Update to Campus Microgrid Examples

The following are the updates: 1) Added documentation to both Campus A and Campus B microgrid examples. 2) Added description to all component, models, and examples from the Microgrids Example Package. 3) Added turbine governor model for the generation units for Microgrid A. 4) Added generation unit parameter records to the generation units from Microgrid B. This way, both microgrid A and B have the same parameter record structure. 5) Added two papers to "Publications" that are linked to the developed university campus microgrids. 6) Added new ES models. 7) Fixed M_b issue in the PV model.
ALSETLab · Nov 14, 2024 · b0bc9c2 · b0bc9c2
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diff --git a/OpenIPSL/Data/PowerPlant/GenerationGroup/Generator1.mo b/OpenIPSL/Data/PowerPlant/GenerationGroup/Generator1.mo
@@ -130,8 +130,7 @@ equation
           fillPattern=FillPattern.Solid,
           textString="%name"),
                          Line(points={{-60,-20},{-20,20},{20,-20},{60,20}},
-          color={28,108,200}),Ellipse(extent={{-100,-100},{100,100}}, lineColor
-            =
+          color={28,108,200}),Ellipse(extent={{-100,-100},{100,100}}, lineColor=
            {28,108,200})}),
     Documentation(info="<html>
 <p>Generation group for the example that uses the IEEE421.5-based data set.</p>

diff --git a/OpenIPSL/Data/PowerPlant/GenerationGroup/Generator2.mo b/OpenIPSL/Data/PowerPlant/GenerationGroup/Generator2.mo
@@ -127,8 +127,7 @@ equation
           fillPattern=FillPattern.Solid,
           textString="%name"),
                          Line(points={{-60,-20},{-20,20},{20,-20},{60,20}},
-          color={28,108,200}),Ellipse(extent={{-100,-100},{100,100}}, lineColor
-            =
+          color={28,108,200}),Ellipse(extent={{-100,-100},{100,100}}, lineColor=
            {28,108,200})}),
     Documentation(info="<html>
 <p>Generation Group for the example that uses the Anderson-based data set.</p>

diff --git a/OpenIPSL/Electrical/Controls/PSSE/ES/BaseClasses/PID_No_Windup.mo b/OpenIPSL/Electrical/Controls/PSSE/ES/BaseClasses/PID_No_Windup.mo
@@ -0,0 +1,80 @@
+within OpenIPSL.Electrical.Controls.PSSE.ES.BaseClasses;
+model PID_No_Windup
+  import Modelica.Units.SI;
+  parameter SI.PerUnit K_PR "Voltage regulator proportional gain (pu)";
+  parameter SI.TimeAging K_IR "Voltage regulator integral gain (pu)";
+  parameter SI.PerUnit K_DR "Voltage regulator derivative gain (pu)";
+  parameter SI.Time T_DR "Voltage regulator derivative channel time constant (sec)";
+  parameter SI.PerUnit V_RMAX "Maximum regulator output (pu)";
+  parameter SI.PerUnit V_RMIN "Minimum regulator output (pu)";
+  parameter Real VR0;
+  Modelica.Blocks.Continuous.Integrator    integral(
+    k=K_IR,
+    use_reset=false,
+    initType=Modelica.Blocks.Types.Init.InitialOutput,
+    y_start=VR0)
+    annotation (Placement(transformation(extent={{-44,30},{-24,50}})));
+  Modelica.Blocks.Math.Gain proportional(k=K_PR)
+    annotation (Placement(transformation(extent={{-42,-10},{-22,10}})));
+  Modelica.Blocks.Math.Gain gain1(k=K_DR*kd)
+    annotation (Placement(transformation(extent={{-40,-44},{-20,-24}})));
+  Modelica.Blocks.Math.Add3 PID_add
+    annotation (Placement(transformation(extent={{32,-10},{52,10}})));
+  Modelica.Blocks.Math.Add derivative_add(k2=-1)
+    annotation (Placement(transformation(extent={{-2,-50},{18,-30}})));
