SCG draft report on 2022 Common Case assumptions - Western ...

MWG: Modeling Work Group - The MWG evaluates and proposes improved models for production cost
simulation.
NERC: North American Electric Reliability Corporation - NERC is the electric reliability organization
certified by the Federal Energy Regulatory Commission to establish and enforce reliability standards for
the bulk-power system.
OTC: Once-Through-Cooling - To withdraw water using a single-pass system to cool power plant
processing equipment.
Path - Path, or Transmission Path, is a single or set of transmission lines with an established rating. There
are 66 WECC-rated paths in the Western Interconnection. Paths are analogous to the term “flowgate”
used in other parts of North America.
PCM: Production Cost Model - An analytic representation of an electrical generation and transmission
system used to determine the most efficient dispatch of generation to meet system loads within the
reliability constraints on power system operations.
RAS: Remedial Action Scheme - An automatic protection system designed to detect abnormal or
predetermined system conditions, and take corrective actions other than and/or in addition to the
isolation of faulted components to maintain system reliability. Such action may include changes in
demand, generation (MW and Mvar), or system configuration to maintain system stability, acceptable
voltage, or power flows. A RAS does not include (a) underfrequency or undervoltage load shedding or
(b) fault conditions that must be isolated or (c) out-of-step relaying (not designed as an integral part of
an SPS). Also called a Special Protection System.
Renewable Generation - Energy derived from resources that are regenerative or for all practical
purposes cannot be depleted.
ROW: Right of Way - A corridor of land on which electric lines may be located. The Transmission Owner
may own the land in fee, own an easement, or have certain franchise, prescription, or license rights to
construct and maintain lines.
RPS: Renewable Portfolio Standard - A regulation that requires an established level of production or
purchase of energy from renewable energy sources, such as wind, solar, biomass, and geothermal.
Scenario - A plausible future that is defined by various economic, social, political, and technological
factors.
<strong>SCG</strong>: SPG Coordination Group - Coordinates SPG activities of mutual interest related to TEPPC activities.
<strong>SCG</strong> Foundational Projects List - The <strong>SCG</strong> facilitated the preparation of and developed the criteria for the
<strong>SCG</strong> Foundational Transmission Projects List. The list identified projects having a high-probability of
being constructed by 2020. These projects provide an assumed minimum transmission system starting
point for TEPPC’s future planning studies, and are included as inputs into the WECC 10-Year Regional
Transmission Plan.
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