Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control

Background: Due to the high level of photovoltaic power plants (PVPPs) penetration into power grids, disconnections of these plants during faults are no longer possible as it may cause problems concerning stability, quality, and operation of the power system. Therefore, new grid codes have been esta...

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Main Authors:	Al-Shetwi, Ali Q., Muhamad Zahim, Sujod
Format:	Article
Language:	English
Published:	Bentham Science Publishers 2019
Subjects:	TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://umpir.ump.edu.my/id/eprint/23963/ http://umpir.ump.edu.my/id/eprint/23963/ http://umpir.ump.edu.my/id/eprint/23963/ http://umpir.ump.edu.my/id/eprint/23963/1/Voltage%20Sag%20Detection%20in%20Grid-Connected1.pdf

id	ump-23963
recordtype	eprints
spelling	ump-239632019-10-18T02:38:19Z http://umpir.ump.edu.my/id/eprint/23963/ Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control Al-Shetwi, Ali Q. Muhamad Zahim, Sujod TK Electrical engineering. Electronics Nuclear engineering Background: Due to the high level of photovoltaic power plants (PVPPs) penetration into power grids, disconnections of these plants during faults are no longer possible as it may cause problems concerning stability, quality, and operation of the power system. Therefore, new grid codes have been established with low voltage ride-through (LVRT) capability standard requirements for grid-connected PVPPs that should be met. Therefore, for an efficient LVRT control, the fast and precise sag detection strategy is essential for the system to switch from normal operation to LVRT mode of operation. Methods: For this purpose, this paper presents a two automatic fault detection methods which are RMS-based (d-q) components of grid voltage and positive sequence voltage. These methods were utilized to determine the beginning and end of a voltage sag and to determine the sag depth to regulate the required reactive current that should be injected according to the LVRT standard requirements. The operating method depends on calculating present grid voltage under faults to the nominal voltage that identifies the sags’ depth and therefore inject the required amount of reactive power accordingly. Also, a comparison between the two proposed methods regarding response speed and accuracy was made. The effectiveness of these detection strategies is that it can be integrated into the voltage source inverter (VSI) without utilizing additional external hardware or software programming. Results: The simulation results demonstrated a good precision and how straightforward the proposed methods’ usage is, proving that the RMS method is faster and more accurate than positive sequence method. Bentham Science Publishers 2019 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/23963/1/Voltage%20Sag%20Detection%20in%20Grid-Connected1.pdf Al-Shetwi, Ali Q. and Muhamad Zahim, Sujod (2019) Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control. Recent Advances in Electrical & Electronic Engineering, 12. pp. 1-9. ISSN 2352-0973 https://doi.org/10.2174/2352096511666180626151223 https://doi.org/10.2174/2352096511666180626151223
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering Al-Shetwi, Ali Q. Muhamad Zahim, Sujod Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control
description	Background: Due to the high level of photovoltaic power plants (PVPPs) penetration into power grids, disconnections of these plants during faults are no longer possible as it may cause problems concerning stability, quality, and operation of the power system. Therefore, new grid codes have been established with low voltage ride-through (LVRT) capability standard requirements for grid-connected PVPPs that should be met. Therefore, for an efficient LVRT control, the fast and precise sag detection strategy is essential for the system to switch from normal operation to LVRT mode of operation. Methods: For this purpose, this paper presents a two automatic fault detection methods which are RMS-based (d-q) components of grid voltage and positive sequence voltage. These methods were utilized to determine the beginning and end of a voltage sag and to determine the sag depth to regulate the required reactive current that should be injected according to the LVRT standard requirements. The operating method depends on calculating present grid voltage under faults to the nominal voltage that identifies the sags’ depth and therefore inject the required amount of reactive power accordingly. Also, a comparison between the two proposed methods regarding response speed and accuracy was made. The effectiveness of these detection strategies is that it can be integrated into the voltage source inverter (VSI) without utilizing additional external hardware or software programming. Results: The simulation results demonstrated a good precision and how straightforward the proposed methods’ usage is, proving that the RMS method is faster and more accurate than positive sequence method.
format	Article
author	Al-Shetwi, Ali Q. Muhamad Zahim, Sujod
author_facet	Al-Shetwi, Ali Q. Muhamad Zahim, Sujod
author_sort	Al-Shetwi, Ali Q.
title	Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control
title_short	Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control
title_full	Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control
title_fullStr	Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control
title_full_unstemmed	Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control
title_sort	voltage sag detection in grid-connected photovoltaic power plant for low voltage ride-through control
publisher	Bentham Science Publishers
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/23963/ http://umpir.ump.edu.my/id/eprint/23963/ http://umpir.ump.edu.my/id/eprint/23963/ http://umpir.ump.edu.my/id/eprint/23963/1/Voltage%20Sag%20Detection%20in%20Grid-Connected1.pdf
first_indexed	2023-09-18T22:36:06Z
last_indexed	2023-09-18T22:36:06Z
_version_	1777416605937958912

Voltage Sag Detection in Grid-Connected Photovoltaic Power Plant for Low Voltage Ride-Through Control

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