+  Modelica.Blocks.Interfaces.RealInput u
+    annotation (Placement(transformation(extent={{-160,-20},{-120,20}})));
+  Modelica.Blocks.Interfaces.RealOutput y
+    annotation (Placement(transformation(extent={{100,-10},{120,10}})));
+  Modelica.Blocks.Continuous.Integrator derivative(initType=Modelica.Blocks.Types.Init.InitialOutput,
+      y_start=0)
+    annotation (Placement(transformation(extent={{-42,-80},{-22,-60}})));
+  Modelica.Blocks.Math.Gain gain2(k=kd)
+    annotation (Placement(transformation(extent={{-80,-80},{-60,-60}})));
+  Modelica.Blocks.Nonlinear.Limiter limiter(uMax=V_RMAX, uMin=V_RMIN)
+    annotation (Placement(transformation(extent={{68,-10},{88,10}})));
+  Modelica.Blocks.Logical.Switch reset_switch
+    annotation (Placement(transformation(extent={{-82,30},{-62,50}})));
+  Modelica.Blocks.Sources.RealExpression realExpression
+    annotation (Placement(transformation(extent={{-116,38},{-96,58}})));
+protected
+  parameter Real kd = if T_DR <= Modelica.Constants.eps then 1 else 1/T_DR;
+equation
+  reset_switch.u2 =
+  if (abs(V_RMAX - y) <= Modelica.Constants.eps and der(integral.y)>0) then true
+  else if (abs(V_RMIN - y) <= Modelica.Constants.eps and der(integral.y)<0) then true
+  else false;
+  connect(integral.y, PID_add.u1)
+    annotation (Line(points={{-23,40},{6,40},{6,8},{30,8}}, color={0,0,127}));
+  connect(proportional.y, PID_add.u2)
+    annotation (Line(points={{-21,0},{30,0}}, color={0,0,127}));
+  connect(gain1.y, derivative_add.u1)
+    annotation (Line(points={{-19,-34},{-4,-34}}, color={0,0,127}));
+  connect(derivative.y, derivative_add.u2) annotation (Line(points={{-21,-70},{-12,
+          -70},{-12,-46},{-4,-46}}, color={0,0,127}));
+  connect(gain2.y,derivative. u)
+    annotation (Line(points={{-59,-70},{-44,-70}}, color={0,0,127}));
+  connect(y, limiter.y)
+    annotation (Line(points={{110,0},{89,0}}, color={0,0,127}));
+  connect(PID_add.y, limiter.u)
+    annotation (Line(points={{53,0},{60,0},{60,0},{66,0}}, color={0,0,127}));
+  connect(reset_switch.u1, realExpression.y)
+    annotation (Line(points={{-84,48},{-95,48}}, color={0,0,127}));
+  connect(reset_switch.u3, u) annotation (Line(points={{-84,32},{-96,32},{-96,0},
+          {-140,0}}, color={0,0,127}));
+  connect(reset_switch.y, integral.u)
+    annotation (Line(points={{-61,40},{-46,40}}, color={0,0,127}));
+  connect(proportional.u, u)
+    annotation (Line(points={{-44,0},{-140,0}}, color={0,0,127}));
+  connect(gain1.u, u) annotation (Line(points={{-42,-34},{-96,-34},{-96,0},{-140,
+          0}}, color={0,0,127}));
+  connect(derivative_add.y, PID_add.u3) annotation (Line(points={{19,-40},{24,-40},
+          {24,-8},{30,-8}}, color={0,0,127}));
+  connect(gain2.u, PID_add.u3) annotation (Line(points={{-82,-70},{-90,-70},{-90,
+          -90},{24,-90},{24,-8},{30,-8}}, color={0,0,127}));
+  annotation (
+    Icon(coordinateSystem(preserveAspectRatio=false, extent={{-120,-100},{100,60}})),
+    Diagram(coordinateSystem(preserveAspectRatio=false, extent={{-120,-100},{100,
+            60}})),
+    conversion(noneFromVersion=""));
+end PID_No_Windup;
diff --git a/OpenIPSL/Electrical/Controls/PSSE/ES/BaseClasses/PI_No_Windup.mo b/OpenIPSL/Electrical/Controls/PSSE/ES/BaseClasses/PI_No_Windup.mo
@@ -0,0 +1,55 @@
+within OpenIPSL.Electrical.Controls.PSSE.ES.BaseClasses;
+model PI_No_Windup
+  import Modelica.Units.SI;
+  parameter SI.PerUnit K_P "Voltage regulator proportional gain (pu)";
