L
live11
In a gas power plant There are 2 main transformers ( st1 , st2 ) taking from the grid 380 kv and step down to 13.8 kv ,and then feeding the main bus which it is divided into 2 buses ( A Feed by st1 , B Feed by st2 ) between them bus tie
st1 = 380 kv/13.8 kv
st2= st1
Bus A feeding gas compressor (1, 3,5 ) by 13.8 kv , in addition h2 plant , admin building and ccb
Bus B feeding gas compressor (2,4,6) by 13.8 kv , same above
gas compressor : OP=5200KW , I=260.2 normal operation and for starting current 4.5*260.2
and the voltage is 13.8kv
our problem ( at starting operation of gas compressor there is a drop of voltage accured for 20 second to admin building , central control building , h2 plant )
how can avoid this drop and calculate it
do you think it is from the cables ? if yes how can calculate it since i now cables size , material inside etc
