A Novel Grid Synchronization System under Adverse Grid Conditions
Journal Title: International Journal of Research in Computer and Communication Technology - Year 2014, Vol 3, Issue 8
Abstract
Grid synchronization algorithms are of great importance in the control of grid-connected power converters, as fast and accurate detection of the grid voltage parameters is crucial in order to implement stable control strategies under generic grid conditions. This paper presents a new grid synchronization method for three-phase three-wire networks, namely dual second-order generalized integrator (SOGI) frequency-locked loop. The method is based on two adaptive filters, implemented by using a SOGI on the stationary αβ reference frame, and it is able to perform an excellent estimation of the instantaneous symmetrical components of the grid voltage under unbalanced and distorted grid conditions. This paper analyses the performance of the proposed synchronization method including different design issues. Moreover, the behaviour of the method for synchronizing with highly unbalanced grid is proven by means of simulation demonstrating its excellent performance.
Authors and Affiliations
L. Kranthi Kumar, S. Vishwanath, M. Nagaraju
Keywords
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