Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection

In this research, a fast-synchronization between single-phase microgrid and inverter in low voltage, which is based on virtual synchronous converter (VSCon) technique is been developed. This technique does not require any phase locked loop (PLL) circuit as an external control structure for the synch...

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Main Author:	Amin, Md Ruhul
Format:	Thesis
Language:	English English English
Published:	2017
Subjects:	TK2000-2891 Dynamoelectric machinery and auxiliaries Including generators, motors, transformers
Online Access:	http://eprints.uthm.edu.my/793/1/24p%20MD%20RUHUL%20AMIN.pdf http://eprints.uthm.edu.my/793/2/MD%20RUHUL%20AMIN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/793/3/MD%20RUHUL%20AMIN%20WATERMARK.pdf
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spelling	my-uthm-ep.7932021-08-30T08:04:35Z Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection 2017-04 Amin, Md Ruhul TK2000-2891 Dynamoelectric machinery and auxiliaries. Including generators, motors, transformers In this research, a fast-synchronization between single-phase microgrid and inverter in low voltage, which is based on virtual synchronous converter (VSCon) technique is been developed. This technique does not require any phase locked loop (PLL) circuit as an external control structure for the synchronization of the inverter. As known, PLL is a common technique in order to synchronize the amplitude, phase-angle and frequency between a microgrid and an inverter in distributed generation network. Previous studies show that, the disadvantage of PLLs is where the non-linear characteristic on the signal process will result the inverter control to be non-linear. Therefore, it is difficult and lengthy process to tune the PLL gains to reach suitable performance in order to synchronize the voltage, phase-angle and frequency between microgrid and inverter. As a result, a VSCon is been developed in which it is a self-synchronized inverter which is based on synchronous generator mathematical model. This controller acts like as synchronous generator operating system in inverter control loop in order to achieve fast voltage, phase and frequency synchronization between inverter-microgrid connection. This technique has been modeled, simulated and tested in Matlab/Simulink software. It is by using a single-phase AC source input system connecting with several load variations during simulation period. This VSCon has been placed in inverter control loop to generate a pulse width modulation (PWM) signal that responds to the grid information for to synchronizing the inverter output voltage with the grid voltage. A single source input at 120V, 50Hz frequency and 240V, 50Hz frequency are used in order to see the self-synchronization response between a microgrid and an inverter. Furthermore, it also been tested when the grid frequency has been changed from the rated frequency at 50Hz to 51Hz and the result shows that, VSCon takes nearly 1-cycle to synchronize to this new frequency value. The grid phase angle test also has been conducted. For this test, the voltage grid which has 100 phase delay has been created in the input voltage source at microgrid side. As a result, the VSCon is also able to achieve self-synchronization with this new source 2017-04 Thesis http://eprints.uthm.edu.my/793/ http://eprints.uthm.edu.my/793/1/24p%20MD%20RUHUL%20AMIN.pdf text en public http://eprints.uthm.edu.my/793/2/MD%20RUHUL%20AMIN%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/793/3/MD%20RUHUL%20AMIN%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Elektrik dan Elektronik
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TK2000-2891 Dynamoelectric machinery and auxiliaries Including generators, motors, transformers
spellingShingle	TK2000-2891 Dynamoelectric machinery and auxiliaries Including generators, motors, transformers Amin, Md Ruhul Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection
description	In this research, a fast-synchronization between single-phase microgrid and inverter in low voltage, which is based on virtual synchronous converter (VSCon) technique is been developed. This technique does not require any phase locked loop (PLL) circuit as an external control structure for the synchronization of the inverter. As known, PLL is a common technique in order to synchronize the amplitude, phase-angle and frequency between a microgrid and an inverter in distributed generation network. Previous studies show that, the disadvantage of PLLs is where the non-linear characteristic on the signal process will result the inverter control to be non-linear. Therefore, it is difficult and lengthy process to tune the PLL gains to reach suitable performance in order to synchronize the voltage, phase-angle and frequency between microgrid and inverter. As a result, a VSCon is been developed in which it is a self-synchronized inverter which is based on synchronous generator mathematical model. This controller acts like as synchronous generator operating system in inverter control loop in order to achieve fast voltage, phase and frequency synchronization between inverter-microgrid connection. This technique has been modeled, simulated and tested in Matlab/Simulink software. It is by using a single-phase AC source input system connecting with several load variations during simulation period. This VSCon has been placed in inverter control loop to generate a pulse width modulation (PWM) signal that responds to the grid information for to synchronizing the inverter output voltage with the grid voltage. A single source input at 120V, 50Hz frequency and 240V, 50Hz frequency are used in order to see the self-synchronization response between a microgrid and an inverter. Furthermore, it also been tested when the grid frequency has been changed from the rated frequency at 50Hz to 51Hz and the result shows that, VSCon takes nearly 1-cycle to synchronize to this new frequency value. The grid phase angle test also has been conducted. For this test, the voltage grid which has 100 phase delay has been created in the input voltage source at microgrid side. As a result, the VSCon is also able to achieve self-synchronization with this new source
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Amin, Md Ruhul
author_facet	Amin, Md Ruhul
author_sort	Amin, Md Ruhul
title	Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection
title_short	Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection
title_full	Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection
title_fullStr	Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection
title_full_unstemmed	Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection
title_sort	self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Elektrik dan Elektronik
publishDate	2017
url	http://eprints.uthm.edu.my/793/1/24p%20MD%20RUHUL%20AMIN.pdf http://eprints.uthm.edu.my/793/2/MD%20RUHUL%20AMIN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/793/3/MD%20RUHUL%20AMIN%20WATERMARK.pdf
_version_	1747830682671906816

Self-synchronized converter for fast synchronization between low voltage microgrid and inverter connection

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