Research on the New Power Quality Online Monitoring and Analysis System Design Based on the LABview

Abstract

Power Quality Improvement premise is to obtain accurate power quality real-time information. In order to achieve the targets more accurate real-time monitoring of power quality, paper LabVIEW graphical software platform for the development, design real-time power quality monitoring and analysis system, using generalized S transform and combining tree classification rules implemented method of transient power quality disturbance signal time targeting and automatic identification. The system includes a parameter setting, data acquisition and analysis, recorder storage and data transfer 4 function modules with real-time monitoring and recording various indicators steady power quality disturbances transient analysis time of occurrence and recognition. Programmable three-phase AC power by the power quality analog signal, the system measurement function experiments and the results showed that: RMS voltage error is less than 05% and a frequency error is less than 0 01 Hz, each harmonic voltage error. There are less than 5%, and transient voltage oscillation disturbance detection interrupt signal value exist errors, but errors are within 1ms and the validity and effectiveness of the system. The system can function fully meet the application requirements of power quality monitoring and analysis, can provide the necessary data to support the development of improved power quality and power quality management related measures, with good practical significance.