摘要
开环模式谐振理论是阐释风电并网引起的电力系统振荡机理的研究成果,其中基于平均模型的离线时域仿真结果可信度存疑。为提升开环模式谐振的工程指导可靠度,首先基于硬件在环仿真,组建了用于验证开环模式谐振的半实物实验平台;其次建立双馈风电场并网系统的小信号模型,提出开环模式分析通用方法评估系统振荡风险;最后以两个算例进行了开环模式谐振现象的分析与实验。得到结论:硬件在环仿真的结果符合开环模式分析的结果,在开环模式谐振条件下,系统稳定性下降。留数法可以较为准确地预测系统闭环模式,系统参数的合理整定可以减小开环模式谐振带来的影响。
Open-loop mode resonance theory is the research result to explain the mechanism of power system oscillation caused by wind power integration in which the reliability of the off-line time-domain simulation results based on the average model in the theoretical research is questionable.Firstly,to improve the reliability of engineering guidance for the theory,based on hardware in the loop(HIL)simulation,a phisical experimental platform is established.Secondly,a small signal model of the grid-connected system of doubly-fed induction generator(DFIG)wind farm is built,and a general method of open-loop mode analysis is proposed to assess the oscillation risk of the system.Finally,two examples are used to analyze and experiment the phenomenon of open-loop mode resonance.It is concluded that the experiment results are consistent with the results of open-loop mode analysis.Under the condition of open-loop mode resonance,the stability of power system decreases.The residue method can accurately predict the closed-loop mode of the system,and the reasonable tuning of parameters can reduce the impact of open-loop mode resonance.
作者
陈江
杜文娟
杨佳
CHEN Jiang;DU Wenjuan;YANG Jia(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;Nari Group Co.,Ltd.,Nanjing 211106,China)
出处
《南方电网技术》
CSCD
北大核心
2024年第2期98-105,132,共9页
Southern Power System Technology
基金
国家自然科学基金资助项目(52077144)。
关键词
开环模式谐振
硬件在环仿真
双馈感应发电风电场
振荡风险
稳定性分析
open-loop mode resonance
hardware in the loop simulation
doubly-fed induction generator wind farm
oscillation risk
stability analysis
