The ACCC® conductor is ideally suited to upgrade existing transmission lines due to its mechanical strength, thermal stability, and improved conductivity compared to any other conductor type of the same diameter and weight. When increased current is fed through a conductor, its temperature rises. As its temperature rises, the core and aluminum strands expand causing the conductor to sag. While most of the conductors used in the United States are ACSR “Aluminum Conductor Steel Reinforced,” they are typically limited to continuous operating temperatures of 100°C, and emergency operating temperatures vary by customer.
The ACCC® carbon fiber composite core conductor offers a less expensive alternative to increasing line capacity, as it can be installed without requiring any structural modifications to existing structures. An ACCC® conductor of the same size, weight, and diameter can operate at much higher temperatures and carry more current without exhibiting significant thermal sag.
The ACCC® conductor is also ideally suited for new installations, as its improved conductivity (decreased electrical resistance) compared to other conductors of the same diameter and weight also reduces line losses by well over 30% under equal power flow conditions. This improved efficiency can have a profound net effect on overall system performance, improve the economics of a renewable resource by delivering more power using fewer turbines or solar panels (for example), decrease generation requirements, and even reduce fuel consumption and associated emissions for coal and natural gas fired plants. The use of the ACCC® conductor on new transmission lines can also help reduce upfront capital costs as the ACCC® conductor’s greater strength can allow it to span greater distances thereby reducing the number and/or height of towers and poles. A reduction in the number or height of structures offers several economic and environmental advantages.