A SRF-PLL Control Scheme for DVR to Achieve Grid Synchronization and PQ Issues Mitigation in PV Fed Grid Connected System - Circuits and Systems

CS > Vol.7 No.10, August 2016

Volume 7, Issue 10 (August 2016)

ISSN Print: 2153-1285 ISSN Online: 2153-1293

Google-based Impact Factor: 0.48 Citations

A SRF-PLL Control Scheme for DVR to Achieve Grid Synchronization and PQ Issues Mitigation in PV Fed Grid Connected System ()

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DOI: 10.4236/cs.2016.710256 4,011 Downloads 7,228 Views Citations

Author(s)

Saritha Natesan, Jamuna Venkatesan

Affiliation(s)

Electrical and Electronics Engineering, Jerusalem College of Engineering, Chennai, India.

ABSTRACT

This paper presents the Synchronous Reference Frame Theory (SRF) based Phase Locked Loop (PLL) to enhance the performance of Dynamic Voltage Controller (DVR). In a grid connected power conversion system, a critical component is the Phase-Locked Loop (PLL) that generates the grid voltage’s frequency and phase angle for the grid synchronization. For grid voltage control, accurate and fast responding PLLs are required to provide phase angle and frequency measurements of the grid voltage. Therefore, SRF based PLL is presented in this work and it calculates the phase angle accurately and effectively. This paper also presents a novel feedback mechanism for SRF-PLL which uses the estimated frequency and phase to achieve grid control. The fundamental signal of the grid voltage is extracted by low pass filter and a unit value controller to generate a unity sine reference signal for the feedback network. In particular, the performance of the SRF-PLL in the three-phase PV fed grid connected system is analyzed under the different power quality issues such as voltage sag and swell. In addition, a detailed study on synchronous reference frame theory is presented. An appropriate control algorithm for DVR is developed and the validity of the proposed configuration is verified through MATLAB simulation results as well as experimental results under different operating conditions.

KEYWORDS

Photovoltaic (PV), Multi-Level Inverter, Total Harmonic Distortion (THD), Power Quality, dq Frame

Share and Cite:

Natesan, S. and Venkatesan, J. (2016) A SRF-PLL Control Scheme for DVR to Achieve Grid Synchronization and PQ Issues Mitigation in PV Fed Grid Connected System. Circuits and Systems, 7, 2996-3015. doi: 10.4236/cs.2016.710256.

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