+  parameter SI.TimeAging K_I "Voltage regulator integral gain (pu)";
+  parameter SI.PerUnit V_RMAX "Maximum regulator output (pu)";
+  parameter SI.PerUnit V_RMIN "Minimum regulator output (pu)";
+  parameter Real y_start;
+  Modelica.Blocks.Continuous.Integrator    integral(
+    k=K_I,
+    use_reset=false,
+    initType=Modelica.Blocks.Types.Init.InitialOutput,
+    y_start=y_start)
+    annotation (Placement(transformation(extent={{-18,30},{2,50}})));
+  Modelica.Blocks.Math.Gain proportional(k=K_P)
+    annotation (Placement(transformation(extent={{-26,-50},{-6,-30}})));
+  Modelica.Blocks.Math.Add PI_add
+    annotation (Placement(transformation(extent={{38,-10},{58,10}})));
+  Modelica.Blocks.Nonlinear.Limiter limiter(uMax=V_RMAX, uMin=V_RMIN)
+    annotation (Placement(transformation(extent={{68,-10},{88,10}})));
+  Modelica.Blocks.Logical.Switch reset_switch
+    annotation (Placement(transformation(extent={{-56,30},{-36,50}})));
+  Modelica.Blocks.Sources.RealExpression realExpression
+    annotation (Placement(transformation(extent={{-90,38},{-70,58}})));
+  Modelica.Blocks.Interfaces.RealInput u
+    annotation (Placement(transformation(extent={{-140,-20},{-100,20}})));
+  Modelica.Blocks.Interfaces.RealOutput y
+    annotation (Placement(transformation(extent={{100,-10},{120,10}})));
+equation
+  reset_switch.u2 =
+  if (abs(V_RMAX - y) <= Modelica.Constants.eps and der(integral.y)>0) then true
+  else if (abs(V_RMIN - y) <= Modelica.Constants.eps and der(integral.y)<0) then true
+  else false;
+  connect(integral.y, PI_add.u1) annotation (Line(points={{3,40},{30,40},{30,6},
+          {36,6}}, color={0,0,127}));
+  connect(proportional.y, PI_add.u2) annotation (Line(points={{-5,-40},{30,-40},
+          {30,-6},{36,-6}}, color={0,0,127}));
+  connect(y,limiter. y)
+    annotation (Line(points={{110,0},{89,0}}, color={0,0,127}));
+  connect(PI_add.y, limiter.u)
+    annotation (Line(points={{59,0},{66,0}}, color={0,0,127}));
+  connect(reset_switch.u1,realExpression. y)
+    annotation (Line(points={{-58,48},{-69,48}}, color={0,0,127}));
+  connect(reset_switch.u3,u)  annotation (Line(points={{-58,32},{-70,32},{-70,0},
+          {-120,0}}, color={0,0,127}));
+  connect(reset_switch.y,integral. u)
+    annotation (Line(points={{-35,40},{-20,40}}, color={0,0,127}));
+  connect(proportional.u,u)
+    annotation (Line(points={{-28,-40},{-70,-40},{-70,0},{-120,0}},
+                                                color={0,0,127}));
+  annotation (
+    Icon(coordinateSystem(preserveAspectRatio=false, extent={{-120,-100},{100,100}})),
+    Diagram(coordinateSystem(preserveAspectRatio=false, extent={{-100,-100},{
+            100,100}})));
+end PI_No_Windup;
diff --git a/OpenIPSL/Electrical/Controls/PSSE/ES/BaseClasses/package.order b/OpenIPSL/Electrical/Controls/PSSE/ES/BaseClasses/package.order
@@ -9,3 +9,5 @@ RectifierCommutationVoltageDrop
 calculate_dc_exciter_params
 RotatingExciterBase
 invFEX
+PID_No_Windup
+PI_No_Windup
diff --git a/OpenIPSL/Electrical/Controls/PSSE/ES/ESST2A.mo b/OpenIPSL/Electrical/Controls/PSSE/ES/ESST2A.mo
@@ -0,0 +1,224 @@
+within OpenIPSL.Electrical.Controls.PSSE.ES;
+model ESST2A "ST2A Excitation System [IEEE2005]"
+  extends OpenIPSL.Electrical.Controls.PSSE.ES.BaseClasses.BaseExciter;
+  import Modelica.ComplexMath.j;
+  import 'abs' =
+         Modelica.ComplexMath.abs;
