Time-Domain Simulations of Single-Phase Enhanced PLL for Power Converters under Distorted Grid Conditions
K.K. Deepika1, J. Vijaya Kumar2, G. Kesava Rao3 

1K.K. Deepika, Assistant Professor, Vignan‟s Institute of Information Technology, Visakhapatnam, Andhra Pradesh. Research Scholar, KLEF, Vijayawada.
2J. Vijaya Kumar, Assoc. Professor, Dept. of EEE, ANITS, Visakhapatnam, Andhra Pradesh.
3G.Kesava Rao, Professor, Dept. of EEE, KLEF, Vaddeswaram, Andhra Pradesh.

Manuscript received on 08 March 2019 | Revised Manuscript received on 15 March 2019 | Manuscript published on 30 July 2019 | PP: 3053-3057 | Volume-8 Issue-2, July 2019 | Retrieval Number: B3074078219/19©BEIESP | DOI: 10.35940/ijrteB3074.078219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: With the developing number of alternate energy sources being connected to the Grid, there is a need for robust Grid synchronization technique that is capable enough despite the grid frequency and phase variations. Single phase Enhanced Phase Locked Loop (EPLL) presented in this paper meets these requirements. A detailed study of the performance of EPLL for disturbances in input grid voltage magnitude, phase and frequency is detailed through mathematical equations. Extensive simulations are carried out in Matlab/Simulink to analyze the phase and frequency tracking by EPLL. Dynamic response is examined carefully in terms of estimation of grid voltage, frequency and phase error.
Index Terms: Phase Locked Loop, Frequency Jump, Phase Jump.

Scope of the Article: Software Domain Modelling and Analysis