Buildings.Electrical.Transmission.MediumVoltageCables
Package of medium voltage electricity cables used in distribution grid
Information
This package contains records of physical properties of medium voltage commercial cables. New cables can be added by extending the base record Buildings.Electrical.Transmission.MediumVoltageCables.Generic.
Extends from Modelica.Icons.MaterialPropertiesPackage (Icon for package containing property classes).
Package Content
| Name | Description |
|---|---|
 Annealed_Al_10
|
Annealed Al cable - AWG 1/0 |
| Annealed_Al_1000
|
Annealed Al cable - AWG 1000 |
| Annealed_Al_1500
|
Annealed Al cable - AWG 1500 |
| Annealed_Al_30
|
Annealed Al cable - AWG 3/0 |
| Annealed_Al_350
|
Annealed Al cable - kcmil 350 |
| Annealed_Al_40
|
Annealed Al cable - AWG 4/0 |
| Annealed_Al_500
|
Annealed Al cable - AWG 500 |
| Generic
|
Data record for a generic medium voltage cable |
Buildings.Electrical.Transmission.MediumVoltageCables.Annealed_Al_10
Annealed Al cable - AWG 1/0
Information
Annealed aluminium cable with a cross-sectional AWG 1/0 (American Wire Gauge). This type of cable has the following properties
Rdc = 0.551181e-3 // Characteristic DC resistance at T = T_ref[Ohm/m] T_ref= 298.15 // Reference temperature of the material [K] d = 9.195e-3 // Inner diameter [m] D = 26.543e-3 // Outer diameter [m] Amp = 195 // Ampacity [A]
Extends from Buildings.Electrical.Transmission.MediumVoltageCables.Generic (Data record for a generic medium voltage cable).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Material | material | Types.Material.Al | Material of the cable |
| Current | Amp | 195 | Ampacitance of the cable [A] |
| Temperature | T_ref | 298.15 | Reference cable temperature [K] |
| Temperature | M | 228.1 + 273.15 | Temperature constant of the material [K] |
| String | size | "1/0" | AWG or kcmil code representing the conductor size |
| CharacteristicResistance | Rdc | 0.551181e-3 | Characteristic DC resistance of the cable @ T_ref [Ohm/m] |
| Length | d | 9.195e-3 | Inner diameter [m] |
| Length | D | 26.543e-3 | Outer diameter [m] |
| Length | GMR | Buildings.Electrical.Transmi... | Geometrical Mean Radius of the cable [m] |
| Length | GMD | Buildings.Electrical.Transmi... | Geometrical Mean Diameter of the cable [m] |
Modelica definition
record Annealed_Al_10 "Annealed Al cable - AWG 1/0"
extends Buildings.Electrical.Transmission.MediumVoltageCables.Generic(
material=Types.Material.Al,
M = 228.1 + 273.15,
size="1/0",
Rdc=0.551181e-3,
T_ref=298.15,
d=9.195e-3,
D=26.543e-3,
GMR=Buildings.Electrical.Transmission.Functions.computeGMR(d),
GMD=Buildings.Electrical.Transmission.Functions.computeGMD(0.1905),
Amp=195);
end Annealed_Al_10;
Buildings.Electrical.Transmission.MediumVoltageCables.Annealed_Al_1000
Annealed Al cable - AWG 1000
Information
Annealed aluminium cable with a cross-sectional kcmil 1000 (thousand of Circular Mils). This type of cable has the following properties
Rdc = 5.80709e-5 // Characteristic DC resistance at T = T_ref[Ohm/m] T_ref= 298.15 // Reference temperature of the material [K] d = 28.372e-3 // Inner diameter [m] D = 46.101e-3 // Outer diameter [m] Amp = 640 // Ampacity [A]
Extends from Buildings.Electrical.Transmission.MediumVoltageCables.Generic (Data record for a generic medium voltage cable).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Material | material | Types.Material.Al | Material of the cable |
| Current | Amp | 640 | Ampacitance of the cable [A] |
| Temperature | T_ref | 298.15 | Reference cable temperature [K] |
| Temperature | M | 228.1 + 273.15 | Temperature constant of the material [K] |
| String | size | "1000" | AWG or kcmil code representing the conductor size |
| CharacteristicResistance | Rdc | 5.80709e-5 | Characteristic DC resistance of the cable @ T_ref [Ohm/m] |
| Length | d | 28.372e-3 | Inner diameter [m] |
| Length | D | 46.101e-3 | Outer diameter [m] |
| Length | GMR | Buildings.Electrical.Transmi... | Geometrical Mean Radius of the cable [m] |
| Length | GMD | Buildings.Electrical.Transmi... | Geometrical Mean Diameter of the cable [m] |
Modelica definition
record Annealed_Al_1000 "Annealed Al cable - AWG 1000"
extends Buildings.Electrical.Transmission.MediumVoltageCables.Generic(
