Overvoltage Transients Simulation

[Adam1980]

Dear members,

I would appreciate if i can some suggestions regarding literature and publications or examples related to the modelling of networks for switching overvoltages.

Thank you.

 

[magoo2]

If you go to the ATP website, they have a lot of material on modelling. ATP stands for the Alternate Transients Program. It was offered as a free alternative to the EMTP program (Electromagnetic Transients Program) which was owned by EPRI.

Allan Greenwood had a pretty good book on transients, Electrical Transients in Power Systems. I'm sure others will post suggestions.

What is your main interest - Line switching, capacitor bank switching, etc. - or all of the above?

 

[Adam1980]

Hello thanks for the reply, my main interest at the moment is long cables (subsea) switching, but looking forward to develop my knowledge in other areas as well.

I am reviewing these 3 references but would like to know if there are any other recommendations:
- Transients in Power Systems - L. van der Sluis
- Power System Transients - Parameter Determination - J. Martinez-Velasco
- Power Systems Electromagnetic Transients Simulation - N. R. Watson

Thank you.

 

[juleselec]

I second magoo's suggestion regarding the Greenwood book - it is probably considered the classic text for EMT.

Dommel's EMTP theory book (

http://www.dee.ufrj.br/Transm_Energia/Arquivos/EMTPTB.PDF)

is also pretty good (and also free).

 

[Adam1980]

Hello thanks for the reply, as i can see these are a lot of reading material.

Now i know exactly what i need to model. It is a switching over-voltage following a fault (breaker opening). The network is mainly passive (no generation just public grid) and the loads are static.

So my question is what is needed to be modeled as opposed to steady-state modelling. For example if the switching event was for energization the transformer core saturation should be modeled accurately along with the stray capacitance but in this case i guess only the stray capacitance is important.

Finally what would be the equivalent model for the cables going away from the fault point (i.e. away from the point of interest).

Thank you.

 

[magoo2]

I would usually model one bus back from the switching point and use a source impedance behind that. For a breaker switching, this might involve a transformer behind the breaker. In addition, the load would have to be modelled in a fair amount of detail.