If a transmission line has a System Operating Limit (SOL) of 650 MWs and a firm transaction scheduled will load it to 665 MWs, how much of the non-firm transactions must be cut?

If a transmission line has a System Operating Limit (SOL) of 650 MWs and a firm transaction scheduled will load it to 665 MWs, how much of the non-firm transactions must be cut?

• A. 15 MWs
• B. None. The firm transaction will not flow since the non-firm transactions were in place first.
• C. 75 MWs
• D. 30 MWs

Answer: (C)

The correct answer is determined by understanding the relationship between the scheduled transactions and the System Operating Limit (SOL) of the transmission line. The SOL in this case is established at 650 MWs, which represents the maximum load that the transmission line can safely handle. When a firm transaction is scheduled to load the line to 665 MWs, this exceeds the SOL by 15 MWs (665 MWs - 650 MWs = 15 MWs). To ensure the reliability of the grid and prevent overload situations, it’s necessary to adjust the non-firm transactions. Non-firm transactions are those that can be curtailed, as they do not carry the same priority as firm transactions, which are guaranteed to flow as scheduled. To accommodate the firm transaction and maintain the line's safety within the SOL, the total excess load of 15 MWs must be reduced from the non-firm transactions. Therefore, the entire amount beyond the SOL can be cut from the scheduled non-firm transactions, which results in needing to remove 15 MWs from the non-firm transactions to allow the firm transaction to proceed safely at the maximum allowed limit. However, the interpretation of the question involves recognizing that, to fully comply with operating parameters,

The correct answer is determined by understanding the relationship between the scheduled transactions and the System Operating Limit (SOL) of the transmission line. The SOL in this case is established at 650 MWs, which represents the maximum load that the transmission line can safely handle.

When a firm transaction is scheduled to load the line to 665 MWs, this exceeds the SOL by 15 MWs (665 MWs - 650 MWs = 15 MWs). To ensure the reliability of the grid and prevent overload situations, it’s necessary to adjust the non-firm transactions.

Non-firm transactions are those that can be curtailed, as they do not carry the same priority as firm transactions, which are guaranteed to flow as scheduled. To accommodate the firm transaction and maintain the line's safety within the SOL, the total excess load of 15 MWs must be reduced from the non-firm transactions.

Therefore, the entire amount beyond the SOL can be cut from the scheduled non-firm transactions, which results in needing to remove 15 MWs from the non-firm transactions to allow the firm transaction to proceed safely at the maximum allowed limit.

However, the interpretation of the question involves recognizing that, to fully comply with operating parameters,