摘要
针对现有扭振控制中,难以平衡抑振效果和响应速度的关系,以及高、低速轴的阻尼比变化速率不同导致整体阻尼比难以调节的问题,提出了一种双馈风电机组轴系扭振抑制策略。首先推导了机械扭转角与电磁转矩的传递函数,通过引入等效阻尼和刚度分析了高低速轴机电耦合阻尼比的差异。其次对电气刚度抑制轴系扭振的机理进行分析,根据阻尼和刚度的协调作用,提出基于电气阻尼-刚度控制的轴系扭振抑制策略,得到电气阻尼-刚度控制下的轴系阻尼比变化趋势。最后在搭建FAST-MATLAB/Simulink联合仿真双馈风电机组模块的基础上,引入湍流风与电网暂降激励,对所提策略的抑振效果进行仿真验证。结果表明,相较于传统的阻尼控制,所提策略能够充分发挥传动链的机电强耦合作用,在保证响应速度的同时具有更好的抑振能力。
In order to solve the problem that it is difficult to balance the relationship between vibration suppression effect and response speed in the existing torsional vibration control,and it is hard to adjust the overall damping ratio due to the different change rates of damping ratio between high-speed shafting and low-speed shafting,a torsional vibration suppression strategy for doubly-fed wind turbine shafting is proposed.Firstly,the transfer function of mechanical torsional angle and electromagnetic torque is derived,and the dif⁃ference of electromechanical coupling damping ratio between high-speed shafting and low-speed shafting is analyzed by introducing equivalent damping and stiffness.Secondly,the torsional vibration suppression mecha⁃nism of stiffness for shafting is analyzed.According to the coordination of electrical damping and stiffness,a torsional vibration suppression strategy for shafting based on electrical damping and stiffness control is pro⁃posed,and the trend of shafting damping ratio under the electrical damping and stiffness control is obtained.Finally,based on the wind turbine module built on the FAST-MATLAB/Simulink joint simulation platform,the turbulence wind and grid sag excitation are introduced to verify the torsional vibration suppression effect of the proposed strategy.The results show that compared with the traditional damping control,the proposed method makes full use of the strong electromechanical coupling effect of the drive chain,which ensures the response speed and has better torsional vibration suppression ability.
作者
司金冬
柴兆森
李辉
龚立娇
王宾
张新
SI Jindong;CHAI Zhaosen;LI Hui;GONG Lijiao;WANG Bin;ZHANG Xin(College of Mechanical and Electrical Engineering,Shihezi University,Shihezi 832003,China;State Key Laboratory of Power Transmission Equipment and System Security and New Technology,Chongqing University,Chongqing 400044,China;State Key Laboratory of Control and Simulation of Power System and Generation Equipment,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2022年第1期140-147,共8页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51675354)。
关键词
双馈风电机组
轴系扭振抑制策略
电气刚度
响应速度
补偿控制
阻尼
doubly-fed wind turbine
torsional vibration suppression strategy for shafting
electrical stiffness
response speed
compensation control
damping
