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Control of a Uniform Step Asymmetrical Multilevel Inverter using Particle Swarm Optimization

机译:基于粒子群算法的均步非对称多电平逆变器控制

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摘要

W artykule zaprezentowano strategię eliminacji harmonicznych HES w przekształtniku wielopoziomowym asymetrycznym USAMI. Wykorzystano metodę algorytmów rojowych i porównano tę metodę z klasyczną metoda PWM.%Harmonic Elimination Strategy (HES) has been a widely researched alternative to traditional PWM techniques. This paper presents the harmonic elimination strategy of a Uniform Step Asymmetrical Multilevel Inverter (USAMI) using Particle Swarm Optimization (PSO) which eliminates specified higher order harmonics while maintaining the required fundamental voltage. This method can be applied to USAMI with any number of levels. As an example, in this paper a seven-level USAMI is considered and the optimum switching angles are calculated to eliminate the fifth and seventh harmonics. The HES-PSO approach is compared to the well-known Sinusoidal Pulse-Width Modulation (SPWM) strategy. Simulation results demonstrate the better performances and technical advantages of the HES-PSO controller in feeding an asynchronous machine. Indeed, the harmonic distortions are efficiently cancelled providing thus an optimized control signal for the asynchronous machine. Moreover, the technique presented here substantially reduces the torque undulations.
机译:W artykule zaprezentowanostrategięeliminacji谐波z hes wprzekształtnikuwielopoziomowym asymetrycznym USAMI。谐波消除策略(HES)已被广泛研究,替代了传统的PWM技术。本文介绍了一种采用粒子群优化(PSO)的均步非对称多电平逆变器(USAMI)的谐波消除策略,该算法消除了指定的高阶谐波,同时保持了所需的基本电压。此方法可以应用于任意级别的USAMI。例如,在本文中考虑了七级USAMI,并计算了最佳开关角以消除五阶和七阶谐波。将HES-PSO方法与众所周知的正弦脉冲宽度调制(SPWM)策略进行了比较。仿真结果表明,HES-PSO控制器在为异步电机供电时具有更好的性能和技术优势。实际上,谐波失真被有效地消除了,从而为异步电机提供了优化的控制信号。此外,这里提出的技术大大减少了扭矩波动。

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