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Electronics 2018, 7(4), 51; https://doi.org/10.3390/electronics7040051

Photovoltaic-STATCOM with Low Voltage Ride through Strategy and Power Quality Enhancement in a Grid Integrated Wind-PV System

School of Electrical Engineering, VIT University, Vellore-632014, India
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Received: 5 March 2018 / Revised: 7 April 2018 / Accepted: 7 April 2018 / Published: 12 April 2018
(This article belongs to the Special Issue Grid Connected Photovoltaic Systems)
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Abstract

The traditional configurations of power systems are changing due to the greater penetration of renewable energy sources (solar and wind), resulting in reliability issues. At present, the most severe power quality problems in distribution systems are current harmonics, reactive power demands, and the islanding of renewables caused by severe voltage variations (voltage sag and swell). Current harmonics and voltage sag strongly affect the performance of renewable-based power systems. Various conventional methods (passive filters, capacitor bank, and UPS) are not able to mitigate harmonics and voltage sag completely. Based on several studies, custom power devices can mitigate harmonics completely and slightly mitigate voltage sags with reactive power supplies. To ensure the generating units remain grid-connected during voltage sags and to improve system operation during abnormal conditions, efficient and reliable utilization of PV solar farm inverter as STATCOMs is needed. This paper elaborates the dynamic performance of a VSC-based PV-STATCOM for power quality enhancement in a grid integrated system and low voltage ride through (LVRT) capability. LVRT requirements suggest that the injection of real and reactive power supports grid voltage during abnormal grid conditions. The proposed strategy was demonstrated with MATLAB simulations. View Full-Text
Keywords: wind energy; PV solar farm; PV-STATCOM; reactive power (Q) support; harmonics; voltage sag; power quality improvement; low voltage ride through (LVRT) wind energy; PV solar farm; PV-STATCOM; reactive power (Q) support; harmonics; voltage sag; power quality improvement; low voltage ride through (LVRT)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Popavath, L.N.; Kaliannan, P. Photovoltaic-STATCOM with Low Voltage Ride through Strategy and Power Quality Enhancement in a Grid Integrated Wind-PV System. Electronics 2018, 7, 51.

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