The Design of LabVIEW- based Power Quality Real- time Monitoring
and Analysis System
Author information+
(1 College of Mechanical and Electronical Engineering, Shihezi University, Shihezi, Xinjiang 832000,
2 Yantai Information Engineering School, Laizhou, Shandong 261400)
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Received
Published
2014-10-12
2015-06-01
Issue Date
2024-03-04
摘要
改善电能质量的前提是获得电能质量准确的实时信息。为了实现更准确地实时监测电能质量各项指标，本文
以 LabVIEW 图形化软件为开发平台，设计了电能质量实时监测与分析系统，采用广义 S 变换和分类规则树相结合
的方法实现暂态电能质量扰动信号时间定位和自动识别。该系统主要包括参数设置、数据采集与分析、录波存储和
数据传输 4 个功能模块，具有实时监测稳态电能质量的各项指标和记录暂态扰动的发生时刻和分析识别功能。通
过三相可编程交流电源模拟各项电能质量信号，对该系统测量功能进行实验验证，结果表明：电压有效值误差小于
0.5%，频率误差小于 0.01 Hz，各次谐波电压误差小于 5%，电压中断和暂态振荡扰动信号的检测值存在误差，但误
差都在 1 ms 之内，验证了该系统的正确性和有效性。该系统在功能上能完全满足电能质量监测分析的应用要求，
可为改善电能质量和制定有关电能质量治理措施提供必要的数据支持，具有良好的实际应用意义。
Abstract
How to acquire accurate real- time power quality information is the premise for improving the power quality. In order
to achieve the real- time monitoring of power quality indicators accurately, a real- time monitoring and analysis system of power
quality is designed based on the LabVIEW graphic software. Generalize S- Transform and classification rule tree are applied to
implement the time positioning and automatic identification of transient power disturbance of power quality. Four kinds of
function modules of this system are the focus of the design, including parameter setting, data collection and analysis, wave
record and storage, data transmission. The proposed monitoring system can real- time monitor the steady state of power quality,
and record the time of the transient disturbance, analysis and recognition. The three phases programmable AC power source is
applied to simulate power quality signals, and verificate the measurement function of the system. It can be shown from the
result that the voltage RMS error is less than 0.5%, the frequency error is less than 0.01 Hz, the every harmonic voltage error
is less than 5%, the voltage interruption and transient oscillation disturbance signal values exist error, but the error is within 1
ms. The proposed system can completely satisfy the application requirements of the power quality monitoring and analysis, and
provides the necessary data support for improving the power quality, also formulate relevant management measures of power
quality. Thus, it has a actual and good application.
LI Yaping , MENG Hewei , JIA Lili , ZHANG Xiaohai.
The Design of LabVIEW- based Power Quality Real- time Monitoring
and Analysis System. Journal of Shihezi University. 2015, 33(3): 378-384 https://doi.org/10.13880/j.cnki.65- 1174/n.2015.03.022
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