实数编码遗传模拟退火算法SHEPWM控制技术

发布时间：2018-09-04 09:17

【摘要】：针对多电平逆变器SHEPWM(selected harmonic elimination pulse width modulation,SHEPWM)消谐模型的求解问题,提出一种遗传算法和模拟退火算法相融合的新型算法。该算法根据个体适应度值进行自适应交叉和变异操作,采用模拟退火算法进行个体更新,以增加种群的多样性,增强全局寻优能力,避免陷入局部最优,并以实数编码保存个体来提高计算精度。以二极管箝位三电平逆变器SHEPWM为例,给出了全调制度下的开关角度轨迹及较高调制度下的另外两组解,绘制了谐波失真含量(total harmonic distortion,THD)随调制度变化的曲线,并给出了详细的仿真结果。最后通过建立的二极管箝位三电平逆变器实验平台进行了实验验证,仿真和实验结果证明了该算法的正确性和可行性。
[Abstract]:Aiming at solving the harmonic elimination pulse width modulation (SHEPWM) model of multi-level inverter, a new algorithm based on genetic algorithm and simulated annealing algorithm is proposed. The algorithm performs adaptive crossover and mutation operations according to individual fitness values, and simulated annealing algorithm is used for individual updating. In order to increase the diversity of population, enhance the ability of global optimization, avoid falling into local optimum, and save individuals with real coding to improve the calculation accuracy, the switching angle trajectory of diode-clamped three-level inverter SHEPWM under full modulation and two other solutions under higher modulation are given, and the content of harmonic distortion (tot) is plotted. Finally, the experimental results of a diode-clamped three-level inverter platform are given to verify the correctness and feasibility of the proposed algorithm.
【作者单位】：华东交通大学电气与自动化工程学院;南昌铁路局;
【基金】：国家自然科学基金(51167006) 江西省工业科技支撑计划项目(20161BBE50057) 江西省自然科学基金(20161BAB206157) 江西省教育厅自然科学基金(GJJ160495)
【分类号】：TM464

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