大规模新能源集群接入弱电网的消纳能力评估方法  

Evaluation Method of Consumption Ability of New Large Scale Energy Clusters Connected to Weak Grids

作　　者：丁坤 陈博洋 秦建茹 刘永成 杨昌海 刘德祺 孙亚璐 李海波 DING Kun;CHEN Boyang;QIN Jianru;LIU Yongcheng;YANG Changhai;LIU Deqi;SUN Yalu;LI Haibo(State Grid Gansu Electric Power Company Economic and Technological Research Institute,Lanzhou 730050,China;Sichuan Energy Internet Research Institute-Tsinghua University,Chengdu 610213,China)

机构地区：[1]国网甘肃省电力公司经济技术研究院,兰州市730050 [2]清华四川能源互联网研究院,成都市610213

出　　处：《电力建设》2023年第11期86-94,共9页Electric Power Construction

基　　金：国家自然科学基金联合基金项目(U23B200046);中国电机工程学会青年人才托举工程项目(JLB-2022-97);四川省科技计划资助项目(2023YFSY0032)。

摘　　要：高比例新能源接入区域系统强度弱,已经逐步成为制约新能源消纳的重要因素,因此亟需提出一种适用于新能源集群弱电网系统的新能源消纳能力评估方法。首先基于容量短路比指标计算方法,并以临界短路比指标约束建立了新能源消纳能力与新能源并网点系统强度之间的关联,阐述了弱电网系统制约新能源消纳的机理,并分析了无功补偿方式对弱电网系统新能源消纳的提升机理;然后,在传统时序生产模拟算法基础上,加入短路比约束,提出一种考虑短路比约束的时序生产模拟模型,以准确评估弱电网系统新能源消纳能力。最后,结合我国“三北”地区某新能源汇集送端系统工程,开展了基于短路比约束的弱电网系统新能源消纳评估应用研究,并进一步量化分析了各无功补偿方式对新能源消纳提升的效果。The high proportion of new energy access to regional systems is weak and has gradually become a critical factor restricting the consumption of new energy.Therefore,there is an urgent need to propose a new energy consumption capacity evaluation method suitable for new weak energy cluster grid systems.First,based on the calculation method of the capacity short-circuit ratio(SCR-S)index and the constraint of the critical short-circuit ratio(CSCR)index,the relationship between the new energy consumption capacity and the strength of the grid-connected system is established.The mechanism of the weak grid system that restricts new energy consumption is expounded,and the improvement mechanism of reactive power compensation for the new energy consumption of the weak grid system is analyzed.Second,based on the traditional time-series production simulation algorithm,a short-circuit ratio(SCR)constraint is added,and a time-series production simulation model considering the SCR constraint is proposed to accurately evaluate the new energy consumption capacity of the weak grid system.Finally,combined with anew energy collection and transmission system project in the three northern regions of China,the application research of new energy consumption evaluation of weak grid systems based on the SCR constraint is conducted,and the effect of reactive power compensation methods on new energy consumption is further analyzed quantitatively.

关 键 词：短路比约束 时序生产模拟 无功补偿 新能源消纳 弱电网系统 

分 类 号：TM73[电气工程—电力系统及自动化]