This document summarizes the net transfer capacity (NTC) calculations between Armenia and Georgia for winter and summer maximum regimes in 2020 and plans for 2025. It provides the key details of the tie lines between the two countries, describes the NTC calculation steps, and shows the results of the NTC calculations for both winter and summer. The winter NTC is 350 MW from Georgia to Armenia and 300 MW from Armenia to Georgia. The summer NTC is 200 MW from Georgia to Armenia and 150 MW from Armenia to Georgia. Plans for 2025 include a new 500 kV back-to-back HVDC interconnection.

1. Net Transfer Capacity (NTC) Between
Armenia and Georgia
2020
• Winter Max
• Summer Max

2. Presentation Overview
• Tie lines between Armenia & Georgia 2020
• Future links between Armenia & Georgia 2025
• NTC calculation procedure
• NTC calculation results

3. Tie Lines Between Armenia-Georgia
SS Gardabani SS Marneuli
AM-GE
Border
220 kV
220 kV
SS Alaverdi-2 Hrazdan TPP
400 kV
400 kV

4. Future links between Armenia & Georgia
2025
SS Marneuli
AM - GE
Border
500 kV220 kV
SS Alaverdi-2
Hrazdan TPP
400 kV
400 kV
Back-to-back HVDC

5. NTC Calculation Step by Step
Implement LF
calculation to identify
base case interchange
(BCE)
Implement
contingency analysis
Check
violations
Yes
No
Change interchange
value
TTC = BCE + ΔEmax
NTC = TTC - TRM
TTC - Total transfer Capacity
ΔEmax - Max exchange program
between to areas
TRM – Transmission reliability margin

6. Net Transfer Capacity
Winter Maximum Regime
Source TSO - Georgia
Sink TSO - Armenia
Source TSO - Armenia
Sink TSO - Georgia
Direction BCE
(MW)
NTF
(MW)
ΔEmax
(MW)
TTC
(MW)
TRM
(MW)
GEAM -300 -272.9 750 450 100
NTC
(MW)
350
Outage
of the NE
Overload
of the NE
I/Imax %
400 kV Line 220 kV Line 102.2
Direction BCE
(MW)
NTF
(MW)
ΔEmax
(MW)
TTC
(MW)
TRM
(MW)
AMGE 300 272.9 100 300 100
NTC
(MW)
300
Outage
of the NE
Overload
of the NE
I/Imax %
400 kV Line 220 kV Line 109.6

7. Net Transfer Capacity
Summer Maximum Regime
Source TSO - Georgia
Sink TSO - Armenia
Source TSO - Armenia
Sink TSO - Georgia
Direction BCE
(MW)
NTF
(MW)
ΔEmax
(MW)
TTC
(MW)
TRM
(MW)
GEAM -250 -244 550 300 100
NTC
(MW)
200
Outage
of the NE
Overload
of the NE
I/Imax %
400 kV Line 220 kV Line 102.5
Direction BCE
(MW)
NTF
(MW)
ΔEmax
(MW)
TTC
(MW)
TRM
(MW)
AMGE 250 244 0 250 100
NTC
(MW)
150
Outage
of the NE
Overload
of the NE
I/Imax %
400 kV Line 220 kV Line 101.8
Note: NTC calculation is implemented taking into account that line transfer capacity varies depending
from air temperature.

8. Presentation Overview
• New updated Load Flow models should take
into account seasonal thermal limitations in terms
of elements rates.
• New planned Back-to-back HVDC system will be
taken into account in further analyses.
• Taking into account previously mentioned, new
Base Case Power Exchanges between areas should
be adjusted and reviewed.

9. Thank you!