fictive load on isolated bus keeps hvdc isolated #1120
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src/main/java/com/powsybl/openloadflow/network/impl/HvdcConverterStations.java
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Signed-off-by: Didier Vidal <didier.vidal_externe@rte-france.com>
Signed-off-by: Didier Vidal <didier.vidal_externe@rte-france.com>
Signed-off-by: Didier Vidal <didier.vidal_externe@rte-france.com>
Signed-off-by: Didier Vidal <didier.vidal_externe@rte-france.com>
Signed-off-by: Didier Vidal <didier.vidal_externe@rte-france.com>
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Signed-off-by: Didier Vidal <didier.vidal_externe@rte-france.com>
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Please check if the PR fulfills these requirements
Does this PR already have an issue describing the problem?
No
What kind of change does this PR introduce?
In #965 a simple criteria was added to detect an HVDC disconnection on one side :
A station is isolated if its merged bus is not connected to any other bus neither to a load or a group.
This criteria was meant to detect quickly contingencies that disconnect a line, while allowing simple models where one side is merely simplified as a group or a load.
But in real networks it happens that a fictive load is added to a station.
This fix considers that if an HVDC's stations contains only fictive loads it is still considered isolated.
NOTE that this criteria for automatic HVDC disconnection in a contingncy is not documented at this time. There is currently no good place to document how contingenices are propagated, when the propagation is not obvious.
What is the current behavior?
If a contingency isolates a bus that is connected to a fictive load and an HVDC station, the HVDC is considered working.
What is the new behavior (if this is a feature change)?
If a contingency isolates a bus that is connected to a fictive load and an HVDC station, the HVDC is is stopped.
Does this PR introduce a breaking change or deprecate an API?
If yes, please check if the following requirements are fulfilled
What changes might users need to make in their application due to this PR? (migration steps)
Other information: