Development And Advanced Applications Of Power Quality On-line Monitoring System Of Guangzhou

With the rapid development of economy, the rapid growth of the power load，anonlinear load proportion in the whole grid system is constantly climbing, the resulting gridpower quality problems such as voltage and current waveform distortion and then spread,the security and stability of the system is to take their toll. Guangzhou power supply bureausince2008, the power quality monitoring has accumulated a large amount of data base..Based on the power quality online monitoring present situation in guangzhou, developed acomprehensive power quality analysis software，and to establish a general data sharingplatform based on IEC61970by normative power quality comprehensive data storageformat, implements the power quality monitoring system and guangzhou electric powerdispatching quasi real-time platform, many manufacturers monitoring system of dataassociation and the exchange, has realized many advanced application functions such as thecomprehensive analysis, graphical display, abnormal alarm, automatic report and so on,with strong comprehensive functions, and sharing, high extensibility, etc. And the system isused to analyze the several typical grid power quality events and puts forward somecountermeasures, and analyze the special nature of power quality in-depth. the differencesbetween high and low voltage power quality problems were proposed. Finally, this papersummarized the high voltage and power grid power quality problems and differences in lowvoltage distribution network, and the research of high voltage and power grid power qualityproblems, ensure the safe operation of power grid and the user’s electricity quality. haveexpected the research trends in the future. To improve the level of southern power gridpower quality and technical supervision provides important technical support, has the veryhigh application value in the practical production.