摘要
针对基于双馈感应发电机的变速风力发电机组轴系的特点,用等效集中质量法和动力学方程建立了机械传动机构动态的轴系模型,弥补了现有各种模型过于简化的不足。针对机械传动机构的动态模型,分别考虑了风机、发电机惯量及其传动轴系的阻尼系数与刚度系数对风力发电系统的瞬态性能影响,求出了机械传动机构动态轴系模型的自然振荡频率及其阻尼系数的解析表达式。仿真结果验证了理论分析的正确性,最后利用实验室所建风力发电地面模拟实验平台,基于可变惯量风机模拟器,改变不同的风机惯量值,验证了风机惯量对系统瞬态性能的影响,实验结果有力地支持了理论分析与仿真结果。
The shaft system of variable speed wind turbine generator set based on doubly-fed induction generator was modeled with equivalent lump mass method and dynamic equations, which makes up the over simplifications of models in literatures. For the danamic model of the mechanical transmission, wind turbine and generator inertia, damping and stiffness coefficient of the shaft chain all together were considered to study the influence on the wind power generation system dynamic performances. Then, the analytical expression of the natural oscillation frequency and its damping coefficient were obtained. The simulation results indicate the correctness of theoretical analysis. In the end, the influence of wind turbine inertia on wind power generation system dynamic performances was verified by the laboratory wind power generation emulation platform which include a variable inertia wind turbine simulator. The experimental results strongly support the theoretical analysis and simulation results.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2011年第8期1257-1263,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51077034)
关键词
动态轴系模型
阻尼系数
刚度系数
变惯量风机模拟器
danamic shaft model
damping coefficient
stiffness coefficient
variable inertia wind turbine simulator
