Barometric Pressure Pascals) Barometric Temp HPA ± 60 Pa Back Panel Temperature (Degree C) Temperature probe for back panel temperature ⁰C ± 1⁰ Of Array Irradiance Watts\Meter Sq. Pyranometer or Equivalent W/m² ± 25 W/m² Global Horizontal Irradiance Watts\Meter Sq. Pyranometer or Equivalent W/m² ± 25 W/m² Direct Irradiance Watts\Meter Sq. Pyranometer or Equivalent W/m² ± 25 W/m² Table 13.5.2 details the units and accuracy of measurements for telemetry data points to be sent to the CAISO in real time (i.e., 4 seconds) from solar EIRs, depending on the solar technology. Refer to Section 17.4 for detailed information. Irradiance Component Requirements Table 13.5.3 represents the minimum required (R) measurement of solar irradiance component and backplane temperature by solar generating technology. Direct Irradiance (DIRD) Global Horizontal Irradiance (GHIRD) Global Irradiance/ Plane of Array (PAIRD) Back Panel Temperature (BPTEMP) PV (fixed / horizontal / flat roof) R R Flat-Plat PV (fixed angle / azimuth tracking) R R Flat-Plate PV (DNI zenith & azimuth tracking) R R Flat-Plate PV (DNI zenith & azimuth tracking) R R Solar (thermal fixed angle mounted) R R Flat-Panel Thermal Collector (azimuth tracking) R R Low Concentrating PV (LCPV) R R High Concentrating PV (HCPV) R R
before any generation is intermingled with auxiliary MVAR. It may be calculated from other measured points as agreed to by the CAISO RIG Engineer (i.e., Net MVAR + Aux MVAR = Gross MVAR). of delivery Megavars (POD MVAR) Definition: This quantity is defined as the compensated, real-time of the reactive power (MVAR) at the point the Generating Unit connects to the CAISO Controlled Grid. It should align with the Point-of-delivery (POD) MVAR calculated or measured by the CAISO revenue meters. This value is either the actual or calculated value of the unit’s output at the point where the Generating Unit connects into the CAISO Controlled Grid. It must be a real time updated value and not averaged over time. This value is compensated for losses typically arising from the difference between the measured point and the delivery point (such as transformer losses, line losses, etc.). Purpose: POD MVAR is used to establish a generating site’s reactive power delivery to the system and the impact of the generating site on system voltage. It is used to verify the generating site’s operation within CAISO Tariff requirements for reactive power, and is used as an input to real time network model used for system reliability monitoring. Methods of providing this value: This value may be obtained by installing instrument devices at the POD. This value may also be calculated by providing an accurate conversion of another data point measured at the same voltage level as the POD. The value must represent an accuracy of +/-2% of the true value of POD MVAR represented in the CAISO revenue meter. Reactive (Net MVAR) Definition: This quantity is defined as the unit’s reactive output after subtracting the unit auxiliary reactive power load, but before subtracting the unit step-up transformer reactive power losses. Purpose: Net MVAR is used to determine the CAISO Balancing Authority Area's generation pattern used in the network model. Methods of providing this This value can be provided from instrument devices at the generating site or it may be calculated from other measured points as agreed to by the CAISO RIG Engineer (i.e., Gross MVAR minus Aux MVAR = Net MVAR). If Gross MVAR is equal to Net MVAR then Net MVAR is not required.