Evaluation of direct methods for power system stability analysis

Abstract

In  our  paper  we  briefly  summarize  the  physical  concept,  calculation  method  and  application  possibilities  of  a  selected   stability   index   that   is   described   in   detail   in   the   references.   We   publish   our   results   of   examination   of   the   informational  value  and  reliability  of  the  different  indices.  Method  of  the  examination  was  a  comparison  of  the  index  values  and  critical  clearing  time  values  (obtained  by  time-domain  numerical  simulation)  calculated  for  several  typical  fault  cases  on  a  small  but  realistic  sample  network.  Aim  of  our  work  is  to  develop  methods  for  filtering  stability  calculation  cases  for  network  development  planning  and  to  provide  a  possibility  of  real-time  stability  monitoring  for  power  system  dispatcher use.