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Stenberg, D. och Åkesson, J. (2016) Development of a system protection model against voltage collapse in PSS/E. Göteborg : Chalmers University of Technology
BibTeX
@mastersthesis{
Stenberg2016,
author={Stenberg, David and Åkesson, Joakim},
title={Development of a system protection model against voltage collapse in PSS/E},
abstract={This thesis investigates voltage instability leading to voltage collapse in PSS/E and
how such scenario can be prevented by the use of a system protection model which
has been proposed and developed in this thesis. The model sees the system as a
whole and can initiate a system protection response based on a voltage stability
indicator in parallel with signals from over excitation limiters (OELs).
Three case studies were performed for evaluating two well-known voltage stability
indicators in the literature, namely the Impedance Stability Index (ISI) and the
Transmission Path Stability Index (TPSI). The two first studies showed that one
of two methods to calculate the ISI gave a more stable result, which was selected
to be used in later case studies. Both indicators were then used and evaluated in a
third case study consisting of the Nordic 32-bus test system developed by Svenska
Kraftnat. In this case study, two separate contingency scenarios were designed to
cause a voltage collapse. It was found that the calculations of the ISI were time
consuming and did not indicate the margin to voltage collapse as clearly as the
TPSI did.
The TPSI and signals from OELs were used as input signals in the system protection
model designed to protect the power system. The model was designed to
generate control signals to change Automated Voltage Regulator (AVR) set-points
of synchronous generators and initiate load shedding schemes. The functionality
of the system protection model was successfully verified when its implementation
in PSS/E was able to prevent the voltage collapse scenarios designed in the third
case study. Voltage collapse in the first scenario was prevented by increasing AVR
set-points when OELs were activated and the TPSI value was lower than 0.15. The
second scenario was more severe and it was necessary to utilize both increasing
AVR set-points and as load shedding which was initialized when the TPSI dropped
below a threshold of 0.05.},
publisher={Institutionen för energi och miljö, Elteknik, Chalmers tekniska högskola},
place={Göteborg},
year={2016},
keywords={Voltage stability, Voltage stability indicators, Impedance stability index (ISI), Transmission path stability index (TPSI), PSS/E, System protection relay model, Automatic voltage regulator (AVR), Load shedding},
note={64},
}
RefWorks
RT Generic
SR Electronic
ID 243594
A1 Stenberg, David
A1 Åkesson, Joakim
T1 Development of a system protection model against voltage collapse in PSS/E
YR 2016
AB This thesis investigates voltage instability leading to voltage collapse in PSS/E and
how such scenario can be prevented by the use of a system protection model which
has been proposed and developed in this thesis. The model sees the system as a
whole and can initiate a system protection response based on a voltage stability
indicator in parallel with signals from over excitation limiters (OELs).
Three case studies were performed for evaluating two well-known voltage stability
indicators in the literature, namely the Impedance Stability Index (ISI) and the
Transmission Path Stability Index (TPSI). The two first studies showed that one
of two methods to calculate the ISI gave a more stable result, which was selected
to be used in later case studies. Both indicators were then used and evaluated in a
third case study consisting of the Nordic 32-bus test system developed by Svenska
Kraftnat. In this case study, two separate contingency scenarios were designed to
cause a voltage collapse. It was found that the calculations of the ISI were time
consuming and did not indicate the margin to voltage collapse as clearly as the
TPSI did.
The TPSI and signals from OELs were used as input signals in the system protection
model designed to protect the power system. The model was designed to
generate control signals to change Automated Voltage Regulator (AVR) set-points
of synchronous generators and initiate load shedding schemes. The functionality
of the system protection model was successfully verified when its implementation
in PSS/E was able to prevent the voltage collapse scenarios designed in the third
case study. Voltage collapse in the first scenario was prevented by increasing AVR
set-points when OELs were activated and the TPSI value was lower than 0.15. The
second scenario was more severe and it was necessary to utilize both increasing
AVR set-points and as load shedding which was initialized when the TPSI dropped
below a threshold of 0.05.
PB Institutionen för energi och miljö, Elteknik, Chalmers tekniska högskola,PB Institutionen för energi och miljö, Elteknik, Chalmers tekniska högskola,
LA eng
LK http://publications.lib.chalmers.se/records/fulltext/243594/243594.pdf
OL 30
