Table 15 - System Dynamic Data

(based on reference 5)

Unit

group

Unit size

MW

Unit Type

MVA Base	Reactance, pu

Inertia

MJ/MW

Damping

Ratio
Unit

X'd	Transformer
U12	12	Oil/Steam	14	0 .32	0 .13	2 .8	0 .0
U20	20	Oil/CT	24	0 .32	0 .13	2 .8	0 .0
U50	50	Hydro	53	0 .28	0 .1	3 .5	0 .0
U76	76	Coal/Steam	89	0 .3	0 .13	3 .0	0 .0
U100	100	Oil/Steam	118	0 .32	0 .13	2 .8	0 .0
U155	155	Coal/Steam	182	0 .3	0 .13	3 .0	0 .0
U197	197	Oil/Steam	232	0 .32	0 .13	2 .8	0 .0
U350	350	Coal/Steam	412	0 .3	0 .13	3 .0	0 .0
U400	400	Nuclear	471	0 .4	0 .15	5 .0	0 .0

Notes:

1.	A classical model is assumed for each generator.

2.	Reactance and inertia data are typical of generators of the same type and the same size.

3.	Reactance values are based on the given MVA base.

4.	Inertia values are based on the unit size in MW.