Optimal parameter design of input filters for general purpose inverter based on genetic algorithm

Optimal parameter design of input filters for general purpose inverter based on genetic algorithm
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基于遗传算法的通用逆变器输入滤波器参数优化设计

DOI:
10.1016/j.amc.2008.05.017
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发表时间:
2008-11
期刊:
Appl. Math. Comput.
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输入滤波器的设计越来越受到人们的关注,因为在没有插入滤波器的情况下,逆变器在运行过程中产生的谐波和无功功率将注入电力系统。本文采用LC无源谐波滤波器,与有源电力谐波滤波器和PWM技术相比,具有成本效益和可靠性的优点。此外,为了便于高精度分析逆变器系统,本文提出了一种更实用的模型,适用于不同额定功率的所有通用逆变器,即包含主要谐波的等效电流源,与等效阻抗并联。最后,借助该等效系统和遗传算法的思想,本文提出了最佳滤波器参数,以最小化电流总谐波失真(THD)。更重要的是,仿真结果和工业应用证明了计算出的参数值是实用的。
Input filter design has attracted more and more attention in those conditions where harmonics and reactive power produced by the inverters will be injected into the power system during their operation when without any filter inserted. In this paper LC passive harmonic filters are employed with the advantages of cost-effective and reliability, compared with active power harmonic filters and PWM technique. Furthermore, for the facility to analyze inverter system with high accuracy, this paper proposes a more practical model suitable for all general purpose inverters at different power ratings, which is an equivalent current source containing major harmonics, paralleled with equivalent impedance. Finally, thanks to this equivalent system and the idea of genetic algorithm, this paper presents the optimum filter parameters to minimize current total harmonic distortion (THD). More importantly, those parameter values computed were proved to be practical by simulation results and industry applications.
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