diff --git a/Compiler/BackEnd/BackendDAEOptimize.mo b/Compiler/BackEnd/BackendDAEOptimize.mo
index dfc445b4081..a832dde8a3d 100644
--- a/Compiler/BackEnd/BackendDAEOptimize.mo
+++ b/Compiler/BackEnd/BackendDAEOptimize.mo
@@ -3991,6 +3991,109 @@ algorithm
   end matchcontinue;
 end updateStatesVars;
 
+// =============================================================================
+// section for addedScaledVars
+//
+// =============================================================================
+
+public function addedScaledVars
+" added var_norm = var/nominal,
+  where var is state.
+"
+  input BackendDAE.BackendDAE inDAE;
+  output BackendDAE.BackendDAE outDAE;
+algorithm
+  outDAE := if Flags.isSet(Flags.ADD_SCALED_VARS) then
+              addedScaledVarsWork(inDAE)
+             else
+              inDAE;
+end addedScaledVars;
+
+protected function addedScaledVarsWork
+  input BackendDAE.BackendDAE inDAE;
+  output BackendDAE.BackendDAE outDAE;
+protected
+  list<BackendDAE.EqSystem> systlst;
+  list<BackendDAE.EqSystem> osystlst = {};
+  BackendDAE.EqSystem osyst;
+
+  Option<BackendDAE.IncidenceMatrix> m, mT;
+  BackendDAE.Variables vars;
+  BackendDAE.EquationArray eqns;
+  BackendDAE.Matching matching;
+  BackendDAE.StateSets stateSets;
+  BackendDAE.BaseClockPartitionKind partitionKind;
+
+  BackendDAE.Variables vars;
+  BackendDAE.Variables knvars;
+  list<BackendDAE.Var> varlst, kvarlst, lst_states, lst_inputs, lst_normv, lst_new_var = {};
+  BackendDAE.Var tmpv;
+  DAE.ComponentRef cref;
+  DAE.Exp norm, y_norm, y, lhs;
+  BackendDAE.Equation eqn;
+  BackendDAE.Shared oshared ;
+
+algorithm
+
+  BackendDAE.DAE(systlst, oshared) := inDAE;
+  BackendDAE.SHARED(knownVars=knvars) := oshared;
+  kvarlst := BackendVariable.varList(knvars);
+  lst_inputs := List.select(kvarlst, BackendVariable.isVarOnTopLevelAndInputNoDerInput);
+
+  for syst in systlst loop
+    BackendDAE.EQSYSTEM(vars, eqns, m, mT, matching, stateSets, partitionKind) := syst;
+    varlst := BackendVariable.varList(vars);
+    // get vars
+    lst_states := List.select(varlst, BackendVariable.isStateVar);
+    //BackendDump.printVarList(lst_states);
+    for v in lst_states loop
+      cref := BackendVariable.varCref(v);
+      tmpv := BackendVariable.createVar(cref, "__OMC$scaled_state");
+      y := Expression.crefExp(cref);
+      norm := BackendVariable.getVarNominalValue(v);
+      y_norm := Expression.expDiv(y,norm);
+      (y_norm,_) := ExpressionSimplify.simplify(y_norm);
+
+      // lhs
+        cref := BackendVariable.varCref(tmpv);
+        lhs := Expression.crefExp(cref);
+        eqn := BackendDAE.EQUATION(lhs, y_norm, DAE.emptyElementSource, BackendDAE.EQ_ATTR_DEFAULT_DYNAMIC);
+
+        //print("\n" + BackendDump.equationString(eqn));
+        eqns := BackendEquation.addEquation(eqn, eqns);
+        vars := BackendVariable.addVar(tmpv, vars);
+
+    end for;
+    osyst := BackendDAE.EQSYSTEM(vars, eqns, NONE(), NONE(), BackendDAE.NO_MATCHING(), stateSets, partitionKind);
+    osystlst := osyst::osystlst;
+  end for;
+
+  // inputs
+    //BackendDump.printVarList(lst_inputs);
+    for v in lst_inputs loop
+      cref := BackendVariable.varCref(v);
+      tmpv := BackendVariable.createVar(cref, "__OMC$scaled_input");
+      y := Expression.crefExp(cref);
+      norm := BackendVariable.getVarNominalValue(v);
+      y_norm := Expression.expDiv(y,norm);
+      (y_norm,_) := ExpressionSimplify.simplify(y_norm);
+      
+      // lhs
+        cref := BackendVariable.varCref(tmpv);
+        lhs := Expression.crefExp(cref);
+        eqn := BackendDAE.EQUATION(lhs, y_norm, DAE.emptyElementSource, BackendDAE.EQ_ATTR_DEFAULT_DYNAMIC);
+        //print("\n" + BackendDump.equationString(eqn));
+        
+        eqns := BackendEquation.addEquation(eqn, eqns);
+        vars := BackendVariable.addVar(tmpv, vars);
+      
+    end for;
+
+  outDAE := BackendDAE.DAE(osystlst, oshared);
+end addedScaledVarsWork;
+
+
+
 // =============================================================================
 // section for introduceDerAlias
 //
diff --git a/Compiler/BackEnd/BackendDAEUtil.mo b/Compiler/BackEnd/BackendDAEUtil.mo
index 7a66d928979..e9a5f369b51 100644
--- a/Compiler/BackEnd/BackendDAEUtil.mo
+++ b/Compiler/BackEnd/BackendDAEUtil.mo
@@ -7710,6 +7710,7 @@ algorithm
                         (SymbolicJacobian.inputDerivativesUsed, "inputDerivativesUsed", false),
                         (BackendDAEOptimize.simplifysemiLinear, "simplifysemiLinear", false),
                         (BackendDAEOptimize.removeConstants, "removeConstants", false),
+                        (BackendDAEOptimize.addedScaledVars, "addScaledVars", false),
                         (ExpressionSolve.solveSimpleEquations, "solveSimpleEquations", false),
                         (SymbolicJacobian.detectSparsePatternODE, "detectJacobianSparsePattern", false),
                         (Tearing.tearingSystem, "tearingSystem", false),
diff --git a/Compiler/BackEnd/BackendVariable.mo b/Compiler/BackEnd/BackendVariable.mo
index 0313b0db6b4..9ece24943cf 100644
--- a/Compiler/BackEnd/BackendVariable.mo
+++ b/Compiler/BackEnd/BackendVariable.mo
@@ -1673,6 +1673,19 @@ algorithm
                           NONE(), NONE(), DAE.NON_CONNECTOR(), DAE.NOT_INNER_OUTER(), false);
 end createAliasDerVar;
 
