TY - GEN
T1 - Serving low load levels by derating line voltage using step down transformers
AU - Melato, Popi
AU - Mbuli, Nhlanhla
AU - Pretorius, Jan Harm
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/11/30
Y1 - 2015/11/30
N2 - Steady state voltage problems in power systems are those associated with undervoltages resulting from increasing loads. Steady overvoltages can also arise when loads served by networks are reduced, and the problem can be exacerbated if lines supplying load centres are long. This paper reports on a study that was conducted to assess the impact of derating voltage of lines, by using step down transformers on the lowest load a network can accommodate without overvoltages. A program written in Python and using PSS/E to perform loadflows, was used to perform analyses at various load levels. The study showed that with derating transformers installed, voltages in the system were better, there was less reactive power flow, and active power losses were lower. Derating lines using step down transformers is therefore a potential solution for serving low load levels.
AB - Steady state voltage problems in power systems are those associated with undervoltages resulting from increasing loads. Steady overvoltages can also arise when loads served by networks are reduced, and the problem can be exacerbated if lines supplying load centres are long. This paper reports on a study that was conducted to assess the impact of derating voltage of lines, by using step down transformers on the lowest load a network can accommodate without overvoltages. A program written in Python and using PSS/E to perform loadflows, was used to perform analyses at various load levels. The study showed that with derating transformers installed, voltages in the system were better, there was less reactive power flow, and active power losses were lower. Derating lines using step down transformers is therefore a potential solution for serving low load levels.
KW - Active power losses
KW - Power System Simulator for Engineering (PSS/E)
KW - Python Programming Language
KW - steady state overvoltages
KW - step down transformers
UR - http://www.scopus.com/inward/record.url?scp=84958074654&partnerID=8YFLogxK
U2 - 10.1109/UPEC.2015.7339886
DO - 10.1109/UPEC.2015.7339886
M3 - Conference contribution
AN - SCOPUS:84958074654
T3 - Proceedings of the Universities Power Engineering Conference
BT - Proceedings - 2015 50th International Universities Power Engineering Conference, UPEC 2015
PB - IEEE Computer Society
T2 - 50th International Universities Power Engineering Conference, UPEC 2015
Y2 - 1 September 2015 through 4 September 2015
ER -