Ask Your Question

PSSE damping constant

asked 2013-07-04 08:04:05 -0500

ruk gravatar image

Hi! The swing equation PSSE use is given in the program application guiden in section 14.4.4, equation 14.2. The constant De is told to "give an approximate representation of the damping effect contributed by the speed sensitivity of system loads" and that De "represents the variation of electrical load with frequency". What do they mean by that and what type of damping are they approximating? I have read the manual a few times but I cant really understand what they are meaning with the damping term D_e. Maybe someone have an example etc. that can explain this better?

Kind regards

edit retag flag offensive close merge delete

2 answers

Sort by ยป oldest newest most voted

answered 2013-07-04 18:59:09 -0500

Eli Pack gravatar image

I believe the effect they are referring to is load relief. Motors naturally respond to a reduction in frequency by reducing their load. The net load from different systems will have different proportions of motor loads, so it must be configurable. In mainland Australia for example; for every 1% change in frequency, there is approximately a 1.5% change in demand. For configuring the load frequency model, see section 9.9 (Load Frequency Model) of the MODELS guide.

edit flag offensive delete link more

answered 2013-08-11 17:06:50 -0500

EBC gravatar image

Power Generation, Operation, and Control book contains a very good explanation of the load damping within a generator model, Section 9.3 page 332. Check it out.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

[hide preview]

Question Tools

1 follower


Asked: 2013-07-04 08:04:05 -0500

Seen: 1,416 times

Last updated: Aug 11 '13