基于能量耗散的电压源型双馈风电机组轴系扭振阻尼特性分析  

Analysis of Torsional Vibration Damping Characteristics of Voltage Source Doubly Fed Wind Turbine Shaft System Based on Energy Dissipation

作　　者：孙正龙 李明达 郝舒宇 姜超[1] 蔡国伟 SUN Zhenglong;LI Mingda;HAO Shuyu;JIANG Chao;CAI Guowei(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology(Northeast Electric Power University),Ministry of Education,Jilin 132012,Jilin Province,China)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林省吉林市132012

出　　处：《电网技术》2024年第12期4855-4864,I0007-I0009,I0006,共14页Power System Technology

基　　金：国家自然科学基金面上项目(52277084)。

摘　　要：电压源型双馈风电机组具有建立和支撑电压的能力从而受到了广泛关注,然而采用电压源控制的双馈风电机组(doubly fed induction generators,DFIG)响应电网动态会更易引起轴系扭振问题,甚至恶化扭振阻尼。因此从能量耗散的角度分析了轴系扭振的阻尼特性,并提出了轴系扭振阻尼的量化表征方法。首先,基于轴系的二质量块传动模型构建了轴系的暂态能量函数;在此基础上,提取出轴系的势能和耗散能量,表征轴系振荡过程中能量的积累和耗散效应,并探究了能量耗散与特征值实部之间的联系;分析了不同的虚拟同步机(virtual synchronous generator,VSG)控制参数对轴系扭振阻尼特性的影响;并定义了能量耗散因子用以量化表征轴系扭振的阻尼。最后对提出的结论与方法进行了仿真验证。Voltage source doubly fed wind turbines have attracted widespread attention for their ability to establish and support voltage.However,doubly-fed induction generator(DFIG)controlled by voltage sources are more likely to cause shaft torsional vibration problems and even deteriorate torsional damping in response to grid dynamics.Therefore,this article analyzes the damping characteristics of shaft torsional vibration from the perspective of energy dissipation and proposes a quantitative characterization method for shaft torsional vibration damping.Firstly,a transient energy function of the shaft system was constructed based on a two-mass block transmission model of the shaft system.On this basis,the potential energy and dissipated energy of the shaft system were extracted to characterize the accumulation and dissipation effects of energy during the oscillation process of the shaft system,and the relationship between energy dissipation and the real part of the eigenvalues was explored;Analyzed the influence of different virtual synchronous generator(VSG)control parameters on the torsional damping characteristics of the shaft system;And an energy dissipation factor was defined to characterize the damping of shaft torsional vibration quantitatively.Finally,simulation verification was conducted on the conclusions and methods proposed in this article.

关 键 词：电压源型双馈风电机组 扭振 能量耗散 阻尼 虚拟同步机 

分 类 号：TM721[电气工程—电力系统及自动化]