diff --git a/model/ddl.sql b/model/ddl.sql
index b25bd02..3b1e520 100644
--- a/model/ddl.sql
+++ b/model/ddl.sql
@@ -90,6 +90,7 @@ CREATE TABLE PUBLIC.COMPONENT (
     GRID VARCHAR(64) NOT NULL DEFAULT '',
     ZONE VARCHAR(64) NOT NULL DEFAULT '',
     STATION VARCHAR(64) NOT NULL DEFAULT '',
+    STATION_ID BIGINT NOT NULL,
     TYPE INTEGER NOT NULL DEFAULT -1,
     IN_SERVICE BOOLEAN NOT NULL DEFAULT FALSE,
     STATE INTEGER NOT NULL DEFAULT -1,
@@ -100,7 +101,9 @@ CREATE TABLE PUBLIC.COMPONENT (
     OP INTEGER NOT NULL DEFAULT -1,
     TS TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
 
-    UNIQUE (TAG) 
+    UNIQUE (TAG), 
+
+    FOREIGN KEY (STATION_ID) REFERENCES PUBLIC.STATION (ID)
 );
 
 CREATE TABLE PUBLIC.TOPOLOGIC (