改进蛇算法的七电平逆变器SHEPWM研究  

Research on SHEPWM of Seven Level Inverter Based on Improved Snake Algorithm

作　　者：付光杰[1] 李鑫 FU Guangjie;LI Xin(School of Electrical and Information Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学电气信息工程学院,大庆163318

出　　处：《微特电机》2024年第6期49-54,61,共7页Small & Special Electrical Machines

基　　金：海南省重点研发项目(ZDYF2022GXJS003)。

摘　　要：多电平逆变器控制策略中的特定谐波消除脉宽调制(SHEPWM)能够以较低的开关频率得到较好的电压输出波形,重点在于开关角的求取。在多电平逆变器SHEPWM调制的开关角求解算法上提出改进蛇优化算法,对传统蛇优化算法采用Tend混沌映射初始种群,使初始种群分布更加均匀;引入Levy飞行策略增强算法的全局搜素能力,能够更加精准快速得到全局开关角的最优解。仿真结果表明,改进蛇优化算法所求的开关角相较于传统算法更好地消除低次谐波,并降低了输出线电压的畸变率,充分验证了该方法的可行性。The specific harmonic elimination pulse width modulation(SHEPWM)in the control strategy of multi-level inverters can obtain better voltage output waveforms at lower switching frequencies,with a focus on obtaining the switching angle.An improved snake optimization algorithm was proposed for solving the switching angle of multi-level inverter SHEPWM modulation.Tend chaotic mapping was used for the initial population of the traditional snake optimization algorithm to make the initial population distribution more uniform.The Levy flight strategy was introduced to enhance the global search ability of the algorithm,which could more accurately and quickly obtain the optimal solution of the global switch angle.Simulation results show that the improved snake optimization algorithm can better eliminate low order harmonics and reduce the distortion rate of the output line voltage compared to traditional algorithms,fully verifying the feasibility of the method.

关 键 词：特定谐波消除脉宽调制 七电平逆变器 蛇优化算法 开关角求解 

分 类 号：TM464[电气工程—电器]