基于SPWM的小型风电逆变系统的建模与仿真研究

Modeling and Simulation of Small Wind Power Inverter System Based on SPWM

以小型风力发电系统为研究对象,重点研究其逆变环节的设计,通过比较分析,主电路选择高频变压器形式,控制电路采用电压瞬时值反馈控制。利用MATLAB/Simulink软件建立了风电逆变系统的电路模型,给出了基于SPWM(Sinusoidal PWM)电压反馈控制的系统设计与仿真。在突加干扰的情况下仿真模型能很快稳定,具有较强的抗干扰能力,仿真结果验证了系统设计的可行性。在此基础上,完成了基于芯片TL494、IR2110和SG3525A的风电逆变控制系统的硬件设计方案。

Taking the small wind power system as an object for studies, this paper focuses on the design of the inverter link. Through comparisons and analyses, the high frequency transformer form is chosen for the main circuit while the instantaneous voltage feedback control for the control circuit. The wind turbine inverter system circuit model is established by MATLAB/Simulink software, producing the system design and simulation of the voltage feedback based on SPWM （Sinusoidal PWM）. With interferences abruptly added, the circumstance simulation model can quickly get stable, indicating the model has strong anti-jamming ability. The simulation results verify the feasibility of the system design. On this basis, the hardware design scheme is completed for the wind power inverter control system based chips TL494, IR2110 and SG3525A.