面向暂态分析的分布式光伏集群多步分群与等值建模  

Multi-step Grouping and Equivalent Modeling of Distributed Photovoltaic Clusters for Transient Analysis

作　　者：叶林[1] 施媛媛 王启亨 彭艺术 裴铭 YE Lin;SHI Yuanyuan;WANG Qiheng;PENG Yishu;PEI Ming(College of Information and Electrical Engineering,China Agricultural University,Beijing 100083,China)

机构地区：[1]中国农业大学信息与电气工程学院,北京市100083

出　　处：《电力系统自动化》2023年第14期72-81,共10页Automation of Electric Power Systems

基　　金：国家电网公司科技项目(5100-202155018A-0-0-00);国家自然科学基金资助项目(U22B20117)。

摘　　要：传统的光伏建模方法已无法满足高渗透率分布式光伏集群的规模化建模需求。针对区域内分布式光伏集群接入点分散、建模工作量大以及建模过程中动态差异性大等问题,提出一种面向暂态分析的分布式光伏集群多步分群等值建模方法。首先,考虑分布式光伏集群所在区域节点电气耦合程度,根据节点电压灵敏度矩阵划分区域并定义区域聚类识别号。其次,将分布式光伏区域聚类识别号纳入分布式光伏集群划分指标,同时选取分布式光伏电站辐照度、逆变器控制参数作为分群指标,完成分布式光伏集群划分。最后,基于同调等值思想建立分布式光伏的多机等值模型,并在PSCAD中仿真验证了文中所提多步分群方法和所建立的等值模型是合理有效的。The traditional photovoltaic(PV)modeling method has been unable to meet the demand for large-scale modeling of distributed PV clusters with high penetration rate.To address the problems of scattered access points of distributed PV clusters in the region,large modeling workload and large dynamic variability in the modeling process,a multi-step grouping and equivalent modeling method of distributed PV clusters for transient analysis is proposed.Firstly,considering the electrical coupling degree of the nodes in the region where the distributed PV clusters are located,the region is divided according to the node voltage sensitivity matrix and the regional clustering identification number is defined.Secondly,the distributed PV area cluster identification number is incorporated into the distributed PV cluster division index,while the light illumination level of distributed PV power station and inverter control parameters are selected as cluster division indices to complete the distributed PV cluster division.Finally,based on the idea of homogeneous equivalence,a multi-machine equivalent model of the distributed PV is established and simulated in PSCAD to verify that the proposed multi-step grouping method and the established equivalent model are reasonable and effective.

关 键 词：分布式光伏集群 电气距离 多步分群 等值建模 暂态分析 

分 类 号：TM615[电气工程—电力系统及自动化]