期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2018
卷号：7
期号：3
页码：3029
DOI：10.15680/IJIRSET.2018.0703043
出版社：S&S Publications
摘要：Power factor losses represent a significant factor of power losses in both industrial and domestic units.Various methods have been adopted to tackle this problem as low power factor is the big issue for any industry. Thereason is that if the power factor is low the losses will increase due to which the efficiency of equipment in industrygets low down. Hence due to this the electrical supply company charge penalty due to low power factor according totheir norms. This paper aims to present an indigenous technique and method which could be used for static powerfactor correction. It is discussed in this work that phase difference between voltage and current can be determined usingzero crossing detectors, opto-couplers, EXOR gate and some basic function of AT89C52 microcontroller. APFC devicereads power factor from line voltage and line current by determining the delay in the arrival of the current signal withrespect to voltage signal from the function generator with high accuracy by using an internal timer. This time values arethe calibrated as phase angle and corresponding power factor. Then the values are displayed in Liquid crystal displaymodules. Then the motherboard calculates the compensation requirement and accordingly switches on differentcapacitor banks. Voltage and current transformers have been used for transforming load voltage and currentrespectively to bring them in desired working range of microcontroller.
关键词：Active power; Reactive power; Power factor; AT89C52 micro controller; Penalty; Capacitor banks;Current transformer; Voltage or potential transformer.