material=Types.Material.Al,
M = 228.1 + 273.15,
size="1000",
Rdc=5.80709e-5,
T_ref=298.15,
d=28.372e-3,
D=46.101e-3,
GMR=Buildings.Electrical.Transmission.Functions.computeGMR(d),
GMD=Buildings.Electrical.Transmission.Functions.computeGMD(0.1905),
Amp=640);
end Annealed_Al_1000;
Buildings.Electrical.Transmission.MediumVoltageCables.Annealed_Al_1500
Annealed Al cable - AWG 1500
Information
Annealed aluminium cable with a cross-sectional kcmil 1500 (thousand of Circular Mils). This type of cable has the following properties
Rdc = 3.87139e-5 // Characteristic DC resistance at T = T_ref[Ohm/m] T_ref= 298.15 // Reference temperature of the material [K] d = 34.798e-3 // Inner diameter [m] D = 53.34e-3 // Outer diameter [m] Amp = 800 // Ampacity [A]
Extends from Buildings.Electrical.Transmission.MediumVoltageCables.Generic (Data record for a generic medium voltage cable).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Material | material | Types.Material.Al | Material of the cable |
| Current | Amp | 800 | Ampacitance of the cable [A] |
| Temperature | T_ref | 298.15 | Reference cable temperature [K] |
| Temperature | M | 228.1 + 273.15 | Temperature constant of the material [K] |
| String | size | "1500" | AWG or kcmil code representing the conductor size |
| CharacteristicResistance | Rdc | 3.87139e-5 | Characteristic DC resistance of the cable @ T_ref [Ohm/m] |
| Length | d | 34.798e-3 | Inner diameter [m] |
| Length | D | 53.34e-3 | Outer diameter [m] |
| Length | GMR | Buildings.Electrical.Transmi... | Geometrical Mean Radius of the cable [m] |
| Length | GMD | Buildings.Electrical.Transmi... | Geometrical Mean Diameter of the cable [m] |
Modelica definition
record Annealed_Al_1500 "Annealed Al cable - AWG 1500"
extends Buildings.Electrical.Transmission.MediumVoltageCables.Generic(
material=Types.Material.Al,
M = 228.1 + 273.15,
size="1500",
Rdc=3.87139e-5,
T_ref=298.15,
d=34.798e-3,
D=53.34e-3,
GMR=Buildings.Electrical.Transmission.Functions.computeGMR(d),
GMD=Buildings.Electrical.Transmission.Functions.computeGMD(0.1905),
Amp=800);
end Annealed_Al_1500;
Buildings.Electrical.Transmission.MediumVoltageCables.Annealed_Al_30
Annealed Al cable - AWG 3/0
Information
Annealed aluminium cable with a cross-sectional AWG 2/0 (American Wire Gauge). This type of cable has the following properties
Rdc = 0.344488e-3 // Characteristic DC resistance at T = T_ref[Ohm/m] T_ref= 298.15 // Reference temperature of the material [K] d = 11.582e-3 // Inner diameter [m] D = 28.956e-3 // Outer diameter [m] Amp = 250 // Ampacity [A]
Extends from Buildings.Electrical.Transmission.MediumVoltageCables.Generic (Data record for a generic medium voltage cable).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Material | material | Types.Material.Al | Material of the cable |
| Current | Amp | 250 | Ampacitance of the cable [A] |
| Temperature | T_ref | 298.15 | Reference cable temperature [K] |
| Temperature | M | 228.1 + 273.15 | Temperature constant of the material [K] |
| String | size | "3/0" | AWG or kcmil code representing the conductor size |
| CharacteristicResistance | Rdc | 0.344488e-3 | Characteristic DC resistance of the cable @ T_ref [Ohm/m] |
| Length | d | 11.582e-3 | Inner diameter [m] |
| Length | D | 28.956e-3 | Outer diameter [m] |
| Length | GMR | Buildings.Electrical.Transmi... | Geometrical Mean Radius of the cable [m] |
| Length | GMD | Buildings.Electrical.Transmi... | Geometrical Mean Diameter of the cable [m] |
Modelica definition
record Annealed_Al_30 "Annealed Al cable - AWG 3/0"
extends Buildings.Electrical.Transmission.MediumVoltageCables.Generic(
material=Types.Material.Al,
M = 228.1 + 273.15,
size="3/0",
Rdc=0.344488e-3,
T_ref=298.15,
d=11.582e-3,
D=28.956e-3,
GMR=Buildings.Electrical.Transmission.Functions.computeGMR(d),
GMD=Buildings.Electrical.Transmission.Functions.computeGMD(0.1905),
Amp=250);
end Annealed_Al_30;
Buildings.Electrical.Transmission.MediumVoltageCables.Annealed_Al_350
Annealed Al cable - kcmil 350
Information
Annealed aluminium cable with a cross-sectional kcmil 350 (thousand of Circular Mils). This type of cable has the following properties
