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IIDM ‐ XIIDM ‐ JIIDM 1.15 evolutions
The detailed DC model (that was introduced in IIDM v1.14) can now be serialized/deserialized starting from IIDM 1.15.
See the documentation here for details on this detailed DC model.
Here is the XIIDM serialization of a small DC model containing 2 DC nodes and a DC line between them:
<?xml version="1.0" encoding="UTF-8"?>
<iidm:network xmlns:iidm="http://www.powsybl.org/schema/iidm/1_15" id="dcLineTest" caseDate="2025-01-02T03:04:05.000+01:00" forecastDistance="0" sourceFormat="code" minimumValidationLevel="STEADY_STATE_HYPOTHESIS">
<iidm:dcNode id="dcNode1" nominalV="500.0"/>
<iidm:dcNode id="dcNode2" nominalV="500.0"/>
<iidm:dcLine id="dcLine" name="A DC Line" dcNode1="dcNode1" dcNode2="dcNode2" r="4.0" connected1="true" connected2="true" dcP1="100.0" dcI1="200.0" dcP2="-98.0" dcI2="-195.0"/>
</iidm:network>You can find more examples, with the different DC elements, here:
Note that these examples demonstrate only the IIDM serialization and are not suitable to perform computations.
Starting from this version, the generators have a new equivalentLocalTargetV attribute that is used to store the local voltage target consistent with the remote voltage target. This attribute is optional.
When present, the value can be used by simulators that deactivate the remote voltage algorithms, or by dynamic simulators that use this voltage as a starting value.
It is now possible to set AC/DC converters in Droop control mode, with multiple segments droop.
The droop control mode is use in post contingency loadflow, droop controlling converters introduce a linear relation between the steady-state deviation of DC voltage and the steady-state deviation of power setpoint. With multiple segments droop, the linear coefficient changes depending of the actual voltage of the converter.