Free sample: 2 of 45
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 Reliability Coordinator's tools have marked a group of Real-time measurements suspect. How must that be made known to the System Operator on shift?
- A. Through a daily summary sent by the modeling group
- B. Through a monthly data quality report to the Regional Entity
- C. Through a quality flag or color code on the display
- D. Through a note in the next shift turnover log
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Answer C Through a quality flag or color code on the display
IRO-018-1(i) Requirement R1 Part 1.2 requires provisions to indicate the quality of Real-time data to the System Operator, and the supplemental material offers display color codes and data quality flags as examples. A summary or report after the fact does not help the operator judge the assessment in front of them.
Reference: IRO-018-1(i) R1.2
A state estimator solution shows a real-power mismatch of 350 MW on a model carrying 42,000 MW of Load. As a share of modeled Load, that mismatch is closest to:
- A. 1.2 percent
- B. 8.3 percent
- C. 0.4 percent
- D. 0.8 percent
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Answer D 0.8 percent
350 divided by 42,000 is 0.00833, or about 0.8 percent. Reading it as 8.3 percent misplaces the decimal by a factor of ten, which would mean a mismatch of 3,500 MW.
Reference: Power system fundamentals
