中国电机工程学报2024，Vol.44Issue(14)：5463-5472,中插3,11.DOI:10.13334/j.0258-8013.pcsee.231819
提高新能源场站稳定性的构网型与跟网型变流器容量配比估算
Estimation of Capacity Ratios Between Grid-forming and Grid-following Converters for Improving the Stability of Renewable Energy Stations
摘要
Abstract
The large-scale integration of renewable energy into the power grid leads to the decrease of system voltage support strength,which is usually characterized by its short circuit ratio(SCR).This results in stability issues such as static voltage stability problems and sub/super synchronous oscillation.Grid-forming(GFM)converters have effective voltage support capability,and thus equipping renewable energy stations with a certain proportion of GFM converters can improve the stability of the system.However,the analytical relationship between the capacity of GFM converters and the stability margin is unclear,which makes it difficult to estimate the required proportions of GFM converters theoretically.To fill this gap,this paper discusses the estimation method for the required capacity ratios between GFM converters and grid-following(GFL)converters to maintain small signal stability.First,based on the voltage-source equivalent analysis of GFM converters,the influence of the capacity ratios on the system strength and stability margin is analyzed through the generalized short circuit ratio(gSCR)index.Then,considering the practical engineering scenario of updating some wind turbines to GFM control or installing new GFM converters,the typical values of the capacity ratios are discussed based on typical parameters of step-up transformers and the related industry standards as boundary conditions.The validity of the conclusion is verified by simulation results of a typical multi-wind-farm system.关键词
构网型变流器/容量配比/广义短路比/系统强度Key words
grid-forming converter/capacity ratio/generalized short circuit ratio/system strength分类
信息技术与安全科学引用本文复制引用
辛焕海,王宇轩,刘晨曦,鞠平,马骏超,但扬清,黄林彬..提高新能源场站稳定性的构网型与跟网型变流器容量配比估算[J].中国电机工程学报,2024,44(14):5463-5472,中插3,11.基金项目
国家电网有限公司科技项目:面向强鲁棒性的跟网/构网型新能源多场站混合组网规律和协调方法(5108-202218280A-2-435-XG). Science and Technology Project of State Grid Corporation of China:Strong Robustness-oriented Hybrid Networking Rule and Coordination Method for Grid-Following or Grid-Forming Multiple Renewable Energy Stations(5108-202218280A-2-435-XG). （5108-202218280A-2-435-XG）