+  parameter OpenIPSL.Types.Time T_R=0.01 "Regulator input filter time constant";
+  parameter OpenIPSL.Types.PerUnit V_RMAX=4.5 "Maximum regulator output";
+  parameter OpenIPSL.Types.PerUnit V_RMIN=-4.5 "Minimum regulator output";
+  parameter OpenIPSL.Types.PerUnit K_A=240 "Voltage regulator gain";
+  parameter OpenIPSL.Types.Time T_A=0.01 "Voltage regulator time constant";
+  parameter OpenIPSL.Types.PerUnit K_P=0.7
+    "Potential circuit (voltage) gain coefficient";
+  parameter OpenIPSL.Types.PerUnit K_I=1
+    "Compound circuit (current) gain coefficient";
+  parameter OpenIPSL.Types.PerUnit K_C=0.03
+    "Rectifier loading factor proportional to commutating reactance";
+  parameter OpenIPSL.Types.PerUnit K_F=0.05 "Rate feedback gain";
+  parameter OpenIPSL.Types.Time T_F=0.7 "Rate feedback time constant";
+  parameter Real K_E=1 "Excitation power source output gain";
+  parameter Real T_E=0.5 "Excitation power source output time constant";
+  parameter OpenIPSL.Types.PerUnit EFD_MAX=5 "Maximum exciter output";
+  Modelica.Blocks.Math.Product product
+    annotation (Placement(transformation(extent={{54,-16},{74,4}})));
+  OpenIPSL.Interfaces.PwPin Gen_terminal annotation (Placement(transformation(
+          extent={{-180,120},{-160,140}}), iconTransformation(extent={{-100,70},{-80,90}})));
+  OpenIPSL.Interfaces.PwPin Bus annotation (Placement(transformation(extent={{180,120},{200,140}}),
+                                  iconTransformation(extent={{80,70},{100,90}})));
+  Modelica.Blocks.Math.Add3 add3_1(k3=-1)
+    annotation (Placement(transformation(extent={{-60,-8},{-40,12}})));
+  OpenIPSL.NonElectrical.Continuous.SimpleLag TransducerDelay(
+    K=1,
+    T=T_R,
+    y_start=ECOMP0)
+    annotation (Placement(transformation(extent={{-170,-10},{-150,10}})));
+  OpenIPSL.Electrical.Controls.PSSE.ES.BaseClasses.RectifierCommutationVoltageDrop
+    rectifierCommutationVoltageDrop(K_C=K_C)
+    annotation (Placement(transformation(extent={{-48,-142},{-28,-122}})));
+  Modelica.Blocks.Continuous.Derivative imDerivativeLag(
+    y_start=0,
+    k=K_F,
+    T=T_F,
+    initType=Modelica.Blocks.Types.Init.InitialOutput,
+    x_start=0)
+    annotation (Placement(transformation(extent={{62,-62},{42,-42}})));
+  OpenIPSL.NonElectrical.Logical.HV_GATE hV_GATE
+    annotation (Placement(transformation(extent={{-20.7,-5.5},{2,6}})));
+  OpenIPSL.NonElectrical.Continuous.SimpleLagLim simpleLagLim(
+    K=K_A,
+    T=T_A,
+    y_start=VA0,
+    outMax=V_RMAX,
+    outMin=V_RMIN)
+    annotation (Placement(transformation(extent={{16,-10},{36,10}})));
+  Modelica.Blocks.Math.Feedback feedback
+    annotation (Placement(transformation(extent={{88,4},{108,-16}})));
+  Modelica.Blocks.Math.Gain gain(k=K_E) annotation (Placement(transformation(
+        extent={{-10,-10},{10,10}},
+        rotation=180,
+        origin={136,60})));
+  Modelica.Blocks.Math.Add add1
+    annotation (Placement(transformation(extent={{-108,36},{-88,56}})));
+  Modelica.Blocks.Sources.Constant vB_default(k=1)
+    annotation (Placement(transformation(extent={{-54,-80},{-34,-60}})));
+  Modelica.Blocks.Sources.BooleanConstant
+                                  booleanConstant(k=bypass_vb)
+    annotation (Placement(transformation(extent={{-80,-109},{-58,-86}})));
+  Modelica.Blocks.Logical.Switch swith_vb
+    annotation (Placement(transformation(extent={{-2,-107},{18,-88}})));
+  OpenIPSL.NonElectrical.Continuous.IntegratorLimVar integratorLimVar(K=1/T_E,
