Correct false friend "Aggregate" --> "unit"

dietmarw · dietmarw · commit e6ba5e3a2566 · 2024-10-30T12:37:09.000+01:00
diff --git a/OpenHPL/ElectroMech/BaseClasses/Power2Torque.mo b/OpenHPL/ElectroMech/BaseClasses/Power2Torque.mo
@@ -62,11 +62,11 @@ partial model Power2Torque "Converts a power signal to a torque in the rotationa
         rotation=180,
         origin={-50,0})));
   Modelica.Blocks.Interfaces.RealOutput f(unit="Hz")
-                                          if enable_f "Frequency output of the aggregate"
+                                          if enable_f "Frequency output of the unit"
     annotation (Placement(transformation(extent={{100,-50},{120,-30}}),
                 iconTransformation(extent={{100,-50},{120,-30}})));
   Modelica.Blocks.Interfaces.RealOutput w(unit="rad/s")
-                                          if enable_w "Angular velocity output of the aggregate"
+                                          if enable_w "Angular velocity output of the unit"
     annotation (Placement(transformation(extent={{100,30},{120,50}}),
       iconTransformation(extent={{100,30},{120,50}})));
 
@@ -80,7 +80,7 @@ partial model Power2Torque "Converts a power signal to a torque in the rotationa
   Modelica.Mechanics.Rotational.Components.IdealGear toSysSpeed(ratio=2/p) "Converts to system speed based on p = 2" annotation (Placement(transformation(extent={{24,-6},{36,6}})));
   Modelica.Blocks.Sources.RealExpression nominalSpeed(y=w_0*p/2) if enable_nomSpeed annotation (Placement(transformation(extent={{-12,-70},{8,-50}})));
   Modelica.Blocks.Interfaces.RealInput w_in if enable_w_in and not enable_nomSpeed
-                                            "Angular velocity input of the aggregate [pu]" annotation (Placement(transformation(
+                                            "Angular velocity input of the unit [pu]" annotation (Placement(transformation(
         extent={{-20,-20},{20,20}},
         rotation=90,
         origin={-80,-120})));
diff --git a/OpenHPL/ElectroMech/Generators/SimpleGen.mo b/OpenHPL/ElectroMech/Generators/SimpleGen.mo
@@ -18,7 +18,7 @@ model SimpleGen "Model of a simple generator with mechanical connectors"
 <h4>Simple model of an ideal generator with friction.</h4>
 
 <p>This model based on the angular momentum balance, which depends on the turbine shaft power,
- the friction loss in the aggregate rotation and the power taken up by the generator.</p>
+ the friction loss in the unit rotation and the power taken up by the generator.</p>
 <p>
 The generator can be loaded either:</p>
 <ul>
diff --git a/OpenHPL/Resources/Documents/UsersGuide_src/UsersGuide.tex b/OpenHPL/Resources/Documents/UsersGuide_src/UsersGuide.tex
@@ -917,7 +917,7 @@ \subsection{Pelton}
 
 \subsection{Simple Generator}
 
-Here, a simple model of an ideal generator with friction is considered. This model has inputs as electric power available on the grid and the turbine shaft power. This model is based on the angular momentum balance which depends on the turbine shaft power, the friction loss in the aggregate rotation, and the power taken up by the generator. The rotor angular velocity mainly depends on its inertia, internal friction and available power. The kinetic energy stored in the rotating generator is $ K_a=\frac{1}{2}J_a\omega_a^2$, where $\omega_a$ is the angular velocity of the rotor and $J_a$ is its moment of inertia. The kinetic energy $K_a$ is changed by the power terms operating on the generator axis, e.g., the turbine shaft power $\dot{W}_s$ produced by the turbine, friction power $\dot{W}_{f,a}$, and the power taken up by the generator, $\dot{W}_g$, \cite{LieL:18}, and from energy the balance can be expressed as follows:
