming problem to facilitate its solution.The modified IEEE-37 node test distribution system is used to validate the effectiveness and superiority of the proposed method.

关 键 词：弹性配电网 微网 功率不平衡 预防-紧急协同 频率稳定 

分 类 号：TM73[电气工程—电力系统及自动化]