# generator speed calculation

Hi all, Please help me with this issue. your support is invaluable to me I am studying the swing equation by using Psse. I made a dynamic test for one generator and try to use the result to compare with my calculation. This is the setting for the dynamic simulation: initial power = 0.5, step change = 0.1 (Pe = 0.6) This is the parameters of the target generator 101 'GENROU' 1 10.500 0.48000E-01 0.65000 0.50000E-01 5.7400 0.0000 2.3120 1.7770 0.24500 0.42700 0.18400 0.15700 0.12800 0.28600 /

After running the dynamic simulation on Psse. I try to recalculate the SPEED by using the swing equation on PSCAD. However, the result of mine and the result from Pss/e are different. This issue makes me confused about the swing equation. Could anyone pls help me? This is my calculation: d[deltaSPEED]/dt = (Pm - Pe)/(2 * 5.74)

How big is the difference? Is it a single generator system? How do you change Pe?

I can not share to you the result in here. However, the Pe is the sum of step change and initial power in the dynamic solution. For example. I set up the initial power = 0.5 and step change = 0.1, the Pe = 0.6, cuz when the system is stable Pm = Pe.

Are you using GSTR/GRUN in PSSE? What is the result in PSSE?

Hi Perolofl, would you send me your email? I will show you my calculation via the email. I am using the governor test. Even I used GSTR/GRUN (used the channel to get the SPEED, Pmech, PELEC), the result does not match when I applied the swing equation for each generator.