IIDM ‐ XIIDM ‐ JIIDM 1.17 evolutions

Features

DC switches with resistance

Resistance of breakers are essential to analyze losses as well as security in AC/DC load flow analyses. For this purpose, the v1.17 IIDM version introduces a new r attribute on the switches of the DC model.
By default, its value is set to 0.0.
This attribute is shared between the network's variants.

Permanent limit names

The v1.17 IIDM version introduces a new permanentLimitName attribute to the operational limits. By default it is set to permanent and in that case, it is not exported in the X/J/BIIDM file.
This attribute is especially useful when several limits groups are active on the same equipment and side.

Default attribute values

Starting from this IIDM version, some attributes are no more serialized in the IIDM files when they are set to their default value:

Type	Attribute	Changed to
Line	g1, g2, b1, b2	optional default 0
TwoWindingsTransformer	g, b	optional default 0
ThreeWindingsTransformer	g1, g2, g3, b1, b2, b3	optional default 0
RatioTapChanger, PhaseTapChanger	lowTapPosition	optional default 0
RatioTapChangerStep	r, x, g, b	optional default 0
PhaseTapChangerStep	r, x, g, b	optional default 0
Switch	retained	optional default false
OperationalLimitsGroup	permanentLimitName	optional default 'permanent'