The economic evaluation results for the three SOP
interconnection scenarios are shown Table A-2.73
Annex Case studies MVDC economics
A.Tr),
and interconnection between substations (S/S).
In the SOP MVDC interconnection scenario
between main transformers, Table A-2 shows that
SOP MVDC implementation more advantageous
than constructing new main transformer when
the SOP capacity MVA less.
The economic analysis assumes imbalance in
power supply demand between facilities both
ends the SOP and evaluates the investment
avoidance benefits SOP implementation. shown Figure A-5, SOP
interconnection scenarios within the distribution
network can categorized into three types:
interconnection between distribution lines (D/L),
interconnection between main transformers (M. Therefore, for
SOP interconnection between distribution lines,
smaller capacities and longer distances from the
feeder point are more economically favourable. the
SOP capacity increases MVA, the economic
advantage length extends km. Similarly, in
the SOP interconnection scenario between 154 kV
distribution substations, SOP MVDC becomes
a more viable alternative building new AC
substation when the capacity MVA less and
the distance between substations less.
As shown Table A-2, using SOP MVDC
interconnection between distribution lines, when
the SOP capacity MVA (that is, the power
supply demand imbalance between the two
connected distribution lines MVA), the
SOP MVDC interconnection point must at
least away from the feeder point the
distribution line more cost-effective than
constructing new distribution line.
Figure A-5 MVDC applied SOP interconnection scenario
.3 SOP linkage between
distribution lines
Third scenario: investment avoidance scenario
that utilizes SOP interconnection address
load imbalances