+Here, a simple model of an ideal generator with friction is considered. This model has inputs as electric power available on the grid and the turbine shaft power. This model is based on the angular momentum balance which depends on the turbine shaft power, the friction loss in the unit rotation, and the power taken up by the generator. The rotor angular velocity mainly depends on its inertia, internal friction and available power. The kinetic energy stored in the rotating generator is $ K_a=\frac{1}{2}J_a\omega_a^2$, where $\omega_a$ is the angular velocity of the rotor and $J_a$ is its moment of inertia. The kinetic energy $K_a$ is changed by the power terms operating on the generator axis, e.g., the turbine shaft power $\dot{W}_s$ produced by the turbine, friction power $\dot{W}_{f,a}$, and the power taken up by the generator, $\dot{W}_g$, \cite{LieL:18}, and from energy the balance can be expressed as follows:
 \begin{equation}
 \frac{dK_a}{dt}=\dot{W}_s-\dot{W}_{f,a}-\dot{W}_g
 \end{equation}
diff --git a/OpenHPL/Resources/Images/simplegen.svg b/OpenHPL/Resources/Images/simplegen.svg
@@ -531,7 +531,7 @@
      scale-x="0.9" /><g
      id="g10"
      inkscape:groupmode="layer"
-     inkscape:label="powerLoadedAggregate"
+     inkscape:label="powerLoadedUnit"
      transform="matrix(1.3333333,0,0,-1.3333333,16.977251,118.88732)"><g
        id="g12"><g
          id="g14"
diff --git a/OpenHPL/Tests/HPElasticKPPenstock.mo b/OpenHPL/Tests/HPElasticKPPenstock.mo
@@ -27,12 +27,12 @@ model HPElasticKPPenstock "Model of HP system with elastic penctock (KP), but si
     p_p0=997*data.g*(penstockKP.h_s0 + penstockKP.H/penstockKP.N/2):997*data.g*penstockKP.H/penstockKP.N:997*data.g*(penstockKP.h_s0 + penstockKP.H/penstockKP.N*(penstockKP.N - 1/2))) annotation (Placement(transformation(extent={{-20,44},{0,64}})));
   Modelica.Blocks.Sources.Ramp load(duration = 1, height = -5e6, offset = 80e6, startTime = 600) annotation (
     Placement(transformation(extent = {{-22, 0}, {-2, 20}})));
-  ElectroMech.Generators.SimpleGen aggregate annotation (Placement(transformation(extent={{8,0},{28,20}})));
+  ElectroMech.Generators.SimpleGen unit annotation (Placement(transformation(extent={{8,0},{28,20}})));
 equation
   //19.077 * ones(10)
   //, H = 428.5, h_s0 = 69.9, N = 10, p_p0 = 997 * 9.81 * (69.9 + 428.5 / 10 / 2):997 * 9.81 * 428.5 / 10:9.81 * 997 * (69.9 + 428.5 / 10 * (10 - 1 / 2))
   //997 * data.g
-  connect(turbine.P_out, aggregate.P_in) annotation (
+  connect(turbine.P_out, unit.P_in) annotation (
     Line(points = {{18, 32}, {18, 32}, {18, 22}, {18, 22}, {18, 20}}, color = {0, 0, 127}));
   connect(control.y, turbine.u_t) annotation (
     Line(points={{11,84},{10,84},{10,54}}, color = {0, 0, 127}));
@@ -48,7 +48,7 @@ equation
     Line(points = {{-51.9, 63.9}, {-46, 63.9}, {-46, 69.9}, {-41.9, 69.9}}, color = {28, 108, 200}));
   connect(reservoir.n, intake.p) annotation (
     Line(points = {{-81.9, 65.9}, {-76, 65.9}, {-76, 63.9}, {-71.9, 63.9}}, color = {28, 108, 200}));
-  connect(load.y, aggregate.u) annotation (
+  connect(load.y, unit.u) annotation (
     Line(points = {{-1, 10}, {-1, 10}, {8, 10}}, color = {0, 0, 127}));
   annotation (
     experiment(StopTime = 2000, StartTime = 0, Tolerance = 0.0001, Interval = 0.4));
