OPF For An HVDC Feeder Solution For Railway
Power Supply Systems
Author(s)
J. Laury, L. Abrahamsson & S. O¨ stlund
Abstract
With increasing railway traffic, the demand for electrical power increases.
However, railway power systems are often weak causing high transmission losses
and large voltage drops.
One possible method for strengthening the railway power supply system is
to implement a High Voltage Direct Current (HVDC) feeder in parallel to the
Overhead Contact Line (OCL). The HVDC feeder is connected to the OCL by
converters.
This paper describes different properties and characteristics of such an HVDC
feeder solution. An AC/DC unified Optimal Power Flow (OPF) model and unit
commitment is used to obtain proper control of the converters.
The non-linear load flow and converter loss equations, and the binary variables
for the unit commitment, lead to an optimization problem of Mixed Integer Non-
Linear Programming (MINLP) type. The optimization problem is formulated in
the software GAMS, and is solved by the solver BONMIN. In each case, the
objective has been to minimize the total active power losses.
Keywords: HVDC, MINLP, OPF, railway, unit commitment, load flow.
Keywords
HVDC, MINLP, OPF, railway, unit commitment, load flow.
Related Book
Other papers in this volume
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