交流励磁变速恒频风力发电系统建模与仿真

引入了交流励磁变速恒频风力发电系统中基于定子磁链和定子电压定向的矢量变换控制技术,以PSCAD/EMTDC为平台,针对整个交流励磁变速恒频风电系统从空气动力学系统到机电、控制系统建立了完整的动态模型,进行了追踪最大风能的变速恒频发电运行及网侧变换器控制的仿真研究,首次考查了以实际风电现场为模型的最大风能追踪效果,仿真结果表明了基于矢量变换控制策略所建立的风电系统可实现有功和无功功率的独立调节,满足变速恒频风力发电和最大风能捕获的需求,且实现了以实际风电现场环境为模型的最大风能追踪控制策略.

Modeling and Simulation of AC-Excited Variable-Speed Constant-Frequency (VSCF) Wind-Power Generation System

The vector transformation control technique oriented by the stator flux and the stator voltage in the AC excited Variable-Speed Constant-Frequency(VSCF)wind-power generation system was introduced.On the platform of PSCAD/EMTDC,the integrated model of the whole AC excited VSCF wind-power generation system was established,including air-dynamics system,mechatronics system and control system.The simulations of VSCF power-generation operation on capturing maximum wind-energy and grid-side converter control were carried out,for the first time the effect of maximum wind-energy capture based on actual wind farm circumstance was investigated.The simulation results testify that the established wind-power system on the basis of vector control strategies is able to implement the independent adjusting between active power and reactive power,meet the requirements of VSCF wind-energy generation and maximum wind-power capturing.