# WECC

_Source: `examples/PhasorDynamics/Large/WECC/README.md`_

## Western Electricity Coordinating Council (WECC)

### One-Line Diagram

   
```{image} ../../../../../../examples/PhasorDynamics/Large/WECC/wecc.jpg
:align: center
```


  Figure 1: Oneline of the WECC case of [National Laboratory of the Rockies](https://www.nlr.gov/grid/test-case-repository)

### Case Description

This case is adapted from the [National Laboratory of the Rockies](https://www.nlr.gov/grid/test-case-repository) WECC Model.

It is configured with GridKit-compatible dynamic models.

Model | Count
---|---
[Bus](../../../../../models/generated/phasor-dynamics/bus/index.md) | 243
[Branch](../../../../../models/generated/phasor-dynamics/branch/index.md) | 447
[GENROU](../../../../../models/generated/phasor-dynamics/synchronous-machine/genrouw-s/index.md) | 140
[TGOV1](../../../../../models/generated/phasor-dynamics/governor/tgov1/index.md) | 103
[SEXS-PTI](../../../../../models/generated/phasor-dynamics/exciter/sexs-pti/index.md) | 103
[IEEEST](../../../../../models/generated/phasor-dynamics/stabilizer/ieeest/index.md)  | 10
[LoadZIP](../../../../../models/generated/phasor-dynamics/load-zip/index.md) | 146
[SignalNode](https://github.com/ORNL/GridKit/tree/lukel/readthedocs-dev/GridKit/Model/PhasorDynamics/SignalNode) | 319

### Data Notes

None.


### Events

The following event types are provided for this case.

- Bus fault


### Outstanding

#### Dynamics

Only one exciter model is outstanding:
- REECB1
- GAST_PTI
- REGCA
- REPCA1

The following examples needs to be constructed with this case.
- Line Outage
- Generator Outage
- Forced Oscillations

#### Statics

GridKit models Switched Shunts and Transformers with constant impedance, but this erases information and our ability to statically re-initialze the model if initalizing at a different operating point.

- Switched Shunts
- Transformers (LTC and Tap Ratios $\neq 1$)