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：2016
期号：INCETS
页码：41
出版社：S&S Publications
摘要：Photo Voltaic energy has replaced the fossil based fuels in many fields. An exodus drift from carbonic fuels to photo voltaic energy is observed. At its infant stages solar energy was comprised of isolated generating units. Rampant developments led to the emerging of grid tied systems. Protocols issued by authorities, technical and nontechnical constraints altogether possess severe threats to grid tied systems. Leakage current, harmonics, electromagnetic interference, dead time, reactive power compensation etc put the system in swirls of crisis. Ostensibly leakage current is the prime impediment for the grid connected systems. Rapid variation in common mode voltage and parasitic capacitance are the root causes for leakage current. Damage of PV array, harmonic distortion in grid, safety disasters, losses, false tripping of protective devices, malfunction of power conditioning system etc are major outrages caused by leakage current. The causes, magnitude, path, detrimentals, point of measurement and preventive measures of leakage current are analysed. Advanced power electronic circuits namely H5, HERIC and H6 topology of inverters can restrict leakage current to safe limits. A comparative analysis of these inverters are performed with regard to leakage current and overall efficiency. Theoretical arguments are substantiated by MATLAB simulations.H5 topology gave the best leakage current results.
