Development Of Equipment To Inspect And Analyze Electric Variables

An equipment is developed to measure and analyze electric variables aiming at the problem of power quality. It provides the user with a tool to analyze power quality generally. The whole system is composed of the design of both hardware and software.The hardware consists of transformer, adjusting module, A/D and PC for industry, primarily of the DAS-1801ST card from Keithley company and PC for industry.The design of software is composed of the development of Virtual Panel Interface and the research of algorithm of measuring electric variable. The most popular VC++6.0 is used here to complete the development of the former which concludes the dynamic display of input wave-form, real-time displaying RMS, Power and Power Factor, harmonic analysis and measuring the voltage fluctuation and flicker. The measurement of electric variables is mostly based on GB while that of voltage fluctuation and flicker on the relevant IEC standard.The general design, software algorithm and the whole process are discussed in detail based on the introduction of hardware and software.. Furthermore, several instance tests are carried through to diminish the error based on analyzing and comparing different algorithm.