Limitations of voltage source converter in weak ac networks from voltage stability point of view

F. Alsokhiry; G.P. Adam; Y. Al-Turki

Limitations of voltage source converter in weak ac networks from voltage stability point of view

F. Alsokhiry, G.P. Adam, Y. Al-Turki

Electronic And Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A weak ac grid could be envisioned as a voltage source behind a large synchronous impedance; thus the phase and magnitude of its terminal voltage vary significantly with the magnitudes of active and reactive powers it sinks or sources. Such characteristics present formidable challenges to control and stability of voltage source converters in weak ac grids. Therefore, this paper presents a theoretical analysis which establishes the maximum active power transfer that the voltage source converter (VSC) can exchange with a weak ac grid. The presented analysis reveals that the maximum active power that the VSC can exchange with a weak ac grid is determined by voltage stability limit. The validity of the presented theoretical analysis is confirmed by simplified simulation, and further corroborated by detailed simulations from a VSC model, developed in MATLAB-SIMULINK that incorporates all necessary control systems.

Original language	English
Journal	International Journal of Power and Energy Systems
Publication status	Accepted/In press - 31 Jan 2020

Keywords

voltage source converter
voltage stability limit
reactive power support
weak ac grid
d point-of-collapse

Access to Document

https://www.actapress.com/Content_Of_Journal.aspx?JournalID=239

Fingerprint Dive into the research topics of 'Limitations of voltage source converter in weak ac networks from voltage stability point of view'. Together they form a unique fingerprint.

Cite this

@article{a0607d5c6dc040969912ce67e69fa5b6,

title = "Limitations of voltage source converter in weak ac networks from voltage stability point of view",

abstract = "A weak ac grid could be envisioned as a voltage source behind a large synchronous impedance; thus the phase and magnitude of its terminal voltage vary significantly with the magnitudes of active and reactive powers it sinks or sources. Such characteristics present formidable challenges to control and stability of voltage source converters in weak ac grids. Therefore, this paper presents a theoretical analysis which establishes the maximum active power transfer that the voltage source converter (VSC) can exchange with a weak ac grid. The presented analysis reveals that the maximum active power that the VSC can exchange with a weak ac grid is determined by voltage stability limit. The validity of the presented theoretical analysis is confirmed by simplified simulation, and further corroborated by detailed simulations from a VSC model, developed in MATLAB-SIMULINK that incorporates all necessary control systems.",

keywords = "voltage source converter, voltage stability limit, reactive power support, weak ac grid, d point-of-collapse",

author = "F. Alsokhiry and G.P. Adam and Y. Al-Turki",

year = "2020",

month = jan,

day = "31",

language = "English",

journal = "International Journal of Power and Energy Systems",

issn = "1078-3466",

}

TY - JOUR

T1 - Limitations of voltage source converter in weak ac networks from voltage stability point of view

AU - Alsokhiry, F.

AU - Adam, G.P.

AU - Al-Turki, Y.

PY - 2020/1/31

Y1 - 2020/1/31

N2 - A weak ac grid could be envisioned as a voltage source behind a large synchronous impedance; thus the phase and magnitude of its terminal voltage vary significantly with the magnitudes of active and reactive powers it sinks or sources. Such characteristics present formidable challenges to control and stability of voltage source converters in weak ac grids. Therefore, this paper presents a theoretical analysis which establishes the maximum active power transfer that the voltage source converter (VSC) can exchange with a weak ac grid. The presented analysis reveals that the maximum active power that the VSC can exchange with a weak ac grid is determined by voltage stability limit. The validity of the presented theoretical analysis is confirmed by simplified simulation, and further corroborated by detailed simulations from a VSC model, developed in MATLAB-SIMULINK that incorporates all necessary control systems.

AB - A weak ac grid could be envisioned as a voltage source behind a large synchronous impedance; thus the phase and magnitude of its terminal voltage vary significantly with the magnitudes of active and reactive powers it sinks or sources. Such characteristics present formidable challenges to control and stability of voltage source converters in weak ac grids. Therefore, this paper presents a theoretical analysis which establishes the maximum active power transfer that the voltage source converter (VSC) can exchange with a weak ac grid. The presented analysis reveals that the maximum active power that the VSC can exchange with a weak ac grid is determined by voltage stability limit. The validity of the presented theoretical analysis is confirmed by simplified simulation, and further corroborated by detailed simulations from a VSC model, developed in MATLAB-SIMULINK that incorporates all necessary control systems.

KW - voltage source converter

KW - voltage stability limit

KW - reactive power support

KW - weak ac grid

KW - d point-of-collapse

UR - https://www.actapress.com/Content_Of_Journal.aspx?JournalID=239

M3 - Article

JO - International Journal of Power and Energy Systems

JF - International Journal of Power and Energy Systems

SN - 1078-3466

ER -