摘要
以液压型风力发电机组为研究对象,针对其并网冲击问题,建立了风力发电机数学模型、定量泵-变量马达液压调速系统数学模型、同步发电机与励磁系统数学模型,推导了并网过程的冲击电流与冲击转矩数学模型。以数学模型为基础,提出了液压型风力发电机组并网冲击抑制方法,即通过发电机稳速控制、励磁电压控制和准同期监控相结合对机组并网冲击进行抑制。以30kV·A液压型风力发电机组实验台为仿真和实验基础,对机组并网冲击抑制展开研究。仿真和实验结果表明,所提出的并网冲击抑制方法对并网冲击转矩和冲击电流具有较好的控制效果,基本实现了机组柔性并网。
Taking a hydraulic wind turbine as the research object,mathematical models for wind turbine,fixed displacement pump-variable displacement motor of hydraulic system,synchronous generator and excitation system were established,for the problem of grid impact in hydraulic wind turbine.The mathematical models for impulse current and impact torque were derived.A suppression method for grid impact in hydraulic wind turbine was proposed,by the combination of generator speed control,excitation voltage control and quasi-synchronization monitoring.Using 30kV·A hydraulic wind turbine simulation platform as the simulation and experimental foundation,the grid impact suppression was researched.Simulation and experimental results show that the grid impact suppression proposed has good control effect for impulse current and impact torque,achieving the flexible gridconnection for generator.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2015年第15期1989-1994,共6页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51405423)
河北省青年基金资助项目(QN20132017)
燕山大学青年教师自主研究计划课题(13LGB005)
关键词
风力发电
液压传动
并网冲击
冲击抑制
wind power
hydraulic transmission
grid impact
impact suppression
