考虑多供电层级耦合的中低压配电网分布式光伏承载力一体化精细评估方法  

A Precise Distributed PV Hosting Capability Evaluation Method for MV and LV Distribution Network Considering the Coupling of Multiple Power Supply Layers

作　　者：王守相[1,2] 尹孜阳 赵倩宇 Wang Shouxiang;Yin Ziyang;Zhao Qianyu(Key Laboratory of Smart Grid of Ministry of Education Tianjin University,Tianjin 300072 China;Tianjin Key Laboratory of Power System Simulation and Control,Tianjin 300072 China)

机构地区：[1]天津大学智能电网教育部重点实验室,天津300072 [2]电力系统仿真控制天津市重点实验室,天津300072

出　　处：《电工技术学报》2025年第6期1930-1944,共15页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(52077149)。

摘　　要：随着国家“双碳”战略的持续推进,分布式光伏接入配电网的需求激增。然而,无序接入分布式光伏往往会超过配电网的承载能力,而导致安全风险。因此,需要“逐站、逐线、逐台区”对配电网光伏承载力进行评估,以指导分布式光伏高质量发展。该文提出一种考虑“变电站-馈线-台区”多供电层级耦合的中低压配电网分布式光伏承载力一体化精细评估方法。首先,构建包含光伏容量、能量渗透率、上送率、消纳率、弃光率的多维配电网分布式光伏现状评价指标,以精确地把控配电网光伏承载现状;其次,为整体把握配电网光伏承载能力,将其分为就地消纳能力和接纳能力两个层面开展测算,在就地消纳能力方面提出了基于配电网历史运行数据和源荷功率平衡度的测算方法,在接纳能力方面提出了基于就地消纳能力和设备热约束的测算方法;然后,考虑到接纳能力受到系统运行约束和多供电层级耦合的限制,提出了一种分层分区光伏接纳能力精细化校核方法,以实现光伏承载力的精确分析;最后,以华东某地多馈线配电网为例,开展了光伏承载现状和承载能力评估,结果证明了所提方法的有效性。With the continuous advancement of the national“Carbon Peaking and Carbon Neutrality”strategy,the connection demand of the distributed photovoltaic(DPV)to the distribution network(DN)has been substantially increased.However,the disorderly access of DPV often exceeds the hosting capacity of DNs,leading to safety risks.To promote the high-quality development of DPV,the National Energy Administration pointed out in the“implementation plan for the pilot assessment of grid hosting capacity for distributed photovoltaic access and enhancement measures”released in June 2023 that it is necessary to assess the DPV's open capacity station by station,line by line,and substation by substation,according to different supply levels.However,this plan needed to provide specific calculation and assessment methods.Effectively conducting the current status assessment of DPV hosting capacity in DNs across multiple supply levels and calculating the hosting capacity are urgent problems.Therefore,this paper considers the coupling relationships between supply levels and proposes a simple and efficient method for assessing hosting capacity.Firstly,based on the power supply scope,the DN can be divided into three supply levels:supply substation areas,feeders,and substations.For the three levels,the development status of DPV in the DN is evaluated from five aspects,including DPV capacity penetration rate,DPV energy penetration rate,DPV power export rate,DPV local consumption rate,and curtailment rate.These five evaluation indicators,derived from load data and DPV generation data at different supply levels,comprehensively assess of the DPV generation status in different supply areas.Taking the energy penetration rate as an example,if it is 100%,it may seem like a balance between supply and demand.However,if the load is entirely at night,the local consumption rate of DPV power would be 0,which is not a good state for DPV development.Secondly,an assessment indicator system is constructed for DPV local consumption capability at different

关 键 词：配电网 分布式光伏 接纳能力 消纳能力 

分 类 号：TM614[电气工程—电力系统及自动化]