变频器驱动双电机谐波状态估计方法  

Harmonic State Estimation Method of Dual-motor Driven by Frequency Converter

作　　者：蒋芳华[1] JIANG Fanghua(Xiangtan Iron&Steel Co.,Ltd.of Hunan Valin,Xiangtan 411101,China)

机构地区：[1]湖南华菱湘潭钢铁有限公司,湖南湘潭411101

出　　处：《电工技术》2022年第7期123-126,共4页Electric Engineering

摘　　要：变频器中的驱动双电机在接入电网时往往会出现谐波状态改变,造成谐波污染,产生电能问题。传统的基于最小二乘法的谐波状态估计方法的耦合关系提取困难,量测方程不稳定,因此改进了生成对抗网络,设计了新的变频器驱动双电机谐波估计方法。首先配置了变频器驱动双电机谐波量测点,根据该量测点,设计了双电机谐波状态估计网络结构,进行了网络选择和数据预处理。最后构建了谐波状态估计网络对抗模型,实现了谐波状态估计。实验结果表明,此次设计方法的真实值曲线与预估值曲线拟合度高,具有准确性,有一定的应用价值。When the driving double motor in the frequency converter is connected to the power grid,the harmonic state often changes,resulting in harmonic pollution and electric energy problems.The traditional harmonic state estimation method based on the least squares method is difficult to extract the coupling relationship and the measurement equation is unstable.Therefore,the generation countermeasure network is improved and a novel harmonic estimation method of dual motor driven by frequency converter is designed.Firstly,the harmonic measurement point of the dual-motor driven by the frequency converter is configured.Then,according to the measurement point,the network structure of harmonic state estimation of double motors is designed,and the network selection and data preprocessing are carried out.Finally,the harmonic state estimation network countermeasure model is constructed to realize the harmonic state estimation.The experimental results show that the design method is accuracy and has high fitting degree between the real value curve and the predicted value curve,and has certain application value.

关 键 词：变频器 驱动 双电机 谐波状态 估计 

分 类 号：TM76[电气工程—电力系统及自动化]