diff --git a/OpenHPL/Tests/HPElasticKPPenstockCompres.mo b/OpenHPL/Tests/HPElasticKPPenstockCompres.mo
@@ -28,11 +28,11 @@ model HPElasticKPPenstockCompres "Model of HP system with elastic penctock (KP),
     h_s0=69) annotation (Placement(transformation(extent={{-20,44},{0,64}})));
   Modelica.Blocks.Sources.Ramp load(duration = 1, height = -5e6, offset = 80e6, startTime = 600) annotation (
     Placement(transformation(extent = {{-22, 0}, {-2, 20}})));
-  OpenHPL.ElectroMech.Generators.SimpleGen aggregate annotation (Placement(transformation(extent={{6,0},{26,20}})));
+  OpenHPL.ElectroMech.Generators.SimpleGen unit annotation (Placement(transformation(extent={{6,0},{26,20}})));
 equation
-  connect(load.y, aggregate.u) annotation (
+  connect(load.y, unit.u) annotation (
     Line(points = {{-1, 10}, {6, 10}}, color = {0, 0, 127}));
-  connect(turbine.P_out, aggregate.P_in) annotation (
+  connect(turbine.P_out, unit.P_in) annotation (
     Line(points = {{14, 31}, {14, 25.5}, {12, 25.5}, {12, 20}}, color = {0, 0, 127}));
   connect(control.y, turbine.u_t) annotation (
     Line(points = {{11, 84}, {18, 84}, {18, 52.8}}, color = {0, 0, 127}));
diff --git a/OpenHPL/Tests/HPElasticKPPenstockHalfSurgeD.mo b/OpenHPL/Tests/HPElasticKPPenstockHalfSurgeD.mo
@@ -20,14 +20,14 @@ model HPElasticKPPenstockHalfSurgeD "Similar to previous HP system, but with twi
         origin={78,38},
         extent={{-10,10},{10,-10}},
         rotation=180)));
-  ElectroMech.Generators.SimpleGen aggregate(w_0=52) annotation (Placement(transformation(extent={{8,2},{28,22}})));
+  ElectroMech.Generators.SimpleGen unit(w_0=52) annotation (Placement(transformation(extent={{8,2},{28,22}})));
   ElectroMech.Turbines.Turbine turbine(C_v=3.7, WaterCompress=true) annotation (Placement(transformation(extent={{8,32},{28,52}})));
   Waterway.PenstockKP penstockKP(N=20, Vdot_0=19*ones(20)) annotation (Placement(transformation(extent={{-18,42},{2,62}})));
   Waterway.SurgeTank surgeTank(D=1.7) annotation (Placement(transformation(extent={{-44,60},{-24,80}})));
 equation
-  connect(turbine.P_out, aggregate.P_in) annotation (
+  connect(turbine.P_out, unit.P_in) annotation (
     Line(points = {{18, 32}, {18, 32}, {18, 22}, {18, 22}}, color = {0, 0, 127}));
-  connect(load.y, aggregate.u) annotation (
+  connect(load.y, unit.u) annotation (
     Line(points = {{1, 12}, {8, 12}}, color = {0, 0, 127}));
   connect(discharge.p, turbine.n) annotation (
     Line(points = {{38.1, 37.9}, {31, 37.9}, {31, 41.9}, {28.1, 41.9}}));
diff --git a/OpenHPL/Tests/HPElasticKPPenstockWithoutSurge.mo b/OpenHPL/Tests/HPElasticKPPenstockWithoutSurge.mo
@@ -32,9 +32,9 @@ model HPElasticKPPenstockWithoutSurge "Model of HP system without surge tank and
         extent={{-10,-10},{10,10}})));
   Modelica.Blocks.Sources.Ramp load(duration = 1, height = -5e6, offset = 80e6, startTime = 600) annotation (
     Placement(transformation(extent = {{-8, -2}, {12, 18}})));
-  ElectroMech.Generators.SimpleGen aggregate annotation (Placement(transformation(extent={{22,-2},{42,18}})));
+  ElectroMech.Generators.SimpleGen unit annotation (Placement(transformation(extent={{22,-2},{42,18}})));
 equation
-  connect(turbine.P_out, aggregate.P_in) annotation (
+  connect(turbine.P_out, unit.P_in) annotation (
     Line(points = {{32, 26}, {32, 26}, {32, 18}, {32, 18}}, color = {0, 0, 127}));
   connect(condiut.n, penstockKP1.p) annotation (
     Line(points = {{-37.9, 63.9}, {-26, 63.9}, {-26, 49.9}, {-15.9, 49.9}}, color = {28, 108, 200}));
