How do you model the line energisation of a BI-phase system using a distributed parameter line model?
Category:
Dynamic Simulation
Answer
In the attached PowerFactory project, part of a railway transmission network is modelled based on BI-phase technology. The simple network model contains three 110 kV overhead line sections which are modelled with distributed parameters.
Three study cases are included in the example:
- Steady State Simulation
- Short Circuit Simulation
- Line Energisation Simulation
In the first study case the steady state load condition is analysed by means of EMT simulation. In the second study case a short circuit at the central substation is investigated.
Finally the energisation of the disconnected overhead line “Central-West” is simulated showing transients overvoltages due to travelling wave effects. The maximum overvoltage reaches 173 kV, which is 2.23 per unit with respect to the 110 kV system voltage.
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