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Metering and telemetry ensure operational accuracy

Accurate metering of electricity generated or consumed provides key data inputs for accurate settlement calculations. Direct measurement of a generator or load participant through telemetry allows the ISO to manage and monitor power generation in real-time.

Process and requirements

Operating procedures - 5700 metering process

Meter data represents the energy generated or consumed during a settlement interval. The ISO, ISO metered entities, and scheduling coordinator metered entities follow prescribed processes and procedures to ensure the data is settlement quality. These procedures complement, but do not replace, section 10 of the ISO Tariff and Business Practice Manual for Metering.

Meter installation, inspection and certification

Additional information, required forms and lists for metered entities

  • Settlement quality meter data plan affirmation and scheduling coordinator self-audit attestation
    Scheduling coordinators must annually complete a self-audit of settlement quality meter data (SQMD) processes. This requires examining meter data processes to demonstrate appropriate controls for accurate reporting.
  • Qualified reporting entity
    The role of the Qualified Reporting Entity (QRE) is to submit meter data associated with renewable energy on behalf of ISO Metered Entities (ISO polled) using the WREGIS application. Generator Owner/Agent needs to complete, sign, and submit original hard copies of the Service Request Form and Service Agreement to begin the QRE process with the California ISO.
  • Station power program
    Station power — the energy used to operate auxiliary equipment and other load that is directly related to the production of energy — can be converted from retail service to wholesale service.
  • Market Results Interface - Settlements (MRI-S)

Direct telemetry standards

Generating units and load participants must establish and maintain a data processing gateway between plant facilities and the ISO energy management system for the purpose of generation control and monitoring. The ISO requires direct telemetry of participating generators and load by installing a remote intelligent gateway (RIG) for generating units providing regulation energy or a data processing gateway (DPG) or other ISO-approved technology for resources providing non-regulation ancillary services or supplemental energy.

Application access

The ISO and its market participants must adhere to rigorous requirements to help ensure the integrity and confidentiality of commercially sensitive or proprietary information and data, as well as to protect the ISO grid and its assets.