OP J2:VIII

Question 1

OP J-2:VIII

What two things are required to make 500 kv OPERABLE?

Answer 1

• 500 kv connected to grid by one of three lines (golden triangle)
• switchyard voltage > 512 kv

Question 2

OP J-2:VIII

Describe power limits during 500 kv line outages:

one line out?

two lines out?

Answer 2

one line out (SPS out of service)

• Voltages 24.375 to < 25 kv ==> 1800 MW
• Voltages > 25 kv ===> 2000 MW

one line out (SPS in service)

• no limitations

Two lines out (SPS irrellevant)

• 1600 MW

Question 3

OP J-2:VIII

What makes 230 kv INOPERABLE?

Answer 3

LTC in manual

52 VU 11 closed (SU bus x-tie)

voltages not in accordance with table