ACLine

Common Parameters: u, name, idx, bus1, bus2, r, x

Available models: Line

Line

AC transmission line model.

The model is also used for two-winding transformer. Transformers can set the tap ratio in tap and/or phase shift angle phi.

Note that the bus admittance matrix is built on fly and is not stored in the object.

Notes

There is a known issue that adding Algeb ud will cause Line.algebs run into AttributeError: 'NoneType' object has no attribute 'n'. Not figured out why yet.

Parameters

Name	Symbol	Description	Default	Unit	Properties
idx		unique device idx
u	\(u\)	connection status	1	bool
name		device name
bus1		idx of from bus
bus2		idx of to bus
Sn	\(S_n\)	Power rating	100	MW	non_zero
fn	\(f\)	rated frequency	60	Hz
Vn1	\(V_{n1}\)	AC voltage rating	110	kV	non_zero
Vn2	\(V_{n2}\)	rated voltage of bus2	110	kV	non_zero
r	\(r\)	line resistance	0.000	p.u.	z
x	\(x\)	line reactance	0.000	p.u.	non_zero,z
b		shared shunt susceptance	0	p.u.	y
g		shared shunt conductance	0	p.u.	y
b1	\(b_1\)	from-side susceptance	0	p.u.	y
g1	\(g_1\)	from-side conductance	0	p.u.	y
b2	\(b_2\)	to-side susceptance	0	p.u.	y
g2	\(g_2\)	to-side conductance	0	p.u.	y
trans		transformer branch flag	0	bool
tap	\(t_{ap}\)	transformer branch tap ratio	1	float	non_negative
phi	\(\phi\)	transformer branch phase shift in rad	0	radian
rate_a	\(R_{ATEA}\)	long-term flow limit (placeholder)	999	p.u.
rate_b	\(R_{ATEB}\)	short-term flow limit (placeholder)	999	p.u.
rate_c	\(R_{ATEC}\)	emergency flow limit (placeholder)	999	p.u.
owner		owner code
xcoord		x coordinates
ycoord		y coordinates
amin	\(a_{min}\)	minimum angle difference, from bus - to bus	-6.283	rad
amax	\(a_{max}\)	maximum angle difference, from bus - to bus	6.283	rad