Abstract
The railway represents a large power consumer that
can cause uneven loading of the phases in the high
voltage grid. These unbalanced loads supplied by
the utility may lead to voltage unbalance problems
in the system and thereby affects the other
consumers connected to the same network. It is fact
that, voltage unbalance appears mainly as a result of
unbalanced currents at the points of common
coupling drawn by unevenly distributed loads.
Because of a significant amount of negative
sequence current injected to the system, the power
system components will suffer from consequent
negative effects such as overheating, additional
losses of lines and transformers, interference with
communication systems etc. This paper presents a
comparative study of some transformer connections
which commonly used in railway supplying AC
traction loads, for voltage unbalance mitigations.
Simulations for comparison of transformers are
carried out and the results are also compared with
the values obtained by the voltage unbalance
estimation formulas.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of 10th International Conference on Advances in Power System Control, Operation & Management (APSCOM 2015) |
| Number of pages | 6 |
| Publisher | IEEE |
| Publication date | 2015 |
| DOIs | |
| Publication status | Published - 2015 |
| Event | 10th IET International Conference on Advances in Power System Control, Operation and Management - Hong Kong, Hong Kong Duration: 8 Nov 2015 → 12 Nov 2015 Conference number: 10 |
Conference
| Conference | 10th IET International Conference on Advances in Power System Control, Operation and Management |
|---|---|
| Number | 10 |
| Country/Territory | Hong Kong |
| City | Hong Kong |
| Period | 08/11/2015 → 12/11/2015 |
Keywords
- Electrified railways
- Traction loads
- Voltage unbalance
- Transformer connections