Glossary - m

For your convenience, this page contains an alphabetically organized list of terms, definitions and common acronyms used in the electric utility industry.

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Term/Acronym

Definition
MCP Market Clearing Price
MCPC Market Clearing Price for Capacity
MCPE Market Clearing Price for Energy
Maintenance Outage See Outage
Market Clearing Price for Capacity The highest price associated with a Congestion Zone for a Settlement Interval for Ancillary Service capacity awarded in each Ancillary Services capacity procurement run by ERCOT. There will be a separate Market Clearing Price for Capacity for each Ancillary Services capacity market.
Market Clearing Price for Energy The highest price associated with a Congestion Zone for a Settlement Interval for Balancing Energy deployed during the Settlement Interval.
Market Implementation Plan Plan developed by ERCOT that addresses training, testing, qualification, and registration of Market Participants for participation in the Customer Choice Pilot, as well as the conversion to single Control Area operations.
Market Information System (MIS) An electronic communications interface established and maintained by ERCOT that provides a communications link to Market Participants, including secure access by and communications to individual Market Participants regarding information linked to each individual Market Participant.
Market Participant An Entity that engages in any activity that is in whole or in part the subject of these Protocols, regardless of whether such Entity has executed an Agreement with ERCOT.
Market Segment The Segments defined in Article 2 of the ERCOT Bylaws. The segments are:
  1. Independent REPs,
  2. Independent Generators,
  3. Independent Power Marketers,
  4. Investor Owned Utilities,
  5. Municipals,
  6. Cooperatives, and
  7. Consumers.
Market Solution A Market Solution exists when at least three unaffiliated Resources, with capacity available, submit bids to ERCOT that can solve a circumstance of local Congestion and no one bidder is essential to solving the Congestion.
Mass Drop The immediate cessation of service by a CR to all ESI IDs served by the CR.
Merit Order The ranking of Resources as a direct function of the monetary bid from those resources.
Messaging System The ERCOT-to-QSE communications system used to send Real-Time notices and Dispatch Instructions to the QSEs.
Meter Data Acquisition System The system to obtain revenue quality meter data from ERCOT Polled Settlement meters and Settlement Quality Meter Data from the TDSP for settlement and to populate the Meter Data Aggregation System and ERCOT Data Archive.
Meter Data Exchange Format The format for submitting meter data to, or receiving data from, ERCOT Settlement Agent.
Meter Data Request Format The format for requesting Settlement Quality Meter Data from the ERCOT Settlement Agent.
Metering Facilities Revenue Quality Meters, instrument transformers, secondary circuitry, secondary devices, meter data servers, related communication Facilities and other related local equipment intended to supply ERCOT settlement quality data.
Mismatched Schedule Processing Fee The fee charged to a QSE that fails to correct a mismatched schedule in a timely manner.
MOU Municipally Owned Utility
Municipally Owned Utility A utility owned, operated, and controlled by a municipality or by a nonprofit corporation, the directors of which are appointed by one or more municipalities.