Operational Requirements Unit Telemetry Visibility Each resource participating in the CAISO’s Ancillary Services markets or any Eligible Intermittent Resource or any resource providing Energy with a capacity of 10 MW or greater that is not exempt pursuant to the CAISO Tariff must provide telemetry data according to the point matrix specified in Section 7. This BPM will be revised should additional data points be required, pursuant to CAISO Tariff Section 7.6.1(d). Performance Monitoring Direct Telemetry Timing Requirements The timing diagram (Figure 1) the performance and timing requirements a Generating Unit connected to the CAISO EMS must meet. A Generating Unit must be able to accept and processing direct digital control (DDC) signals (Set Point) within the CAISO time standard (two-second maximum from CAISO’s EMS to output of RIG). The two-second maximum includes any Generator or “third party” owned communication equipment located between the CAISO ECN and Generating Unit. A Generating Unit must be able to send SCADA data to the CAISO within the CAISO time standard (two seconds from the input of the RIG to the CAISO EMS). The governor or controller must receive the signal from the RIG within the CAISO time standard (another two seconds from output of RIG to governor controller). The time standards also apply in the return direction resulting in a total maximum of eight seconds round trip for the signal to travel from the CAISO EMS to the Generating Unit governor controller and back. The timing requirements from the CAISO EMS to the plant control system (e.g. DCS, RTU) through the use of non-CAISO communication equipment must meet the CAISO two second time standard in one direction. The timing requirements from the plant control system back to the CAISO EMS through the use of non-CAISO communication equipment must meet the CAISO two second time standard in the return direction. PDR Timing Requirements The provisions of Section 6.2.1 shall apply to PDR telemetry, except that all references to timing in Section 6.2.1 are increased to one minute.
The CAISO has information security documents relevant to each project. The following security documents and links to additional security requirements are incorporated into this BPM. For further information and reliability requirements please contact the CAISO Network Security. Basic Assurance Certification Practice Statement (CPS): The ECN Connectivity Requirements link is: Network Connectivity Security Requirements and ECN Agreement: Real-time Point Definitions The resource owner is responsible for correctly providing all required points at the accuracy herein. ANALOG VALUES Megawatts (Gross MW) Definition: This quantity is defined as the resource’s real power output, before subtracting the auxiliary real power load or step-up transformer real power losses. Purpose: Gross MW is used to determine the CAISO Balancing Authority Area's generation pattern in the network model. Methods of providing this value: This value can be provided from instrument devices at the resource site (accurate transducers), at the Generating Unit terminals/low side of the step-up transformer, before any generation is intermingled with auxiliary load. It may be calculated from other measured points as agreed to by the CAISO RIG Engineer (i.e., Net MW plus Aux MW = Gross MW). Net Megawatts (Net MW) Definition: This quantity is defined as the resource’s real power output measured at the low side of the step up transformer after the auxiliary transformer if applicable. Or the quantity available after subtracting the unit auxiliary real power load, but before subtracting the unit step-up transformer real power losses. Purpose: Net MW is used to determine the CAISO Balancing Authority Area's generation pattern used in the network model.