diff --git a/powerfactory/powerfactory-converter/src/main/java/com/powsybl/powerfactory/converter/ContainersMappingHelper.java b/powerfactory/powerfactory-converter/src/main/java/com/powsybl/powerfactory/converter/ContainersMappingHelper.java
index bde9226226b..966f77e2970 100644
--- a/powerfactory/powerfactory-converter/src/main/java/com/powsybl/powerfactory/converter/ContainersMappingHelper.java
+++ b/powerfactory/powerfactory-converter/src/main/java/com/powsybl/powerfactory/converter/ContainersMappingHelper.java
@@ -93,7 +93,10 @@ private String getPowerFactorySubstationId(Set<Integer> ids) {
 
             Set<DataObject> elmTerms = elmTermsAssociatedTo(ids);
             Set<DataObject> elmSubstats = elmSubstatsAssociatedTo(elmTerms);
+            Set<DataObject> elmTrfstats = elmTrfstatsAssociatedTo(elmTerms);
+
             Set<DataObject> elmSites = elmSitesAssociatedTo(elmSubstats);
+            elmSites.addAll(elmSitesAssociatedTo(elmTrfstats));
 
             if (elmSites.size() != 1) {
                 return null;
@@ -107,22 +110,38 @@ private String getPowerFactorySubstationId(Set<Integer> ids) {
             return elmSubstats.equals(dataObjects) ? elmSite.getLocName() : null;
         }
 
-        // Find an ElmSubstat with same ElmTerms (Nodes) as defined by the ids argument
+        // Find an ElmSubstat or an ElmTrfstat with same ElmTerms (Nodes) as defined by the ids argument
         private String getPowerFactoryVoltageLevelId(Set<Integer> ids) {
 
             Set<DataObject> elmTerms = elmTermsAssociatedTo(ids);
             Set<DataObject> elmSubstats = elmSubstatsAssociatedTo(elmTerms);
 
-            if (elmSubstats.size() != 1) {
-                return null;
+            if (elmSubstats.size() == 1) {
+                DataObject elmSubstat = elmSubstats.iterator().next();
+
+                Set<DataObject> dataObjects = elmSubstat.getChildren().stream()
+                    .filter(dataObject -> dataObject.getDataClassName().equals(DataAttributeNames.ELMTERM))
+                    .collect(Collectors.toSet());
+
+                if (elmTerms.equals(dataObjects)) {
+                    return elmSubstat.getLocName();
+                }
             }
-            DataObject elmSubstat = elmSubstats.iterator().next();
 
-            Set<DataObject> dataObjects = elmSubstat.getChildren().stream()
-                .filter(dataObject -> dataObject.getDataClassName().equals(DataAttributeNames.ELMTERM))
-                .collect(Collectors.toSet());
+            Set<DataObject> elmTrfstats = elmTrfstatsAssociatedTo(elmTerms);
+            if (elmTrfstats.size() == 1) {
+                DataObject elmTrfstat = elmTrfstats.iterator().next();
+
+                Set<DataObject> dataObjects = elmTrfstat.getChildren().stream()
+                    .filter(dataObject -> dataObject.getDataClassName().equals(DataAttributeNames.ELMTERM))
+                    .collect(Collectors.toSet());
 
-            return elmTerms.equals(dataObjects) ? elmSubstat.getLocName() : null;
+                if (elmTerms.equals(dataObjects)) {
+                    return elmTrfstat.getLocName();
+                }
+            }
+
+            return null;
         }
 
         private Set<DataObject> elmTermsAssociatedTo(Set<Integer> ids) {
@@ -132,12 +151,19 @@ private Set<DataObject> elmTermsAssociatedTo(Set<Integer> ids) {
                 .collect(Collectors.toSet());
         }
 
+        private Set<DataObject> elmTrfstatsAssociatedTo(Set<DataObject> elmTerms) {
+            return elmTerms.stream().map(DataObject::getParent)
+                .filter(dataObject -> dataObject.getDataClassName().equals(DataAttributeNames.ELMTRFSTAT))
+                .collect(Collectors.toSet());
+        }
+
         private Set<DataObject> elmSubstatsAssociatedTo(Set<DataObject> elmTerms) {
             return elmTerms.stream().map(DataObject::getParent)
                 .filter(dataObject -> dataObject.getDataClassName().equals(DataAttributeNames.ELMSUBSTAT))
                 .collect(Collectors.toSet());
         }
 
+        // valid for elmSubstats and elmTrfstats
         private Set<DataObject> elmSitesAssociatedTo(Set<DataObject> elmSubstats) {
             return elmSubstats.stream().map(DataObject::getParent)
                 .filter(dataObject -> dataObject.getDataClassName().equals(DataAttributeNames.ELMSITE))
diff --git a/powerfactory/powerfactory-converter/src/main/java/com/powsybl/powerfactory/converter/DataAttributeNames.java b/powerfactory/powerfactory-converter/src/main/java/com/powsybl/powerfactory/converter/DataAttributeNames.java
index 548cdbebabc..76cc0c20863 100644
--- a/powerfactory/powerfactory-converter/src/main/java/com/powsybl/powerfactory/converter/DataAttributeNames.java
+++ b/powerfactory/powerfactory-converter/src/main/java/com/powsybl/powerfactory/converter/DataAttributeNames.java
@@ -19,6 +19,7 @@ private DataAttributeNames() {
 
     static final String TYP_ID = "typ_id";
     static final String ELMTERM = "ElmTerm";
+    static final String ELMTRFSTAT = "ElmTrfstat";
     static final String ELMSUBSTAT = "ElmSubstat";
     static final String ELMSITE = "ElmSite";
     static final String OBJ_ID = "obj_id";
diff --git a/powerfactory/powerfactory-converter/src/test/resources/VoltageLevelsAndSubstations.dgs b/powerfactory/powerfactory-converter/src/test/resources/VoltageLevelsAndSubstations.dgs
index 164b84fee98..6ae6c3f66d0 100644
--- a/powerfactory/powerfactory-converter/src/test/resources/VoltageLevelsAndSubstations.dgs
+++ b/powerfactory/powerfactory-converter/src/test/resources/VoltageLevelsAndSubstations.dgs
@@ -78,8 +78,10 @@ $$TypTr2;ID(a:40);loc_name(a:40);for_name(a:50);fold_id(p);nt2ph(i);strn(r);frno
 $$ElmSubstat;ID(a:40);loc_name(a:40);for_name(a:50);fold_id(p);sShort(a:6);sType(a:80);GPSlat(r);GPSlon(r)
   31;VoltageLevel1-400;;34;;;49,95646302;11,45051847
   32;VoltageLevel2-400;;35;;;49,95646302;11,45051847
-  33;VoltageLevel2-20;;35;;;49,95646302;11,45051847
-  
+
+$$ElmTrfstat;ID(a:40);loc_name(a:40);for_name(a:50);fold_id(p)
+  33;VoltageLevel2-20;;35
+
 $$ElmSite;ID(a:40);loc_name(a:40);for_name(a:50);fold_id(p);sType(a:80);GPSlat(r);GPSlon(r)
   34;Substation1;;8;;49,95646302;11,45051847
   35;Substation2;;8;;50,89789337;11,01545826