摘要
对新能源多场站短路比(multiplerenewableenergy stations short circuit ratio,MRSCR)进行改进,提出一种实时临界短路比(critical short circuit ratio,CSCR)指标的求取方法,实现静态电压稳定性判别标准与临界短路比算法的统一。首先,基于MRSCR的定义分析其优缺点及适用性,在此基础上结合所提出的计及新能源出力特性的扩展雅可比矩阵,得到了新能源多场站临界短路比的求取方法;其次,理论分析了MRSCR在不同因素影响下的变化规律;最后,依托电力系统全数字仿真装置(advanced digital power system simulator,ADPSS)对新能源多场站临界短路比的准确性和有效性以及MRSCR的影响因素进行了仿真验证。仿真结果表明,所提临界短路比能够准确判定系统的临界稳定状态,评估失稳风险,且减小动态感应电动机比重、增加并联电容器容量、新能源并网点位置靠近系统侧均对MRSCR的提升有显著效果。
In this paper,the multiple renewable energy stations short circuit ratio(MRSCR)is improved,and a method for calculating the critical short circuit ratio(CSCR)in real time is proposed to unify the static voltage stability assessment criteria with the critical short circuit ratio algorithm.Firstly,based on the definition of MRSCR,its advantages,disadvantages,and applicability are analyzed.On this basis,combined with the proposed extended Jacobian matrix that takes into account the output characteristics of renewable energy,a method for calculating the critical short circuit ratio of multiple renewable energy stations is obtained.Secondly,the variation rules of MRSCR under the influence of different factors are theoretically analyzed.Finally,relying on the advanced digital power system simulator(ADPSS),the accuracy and effectiveness of the critical short circuit ratio of multiple renewable energy stations,as well as the influencing factors of MRSCR,are verified through simulation.The simulation results show that the proposed critical short circuit ratio can accurately determine the critical stability state of the system and assess the risk of instability.Moreover,a decrease in the proportion of dynamic induction motors,an increase in the capacity of parallel capacitors,and a location of the new energy connection point closer to the system side all have a significant effect on the improvement of the MRSCR.
作者
刘洪波
李倩倩
石鹏
王铎皓
王曦
孙黎
刘庸
LIU Hongbo;LI Qianqian;SHI Peng;WANG Duohao;WANG Xi;SUN Li;LIU Yong(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education(Northeast Electric Power University),Jilin 132012,Jilin,China;Electric Power Research Institute of State Grid Sichuan Electric Power Company,Chengdu 610000,Sichuan,China)
出处
《电网与清洁能源》
北大核心
2025年第7期94-101,106,共9页
Power System and Clean Energy
基金
国家电网公司科技项目(5100-202226021A-1-1-ZN)。
关键词
临界短路比
电压支撑强度
新能源多场站短路比
扩展雅可比矩阵
负荷模型
critical short circuit ratio
voltage support strength
multiple renewable energy stations short circuit ratio(MRSCR)
extended Jacobian matrix
load model
