Once a premise has implemented information on the power factor recorded at the time of the highest 15-minute demand interval, actual demand will be provided every meter reading cycle.
Mike M., Oncor Demand Expert
The current month's power factor adjustment will only affect the current month’s billing and will not affect future month’s power factor adjustments. A power factor reading will be taken each month from power factor capable meters at the time of the highest 15-minute peak demand.
Power factor adjustments will be made to the billed demand (current month's 4CP, NCP and billing kW) currently used by Oncor in its billing process and transmitted to retail electric providers. Power factor adjusted bills will simply have the billed demand adjusted upward by the ratio of expected power factor (.95) to actual power factor recorded at the highest 15-minute demand interval.
To qualify for implementation, power factor capable metering must be in place and functioning for at least one complete meter reading cycle. The premise also is qualified for implementation based on the plan to implement in descending demand order.
As IDR power factor meters are installed and data become available, it will be posted on the Oncor IDR Meter Data Portal. Power factor data will appear in the final column of the file as kvarh. If only one column of data is present (kWh), then power factor data are currently not available.
Yes. However, power factor varies over time relative to electric devices in use and their load characteristics at the time of measurement. The power factor measurement used for billing purposes is the average power factor for the 15 minutes during the peak kW demand.
No. This is a competitive energy service that Oncor is unable to provide in accordance with Substantive Rule §25.343. Power factor varies over time relative to electric devices in use and their load characteristics at the time of measurement. The measurement used for billing purposes is the average power factor for the 15 minutes during the peak demand and cannot be determined by an instantaneous reading. Customers may want to check with their retail electric provider for recommendations on power factor correction.
The current EDI market transactions provide fields for kvarh, kWh, billing demand and power factor. The power factor is passed to retail electric providers in the monthly 867-03 and the 867-02 historical usage EDI transactions. The power factor value is reported as a decimal; i.e. .935.
No. The current tariff in effect for Oncor does not provide for power factor billing adjustments for non-demand metered customers.
The current approved Oncor tariff permits application of a power factor billing adjustment to any demand metered premise where the power factor as measured at the retail customer's meter is less than 95% lagging.
A description of the adjusted billing demand can be found in the Oncor Tariff, Section 5.5.5 – Power Factor (page 58). The calculation of the power factor adjustment is noted in the following example:
-Mike M., Oncor Demand Expert
