roseau.load_flow.constants¶

Physical and mathematical constants used in the load flow calculations.

Attributes¶

`SQRT3`	The square root of 3.
`ALPHA`	Phasor rotation operator \(\alpha\), which rotates a phasor vector counterclockwise
`ALPHA2`	Phasor rotation operator \(\alpha^2\), which rotates a phasor vector clockwise by
`PI`	The famous mathematical constant \(\pi = 3.141592\ldots\).
`CLOCK_PHASE_SHIFT`	Phase shift for each clock number in the transformer vector group notation.
`MU_0`	Magnetic permeability of the vacuum \(\mu_0 = 4 \pi \times 10^{-7}\) (H/m).
`EPSILON_0`	Vacuum permittivity \(\varepsilon_0 = 8.8541878128 \times 10^{-12}\) (F/m).
`F`	Network frequency \(f = 50\) (Hz).
`OMEGA`	Angular frequency \(\omega = 2 \pi f\) (rad/s).
`RHO`	Resistivity of common conductor materials (Ohm.m).
`MU_R`	Relative magnetic permeability of common conductor materials.
`DELTA_P`	Skin depth of common conductor materials \(\sqrt{\dfrac{\rho}{\pi f \mu_r \mu_0}}\) (mm).
`TAN_D`	Loss angles of common insulator materials according to the IEC 60287 standard.
`EPSILON_R`	Relative permittivity of common insulator materials according to the IEC 60287 standard.

ALPHA: Final¶

Phasor rotation operator \(\alpha\), which rotates a phasor vector counterclockwise by 120 degrees when multiplied by it.

ALPHA2: Final¶

Phasor rotation operator \(\alpha^2\), which rotates a phasor vector clockwise by 120 degrees when multiplied by it.

PI: Final = 3.141592653589793¶: The famous mathematical constant \(\pi = 3.141592\ldots\).

CLOCK_PHASE_SHIFT: Final¶: Phase shift for each clock number in the transformer vector group notation.

MU_0: Final¶: Magnetic permeability of the vacuum \(\mu_0 = 4 \pi \times 10^{-7}\) (H/m).

EPSILON_0: Final¶: Vacuum permittivity \(\varepsilon_0 = 8.8541878128 \times 10^{-12}\) (F/m).

RHO: Final[dict[roseau.load_flow.types.Material, Q_[float]]]¶: Resistivity of common conductor materials (Ohm.m).

MU_R: Final[dict[roseau.load_flow.types.Material, Q_[float]]]¶: Relative magnetic permeability of common conductor materials.

DELTA_P: Final[dict[roseau.load_flow.types.Material, Q_[float]]]¶: Skin depth of common conductor materials \(\sqrt{\dfrac{\rho}{\pi f \mu_r \mu_0}}\) (mm).

TAN_D: Final[dict[roseau.load_flow.types.Insulator, Q_[float]]]¶: Loss angles of common insulator materials according to the IEC 60287 standard.

EPSILON_R: Final[dict[roseau.load_flow.types.Insulator, Q_[float]]]¶: Relative permittivity of common insulator materials according to the IEC 60287 standard.