@@ -48,7 +48,7 @@ equation
     Line(points = {{81.9, 41.9}, {80, 41.9}, {80, 33.9}, {76.1, 33.9}}, color = {28, 108, 200}));
   connect(turbine.p, penstockKP1.n) annotation (
     Line(points = {{22.1, 35.9}, {14, 35.9}, {14, 49.9}, {4.1, 49.9}}, color = {28, 108, 200}));
-  connect(load.y, aggregate.u) annotation (
+  connect(load.y, unit.u) annotation (
     Line(points = {{13, 8}, {13, 8}, {22, 8}}, color = {0, 0, 127}));
   annotation (
     experiment(StopTime = 2000, StartTime = 0, Tolerance = 0.0001, Interval = 0.4));
diff --git a/OpenHPL/Tests/HPSimpleElasticPenstock.mo b/OpenHPL/Tests/HPSimpleElasticPenstock.mo
@@ -36,11 +36,11 @@ model HPSimpleElasticPenstock "Model of HP system with elastic penctock (Stagard
   OpenHPL.ElectroMech.Turbines.Turbine turbine(C_v=3.7, WaterCompress=true) annotation (Placement(transformation(extent={{20,26},{40,46}})));
   Modelica.Blocks.Sources.Ramp load(duration = 1, height = -5e6, offset = 80e6, startTime = 600) annotation (
     Placement(transformation(extent = {{-10, -4}, {10, 16}})));
-  OpenHPL.ElectroMech.Generators.SimpleGen aggregate annotation (Placement(transformation(extent={{20,-4},{40,16}})));
+  OpenHPL.ElectroMech.Generators.SimpleGen unit annotation (Placement(transformation(extent={{20,-4},{40,16}})));
 equation
-  connect(load.y, aggregate.u) annotation (
+  connect(load.y, unit.u) annotation (
     Line(points = {{11, 6}, {20, 6}}, color = {0, 0, 127}));
-  connect(turbine.P_out, aggregate.P_in) annotation (
+  connect(turbine.P_out, unit.P_in) annotation (
     Line(points = {{26, 25}, {26, 16}}, color = {0, 0, 127}));
   connect(penstock.n, turbine.p) annotation (
     Line(points = {{10.1, 53.9}, {10.1, 43.95}, {20, 43.95}, {20, 36}}, color = {28, 108, 200}));
diff --git a/OpenHPL/Tests/HPSimpleElasticPenstockWithoutSurge.mo b/OpenHPL/Tests/HPSimpleElasticPenstockWithoutSurge.mo
@@ -26,11 +26,11 @@ model HPSimpleElasticPenstockWithoutSurge "Model of HP system without surge tank
         extent={{-10,-10},{10,10}})));
   Modelica.Blocks.Sources.Ramp load(duration = 1, height = -5e6, offset = 80e6, startTime = 600) annotation (
     Placement(transformation(extent = {{-16, 0}, {4, 20}})));
-  OpenHPL.ElectroMech.Generators.SimpleGen aggregate annotation (Placement(transformation(extent={{14,2},{34,22}})));
+  OpenHPL.ElectroMech.Generators.SimpleGen unit annotation (Placement(transformation(extent={{14,2},{34,22}})));
 equation
-  connect(load.y, aggregate.u) annotation (
+  connect(load.y, unit.u) annotation (
     Line(points = {{5, 10}, {9.5, 10}, {9.5, 12}, {14, 12}}, color = {0, 0, 127}));
-  connect(turbine1.P_out, aggregate.P_in) annotation (
+  connect(turbine1.P_out, unit.P_in) annotation (
     Line(points = {{20, 25}, {20, 22}}, color = {0, 0, 127}));
   connect(turbine1.u_t, control.y) annotation (
     Line(points={{16,48},{27,48},{27,48.8},{24,48.8},{24,84},{21,84}}, color = {0, 0, 127}));
diff --git a/OpenHPL/Tests/HPSimplePenstockAutoRefGate.mo b/OpenHPL/Tests/HPSimplePenstockAutoRefGate.mo
@@ -18,7 +18,7 @@ model HPSimplePenstockAutoRefGate
         origin={90,42},
         extent={{-10,10},{10,-10}},
         rotation=180)));
-  ElectroMech.Generators.SimpleGen aggregate(w_0=52.4) annotation (Placement(transformation(extent={{16,-4},{36,16}})));
+  ElectroMech.Generators.SimpleGen unit(w_0=52.4) annotation (Placement(transformation(extent={{16,-4},{36,16}})));
   Waterway.Pipe penstock(
     H=420,
     L=600,
@@ -41,7 +41,7 @@ model HPSimplePenstockAutoRefGate
   Modelica.Blocks.Sources.Constant const1(k = 0.0124905) annotation (
     Placement(transformation(extent = {{20, -56}, {40, -36}})));
 equation
-  connect(turbine.P_out, aggregate.P_in) annotation (
+  connect(turbine.P_out, unit.P_in) annotation (
     Line(points = {{26, 26}, {26, 26}, {26, 16}, {26, 16}}, color = {0, 0, 127}));
   connect(turbine.n, discharge.p) annotation (
     Line(points = {{36.1, 35.9}, {48.1, 35.9}}));
@@ -59,9 +59,9 @@ equation
     Line(points = {{41, -18}, {56, -18}}, color = {0, 0, 127}));
   connect(add.u2, const1.y) annotation (
     Line(points = {{56, -30}, {48, -30}, {48, -46}, {41, -46}}, color = {0, 0, 127}));
-  connect(load.y, aggregate.u) annotation (
+  connect(load.y, unit.u) annotation (
     Line(points = {{9, 6}, {12.5, 6}, {16, 6}}, color = {0, 0, 127}));
-  connect(gain.u, aggregate.u) annotation (
+  connect(gain.u, unit.u) annotation (
     Line(points = {{18, -18}, {12, -18}, {12, 6}, {16, 6}}, color = {0, 0, 127}));
   connect(add.y, turbine.u_t) annotation (
     Line(points = {{79, -24}, {88, -24}, {100, -24}, {100, 56}, {26, 56}, {26, 46.8}}, color = {0, 0, 127}));
diff --git a/OpenHPL/Tests/HPSimplePenstockFrancis.mo b/OpenHPL/Tests/HPSimplePenstockFrancis.mo
@@ -14,7 +14,7 @@ model HPSimplePenstockFrancis "HP system model with Francis turbine"
         origin={92,42},
         extent={{-10,10},{10,-10}},
         rotation=180)));
-  ElectroMech.Generators.SimpleGen aggregate(SteadyState=false, k_b=0) annotation (Placement(transformation(extent={{18,-4},{38,16}})));
+  ElectroMech.Generators.SimpleGen unit(SteadyState=false, k_b=0) annotation (Placement(transformation(extent={{18,-4},{38,16}})));
   Waterway.Pipe penstock(
     H=420,
     L=600,
@@ -54,9 +54,9 @@ model HPSimplePenstockFrancis "HP system model with Francis turbine"
         origin={-90,92},
         extent={{-10,-10},{10,10}})));
 equation
-  connect(aggregate.w_out, turbine.w_in) annotation (
+  connect(unit.w_out, turbine.w_in) annotation (
     Line(points = {{32, 16}, {32, 16}, {32, 28}, {32, 28}}, color = {0, 0, 127}));
-  connect(turbine.P_out, aggregate.P_in) annotation (
+  connect(turbine.P_out, unit.P_in) annotation (
     Line(points = {{24, 28}, {24, 28}, {24, 16}, {24, 16}}, color = {0, 0, 127}));
   connect(discharge.n, tail.n) annotation (
     Line(points = {{66.1, 35.9}, {76, 35.9}, {76, 41.9}, {81.9, 41.9}}));
@@ -70,7 +70,7 @@ equation
     Line(points = {{-43.9, 61.9}, {-40, 61.9}, {-40, 65.9}, {-31.9, 65.9}}));
   connect(surgeTank.n, penstock.p) annotation (
     Line(points = {{-11.9, 65.9}, {-2.1, 65.9}, {-2.1, 55.9}}));
-  connect(load.y, aggregate.u) annotation (
+  connect(load.y, unit.u) annotation (
     Line(points = {{7, 6}, {7, 6}, {18, 6}}, color = {0, 0, 127}));
   connect(control.y, turbine.u_t) annotation (
     Line(points = {{21, 86}, {28, 86}, {28, 48.8}}, color = {0, 0, 127}));
diff --git a/OpenHPL/Tests/HPSimplePenstockFrancisGener.mo b/OpenHPL/Tests/HPSimplePenstockFrancisGener.mo
@@ -13,7 +13,7 @@ model HPSimplePenstockFrancisGener "HP system model with Francis turbine and gen
         origin={92,42},
         extent={{-10,10},{10,-10}},
         rotation=180)));
-  ElectroMech.Generators.SynchGen aggregate(UseFrequencyOutput=true) annotation (Placement(transformation(extent={{18,-4},{38,16}})));
+  ElectroMech.Generators.SynchGen unit(UseFrequencyOutput=true) annotation (Placement(transformation(extent={{18,-4},{38,16}})));
   Waterway.Pipe penstock(
     H=420,
     L=600,
@@ -53,9 +53,9 @@ model HPSimplePenstockFrancisGener "HP system model with Francis turbine and gen
         origin={-90,92},
         extent={{-10,-10},{10,10}})));
 equation
-  connect(aggregate.w_out, turbine.w_in) annotation (
+  connect(unit.w_out, turbine.w_in) annotation (
     Line(points = {{34, 16}, {32, 16}, {32, 28}, {32, 28}}, color = {0, 0, 127}));
-  connect(turbine.P_out, aggregate.P_in) annotation (
+  connect(turbine.P_out, unit.P_in) annotation (
     Line(points = {{24, 28}, {22, 28}, {22, 16}, {22, 16}}, color = {0, 0, 127}));
   coef = turbine.Wdot_s / (495 * 997 * 9.81 * turbine.Vdot - (intake.F_f + discharge.F_f + penstock.F_f));
   connect(discharge.n, tail.n) annotation (
diff --git a/OpenHPL/Tests/HPSimplePenstockPelton.mo b/OpenHPL/Tests/HPSimplePenstockPelton.mo
@@ -33,11 +33,11 @@ model HPSimplePenstockPelton "HP system model with Pelton turbine"
     enable_P_out=true)                                 annotation (Placement(transformation(
         origin={10,34},
         extent={{-10,-10},{10,10}})));
-  OpenHPL.ElectroMech.Generators.SynchGen aggregate(np=5) annotation (Placement(transformation(extent={{0,-4},{20,16}})));
+  OpenHPL.ElectroMech.Generators.SynchGen unit(np=5) annotation (Placement(transformation(extent={{0,-4},{20,16}})));
 equation
-  connect(aggregate.P_in, turbine.P_out) annotation (
+  connect(unit.P_in, turbine.P_out) annotation (
     Line(points={{10,18},{10,45},{14,45}},       color = {0, 0, 127}));
-  connect(aggregate.w_out, turbine.w_in) annotation (
+  connect(unit.w_out, turbine.w_in) annotation (
     Line(points={{21,12},{21,20},{-2,20},{-2,26}},   color = {0, 0, 127}));
   connect(reservoir.n, intake.p) annotation (
     Line(points={{-82,62},{-77.95,62},{-77.95,60},{-72,60}}, color = {28, 108, 200}));
diff --git a/OpenHPL/Tests/HPSimplePenstockResKP.mo b/OpenHPL/Tests/HPSimplePenstockResKP.mo
@@ -11,7 +11,7 @@ model HPSimplePenstockResKP "Model of HP system with using reservoir model based
         origin={92,42},
         extent={{-10,10},{10,-10}},
         rotation=180)));
-  ElectroMech.Generators.SimpleGen aggregate annotation (Placement(transformation(extent={{18,-4},{38,16}})));
+  ElectroMech.Generators.SimpleGen unit annotation (Placement(transformation(extent={{18,-4},{38,16}})));
   Waterway.Pipe penstock(
     D_i=3.3,
     D_o=3.3,
@@ -34,15 +34,15 @@ model HPSimplePenstockResKP "Model of HP system with using reservoir model based
     W=1000,
     SteadyState=true) annotation (Placement(transformation(extent={{-102,52},{-82,72}})));
 equation
-  connect(turbine.P_out, aggregate.P_in) annotation (
+  connect(turbine.P_out, unit.P_in) annotation (
     Line(points = {{28, 26}, {28, 26}, {28, 16}, {28, 16}}, color = {0, 0, 127}));
   connect(discharge.n, tail.n) annotation (
     Line(points = {{66.1, 35.9}, {76, 35.9}, {76, 41.9}, {81.9, 41.9}}));
   connect(turbine.n, discharge.p) annotation (
     Line(points = {{38.1, 35.9}, {43.1, 35.9}, {46.1, 35.9}}));
   connect(turbine.p, penstock.n) annotation (
     Line(points = {{18.1, 35.9}, {-2.1, 35.9}}));
-  connect(load.y, aggregate.u) annotation (
+  connect(load.y, unit.u) annotation (
     Line(points = {{9, 6}, {9, 6}, {18, 6}}, color = {0, 0, 127}));
   connect(intake.n, surgeTank.p) annotation (
     Line(points = {{-43.9, 61.9}, {-40, 61.9}, {-40, 65.9}, {-31.9, 65.9}}));
diff --git a/OpenHPL/Tests/TestFitingSimpleHP.mo b/OpenHPL/Tests/TestFitingSimpleHP.mo
