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Description

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

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


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Mask and Parameters

General Parameters

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Name

Description

Unit

Variable = {Possible Values}

Description

Use this field to add information about the component

Description  


Description = {'string'}

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 

pBase = { [1, 1e64] }

Base voltage (rmsLN)

Base value for PU conversion

kV rms LN

vBase 

vBase = { [1, 1e64] }

Base frequecy

Base value for PU conversion

Hz

fBase

fBase = { [1, 1e64] }

Matrix Parameters

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Name

Description

Unit

Variable = {Possible Values}

Resistance - R

Resistance matrix

Ω/km

R

= {'-1e64, 1e64'}

Inductance - L

Inductance matrix

H/km

= {'-1e64, 1e64'}

Capacitance - C

Capacitance matrix

F/km

= {'-1e64, 1e64'}

Sequence Parameters

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Name

Description

Unit

Variable = {Possible Values}

R

Resistance value for Zero and Positive sequences

Ω/km

Rseq

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'}

Ports, Inputs, Outputs, and Signals Available for Monitoring

Ports

This component has four 1-phase terminals. It means that only single-phase lines can be connected to its terminals:

Name

Description

net_1_1

Network connection of phase a of

the 

the left (+)

 side

 side

net_1_2

Network connection of phases a of

the 

the right

 side

 side

net_2_1

Network connection of phase b of

the 

the left (+)

 side

 side

net_2_2

Network connection of phases b of

the 

the right

 side

 side

Inputs

None

Outputs

None

Sensors

At acquisition, the signals available by the sensors are:

Name

Description

Unit

I1a

Current flowing into port net_1_1

A

I2a

Current flowing out of port net_2_1

A

I1a

Current flowing into port net_1_2

A

I2b

Current flowing out of port net_2_2

A

Calculation of Electrical Parameters

The EMTP “.pun” format is not allowed with this model. However,

the

the electrical parameters of PI lines can be calculated by using

the HyperView Line Tab module in HyperView.

Steps are as follows:

  1. Load a file into the Line Data GUI or enter the geometrical line parameters; details are found in Line Geometry.
  2. Select the transposition options
  3. Run the program
  4. The electrical parameters are displayed in the Line Data Report

To transfer the electrical parameters to the PI model, follow these steps:

  • Go to the Line Data GUI
  • The names of the lines in your network are at the bottom of the page
  • To transfer electrical parameters, choose the name of the line and click Apply
  • See the parameters in the forms of the line