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：2014
期号：ICIET
页码：587
出版社：S&S Publications
摘要：Distributed Generation (DG) System is a smallscale electric power generation which is based on wind energy,fuel cell, photo voltaic system, hydro etc. Grid Synchronizationis one of the most important issues in the control of invertersconnected to the grid. The proper operation of grid connectedinverter system is determined by grid voltage conditions such asphase, amplitude and frequency. A discrete phase-locked loop(PLL) is used to track the phase angle in order to improve thesynchronization systems response in adverse grid conditions.Using the enhanced synchronization structure the fundamentalpositive-sequence component of grid voltages in asymmetric anddistorted three-phase systems is estimated. The α-β stationaryframe is used to obtain the pulsation for grid inverter using aspace vector pulse width modulation (SVPWM). Theperformance of the proposed structure is verified throughsimulations using a grid set of ideal and non-ideal grid conditions(three-phase voltage unbalance, variation in frequency, variationin amplitude and phase shift).The simulation results demonstratesthat the proposed method is very effective in digital structuresynchronization .
