基于改进型粒子群优化算法的非对称级联开关电容多电平逆变器  

Asymmetric Cascaded Switched Capacitor Multi-level Inverter Based on Improved Particle Swarm Optimization Algorithm

作　　者：张枫鑫 叶远茂 ZHANG Fengxin;YE Yuanmao(School of Automation,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学自动化学院,广州510006

出　　处：《电源学报》2024年第6期51-59,共9页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51907033)。

摘　　要：针对粒子群优化PSO(particle swarm optimization)算法在应用到逆变器的特定谐波、消除脉宽调制SHEPWM(vselective harmonic elimination pulse-width modulation)所存在的全局搜索能力差、且容易陷入局部最优等问题,提出1种改进型PSO。通过在搜索过程中引入遗传算法中的垂直交叉运算,以及采用精英保留策略来提高算法的全局搜索能力、局部搜索能力和保留优秀的个体,由此提高开关角精确度,改善SHEPWM的性能。使用所提算法对新型非对称级联开关电容多电平逆变器的SHEPWM非线性超越方程进行求解,解决了传统数值法对初值依赖性高及传统PSO求解开关角精确度低等问题。仿真及实验结果验证了所提拓扑结构的可行性和所提算法应用到SHEPWM中的有效性。Aimed at the problem that the particle swarm optimization(PSO)algorithm has a poor global search capability and is easy to fall into local optimum when it is applied to the selective harmonic elimination pulse width modulation(SHEPWM)of an inverter,an improved PSO algorithm is proposed.The vertical crossover operation of genetic algorithm is introduced to the search process,and the elite retention strategy is used to improve the global and local search capabilities of the algorithm and retain excellent individuals,thereby increasing the accuracy of switching angle and improving the performance of SHEPWM.This algorithm is used to solve the SHEPWM nonlinear transcendental equation of a novel asymmetric cascaded switched capacitor multi-level inverter,which overcomes problems such as the high dependence of traditional numerical methods on initial value and the low accuracy of the traditional PSO algorithm in solving the switching angle.Finally,the feasibility of the proposed topology and the effectiveness of the proposed algorithm applied to SHEPWM were verified by simulation and experimental results.

关 键 词：开关电容 多电平逆变器 非对称级联 特定谐波消除脉宽调制 改进型粒子群优化算法 

分 类 号：TM464[电气工程—电器]