基于LabVIEW的智能变电站便携式电能质量监测装置

目前适用于IEC 61850标准的电能质量监测装置多为在线式，不具备便携式监测功能，无法实现对电能质量的第三方监测，且成本高、功能拓展性差。针对这种情况，设计了一种基于虚拟仪器--LabVIEW的智能变电站便携式电能质量监测装置。该装置通过LabVIEW进行设计，接入过程层交换机获取SV报文，利用PC机的高性能硬件平台进行数据处理。SV报文采集和解析模块对SV报文进行捕获和解析；数据计算和显示模块对电能质量指标进行计算和显示；数据分析模块对各稳态指标进行波形、趋势分析，对暂态问题进行小波分析，并能够将历史数据以PQDIF文件进行存储和共享。通过与现场应用的电能质量监测系统的测量数据进行对比，证明本装置具有较高的监测精度，可有效应用于智能变电站的电能质量监测。

A LabVIEW Based Portable Power Quality Monitoring Device for Smart Substation

At present, most of the power quality monitoring devices for IEC 61850 standard are on-line based and without portable monitoring functions, therefore unable to support third-party power quality monitoring. They are high in cost and lack of functional expandability. A portable power quality monitoring device for intelligent substation based on virtual instrument-LabVIEW is designed. Based on LabVIEW design, the power quality monitoring device connects to the process layer of the switches to capture SV messages, and uses high-performance PC hardware platform for data processing. The SV message collecting and parsing module conducts SV packet capture and analysis. The data calculation and display module calculates and displays power quality indicators. The data analysis module performs the waveform and trend analysis for various steady-state indicators, and wavelet analysis for transient power quality problems. The PQDIF file can be generated in accordance with IEEE standard format. A comparison of data from the devise and the data from the power quality monitoring system in the field operation demonstrates that the device has high monitoring precision and can be applied to intelligent substation for power quality monitoring.