BusFault

Source: GridKit/Model/PhasorDynamics/BusFault/README.md

Represents an impedance fault at a bus. This device can exist in two states, on or off, controlled by the user. Following a state change, generally the solver needs to be reset as this is a discrete event.

Model Parameters

Symbol	Units	Description	Note
\(R\)	[p.u.]	Fault resistance
\(X\)	[p.u.]	Fault reactance
\(U\)	[unitless]	Binary status $\(\in \{0, 1\}\)$	Set by user to put fault on or off.

Model Derived Parameters

\[\begin{split}\begin{aligned} G &=\dfrac{R}{R^2+ X^2} \\ B &= -\dfrac{X}{R^2 + X^2}\\ \end{aligned}\end{split}\]

Model Variables

Internal Variables

Differential

None.

Algebraic

Symbol	Units	Description	Note
\(I_r\)	[p.u.]	Terminal current, real component	Read by bus
\(I_i\)	[p.u.]	Terminal current, imaginary component	Read by bus

External Variables

Differential

None.

Algebraic

Symbol	Units	Description	Note
\(V_r\)	[p.u.]	Terminal voltage, real component	owned by bus object
\(V_i\)	[p.u.]	Terminal voltage, imaginary component	owned by bus object

Model Equations

Differential Equations

None.

Algebraic Equations

\[\begin{split}\begin{aligned} 0 &= -I_{r} + U (-G V_{r} + B V_{i}) \\ 0 &= -I_{i} + U (-B V_{r} - G V_{i}) \end{aligned}\end{split}\]