+public function createVar
+"Creates a  variable with <input> as cref"
+  input DAE.ComponentRef inCref;
+  input String prependStringCref;
+  output BackendDAE.Var outVar;
+protected
+  BackendDAE.Var var;
+  DAE.ComponentRef cr;
+algorithm
+  cr := ComponentReference.appendStringLastIdent(prependStringCref, inCref);
+  outVar := makeVar(cr);
+end createVar;
+
 public function createDummyVar
 "Creates variable with $dummy."
   output BackendDAE.Var outVar;
diff --git a/Compiler/Util/Flags.mo b/Compiler/Util/Flags.mo
index 968f62f3a55..64b86b95105 100644
--- a/Compiler/Util/Flags.mo
+++ b/Compiler/Util/Flags.mo
@@ -436,6 +436,9 @@ constant DebugFlag REDUCE_DYN_OPT = DEBUG_FLAG(133, "reduceDynOpt", false,
   Util.gettext("remove eqs which not need for the calculations of cost and constraints"));
 constant DebugFlag VISUAL_XML = DEBUG_FLAG(134, "visxml", false,
   Util.gettext("Outputs a xml-file that contains information for visualization."));
+constant DebugFlag ADD_SCALED_VARS = DEBUG_FLAG(135, "addScaledVars", false,
+  Util.gettext("Adds an alias equation var_nrom = var/nominal where var is state"));
+
 
 // This is a list of all debug flags, to keep track of which flags are used. A
 // flag can not be used unless it's in this list, and the list is checked at
@@ -576,7 +579,8 @@ constant list<DebugFlag> allDebugFlags = {
   CONSTJAC,
   EXTENDS_DYN_OPT,
   REDUCE_DYN_OPT,
-  VISUAL_XML
+  VISUAL_XML,
+  ADD_SCALED_VARS
 };
 
 public
@@ -733,6 +737,7 @@ constant ConfigFlag POST_OPT_MODULES = CONFIG_FLAG(16, "postOptModules",
     "constantLinearSystem",
     "simplifysemiLinear",
     "solveLinearSystem",
+    "addScaledVars",
     "removeSimpleEquations",
     "encapsulateWhenConditions",  // must called after remove simple equations
     "reshufflePost",