Rdc = 0.165682e-3 // Characteristic DC resistance at T = T_ref[Ohm/m] T_ref= 298.15 // Reference temperature of the material [K] d = 16.789e-3 // Inner diameter [m] D = 34.417e-3 // Outer diameter [m] Amp = 375 // Ampacity [A]
Extends from Buildings.Electrical.Transmission.MediumVoltageCables.Generic (Data record for a generic medium voltage cable).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Material | material | Types.Material.Al | Material of the cable |
| Current | Amp | 375 | Ampacitance of the cable [A] |
| Temperature | T_ref | 298.15 | Reference cable temperature [K] |
| Temperature | M | 228.1 + 273.15 | Temperature constant of the material [K] |
| String | size | "350" | AWG or kcmil code representing the conductor size |
| CharacteristicResistance | Rdc | 0.165682e-3 | Characteristic DC resistance of the cable @ T_ref [Ohm/m] |
| Length | d | 16.789e-3 | Inner diameter [m] |
| Length | D | 34.417e-3 | Outer diameter [m] |
| Length | GMR | Buildings.Electrical.Transmi... | Geometrical Mean Radius of the cable [m] |
| Length | GMD | Buildings.Electrical.Transmi... | Geometrical Mean Diameter of the cable [m] |
Modelica definition
record Annealed_Al_350 "Annealed Al cable - kcmil 350"
extends Buildings.Electrical.Transmission.MediumVoltageCables.Generic(
material=Types.Material.Al,
M = 228.1 + 273.15,
size="350",
Rdc=0.165682e-3,
T_ref=298.15,
d=16.789e-3,
D=34.417e-3,
GMR=Buildings.Electrical.Transmission.Functions.computeGMR(d),
GMD=Buildings.Electrical.Transmission.Functions.computeGMD(0.1905),
Amp=375);
end Annealed_Al_350;
Buildings.Electrical.Transmission.MediumVoltageCables.Annealed_Al_40
Annealed Al cable - AWG 4/0
Information
Annealed aluminium cable with a cross-sectional AWG 4/0 (American Wire Gauge). This type of cable has the following properties
Rdc = 0.274278e-3 // Characteristic DC resistance at T = T_ref[Ohm/m] T_ref= 298.15 // Reference temperature of the material [K] d = 13.005e-3 // Inner diameter [m] D = 30.353e-3 // Outer diameter [m] Amp = 285 // Ampacity [A]
Extends from Buildings.Electrical.Transmission.MediumVoltageCables.Generic (Data record for a generic medium voltage cable).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Material | material | Types.Material.Al | Material of the cable |
| Current | Amp | 285 | Ampacitance of the cable [A] |
| Temperature | T_ref | 298.15 | Reference cable temperature [K] |
| Temperature | M | 228.1 + 273.15 | Temperature constant of the material [K] |
| String | size | "4/0" | AWG or kcmil code representing the conductor size |
| CharacteristicResistance | Rdc | 0.274278e-3 | Characteristic DC resistance of the cable @ T_ref [Ohm/m] |
| Length | d | 13.005e-3 | Inner diameter [m] |
| Length | D | 30.353e-3 | Outer diameter [m] |
| Length | GMR | Buildings.Electrical.Transmi... | Geometrical Mean Radius of the cable [m] |
| Length | GMD | Buildings.Electrical.Transmi... | Geometrical Mean Diameter of the cable [m] |
Modelica definition
record Annealed_Al_40 "Annealed Al cable - AWG 4/0"
extends Buildings.Electrical.Transmission.MediumVoltageCables.Generic(
material=Types.Material.Al,
M = 228.1 + 273.15,
size="4/0",
Rdc=0.274278e-3,
T_ref=298.15,
d=13.005e-3,
D=30.353e-3,
GMR=Buildings.Electrical.Transmission.Functions.computeGMR(d),
GMD=Buildings.Electrical.Transmission.Functions.computeGMD(0.1905),
Amp=285);
end Annealed_Al_40;
Buildings.Electrical.Transmission.MediumVoltageCables.Annealed_Al_500
Annealed Al cable - AWG 500
Information
Annealed aluminium cable with a cross-sectional kcmil 500 (thousand of Circular Mils). This type of cable has the following properties
Rdc = 0.116142e-3 // Characteristic DC resistance at T = T_ref[Ohm/m] T_ref= 298.15 // Reference temperature of the material [K] d = 20.066e-3 // Inner diameter [m] D = 37.592e-3 // Outer diameter [m] Amp = 450 // Ampacity [A]
Extends from Buildings.Electrical.Transmission.MediumVoltageCables.Generic (Data record for a generic medium voltage cable).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Material | material | Types.Material.Al | Material of the cable |
| Current | Amp | 450 | Ampacitance of the cable [A] |
| Temperature | T_ref | 298.15 | Reference cable temperature [K] |
| Temperature | M | 228.1 + 273.15 | Temperature constant of the material [K] |
