基于LMD能量熵和定位分析的风电变流器开路故障诊断

张瑞成; 白晓泽; 董砚; 邸志刚; 孙鹤旭; 张靖轩

doi:10.19912/j.0254-0096.tynxb.2022-0257

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (6) : 484-494. DOI: 10.19912/j.0254-0096.tynxb.2022-0257

基于LMD能量熵和定位分析的风电变流器开路故障诊断

张瑞成¹, 白晓泽¹, 董砚², 邸志刚¹, 孙鹤旭³, 张靖轩^1,4

作者信息 +

OPEN-CIRCUIT FAULT DIAGNOSIS OF WIND POWER CONVERTER BASED ON LMD ENERGY ENTROY AND LOCATION ANALYSIS

Zhang Ruicheng¹, Bai Xiaoze¹, Dong Yan², Di Zhigang¹, Sun Hexu³, Zhang Jingxuan^1,4

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文章历史 +

摘要

为提高风电变流器的故障诊断准确率,针对永磁同步风电机组网侧变流器IGBT模块的单一开路和双开路故障问题,提出一种基于局部均值分解（LMD）能量熵和定位分析的风电变流器开路故障诊断方法。首先,采集网侧变流器三相输出电流作为原始信号,利用LMD将其自适应分解为多层乘积函数（PF）分量,并求取各状态下PF分量的能量熵特征。然后,根据开路故障造成的三相电流时间序列的畸变特性进行定位分析。最后,将融合能量熵特征和定位参数的特征向量输入栈式稀疏自编码（SSAE）网络进行训练和故障识别。仿真与实验结果表明,融合能量熵特征和定位分析的特征提取方法使故障特征更为明显,相较于其他特征提取方法可有效提高风电变流器故障诊断准确率。

Abstract

To improve the accuracy of fault diagnosis of wind power converters, a novel method to diagnose the single and double IGBT modules open-circuit faults of the permanent magnet synchronous generator wind turbines grid-side converter, based on local mean decomposition （LMD） energy entropy and location analysis, is proposed. Primarily, the three-phase output current of the grid-side converter is collected as the original signal, which is adaptively decomposed into multi-layer product function （PF） components using LMD, and the energy entropy characteristics of the PF components in each state are obtained. Afterward, the location analysis is carried out according to the distortion characteristics of the three-phase current time series caused by the open-circuit fault. Finally, the feature vectors of the fused energy entropy features and location parameters are inputted into a stacked sparse auto encoder （SSAE） network for training and fault identification. The simulation and experimental results show that the feature extraction method fused energy entropy features and location analysis is more obvious to address fault features. Compared with other feature extraction methods, the proposed method can effectively improve the fault diagnosis accuracy of the wind power converter.

导出引用

张瑞成, 白晓泽, 董砚, 邸志刚, 孙鹤旭, 张靖轩. 基于LMD能量熵和定位分析的风电变流器开路故障诊断[J]. 太阳能学报. 2023, 44(6): 484-494 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0257

Zhang Ruicheng, Bai Xiaoze, Dong Yan, Di Zhigang, Sun Hexu, Zhang Jingxuan. OPEN-CIRCUIT FAULT DIAGNOSIS OF WIND POWER CONVERTER BASED ON LMD ENERGY ENTROY AND LOCATION ANALYSIS[J]. Acta Energiae Solaris Sinica. 2023, 44(6): 484-494 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0257

中图分类号： TM464

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