基于LabWindows/CVI的电能质量监测系统设计

Design of Power Quality Monitoring System Based on LabWindows/CVI

为了解决传统电能质量监测装置监测通道少、测量精度不高、功能协同性不强等问题,通过研究电能质量各项指标的测量技术,研发了一种基于LabWindows/CVI虚拟仪器开发平台的一体化电能质量监测系统。该监测系统采用自适应电网频率的数据采集方法和基于脉冲触发的同步方法实现了多通道同步高精度的测量,同时多线程交互式的编程模式实现了多功能之间的良好协调。通过检测表明,该系统能够稳定地检测分析电能质量稳态指标和暂态扰动,操作简单,功能丰富,界面友好,具有广泛的使用前景。

In order to solve these problems that power quality monitoring device monitoring channel is less, measurement accuracy is not high, functional interoperability is not strong, etc., an integrated power quality monitoring system based on LabWindows/CVI is developed by studying the measurement technology of indica- tors of power quality. The monitoring system uses the adaptive grid frequency data acquisition method and syn- chronization method based on pulse triggers to realize a muhichannel synchronous high precision measurement. At the same time, the multithread interactive programming model has realized the good coordination among va- rious functions. Test results show that the system can detect and analyze the steady-state indexes of power quality and the transient disturbance signal. There are some advantages such as simple operations, feature-rich, friendly interface, and so on, which makes the system have an extensive application prospect.