What is a consequence of a transmission path operating past its long-term limits?

Operating a transmission path beyond its long-term limits can lead to serious operational concerns, particularly the increased likelihood of equipment failures due to overheating. When a transmission line is subjected to loads that exceed its designed thermal capacity, it can cause the conductors to heat up significantly. This elevated temperature can result in several detrimental effects including sagging of the conductors, which can create safety hazards, and a potential breakdown of insulation materials, leading to electrical faults. Moreover, prolonged exposure to high temperatures can accelerate wear and tear on the physical components of the transmission system, potentially causing failures or outages, which can disrupt the reliability of the energy supply.

While integration of renewable energy and regulatory compliance are positive aspects of the grid, they are not direct consequences of overloading transmission paths. Similarly, while enhanced grid resiliency is a goal for energy systems, operating past long-term limits does not contribute to this; rather, it poses risks that undermine grid reliability and safety.