What does "Transmission Capacity" refer to?

Transmission capacity specifically refers to the maximum load that a transmission line can carry without exceeding its thermal limits. This is critical in ensuring the safe and reliable operation of the electrical grid. If a transmission line approaches or exceeds its capacity, it can lead to overheating and potential failure of the line, which can cause blackouts or equipment damage.

Understanding transmission capacity is essential for system operators as it directly impacts their ability to deliver electricity effectively and maintain system stability. Balancing the load within the capacity limits helps prevent overload conditions, ensuring that the transmission network operates safely and efficiently.

Other choices might touch on various important aspects of transmission operations, but they do not define "Transmission Capacity" accurately or relate directly to the concept of how much electric current a transmission line can sustain safely.