垂直轴永磁同步风力发电系统建模及瞬时功率控制策略

Modeling and instantaneous power control strategies of VAWT-PMSG power generation system

以垂直轴风轮(VAWT)和永磁体励磁多极直驱式同步风力发电机组(D-PMSG)为对象,建立了包括风力机模型、传动系统模型和发电机模型的垂直轴永磁同步风力发电系统的数学模型及结构,提出对有功功率、无功功率进行瞬时控制策略:通过频率控制环和电压控制环对负载或并网瞬时有功功率和无功功率进行分解计算,得到逆变器输出电流参考值,与实际的逆变器输出电流测量值比较后产生控制波,再与定频三角载波信号比较,产生PWM控制信号控制逆变器的各桥臂导通和关断。运用Matlab/Simulink建立了系统仿真模型,对有功功率、无功功率瞬时控制策略进行仿真,结果验证了该模型的合理性及控制策略的正确性和可行性。

The mathematical model and architecture of wind power generation system with VAWT（Vertical Axis Wind Turbine） and D-PMSG（Directly driven Permanent Magnet Synchronous Generators） is constructed, including wind turbine model, drive train model and generator model. Strategies for instantaneous active and reactive power control are presented. The instantaneous active and reactive powers feeding to load or grid are decoupled and calculated to get the reference current of inverter output through voltage and frequency control loops, which is compared with its measured current to generate the control wave. It is then compared with the fixed-frequency triangular carrier wave to generate PWM signals for the on-off control of inverter arms. The proposed strategies are simulated with Matlab/Simulink, and results have verified its correctness and feasibility.