【作者】 何磊；

【导师】 张旭； 李新皓；

【作者基本信息】 华北电力大学(北京) ， 能源动力硕士（专业学位）， 2025， 硕士

【摘要】 在国家“双碳”战略背景下,大量分布式电源接入配网,导致局部过电压问题严重。分布式光伏和电动汽车等灵活性资源对配网也具备一定支撑潜力,如何充分利用其主动支撑能力,实现配电网电压的调节,已成为亟待解决的重要课题。电网集群调压作为一种适应现代新型配电系统的有效调压方式,逐渐受到广泛关注。现有的集群划分方法未能充分考虑光伏和电动汽车节点的主动电压支撑能力,导致集群调压时无功资源没有得到充分利用。面向集群调压的要求,基于考虑逆变器无功可调容量的无功电压支撑能力评估计算,建立了包含分布式光伏和电动汽车主动电压支撑能力、综合电气距离和邻近性评价指标的集群划分指标体系;在此基础上,提出了一种考虑主动电压支撑能力与综合电气距离的分布式灵活性资源集群划分方法,采用94节点10kV配电网典型算例进行仿真计算,通过模块度指标和无功分区质量函数验证了所提方法的有效性。基于上述集群划分结果,采用“集群内自主调节、跨集群协同调节”的集群两级协同调压架构,建立了以最小系统总电压偏差和最大调压效率因子为目标的调压优化控制模型,提出了基于NOA的配网集群电压优化控制策略,通过对上述94节点算例和贵州某县域10kV配网模型进行仿真分析,验证了所提模型和控制策略的有效性。更多还原

【Abstract】 Under the national "dual carbon" strategy,the large-scale integration of distributed generation into distribution networks has led to severe local overvoltage issues.Flexible resources such as distributed photovoltaics(PV)and electric vehicles(EVs)have the potential to support distribution networks.However,how to fully utilize their active support capability for voltage regulation has become a critical challenge.Cluster-based voltage regulation,as an effective approach compatible with modern distribution networks,has attracted growing attention.However,existing clustering methods often neglect the active voltage support capability of PV and EV nodes,resulting in underutilization of reactive power resources during voltage regulation.To address the needs of cluster-based voltage regulation,this study develops a clustering index system that incorporates the active voltage support capability—quantified based on the reactive power regulation range of inverters—along with composite electrical distance and proximity evaluation indices.On this basis,a clustering method for distributed flexible resources is proposed,taking into account both the active voltage support capability and composite electrical distance.Simulation studies on a typical 10kV 94-node distribution network demonstrate the effectiveness of the proposed method,verified using modularity and a reactive power partition quality function.Building upon the clustering results,a two-tier cooperative voltage regulation framework is developed,integrating "intra-cluster autonomous regulation" and"inter-cluster coordinated regulation." An optimization control model is formulated with the objectives of minimizing total system voltage deviation and maximizing the voltage regulation efficiency factor.Furthermore,a Nutcracker Optimizer Algorithm(NOA)-based voltage optimization control strategy is proposed.Simulations conducted on the 94-node test system and a 10 kV distribution network in a county of Guizhou Province validate the effectiveness of the proposed model and control strategy.更多还原