WECC Variable Generation Planning Reference Book: Appendices

Abstract

Term Abbreviation Definition Aluminum Conductor Steel Reinforced ACSR Aluminum conductor steel reinforced (or ACSR) cable is a specific type of high-capacity, highstrength stranded cable typically used in overhead power lines. The outer strands are aluminum, chosen for its excellent conductivity, low weight and low-cost. The center strand is of steel for the strength required to support the weight without stretching the aluminum due to its ductility. This gives the cable an overall high tensile strength.[Wikipedia] Aluminum Conductor Steel Supported ACSS ACSS is a composite concentric-lay stranded conductor. Steel strands form the central core of the conductor with one or more layers of aluminum wire stranded around it. The steel core carries most or the entire mechanical load. Ace Diversity Interchange ADI ADI or ACE diversity interchange is the pooling of area control errors (ACE) to take advantage of control error diversity (imbalances of generation and load). American Electric Power AEP American Electric Power is one of the largest electric utilities in the United States, delivering electricity to more than 5 million customers in 11 states. Alkaline Fuel Cells AFC AFCs consume hydrogen and pure oxygen producing potable water, heat, and electricity. They are among the most efficient fuel cells, having the potential to reach 70%. [Wikipedia] Automatic Generation Control AGC Generation equipment that automatically responds to signals from the EMS control in real-time to control the power output of electric generators within a prescribed area in response to a change in system frequency, tie line loading, or the relation of these to each other to maintain the target system frequency and/or the established interchange with other areas within the predetermined limits. Artificial Intelligence AI Artificial intelligence (AI) is the intelligence of machines and the branch of computer science that aims to create it. Adequate Level of Reliability ALR A set of 6 reliability characteristics established by NERC in (NERC 2007). Audible Noise AN Corona discharge may cause audible noise, and it is frequently generated from wet conductors of high-voltage.