基于LabVIEW的分布式逆变器电能质量监测系统

Power Quality Monitoring System of the Distributed Inverter Based on LabVIEW

为了实现对多台逆变器电能质量的实时监测,设计了基于LabVIEW的分布式逆变器电能质量监测系统。该系统应用了虚拟仪器技术和以太网通讯技术,以现场子系统驱动数据采集卡,实时地采集逆变器电能信号,并通过UDP通讯协议将采集到的数据发送到指定站点的远程监测子系统中。站点系统利用接受到的数据进行电能信号频率、功率、三相不平衡度和各次谐波分量等电能质量指标的分析,并建立数据库对采集到的电能信号数据和指标计算结果进行存储,分类和共享,为进一步的电能质量分析奠定了基础。

A power quality monitoring system of the distributed inverter based on LabVIEW was designed to monitor the power quality of multiple inverters in real time. which applied the virtual instrument and Ethernet communication technology. And combined with the data acquisition card of the field subsystem, this system was able to acquire the inverter power signals in realtime and send these signals to the certain remote monitoring subsystem by the Ethernet communication protocol UDP. Based on the data received, the remote subsystem analyzed the power quality indexes such as the signal frequency, power, three-phase unbalance factor and harmonic content. The received data of the power signals and calculation resultswould be stored, classified and shared through the database, which could lay a solid foundation for the further analysis of power quality.