摘要
为满足高压大功率应用领域的需要和实现波形的多重移相叠加,主电路采用了级联多电平逆变器。主要研究逆变器消谐模型求解的同伦算法,分析消谐模型的建立,同伦映射的特点及同伦方程的求解方法,并用实例进行分析,证明了此方法的正确性。该研究表明:采用同伦算法进行逆变器消谐模型的求解,具有收敛范围宽,收敛速度快等显著优点。若能提高硬件的运行速度,实现消谐的实时控制是可行的。最后给出了Matlab仿真结果和DSP实验结果。
To meet the need of using the high voltage and power equipments and implement the multiple- phase shifting, cascaded multilevel inverter is adopted in the main circuit. The Homotopy algorithm of the inverter harmonic elimination model is presented and the Homotopy mapping is analysed in this paper. The convergence of solutions from the gained Homotopy equations is analysed. Examples prove the correctness of this method. The study shows that the solutions of the inverter harmonic elimination model are solved by Homopoty algorithm has many advantages such as large convergence margin,quick convergence etc. If Homopoty mapping is felicitous and calculation speed is high, the real - time harmonic elimination PWM control is possible. The simulink results of MATLAB and the experimental results of DSP are given in the end.
出处
《现代电子技术》
2009年第8期173-177,共5页
Modern Electronics Technique
关键词
同伦算法
非线性方程组
消谐模型
波形叠加
Homotopy algorithm
nonlinear transcendental equations
harmonic elimination model
wareform superposition
