(linjerevisjon)=

# Line outages (revisions)

Outages can be specified in the `linjerevisjon.csv` file.

|Note|
|-|
| Reduced trade capacities can be given as positive or negative numbers, both being treated equally (as a capacity reduction) in the model.|
|In case the capacity reduction exceeds the initial capacity, the reduced capacity is set to 0 MW.|
|There is currently no check if the outage year corresponds with the simulated year|
|It is possible to combine the modeling of outages in LINJEREVISJON and KOMBSNITT. However, we do **not recommend** it, as this modeling is error-prone.|
|The **first week** of revision should be lower than the **last week** of revision.|
| The capacity outages specified in the linjerevisjon.csv file will impact the load flow and PTDF computations. Optionally, capacity outage modelled in {ref}`KOMBSNITT.DAT <kombsnitt>` will not directly impact the load flow and PTDF computations in Samnett. It will only limit the left- and right-hand side of the PTDF-constraints.  |

One needs to specify a valid line (from busbar – to busbar), but the impact of the outage on a monitored interconnection can be omitted.

This file contains the following data:
```text
- Header description
For each line outage:
    - Outage parameters
```
## Header description

Description of the outage parameters

Record format:

```text
<Week out>, <Load period out>, <Week in>, <Load period>, <From busbar>, <To busbar>, <Capacity reduction from_to>, <Capacity reduction to_from>,
```

Example:

```text
Week out, Load period out, Week in, Load period, From busbar, To busbar, Capacity reduction from_to, Capacity reduction to_from,
```

## Outage parameters

Record format:

```text
<Week out>; <Load period out>; <Week in>; <Load period>; <From busbar>; <To busbar>; <Capacity reduction from_to>; <Capacity reduction to_from>;<Area name interconnection end-point from>; <Area name interconnection end-point to>
```
Example:

Aggregate 4 areas for the computation of PTDFs. The areas to aggregate are area 1, 2, 3 and 4 and the aggregated area name is NO4.

```text
1; 1; 5; 20; 58503; 58053; 2000; 2000; FINNMARK; TROMS;
6; 4;23;  8; 58503; 58053; 1300; 1000; FINNMARK; TROMS;
```

## Example complete file

```
Uke ut;Prisavsnitt ut;uke inn;prisavsnitt inn;fra bus;til bus;MW ute pos;MW ute neg;Snitt fra omr;snitt til omr
3;4;7;2;20022;30013;45;35;TEV;OTRA;
7;4;9;3;10021;30023;35;42;NUMEDAL;OTRA;
7;4;9;3;20022;30013;35;42;TEV;OTRA;
10;2;11;4;20022;30013;41;31.3;TEV;OTRA;
3;4;7;2;10021;30023;45;35;NUMEDAL;OTRA;
10;2;11;4;10021;30023;41;31.3;NUMEDAL;OTRA;
```