Repository: e2nIEE/pandapower

Issue:
Shunt values for CIGRE HV network are incorrect
### Issue Report Checklist

* [x] Searched the [issues page](https://github.com/e2nIEE/pandapower/issues) for similar reports
* [x] Read the relevant sections of the [documentation](https://pandapower.readthedocs.io/en/latest/about.html) 
* [x] Browse the [tutorials](https://github.com/e2nIEE/pandapower/tree/develop/tutorials) and [tests](https://github.com/e2nIEE/pandapower/tree/develop/pandapower/test) for usefull code snippets and examples of use



I believe the shunt values for the CIGRE HV grid are incorrect by a factor of 1000.

When comparing the simulation results of 
```
import pandapower as power
from pandapower import networks
net = networks.cigre_networks.create_cigre_network_hv()
power.runpp(net, calculate_voltage_angles=False)
print(net.res_bus)
```
with the power flow results given in the original literature [1] (Tab. 9.2), one can see that they do not match.

This is due to an error in the shunts `q_mvar` column. From the literature (Tab. 5.9) they are given as [160, 80, 180] MVAr. But in PandaPower they are [0.16, 0.08, 0.18] MVar.

## Possible Solutions
The solution is to change the affected values like this:
```
import pandapower as power
from pandapower import networks
net = networks.cigre_networks.create_cigre_network_hv()
net.shunt["q_mvar"] *= 1000
power.runpp(net, calculate_voltage_angles=False)
print(net.res_bus)
```

Alternatively
```
diff --git a/pandapower/networks/cigre_networks.py b/pandapower/networks/cigre_networks.py
index 93e82dc1d..55181f80c 100644
--- a/pandapower/networks/cigre_networks.py
+++ b/pandapower/networks/cigre_networks.py
@@ -122,9 +122,9 @@ def create_cigre_network_hv(length_km_6a_6b=0.1):
     pp.create_gen(net_cigre_hv, bus12, vm_pu=1.03, p_mw=300, name='Generator 12')
 
     # Shunts
-    pp.create_shunt(net_cigre_hv, bus4, p_mw=0.0, q_mvar=-0.16, name='Shunt 4')
-    pp.create_shunt(net_cigre_hv, bus5, p_mw=0.0, q_mvar=-0.08, name='Shunt 5')
-    pp.create_shunt(net_cigre_hv, bus6a, p_mw=0.0, q_mvar=-0.18, name='Shunt 6a')
+    pp.create_shunt(net_cigre_hv, bus4, p_mw=0.0, q_mvar=-160, name='Shunt 4')
+    pp.create_shunt(net_cigre_hv, bus5, p_mw=0.0, q_mvar=-80, name='Shunt 5')
+    pp.create_shunt(net_cigre_hv, bus6a, p_mw=0.0, q_mvar=-180, name='Shunt 6a')
 
     # Bus geo data
     net_cigre_hv.bus_geodata = read_json(
```

This also results in bus voltages being within `1 +- 0.05 pu`

## Versions

* pandapower version: develop
* Operating System name/version: debian11

## Sources
* [1] CIGRE Task Force C6.05 - Benchmark Systems for Network Integration of Renewable and Distributed Energy Resources - Issue 575 - 2014

## Labels (if access available)
* [ ] Choose a `labels` at the right side (e.g. `bug`, `controller`, `OPF`...)



Discussion:

Resolving patch:
diff --git a/pandapower/networks/cigre_networks.py b/pandapower/networks/cigre_networks.py
--- a/pandapower/networks/cigre_networks.py
+++ b/pandapower/networks/cigre_networks.py
@@ -122,9 +122,9 @@ def create_cigre_network_hv(length_km_6a_6b=0.1):
     pp.create_gen(net_cigre_hv, bus12, vm_pu=1.03, p_mw=300, name='Generator 12')
 
     # Shunts
-    pp.create_shunt(net_cigre_hv, bus4, p_mw=0.0, q_mvar=-0.16, name='Shunt 4')
-    pp.create_shunt(net_cigre_hv, bus5, p_mw=0.0, q_mvar=-0.08, name='Shunt 5')
-    pp.create_shunt(net_cigre_hv, bus6a, p_mw=0.0, q_mvar=-0.18, name='Shunt 6a')
+    pp.create_shunt(net_cigre_hv, bus4, p_mw=0.0, q_mvar=-160, name='Shunt 4')
+    pp.create_shunt(net_cigre_hv, bus5, p_mw=0.0, q_mvar=-80, name='Shunt 5')
+    pp.create_shunt(net_cigre_hv, bus6a, p_mw=0.0, q_mvar=-180, name='Shunt 6a')
 
     # Bus geo data
     net_cigre_hv.bus_geodata = read_json(


Test patch: