| 1 | model QuickRInverterSingle "single phase: singularity when ground between inductors"
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| 2 | import Modelica.SIunits.{Frequency,Voltage,Resistance,Inductance};
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| 3 | parameter Frequency f_grid = 50 "grid frequency";
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| 4 | parameter Voltage Vg = 230 * sqrt(2) "Grid amplitude voltage";
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| 5 | parameter Resistance Rf = 100e-3 "filter resistance";
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| 6 | parameter Inductance Lf = 0.2 "filter inductance";
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| 7 | Modelica.Electrical.Analog.Sources.ConstantVoltage constantVoltage1(V = 100) annotation(
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| 8 | Placement(visible = true, transformation(origin = {-80, -10}, extent = {{-10, -10}, {10, 10}}, rotation = -90)));
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| 9 | Modelica.Electrical.Analog.Basic.Inductor Lfa(L = Lf) annotation(
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| 10 | Placement(visible = true, transformation(origin = {36, 10}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
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| 11 | Modelica.Electrical.Analog.Basic.Ground neutral annotation(
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| 12 | Placement(visible = true, transformation(origin = {84, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 90)));
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| 13 | Modelica.Electrical.Analog.Basic.Inductor Lfb(L = Lf) annotation(
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| 14 | Placement(visible = true, transformation(origin = {36, -10}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
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| 15 | Modelica.Electrical.Analog.Basic.Resistor R1(R = 1e5) annotation(
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| 16 | Placement(visible = true, transformation(origin = {-40, 30}, extent = {{-10, -10}, {10, 10}}, rotation = -90)));
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| 17 | Modelica.Electrical.Analog.Basic.Resistor R2(R = 1e5) annotation(
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| 18 | Placement(visible = true, transformation(origin = {-40, -30}, extent = {{-10, -10}, {10, 10}}, rotation = -90)));
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| 19 | Modelica.Electrical.Analog.Basic.Resistor R3(R = 1e5) annotation(
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| 20 | Placement(visible = true, transformation(origin = {0, 30}, extent = {{-10, -10}, {10, 10}}, rotation = -90)));
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| 21 | Modelica.Electrical.Analog.Basic.Resistor R4(R = 1e5) annotation(
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| 22 | Placement(visible = true, transformation(origin = {0, -30}, extent = {{-10, -10}, {10, 10}}, rotation = -90)));
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| 23 | equation
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| 24 | connect(neutral.p, Lfa.n) annotation(
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| 25 | Line(points = {{74, 0}, {60, 0}, {60, 10}, {46, 10}, {46, 10}, {46, 10}}, color = {0, 0, 255}));
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| 26 | connect(Lfb.p, R3.n) annotation(
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| 27 | Line(points = {{26, -10}, {0, -10}, {0, 20}, {0, 20}}, color = {0, 0, 255}));
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| 28 | connect(Lfa.p, R1.n) annotation(
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| 29 | Line(points = {{26, 10}, {-40, 10}, {-40, 20}, {-40, 20}}, color = {0, 0, 255}));
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| 30 | connect(R3.n, R4.p) annotation(
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| 31 | Line(points = {{0, 20}, {0, 20}, {0, -20}, {0, -20}}, color = {0, 0, 255}));
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| 32 | connect(R1.n, R2.p) annotation(
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| 33 | Line(points = {{-40, 20}, {-40, 20}, {-40, -20}, {-40, -20}}, color = {0, 0, 255}));
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| 34 | connect(R2.n, constantVoltage1.n) annotation(
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| 35 | Line(points = {{-40, -40}, {-40, -40}, {-40, -60}, {-80, -60}, {-80, -20}, {-80, -20}}, color = {0, 0, 255}));
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| 36 | connect(constantVoltage1.n, R4.n) annotation(
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| 37 | Line(points = {{-80, -20}, {-80, -20}, {-80, -60}, {0, -60}, {0, -40}, {0, -40}}, color = {0, 0, 255}));
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| 38 | connect(R1.p, constantVoltage1.p) annotation(
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| 39 | Line(points = {{-40, 40}, {-40, 40}, {-40, 50}, {-80, 50}, {-80, 0}, {-80, 0}}, color = {0, 0, 255}));
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| 40 | connect(constantVoltage1.p, R3.p) annotation(
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| 41 | Line(points = {{-80, 0}, {-80, 0}, {-80, 50}, {0, 50}, {0, 40}, {0, 40}}, color = {0, 0, 255}));
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| 42 | connect(Lfb.n, Lfa.n) annotation(
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| 43 | Line(points = {{46, -10}, {60, -10}, {60, 10}, {46, 10}}, color = {0, 0, 255}));
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| 44 | annotation(
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| 45 | Diagram(coordinateSystem(extent = {{-100, -100}, {150, 100}}, initialScale = 0.1), graphics = {Text(origin = {23, 83}, extent = {{-113, 9}, {113, -9}}, textString = "singularity for R1.p.v
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| 46 | when ground is placed between the two inductors")}),
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| 47 | Icon(coordinateSystem(extent = {{-100, -100}, {150, 100}})),
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| 48 | __OpenModelica_commandLineOptions = "",
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| 49 | uses(Modelica(version = "3.2.2")));
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| 50 | end QuickRInverterSingle;
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