Systems Engineering

An integrated set of disciplines that support the holistic structural transformation of legacy power systems to meet future policy and customer expectations.

Transmission-Distribution Interface (TDI)

The physical point(s) at which the upstream Bulk Power System / and a downstream Distribution System interconnect, typically at one or several major substations.    In a

Ultra-Large-Scale (ULS) System

Extremely large, and inordinately complex Systems that consist of an almost unparalleled volume and diversity of hardware and software, data storage and exchange, computational elements

Whole Grid Coordination

The means by which distributed grid elements are made to cooperate to solve a common problem—in this case, grid control. See also Laminar Coordination Framework.