| String | size | "500" | AWG or kcmil code representing the conductor size |
| CharacteristicResistance | Rdc | 0.116142e-3 | Characteristic DC resistance of the cable @ T_ref [Ohm/m] |
| Length | d | 20.066e-3 | Inner diameter [m] |
| Length | D | 37.592e-3 | Outer diameter [m] |
| Length | GMR | Buildings.Electrical.Transmi... | Geometrical Mean Radius of the cable [m] |
| Length | GMD | Buildings.Electrical.Transmi... | Geometrical Mean Diameter of the cable [m] |
Modelica definition
record Annealed_Al_500 "Annealed Al cable - AWG 500"
extends Buildings.Electrical.Transmission.MediumVoltageCables.Generic(
material=Types.Material.Al,
M = 228.1 + 273.15,
size="500",
Rdc=0.116142e-3,
T_ref=298.15,
d=20.066e-3,
D=37.592e-3,
GMR=Buildings.Electrical.Transmission.Functions.computeGMR(d),
GMD=Buildings.Electrical.Transmission.Functions.computeGMD(0.1905),
Amp=450);
end Annealed_Al_500;
Buildings.Electrical.Transmission.MediumVoltageCables.Generic
Data record for a generic medium voltage cable
Information
This is a base record for specifying physical properties for medium voltage commercial cables. New cables can be added by extending it.
For medium voltage cables, the geometric properties of the cable and the material are specified. For example some of the properties that are specified are:
Rdc : Characteristic DC resistance at T = T_ref[Ohm/m] T_ref : Reference temperature of the material [K] d : Inner diameter [m] D : Outer diameter [m] Amp : Ampacity [A]
other properties such as the geometric mean diameter GMD and the geometric mean radius GMR are by default computed using functions, but this can be overriden.
Extends from Modelica.Icons.MaterialProperty (Icon for property classes), Buildings.Electrical.Transmission.BaseClasses.BaseCable (Record that contains the properties of a generic cable).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Material | material | Buildings.Electrical.Transmi... | Material of the cable |
| Current | Amp | 0.0 | Ampacitance of the cable [A] |
| Temperature | T_ref | 298.15 | Reference cable temperature [K] |
| Temperature | M | 228.1 + 273.15 | Temperature constant of the material [K] |
| String | size | AWG or kcmil code representing the conductor size | |
| CharacteristicResistance | Rdc | Characteristic DC resistance of the cable @ T_ref [Ohm/m] | |
| Length | d | Inner diameter [m] | |
| Length | D | Outer diameter [m] | |
| Length | GMR | Geometrical Mean Radius of the cable [m] | |
| Length | GMD | Geometrical Mean Diameter of the cable [m] |
Modelica definition
record Generic "Data record for a generic medium voltage cable"
extends Modelica.Icons.MaterialProperty;
extends Buildings.Electrical.Transmission.BaseClasses.BaseCable;
parameter String size(start="")
"AWG or kcmil code representing the conductor size";
parameter Buildings.Electrical.Types.CharacteristicResistance Rdc(start=0)
"Characteristic DC resistance of the cable @ T_ref";
parameter Modelica.SIunits.Length d "Inner diameter";
parameter Modelica.SIunits.Length D "Outer diameter";
parameter Modelica.SIunits.Length GMR "Geometrical Mean Radius of the cable";
parameter Modelica.SIunits.Length GMD
"Geometrical Mean Diameter of the cable";
redeclare function extends lineResistance
"Function that computes the resistance of a cable"
input Buildings.Electrical.Transmission.MediumVoltageCables.Generic cable
"Record that contains cable properties";
algorithm
R := l*cable.Rdc*Buildings.Electrical.Transmission.Functions.R_AC_correction(
cable.size, cable.material);
end lineResistance;
redeclare function extends lineInductance
"Function that computes the resistance of a cable"
input Buildings.Electrical.Transmission.MediumVoltageCables.Generic cable
"Record that contains cable properties";
algorithm
L := l*2e-7*log(cable.GMD/cable.GMR);
end lineInductance;
redeclare function extends lineCapacitance
"Function that computes the capacitance of a cable"
input Buildings.Electrical.Transmission.MediumVoltageCables.Generic cable
"Record that contains cable properties";
protected
Modelica.SIunits.Length r "Radius";
algorithm
r := cable.d/2.0;
C := l*2*Modelica.Constants.pi*Modelica.Constants.epsilon_0/log(cable.GMD/r);
end lineCapacitance;
end Generic;