并网逆变器LCL滤波器的参数优化设计

LCL型滤波器因具有更优的高频谐波衰减性和滤波效果被广泛应用于并网逆变器中,但其参数设计较为复杂。提出了一种新的LCL型滤波器参数优化设计方案,建立以纹波电流最小化、谐波衰减最大化和功率损耗最小化的多个目标优化设计模型。运用熵值权重法转换为单目标优化模型并利用遗传算法对优化模型求解。在MATLAB/Simulink中搭建基于LCL滤波器的并网逆变器仿真模型,验证了该优化方案的适用性。与现有方法相比,文中的优化方法在保证滤波效果的前提下,具有更好的谐波衰减性能,抑制纹波的能力及更小的功率损耗。

Parameter Optimization Design of Grid-connected Inverter LCL Filter

LCL filters are widely used in grid-connected devices because of their superior high-frequency harmonic attenuation and filtering effects, but their parameter design is more complicated. An new LCL filter parameter optimization design scheme was proposed based on genetic algorithm in this paper and a multi-objective optimization design model which have minimizes ripple current, maximizes harmonic attenuation, and minimizes power loss was established.Using entropy weighting method to convert to single objective optimization model and using genetic algorithm to solve optimization model in this paper. Meanwhile, the Grid-connected inverter based on LCL filter simulation model was built in Matlab/Simulink and the simulation results verified the applicability of the design. Compared with the existing methods, the optimization scheme has better harmonic attenuation performance, the ability to suppress ripple and less power loss while ensuring the filtering performance.