为了有效准确地对气体绝缘金属封闭开关GIS(gas insulated switchgear)进行局部放电在线监测,针对当前主流监测设备存在着兼容性差、数据实时处理能力弱等不足,设计了一套多通信接口的GIS局部放电在线监测系统.结合双树复小波变换良好的去噪能力和提升小波变换高效的计算能力,在软件系统数据处理模块中引入提升双树复小波算法,对监测所得的数据进行去噪处理,并显示相应局放图谱,最后基于统计特征参数法对处理后的数据进行局放特征参数计算.仿真和实验结果表明,该系统人机界面友好,具有良好的数据处理和特征参数计算能力,所测得的结果直观准确,较之其他在线监测系统,更能满足GIS局部放电在线监测的实时性要求,在工程实践中具有更高的应用价值.%In order to monitor the partial discharge in gas insulated switchgear (GIS) more efficiently and accurately,a set of online monitoring system for GIS partial discharge with multiple communication interfaces is designed,which can improve the poor compatibility and weak real-time data processing ability in the current mainstream devices.Considering the denoising ability of dual-tree complex wavelet transform and the computational ability of lifting wavelet transform,a lifting dual-tree complex wavelet transform is put forward as the core of data processing module to denoise the monitoring data,and partial discharge oscillograms are shown in the user interface.The partial discharge characteristic parameters of the de-noised data are calculated based on the statistical characteristic parameters.The results of simulation and experiment show that this system has friendly man-machine interface,stronger data processing and characteristic parameter calculation ability.Compared with other online monitoring systems,its measurement result is direct and accurate,which can meet the real-time requirements in the online monitoring of GIS partial discharge.It also has higher application value to the engineering practice.
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