Explanation on MAXEX1

asked Jul 7 '19

VISHNU
11 ●3 ●4 ●5

Hi all,

I couldn't find any explanation on the MAXEX1 (over excitation limiter) on the PSSE documents.

Can anyone tell me what does the variable EFD_DES stands for?

What I understood is that it is the contant which should be multiplied with the rated EFD to get the limiting value of EFD (pu of rated) below which the MAXEX1 doen't operate. For example, if the rated EFD=3.3pu and EFD_DES=0.318, then the EFD limit is 1.05 pu of the rated EFD. Is this correct?

Thanks in advance.