NDLI: Adaptive EPLL for improving power quality in three-phase three-wire grid-connected photovoltaic system

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Adaptive EPLL for improving power quality in three-phase three-wire grid-connected photovoltaic system

Content Provider	IET Digital Library
Author	Chittora, Prakash Singh, Alka Singh, Madhusudan
Abstract	A phase-locked loop (PLL) plays an integral part in synchronisation circuits and is immensely used in grid-connected systems, active filters, and uninterrupted power supplies. A number of these circuits based on synchronous reference frame and its modifications, second-order generalised integrator, enhanced PLL (EPLL) have recently been reported in literature. This article proposes an adaptive version of EPLL whose gain adjusts automatically with the variation of error. Adaptive EPLL (A-EPLL) is developed for positive sequence extraction of load current and its performance is tested for active filter operation. A PV system is also connected at the DC link of the shunt active power filter (SAPF) and the developed controller is tested under dynamic load changes. The complete control technique is tested for harmonics reduction, load balancing, and power balance between grid, load, and photovoltaic (PV) source. Detailed experimental results showing a new adaptive PLL for load compensation are illustrated here.
Starting Page	1595
Ending Page	1602
Page Count	8
ISSN	17521416
Volume Number	13
e-ISSN	17521424
Issue Number	Issue 9, Jul (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/13/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2018.5261
Journal	IET Renewable Power Generation
Publisher Date	2019-03-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	A-EPLL Active Filter Active Filter Operation Adaptive EPLL Adaptive PLL Adaptive Version Control of Electric Power System Demodulator Developed Controller Discriminators And Mixers Dynamic Load Changes Enhanced PLL Grid-connected System Harmonics Integral Part Load Balancing Load Current Modulator Other Power Apparatus And Electric Machine Phase Locked Loop Photovoltaic Power System Photovoltaic Source Positive Sequence Extraction Power Balance Power Converter Power Filter Power Grid Power Harmonic Filter Power Quality Power Supplies to Apparatus Power Supply Quality Power System Control PV System Second-order Generalised Integrator Shunt Active Power Filter Solar Power Stations Synchronisation Synchronisation Circuit Synchronous Reference Frame Three-phase Three-wire Grid Uninterrupted Power Supplies Uninterruptible Power Supplies
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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