Free sample: 2 of 36
Answer each one before you open the explanation. On the exam there's no explanation, and you have about 77 seconds a question on RC and BT, 90 on TO and BI.
A Balancing Authority forecasts a peak Demand of 8,650 MW for tomorrow evening and must carry 450 MW of Contingency Reserve. Capacity available for that hour is 8,900 MW. What is its position?
- A. 250 MW above Demand plus reserve
- B. 450 MW short of Demand plus reserve
- C. 200 MW short of Demand plus reserve
- D. 700 MW above Demand plus reserve
Show the answer
Answer C 200 MW short of Demand plus reserve
Required capacity is 8,650 + 450 = 9,100 MW, and 8,900 - 9,100 = -200 MW, so the hour is 200 MW short. The 250 MW surplus answer comes from comparing capacity with Demand alone and forgetting the reserve obligation.
Reference: TOP-002-4 R4 Part 4.4; Control-room operating practice
During a capacity shortfall a Transmission Operator implements a system-wide voltage reduction of 4% to maintain continuity of the Bulk Electric System. Under EOP-004-4, this event must be reported by
- A. the Balancing Authority, by the later of 24 hours or the next business day
- B. the Reliability Coordinator, within 30 minutes of starting the voltage reduction
- C. the Distribution Provider, within 30 minutes of starting the voltage reduction
- D. the Transmission Operator, by the later of 24 hours or the next business day
Show the answer
Answer D the Transmission Operator, by the later of 24 hours or the next business day
EOP-004-4 Attachment 1 makes a system-wide voltage reduction of 3% or more a reportable event and names the Transmission Operator as the reporting entity, since it is the entity that implements the reduction. Requirement R2 sets the deadline at the later of 24 hours from recognizing the threshold or the end of the next business day; the Balancing Authority's report covers a public appeal for load reduction instead.
Reference: EOP-004-4 R2; EOP-004-4 Attachment 1
