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Improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions

When a photovoltaic (PV) system is exposed to physical objects and cloud coverage and connected to bypass diodes, a partial shading condition (PSC) occurs, which causes a global maximum power point (GMPP) and numerous local maximum power points (LMPPs) on the power-voltage (P-V) curve. Unlike conven...

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Main Authors: Islam, Haidar, Mekhilef, Saad, Shah, Noraisyah Mohamed, Soon, Tey Kok, Wahyudie, Addy, Ahmed, Mahrous
Format: Article
Published: MDPI 2021
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.um.edu.my/28348/
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spelling my.um.eprints.283482022-07-18T01:26:49Z http://eprints.um.edu.my/28348/ Improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions Islam, Haidar Mekhilef, Saad Shah, Noraisyah Mohamed Soon, Tey Kok Wahyudie, Addy Ahmed, Mahrous TK Electrical engineering. Electronics Nuclear engineering When a photovoltaic (PV) system is exposed to physical objects and cloud coverage and connected to bypass diodes, a partial shading condition (PSC) occurs, which causes a global maximum power point (GMPP) and numerous local maximum power points (LMPPs) on the power-voltage (P-V) curve. Unlike conventional MPPT techniques that search for multiple LMPPs on the P-V curve, it is possible to track GMPP straightaway by designing a simple but robust MPPT technique that results in faster tracking speed and low power oscillations. Hence, in this study, an improved proportional-integral (PI) coordinated Maximum Power Point Tracking (MPPT) algorithm is designed to enhance the conversion efficiency of a PV system under PSC with fast-tracking speed and reduced power oscillations. Here, PI controllers are used to mitigating the steady-state errors of output voltage and current of PV system that later on passed through an incremental conductance (INC) algorithm to regulate the duty cycle of a dc-dc boost converter in order to ensure fast MPPT process. The PV system is integrated with the grid through an H-bridge inverter, which is controlled by a synchronous reference frame (SRF) controller. Tracking speed and steady-state oscillations of the proposed MPPT are evaluated in the MATLAB/Simulink environment and validated via a laboratory experimental setup using Agilent solar simulator and dSPACE (DS1104) controller. Results show that the proposed MPPT technique reduces the power fluctuations of PV array significantly and the tracking speed of the proposed method is 13% and 11% faster than the conventional INC and perturb and observe (P&O) methods respectively under PSCs. MDPI 2021-01 Article PeerReviewed Islam, Haidar and Mekhilef, Saad and Shah, Noraisyah Mohamed and Soon, Tey Kok and Wahyudie, Addy and Ahmed, Mahrous (2021) Improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions. Sustainability, 13 (2). ISSN 2071-1050, DOI https://doi.org/10.3390/su13020830 <https://doi.org/10.3390/su13020830>. 10.3390/su13020830
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Islam, Haidar
Mekhilef, Saad
Shah, Noraisyah Mohamed
Soon, Tey Kok
Wahyudie, Addy
Ahmed, Mahrous
Improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions
description When a photovoltaic (PV) system is exposed to physical objects and cloud coverage and connected to bypass diodes, a partial shading condition (PSC) occurs, which causes a global maximum power point (GMPP) and numerous local maximum power points (LMPPs) on the power-voltage (P-V) curve. Unlike conventional MPPT techniques that search for multiple LMPPs on the P-V curve, it is possible to track GMPP straightaway by designing a simple but robust MPPT technique that results in faster tracking speed and low power oscillations. Hence, in this study, an improved proportional-integral (PI) coordinated Maximum Power Point Tracking (MPPT) algorithm is designed to enhance the conversion efficiency of a PV system under PSC with fast-tracking speed and reduced power oscillations. Here, PI controllers are used to mitigating the steady-state errors of output voltage and current of PV system that later on passed through an incremental conductance (INC) algorithm to regulate the duty cycle of a dc-dc boost converter in order to ensure fast MPPT process. The PV system is integrated with the grid through an H-bridge inverter, which is controlled by a synchronous reference frame (SRF) controller. Tracking speed and steady-state oscillations of the proposed MPPT are evaluated in the MATLAB/Simulink environment and validated via a laboratory experimental setup using Agilent solar simulator and dSPACE (DS1104) controller. Results show that the proposed MPPT technique reduces the power fluctuations of PV array significantly and the tracking speed of the proposed method is 13% and 11% faster than the conventional INC and perturb and observe (P&O) methods respectively under PSCs.
format Article
author Islam, Haidar
Mekhilef, Saad
Shah, Noraisyah Mohamed
Soon, Tey Kok
Wahyudie, Addy
Ahmed, Mahrous
author_facet Islam, Haidar
Mekhilef, Saad
Shah, Noraisyah Mohamed
Soon, Tey Kok
Wahyudie, Addy
Ahmed, Mahrous
author_sort Islam, Haidar
title Improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions
title_short Improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions
title_full Improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions
title_fullStr Improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions
title_full_unstemmed Improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions
title_sort improved proportional-integral coordinated mppt controller with fast tracking speed for grid-tied pv systems under partially shaded conditions
publisher MDPI
publishDate 2021
url http://eprints.um.edu.my/28348/
_version_ 1739828452346822656
score 13.211869

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