Description

The PI line model is mainly used for short transmission lines. The equivalent circuit is shown below.

It is assumed that the capacitance on both sides is identical. The RL branches are also coupled.

Table of Contents

Mask and Parameters

Name	Description				Unit	Variable = {Possible Values}

Name	Description		Unit	Variable = {Possible Values}
Description	Use this field to add information about the component			Description = {'string'}
EMTP (.pun) file for line parameters calculation	The location (path) of the EMTP file (pun file) containing the line parameters. However, the EMTP “.pun” format is not allowed with this model			File = {'path.name'}
Type	The line data can be taken using Matrix or Sequence parameters			Matrix/Sequence = { 0, 1}
	Matrix {0}	Untransposed line. The data is filled in the matrices
	Sequence {1}	Transposed line. The data is filled in the sequences
Line Length	The length of the line		km	length = {0, 1e64}
Base power (perPhase)	Base value for PU conversion		MVA per phase	pBase = { [1, 1e64] }
Base voltage (rmsLN)	Base value for PU conversion		kV rms LN	vBase = { [1, 1e64] }
Base frequecy	Base value for PU conversion		Hz	fBase = { [1, 1e64] }

Name	Description				Unit	Variable = {Possible Values}

Name	Description	Unit	Variable = {Possible Values}
Resistance - R	Resistance matrix	Ω/km	R = {'-1e64, 1e64'}
Inductance - L	Inductance matrix	H/km	L = {'-1e64, 1e64'}
Capacitance - C	Capacitance matrix	F/km	C = {'-1e64, 1e64'}

Name	Description				Unit	Variable = {Possible Values}

Name	Description	Unit	Variable = {Possible Values}
R	Resistance value for Zero and Positive sequences	Ω/km	Rseq = {'-1e64, 1e64'}
L	Inductance value for Zero and Positive sequences	H/km	Lseq = {'-1e64, 1e64'}
C	Capacitance value for Zero and Positive sequences	F/km	Cseq = {'-1e64, 1e64'}

For more information see Line Generator

The EMTP “.pun” format is not allowed with this model. However, the electrical parameters of PI lines can be calculated by using the Line Generator .

This component supports a 3-phase transmission line

Name	Description

Name	Description
net_1(a,b,c)	Network connection of phases (a,b,c) of the left (+) side
net_2(a,b,c)	Network connection of phases (a,b,c) of the right side

None

None

At acquisition, the signals available by the sensors are:

Name	Description	Unit

Name	Description	Unit
I1(a,b,c)	Current in each phase at left (+) end	A
I2(a,b,c)	Current in each phase at right end	A