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. The parameters for the 6-phase PI lines are the same as for those for 3-phase PI lines, except that the dimension of the R, L, and C matrices representing the impedance and admittance of the conductors is 6x6, instead of 3x3. The reason is that this model represents a line with six conductors. A 6-phase PI model can be used to represent a double-circuit transmission line. The neutral coupling between both circuits (mutual impedance) is represented only in zero sequences.

Table of Contents

Mask and Parameters

General 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] }

Matrix Parameters

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'}

Sequence Parameters

Name	Description				Unit	Variable = {Possible Values}

Name	Description		Unit	Variable = {Possible Values}
Self impedance - Line 1	R	Resistance value for Zero and Positive sequences (Line 1)	Ω/km	Rself1 = {'-1e64, 1e64'}
	L	Inductance value for Zero and Positive sequences (Line 1)	H/km	Lself1 = {'-1e64, 1e64'}
	C	Capacitance value for Zero and Positive sequences (Line 1)	F/km	Cself1 = {'-1e64, 1e64'}
Self impedance - Line 2	R	Resistance value for Zero and Positive sequences (Line 2)	Ω/km	Rself2 = {'-1e64, 1e64'}
	L	Inductance value for Zero and Positive sequences (Line 2)	H/km	Lself2 = {'-1e64, 1e64'}
	C	Capacitance value for Zero and Positive sequences (Line 2)	F/km	Cself2 = {'-1e64, 1e64'}
Mutual impedance lines 1-2	R	Mutual resistance value between lines 1-2	Ω/km	Rmut = {'-1e64, 1e64'}
	L	Mutual inductance value between lines 1-2	H/km	Lmut = {'-1e64, 1e64'}
	C	Mutual capacitance value between lines 1-2	F/km	Cmut = {'-1e64, 1e64'}

Line Generator

For more information see Line Generator

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

This component supports a 6-phase transmission line

Name	Description

Name	Description
net_1_1(a,b,c)	Network connection of phases (a,b,c) of the left (+) side of line 1
net_1_2(a,b,c)	Network connection of phases (a,b,c) of the right side of line 1
net_2_1(a,b,c)	Network connection of phases (a,b,c) of the left (+) side of line 2
net_2_2(a,b,c)	Network connection of phases (a,b,c) of the right side of line 2

Inputs

None

Outputs

None

Sensors

At acquisition, the signals available by the sensors are:

Name	Description	Unit

Name	Description	Unit
I1.1(a,b,c)	Current in each phase at left (+) end of line 1	A
I1.2(a,b,c)	Current in each phase at right end of line 1	A
I2.1(a,b,c)	Current in each phase at left (+) end of line 2	A
I2.2(a,b,c)	Current in each phase at right end of line 2	A

Calculation of Line Parameters

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 .

HYPERSIM Documentation

PI Section, 6-ph