+      y_start=Efd0)
+    annotation (Placement(transformation(extent={{128,-16},{148,4}})));
+  Modelica.Blocks.Sources.Constant MaxOutput(k=EFD_MAX)
+    annotation (Placement(transformation(extent={{108,18},{128,38}})));
+  Modelica.Blocks.Sources.Constant MinOutput(k=0)
+    annotation (Placement(transformation(extent={{92,-42},{112,-22}})));
+protected
+  Modelica.Blocks.Interfaces.RealOutput VE
+    annotation (Placement(transformation(extent={{-76,-142},{-56,-122}})));
+  Complex V_T;
+  Complex I_T;
+  parameter Real Ifd0(fixed=false);
+  parameter Real IN0(fixed=false);
+  parameter Real VB0(fixed=false);
+  parameter Real VA0(fixed=false);
+  parameter Real VE0(fixed=false);
+  parameter Boolean bypass_vb(fixed=false);
+initial equation
+  Ifd0 = XADIFD;
+  VE0 = VE;
+  IN0 = K_C*Ifd0/VE0;
+  if K_P == 0 and K_I == 0 then
+    bypass_vb = true;
+    VB0 = 1;
+  else
+    bypass_vb = false;
+    if IN0 <= 0 then
+      VB0 = VE0*1;
+    elseif IN0 > 0 and IN0 <= 0.433 then
+      VB0 = VE0*(1 - 0.577*IN0);
+    elseif IN0 > 0.433 and IN0 < 0.75 then
+      VB0 = VE0*sqrt(0.75 - IN0^2);
+    elseif IN0 >= 0.75 and IN0 <= 1 then
+      VB0 = VE0*1.732*(1 - IN0);
+    else
+      VB0 = VE0*0;
+    end if;
+  end if;
+//   VA0 = if abs(VB0) < Modelica.Constants.eps then 0 else Efd0*(K_E)/(VB0);
+  VA0 = Efd0*(K_E)/(VB0);
+  V_REF = ECOMP0 + VA0/K_A;
+
+equation
+  if K_P == 0 and K_I == 0 then
+    VE = 1;
+  else
+    VE = 'abs'(K_P*V_T + j*K_I*I_T);
+  end if;
+  V_T = Gen_terminal.vr + j*Gen_terminal.vi;
+  I_T = Gen_terminal.ir + j*Gen_terminal.ii;
+  connect(ECOMP, TransducerDelay.u)
+    annotation (Line(points={{-200,0},{-172,0},{-172,0}}, color={0,0,127}));
+  connect(TransducerDelay.y, DiffV.u2) annotation (Line(points={{-149,0},{-132,
+          0},{-132,-6},{-122,-6}}, color={0,0,127}));
+  connect(DiffV.y, add3_1.u2)
+    annotation (Line(points={{-99,0},{-96,0},{-96,2},{-62,2}},
+                                                       color={0,0,127}));
+  connect(VE, rectifierCommutationVoltageDrop.V_EX)
+    annotation (Line(points={{-66,-132},{-49,-132}},
+                                                   color={0,0,127}));
+  connect(Gen_terminal, Bus) annotation (Line(points={{-170,130},{190,130}},
+                 color={0,0,255}));
+  connect(XADIFD, rectifierCommutationVoltageDrop.XADIFD) annotation (Line(points={{80,-200},
+          {80,-160},{-38,-160},{-38,-143}},                                                                                  color={0,0,127}));
+  connect(imDerivativeLag.y, add3_1.u3) annotation (Line(points={{41,-52},{-76,-52},
+          {-76,-6},{-62,-6}},      color={0,0,127}));
+  connect(simpleLagLim.y, product.u1)
+    annotation (Line(points={{37,0},{52,0}}, color={0,0,127}));
+  connect(feedback.u1, product.y)
+    annotation (Line(points={{90,-6},{75,-6}}, color={0,0,127}));
+  connect(gain.y, feedback.u2)
+    annotation (Line(points={{125,60},{98,60},{98,2}},     color={0,0,127}));
+  connect(gain.u, EFD) annotation (Line(points={{148,60},{188,60},{188,0},{
+          210,0}}, color={0,0,127}));
+  connect(imDerivativeLag.u, EFD) annotation (Line(points={{64,-52},{180,-52},{180,
+          0},{210,0}},                          color={0,0,127}));
+  connect(VOTHSG, add1.u1) annotation (Line(points={{-200,90},{-120,90},{-120,52},
+          {-110,52},{-110,52}}, color={0,0,127}));
