LFL 2.0 Nonlinear loadflowcomputation with Spice 

Website for doing nonlinear loadflowcomputation with spicesimulators !

This site is dedicated for didactical purpose ( all programs , examples and documentations are free - sources are included )

I want to make a standard simulator for electronic simulations usable to the high energy network domain

It is especially adequate for students in electrical engineering and people interested in  simulation of electrical networks

At this time libraryfiles for the simulators Winspice , Spiceopus , Superspice , Orcad91-Student  , LTSpice ( SwcadIII ) und VISUAL-Spice are available.

Symbolfiles to grafically design your own circuits are available for Orcad , Superspice , LT-Spice ( SwcadIII ) and VISUAL-Spice

Detailed documentation starting from mathematical fundamentals till accurate modelling of loadflow elements

Availlability of all model elements for doing loadflowcomputations e.g:

  • Slacks ( constant voltage sources , PV-slacks )

  • Constant power sources , constant current sources , constant impedance sources

  • Constant power loads, constantcurrentloads , constant impedance loads

  • Regulated transformer  with additional windings to regulate the active and reactive powerflow  ( also combined , with user defined voltage angle  )

  • Aerial line models , cable models

  • Capacitive and inductive compensating reactors ( for voltage level regulation  )

  • Short circuit limiting reactors

  • Petersencoils ů 



Many examples from the whole high energy network domain ( especially for LT - Spice ) e.g :

  • Loss - minimizing of a network

  • Simulation of a loadline for a whole energyday! - Everything in a single simulation

  • Influence of the natural loadflow through regulated transformers and compensating elements and many more ...........


You can additionally download:

  • converter from Pspice to Spice3/Xspice Syntax ( ps2sp.pl )  NEW V4.14 supports now nearly all Pspice syntax 

  • A perl based optimizer for Spicesimulators ( adapted to LTSpice but also adaptable to other simulators and environements )

  • A converter for LTspice loadflowmacromodels to spiceopus loadlfowcodemodels ( mm2cm.pl ).

With this utils it is possible to design a loadflow network in LTspice , convert it to spiceopus and to simulate and optimize it

The results can be visualized in spiceopus or again in LTspice ( their rawfileformats converted with a small perl - based rawfile format converter )


( HINT: visit also the LTSPICE user group at Yahoo )