LC型光伏逆变器无模型预测谐波优化控制  

Model-free Predictive Harmonic Optimal Control for LC-type Photovoltaic Inverters

作　　者：林奕夫 陈雪 何锋 王健 LIN Yi-fu;CHEN Xue;HE Feng;WANG Jian(State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350011,China;不详)

机构地区：[1]国网福建省电力有限公司,福建福州350011 [2]国网福建省电力有限公司经济技术研究院,福建福州350011

出　　处：《电力电子技术》2025年第1期55-58,共4页Power Electronics

基　　金：国网福建电力科技项目(52130N23001H)。

摘　　要：针对LC型光伏逆变器传统无模型预测控制输出电压谐波大的问题,本文提出了一种基于调制的无模型预测谐波优化控制(MFPHOC)方法。首先,介绍了传统有限集无模型预测控制的原理并分析了谐波特征。然后,利用逆变器基本矢量合成虚拟矢量,并基于电压差分计算每个虚拟矢量的作用时间。进而,在虚拟矢量的影响下,分析虚拟矢量差分信息与基本矢量差分信息的关系,实现差分信息实时更新。所提方法通过矢量合成降低了输出电压谐波,并通过差分信息更新进一步改善了输出电压性能。最后,通过实验验证了所提方法优化输出电压谐波的有效性。Aiming at the problem of high harmonics in the output voltage of LC-type photovoltaic inverters,a model-free predictive harmonic optimal control(MFPHOC)based on modulation is proposed.Firstly,the principle of traditional finite set model-free predictive control is introduced,and the harmonic characteristics are analyzed.Then,the basic vector of inverter is used to synthesize virtual vector,and the operation time of each virtual vector is calculated based on voltage difference.Then,under the influence of virtual vector,the relationship between virtual vector difference in-formation and basic vector difference information is analyzed,and the difference information is updated in real time.The proposed method reduces the output voltage harmonics by vector synthesis,and further improves the output volt-age performance by updating the difference information.Finally,the effectiveness of the proposed method for optimizing output voltage harmonics is verified by experiments.

关 键 词：光伏逆变器 无模型预测控制 谐波优化 

分 类 号：TM464[电气工程—电器]