<< Click to Display Table of Contents >> Navigation:  Macros > Macro commands and parameters > Macro calculating commands > Fault analysis

Purpose:

Calculation of a Sequential Fault Analysis on a node, in a cable or in a line.

 

If the calculation is called for one node, for that node the short circuit is calculated. Of all other nodes and branches the voltages and currents in that situation are available. The transformer tap changers are in this calculation not adapted to the loadflow situation.

If the calculation is called with NIL (without specification of node, cable or line), only the initial situation (the loadflow situation) will be calculated.

 

General notation:

Fault ( Node( NodeName ) ,              , FaultType, Rf, Xf )

Fault ( Cable( CableName ), Distance, FaultType, Rf, Xf )

Fault ( Line( LineName )    , Distance, FaultType, Rf, Xf )

or

Fault ( NIL,  ,  ,  ,  )

 

For Distance the distance from the FirstNode to the fault location in the cable or line will be specified, in percent (1 up to 99).

 

For FaultType a textvalue or a textvariable indicates the type of fault. The possible values are:

 

For Rf:

The fault resistance, in Ohm

 

For Xf:

The fault reactance, in Ohm

 

After a successful execution the standard objects Network.Result and Object.Result will be equal to 'FA', otherwise 'NO'.

 

Example:

Calculation of a symmetrical fault analysis with a zero-impedance short circuit:

 Fault ( Node ('MyNode') ,  , 'abc' , 0, 0 )

Calculation of a single phase fault analysis with fault impedance 0.1+j0.1 Ohm:

 Set( FaultType, 'a0' )

 Set( Rf, 0.1 )

 Set( Xf, 0.1 )

 Fault ( Node ('MyNode') ,  , FaultType, Rf, Xf )

 

Back to Macro calculating commands