Data Format for Transmission Expansion Planning.
The data is useful when DC model of power system is USED.
There are four type of data:

1) Mw per-unit (p.u) of power system
2) Planning stages;
3) Transmission Buses in each planning stage
4) HVAC Transmission lines data.
5) HVDC Transmission lines data (if data are available).

1) System power Per-unit:
ITEM.No    DESCRIPTION
1                Mw Per-unit of the System

2) STAGE DATA
ITEM.No    DESCRIPTION
1                Stage Number
2                Discount factor to find the net present value for the transmission                                           investment (%).

3) BUS DATA
ITEM.No    DESCRIPTION
1                Bus Number
2                Bus Name
3                Bus Type: 0 -> Load, 1 -> Generator, 2 -> Slack
4                Load (MW)
5                Maximum generation limit (MW)
6                Stage

4) HVAC LINES DATA
ITEM.No    DESCRIPTION
1                Line Number
2                «From» Bus
3                «To» Bus
4                Line resistance (P.u)
5                Line reactance (P.u)
6                Number of existence lines
7                Maximum power flow limit in the line (MW)
8                Investment cost of the line (MUSD$)
9                Maximum number of transmission lines in corridor
10              Length (km) (if data are available)

4) HVDC LINES DATA
ITEM.No    DESCRIPTION
1                Line Number
2                «From» Bus
3                «To» Bus
4                Line resistance (P.u)
5                Number of existence lines
6                Maximum power flow limit in the line (MW)
7                Investment cost of the line (include converters units cost) (MUSD$)
8                Maximum number of transmission lines in corridor
9                Length (km) (if data are available)