+  connect(VOEL, add1.u2) annotation (Line(points={{-70,-200},{-70,-160},{-100,-160},
+          {-100,-32},{-90,-32},{-90,24},{-120,24},{-120,40},{-110,40}}, color={0,
+          0,127}));
+  connect(add1.y, add3_1.u1) annotation (Line(points={{-87,46},{-74,46},{-74,10},
+          {-62,10}}, color={0,0,127}));
+  connect(booleanConstant.y, swith_vb.u2)
+    annotation (Line(points={{-56.9,-97.5},{-4,-97.5}}, color={255,0,255}));
+  connect(swith_vb.y, product.u2) annotation (Line(points={{19,-97.5},{34,-97.5},
+          {34,-22},{44,-22},{44,-12},{52,-12}}, color={0,0,127}));
+  connect(feedback.y, integratorLimVar.u)
+    annotation (Line(points={{107,-6},{126,-6}}, color={0,0,127}));
+  connect(integratorLimVar.y, EFD) annotation (Line(points={{149,-6},{162,-6},
+          {162,0},{210,0}}, color={0,0,127}));
+  connect(MaxOutput.y, integratorLimVar.outMax)
+    annotation (Line(points={{129,28},{146,28},{146,8}}, color={0,0,127}));
+  connect(MinOutput.y, integratorLimVar.outMin) annotation (Line(points={{113,
+          -32},{130,-32},{130,-20}}, color={0,0,127}));
+  connect(add3_1.y, hV_GATE.u1) annotation (Line(points={{-39,2},{-39,3.7},{-22.97,
+          3.7}}, color={0,0,127}));
+  connect(VUEL, hV_GATE.u2) annotation (Line(points={{-130,-200},{-130,-26},{-30,
+          -26},{-30,-3.2},{-22.97,-3.2}}, color={0,0,127}));
+  connect(hV_GATE.y, simpleLagLim.u) annotation (Line(points={{3.135,0.25},{8.5675,
+          0.25},{8.5675,0},{14,0}}, color={0,0,127}));
+  connect(rectifierCommutationVoltageDrop.EFD, swith_vb.u3) annotation (Line(
+        points={{-27,-132},{-12,-132},{-12,-105.1},{-4,-105.1}}, color={0,0,127}));
+  connect(vB_default.y, swith_vb.u1)
+    annotation (Line(points={{-33,-70},{-4,-70},{-4,-89.9}}, color={0,0,127}));
+  annotation (
+    Diagram(coordinateSystem(extent={{-180,-180},{200,140}}),
+        graphics={Text(
+          extent={{4,-32},{28,-46}},
+          lineColor={255,0,0},
+          textString="VB"),
+                  Text(
+          extent={{42,56},{66,42}},
+          lineColor={255,0,0},
+          textString="VR"),
+                  Text(
+          extent={{-74,48},{-50,34}},
+          lineColor={255,0,0},
+          textString="VS")}),
+    Icon(coordinateSystem(extent={{-100,-100},{100,100}}),
+        graphics={Text(
+          extent={{-80,90},{-20,70}},
+          lineColor={0,0,255},
+          textString="GenT"),  Text(
+          extent={{-100,160},{100,100}},
+          lineColor={28,108,200},
+          textString="ESST2A"),
+                  Text(
+          extent={{40,90},{80,70}},
+          lineColor={0,0,255},
+          textString="Bus")}),
+    Documentation(info="<html>
+<p>IEEE Type ST2A Excitation System Model.</p>
+</html>",
+  revisions="<html><table cellspacing=\"1\" cellpadding=\"1\" border=\"1\">
+<tr>
+<td><p>Reference</p></td>
+<td>PSS&reg;E Manual</td>
+</tr>
+<tr>
+<td><p>Last update</p></td>
+<td><p>2022-12</p></td>
+</tr>
+<tr>
+<td><p>Author</p></td>
+<td><p>ALSETLab, Rensselaer Polytechnic Institute</p></td>
+</tr>
+<tr>
+<td><p>Contact</p></td>
+<td><p>see <a href=\"modelica://OpenIPSL.UsersGuide.Contact\">UsersGuide.Contact</a></p></td>
+</tr>
+</table>
+</html>"));
+end ESST2A;
diff --git a/OpenIPSL/Electrical/Controls/PSSE/ES/package.order b/OpenIPSL/Electrical/Controls/PSSE/ES/package.order
@@ -7,6 +7,7 @@ ESAC2A
 ESDC1A
 ESDC2A
 ESST1A
+ESST2A
 ESST4B
 ESURRY
 EXAC1