摘要
一套完整的电能质量监测装置要求能够同时对各种稳态和暂态电能质量信号进行实时监测和分析,而现有的监测装置仅有少数具有暂态监测和分析功能,且只涉及到电压暂降、电压暂升和短时电压中断这3种扰动信号。为了对目前各种常见暂态电能质量扰动信号进行实时监测和分析,提出了一种以移动离散小波变换算法为核心,虚拟仪器为平台的设计方案,所设计出的系统可以根据用户的需要实现在线和离线分析,能够实时地检测到常见暂态电能质量扰动信号的多个参数指标,同时能够对扰动信号进行准确而又快速的分类。最后,通过实验验证了该系统的实用性和可靠性。
A set of integrated power quality monitoring equipment needs real-time monitor and analyze both steady and transient power quality signals,however,only a little of existing monitoring equipment has the real-time transient monitoring and analyzing function,involving just three disturbance signals：voltage sag,voltage swell and momentary voltage interruption.In order to monitor and analyze all kinds of common transient power quality disturbance signals,a design proposal based on the running discrete wavelet transform and virtual instrument is proposed.The system can achieve on-line and off-line analysis depending on the user＇s requirement,with the function of detecting multiple index of the transient disturbance signals accurately,and classifying them automatically with high accuracy and speed.Finally,experiment results demonstrate the good practicability and reliability of the system.
出处
《电子测量技术》
2011年第1期109-114,共6页
Electronic Measurement Technology
关键词
电能质量
暂态扰动
移动小波变换
虚拟仪器
实时监测
power quality
transient disturbances
running wavelet transform
virtual instrument
real-time monitoring
