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清华大学学报(自然科学版)  2015, Vol. 55 Issue (11): 1253-1257    DOI: 10.16511/j.cnki.qhdxxb.2015.21.015
  电机工程 本期目录 | 过刊浏览 | 高级检索 |
电磁耦合调速风力发电机组的运行特性
陈基和, 林宇龙, 柴建云, 李杰
清华大学电力系统及发电设备控制和仿真国家重点实验室, 北京 100084
Operating characteristics of an electromagnetic coupler wind turbine generator system
CHEN Jihe, LIN Yulong, CHAI Jianyun, LI Jie
State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Tsinghua University, Beijing 100084, China
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摘要 电磁耦合调速风力发电机组与传统风力发电机组不同,通过电磁耦合器借助电磁转矩将风力机齿轮箱输出功率传递给直接并网的同步发电机。采用变频器供电的电磁耦合器具有快速灵活调节其电磁转矩的能力。该文提出了在传递风力机输出转矩的基础上,附加额外的转矩控制,以此来减小系统扰动对同步发电机的影响。搭建了风力发电机组单机无穷大电网的系统模型,探讨转矩调节控制策略与手段。在MATLAB Simulink环境下,对系统干扰甚至故障状态下的动态特性进行分析,仿真结果表明:与只有励磁和风力机输入功率调节机组相比,增加了附加转矩控制的系统暂态稳定性和动态响应过程有较大的改善,充分满足低电压穿越要求,增强了对电网电压的支撑能力。
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陈基和
林宇龙
柴建云
李杰
关键词 变速恒频风力发电机组电磁耦合器低电压穿越附加转矩控制    
Abstract:The electromagnetic coupler(EMC) wind turbine generator system(WTGS) is distinct from conventional wind turbines in that the synchronous generator is directly connected to the power gird and the output power is passed from the wind turbine gearbox via the EMC. The EMC with an inverter power supply can quickly and flexibly change the torque. This analysis includes additional torque control besides the wind turbine output torque to reduce the influence of system disturbances on the synchronous generator. WTGS and infinite power grid models are used to investigate the torque control and strategy for various system disturbances and fault conditions on the MATLAB Simulink platform. The results show that the additional torque control improves the generator system transient stability and dynamic response compared with only excitation and wind turbine pitch control. The system enables low voltage ride through(LVRT) that enhances the ability to support the grid voltage.
Key wordsvariable speed constant frequency(VSCF)    wind turbine generator system(WTGS)    electromagnetic coupler(EMC)    low voltage ride through(LVRT)    additional torque control
收稿日期: 2013-04-15      出版日期: 2015-12-01
ZTFLH:  TM614  
引用本文:   
陈基和, 林宇龙, 柴建云, 李杰. 电磁耦合调速风力发电机组的运行特性[J]. 清华大学学报(自然科学版), 2015, 55(11): 1253-1257.
CHEN Jihe, LIN Yulong, CHAI Jianyun, LI Jie. Operating characteristics of an electromagnetic coupler wind turbine generator system. Journal of Tsinghua University(Science and Technology), 2015, 55(11): 1253-1257.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2015.21.015  或          http://jst.tsinghuajournals.com/CN/Y2015/V55/I11/1253
  图1 风力发电系统及其控制示意图
  图2 转矩控制示意图
  图3 发电机功角变化曲线
  图4 三相接地短路故障,发电机转速和转矩响应曲线
  图5 电网三相接地短路故障,发电机功角和电压响应曲线
  图6 电网发生80%的电压跌落,发电机转速与转矩响应曲线
  图7 电网发生80%的电压跌落,发电机功角和电压响应曲线
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