摘要
为了提高双闭环PI控制器的性能,以降低三相逆变系统输出电压的THD值,本文提出了一种新颖的基于差分进化的三相逆变系统双闭环PI控制器参数优化设计方法。该方法的基本思路为将三相逆变系统的双闭环PI控制参数优化设计问题转换成一个典型的有约束优化问题,而后将三相逆变输出电压的THD和时间乘误差绝对值积分设计为优化目标函数,利用所设计的差分进化算法获得双闭环PI控制器最优参数,最后在一台功率为6kW三相逆变实验系统进行了仿真测试实验和硬件平台测试实验。实验结果证明,相对于采用Z-N经验法、遗传算法、粒子群算法的系统,本文所设计的基于DE的三相逆变系统不管是在稳态还是负载突变的情况工作性能最优,系统输出电压谐波含量最低。
In order to improve the effective and efficient of double closed-loop PI controller and reduce the total harmonic distortion(THD)of output voltage waveform,this paper presents a novel double closed-loop PI controller design method for a three-phase inverter based on the differential evolution(DE)algorithm.The basic idea behind the proposed method is firstly formulating the design problem of double close-loop PI controller for a three-phase inverter as a typical constrained optimization problem,where the THD and the integral of time weighted absolute error of output voltage waveform are weighed as the optimization objective function.After that,a DE algorithm is designed to solve this formulated problem.At last,the superiority of the proposed method to Z-N empirical method,genetic algorithm,particle swarm optimization is demonstrated by simulation and experimental results on a 6kW three-phase inverter including nominal condition and variable loads conditions.
作者
王环
戴瑜兴
Huan Wang;Yu-Xing Dai(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China;College of Mathematics Physics and Electronic Information Engineering,Wenzhou University,Wenzhou 325035,China)
关键词
三相逆变系统
差分进化
双闭环系统
Three-phase Inverter
Differential Evolution
Double Closed-loop Controller
