考虑分布式新能源的有源综合负荷模型  

Active Synthesis Load Model Considering Distributed Renewable Energy Source

作　　者：兰天楷 孙华东 王琦 赵兵 Lan Tiankai;Sun Huadong;Wang Qi;Zhao Bing(National Key Laboratory of Grid Security China Electric Power Research Institute,Beijing 100192 China)

机构地区：[1]电网安全全国重点实验室(中国电力科学研究院有限公司),北京100192

出　　处：《电工技术学报》2024年第23期7365-7378,共14页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(52307152);国家资助博士后研究人员计划(GZB20230688)资助。

摘　　要：中国分布式新能源装机容量的不断增加,已成为影响大电网安全稳定的重要因素。目前的分布式新能源等值建模方法尚不成熟,难以用于工程实际中的大电网仿真分析。为此,该文首先介绍了大电网分析中的分布式新能源模型现状,探讨了分布式新能源等值模型的工程要求;然后以大规模工程应用为目标,提出了“含分布式新能源的有源综合负荷模型”的建模思路;最后提出了该模型的结构及参数计算方法,介绍了所提方法在中国S省初步应用的具体案例。应用效果表明,该文提出的有源综合负荷模型能满足高比例分布式新能源的大电网建模、仿真分析需求,具备大规模工程应用潜力。Distributed renewable energy(DRE)is experiencing a rapid growth worldwide,and gradually becomes a significant factor that influences stability of bulk power systems.In the year 2022,the increasement of distributed photovoltaic in China has exceeded 51 GW,far exceeding the aggregate photovoltaic increasement.The installed capacity of DRE accounts for over 50%of the total renewable energy sources in several provinces,and peak DRE power output reaches 30%of the overall load power.Bulk power system incidents related to DRE have been reported in countries such as Australia and the United States.It is revealed that current bulk power system analyses inadequately consider the impact of DREs.However,it is impossible to model every single DRE in bulk power system analysis,as they are with a very large quantity,and integrated in very low voltage level.Although aggregation methods are proposed for renewable energy sources,the methods mainly aim at aggregate renewables.DREs are generally mixed with power loads,and are unsuitable for the methods.In the early stages of DRE development,they are simply considered as“negative power loads”in bulk power system analysis.This modeling approach is too simplistic for regions with high penetration.To resolve the problem,some power system operators utilize a simplified distribution grid model.However,such model consists too many nodes for bulk power systems,which can comprise hundreds of distribution grids.To address the modeling challenges of DRE in bulk power system simulation and analysis,measurement-based,data-driven methods are widely utilized.The obtained models are known as generalized load models,microgrid equivalent models,etc.,considering both DREs and loads.While the methods are widely seen in literatures,limited engineering application is reported.In large power systems,it is difficult to acquire sufficient transient response data for measurement-based modelling method.Besides,the methods hardly offer physical relations between the equivalent parameters and actual power c

关 键 词：大电网 分布式新能源 等值建模 综合负荷模型 安全稳定分析 

分 类 号：TM711[电气工程—电力系统及自动化]