Study of solution towards ground leakage current via inverter switching in different topologies for grid connected PV system

Renewable energy sources are major issues in order to address the energy problem. Among them, the PV (Photovoltaic) system will be dominant because its availability and reliability. One of the common problems that arise due to the formation of solar PV panels is capacitive ground current. Althoug...

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Main Author:	Kimpol, Norhanisa
Format:	Thesis
Language:	English English English
Published:	2013
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.uthm.edu.my/6715/1/24p%20NORHANISA%20KIMPOL.pdf http://eprints.uthm.edu.my/6715/2/NORHANISA%20KIMPOL%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/6715/3/NORHANISA%20KIMPOL%20WATERMARK.pdf
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spelling	my-uthm-ep.67152022-03-14T02:14:30Z Study of solution towards ground leakage current via inverter switching in different topologies for grid connected PV system 2013-06 Kimpol, Norhanisa TK Electrical engineering. Electronics Nuclear engineering TK1001-1841 Production of electric energy or power. Powerplants. Central stations Renewable energy sources are major issues in order to address the energy problem. Among them, the PV (Photovoltaic) system will be dominant because its availability and reliability. One of the common problems that arise due to the formation of solar PV panels is capacitive ground current. Although transformer helps in reducing this problem, the poor side of having the transformer in PV systems is accounted to bulky in size and hard to install the entire PV system. Indirectly, the cost is higher and led to a lower efficiency due to higher losses of power. To solve this, transformerless inverter topology offers a solution for the efficiency, size and weight. The leakage current depends on both inverter topology and control strategy. In this report, different inverter topologies have been reviewed with respect to ground current formation due to inverter switching that causes varying common mode voltage that will excite the resonant circuit as well as causes the leakage current phenomenon. The transformerless inverter topologies that are considered are Bipolar H-Bridge, Modified HB-ZVR and NPC. In order to study the effect of having a transformer in eliminating the ground current, Bipolar H-Bridge inverter with transformer also include in this project. All proposed topologies are modelled and simulated to compare the pattern and behavior of ground leakage current with other existing topology. By comparing the pattern of the output from the simulation, a conclusion is given which proves that NPC topology are suitable for PV application due to low leakage current compared with other two topologies. 2013-06 Thesis http://eprints.uthm.edu.my/6715/ http://eprints.uthm.edu.my/6715/1/24p%20NORHANISA%20KIMPOL.pdf text en public http://eprints.uthm.edu.my/6715/2/NORHANISA%20KIMPOL%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/6715/3/NORHANISA%20KIMPOL%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Malaysia Fakulti Kejuruteraan Elektrik dan Elektronik
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TK Electrical engineering Electronics Nuclear engineering TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering TK Electrical engineering Electronics Nuclear engineering Kimpol, Norhanisa Study of solution towards ground leakage current via inverter switching in different topologies for grid connected PV system
description	Renewable energy sources are major issues in order to address the energy problem. Among them, the PV (Photovoltaic) system will be dominant because its availability and reliability. One of the common problems that arise due to the formation of solar PV panels is capacitive ground current. Although transformer helps in reducing this problem, the poor side of having the transformer in PV systems is accounted to bulky in size and hard to install the entire PV system. Indirectly, the cost is higher and led to a lower efficiency due to higher losses of power. To solve this, transformerless inverter topology offers a solution for the efficiency, size and weight. The leakage current depends on both inverter topology and control strategy. In this report, different inverter topologies have been reviewed with respect to ground current formation due to inverter switching that causes varying common mode voltage that will excite the resonant circuit as well as causes the leakage current phenomenon. The transformerless inverter topologies that are considered are Bipolar H-Bridge, Modified HB-ZVR and NPC. In order to study the effect of having a transformer in eliminating the ground current, Bipolar H-Bridge inverter with transformer also include in this project. All proposed topologies are modelled and simulated to compare the pattern and behavior of ground leakage current with other existing topology. By comparing the pattern of the output from the simulation, a conclusion is given which proves that NPC topology are suitable for PV application due to low leakage current compared with other two topologies.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Kimpol, Norhanisa
author_facet	Kimpol, Norhanisa
author_sort	Kimpol, Norhanisa
title	Study of solution towards ground leakage current via inverter switching in different topologies for grid connected PV system
title_short	Study of solution towards ground leakage current via inverter switching in different topologies for grid connected PV system
title_full	Study of solution towards ground leakage current via inverter switching in different topologies for grid connected PV system
title_fullStr	Study of solution towards ground leakage current via inverter switching in different topologies for grid connected PV system
title_full_unstemmed	Study of solution towards ground leakage current via inverter switching in different topologies for grid connected PV system
title_sort	study of solution towards ground leakage current via inverter switching in different topologies for grid connected pv system
granting_institution	Universiti Tun Hussein Malaysia
granting_department	Fakulti Kejuruteraan Elektrik dan Elektronik
publishDate	2013
url	http://eprints.uthm.edu.my/6715/1/24p%20NORHANISA%20KIMPOL.pdf http://eprints.uthm.edu.my/6715/2/NORHANISA%20KIMPOL%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/6715/3/NORHANISA%20KIMPOL%20WATERMARK.pdf
_version_	1747831087022735360

Study of solution towards ground leakage current via inverter switching in different topologies for grid connected PV system

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