中国电力2024，Vol.57Issue(7)：238-246,9.DOI:10.11930/j.issn.1004-9649.202312081
汽轮机发电机组宽频带阻抗建模及次/超同步振荡分析
Broadband Impedance Modeling and Sub/Super-synchronous Oscillation Analysis of Steam Turbine Generator
摘要
Abstract
Impedance-based modeling and analysis method is currently one of the effective tools to analyze and solve the problem of renewable energy grid-connected broadband oscillation.Centralized development of long-distance transmission is an important form of renewable energy development and utilization in China.Among the power generation equipment in the renewable energy base,the impedance model of wind and solar power generation equipment has been built perfectly,but the current broadband impedance model of the steam turbine generator has some simplification,failing to completely reflect the broadband impedance characteristics of the steam turbine generator.Based on the frequency-domain small-signal modeling method,a broadband impedance model of the steam turbine generator containing the prime mover,speed governor,exciter system,shaft system,and synchronous generator was established.A simulation model of a steam turbine generator was built in Matlab/Simulink,and the correctness of the proposed model was verified by frequency sweeping.The influence of different links on the impedance was analyzed.Finally,the effectiveness of the proposed model in the analysis of the sub/super-synchronous oscillation problem was verified by studying a steam turbine generator connected to the grid via a series compensation device.关键词
阻抗建模/汽轮发电机/次同步振荡/轴系建模/串联补偿Key words
impedance modeling/steam turbine generator/sub-synchronous oscillation/shaft system modeling/series compensation引用本文复制引用
赵牧驰,汪海蛟,刘纯,何国庆,孙艳霞,王盼盼..汽轮机发电机组宽频带阻抗建模及次/超同步振荡分析[J].中国电力,2024,57(7):238-246,9.基金项目
国家电网有限公司科技项目(双碳目标下支撑富能源弱电网型区域电力清洁低碳供应的关键技术研究与应用,5100-202136562A-0-5-SF). This project is supported by Science and Technology Project of SGCC(Research and Application of the Key Technologies Supporting the Clean and Low-carbon Power Supply in Regions with Plentiful Resources and Weak Power Grid under the Dual-carbon Goal,No.5100-202136562A-0-5-SF). （双碳目标下支撑富能源弱电网型区域电力清洁低碳供应的关键技术研究与应用,5100-202136562A-0-5-SF）
