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Choosing a Max kWh for PV ESI IDs ERCOT Load Profiling March 26, 2008

Choosing a Max kWh for PV ESI IDs ERCOT Load Profiling March 26, 2008. Distributed Renewable Generation (DRG).

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Choosing a Max kWh for PV ESI IDs ERCOT Load Profiling March 26, 2008

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  1. Choosing a Max kWh for PV ESI IDsERCOT Load ProfilingMarch 26, 2008

  2. Distributed Renewable Generation (DRG) As recommended by the Distributed Generation Task Force: Small Profiled Distributed Renewable Generation should consist of… distributed renewable generation with a capacity less than 50 kW… Issue: Due to the settlement process of scaling the kWh consumption to a load profile, it is mathematically possible to scale up a load profile that incorporates a PV generation adjustment to the load shape, such that the scaled up shape results in a PV adjustment that is ≥ 50 kW.

  3. PV Generation – A Recap How much energy will a PV array produce? Given the currently known average Business PV generation capacity of 8.9 kW (AC),at 100% capacity factor there would be (8.9 * 24 =) 213.6 kWh generated per day. If we utilize a 20% capacity factor the estimated yield would be 42.7 kWh per day.

  4. Business – Photovoltaic (PV)

  5. Business PV – Building the Profile How would a daily PV load profile be derived? To build a PV profile for a specific profile type and weather zone, e.g., for PV ESI ID that is currently assigned BUSLOLF_NCENT: This PV profile can then be used in the Data Aggregation process. The kWh Gen (outflow to the grid) would be applied in settlement evenly across all days, spanning the intervals from 11:00 AM to 3:00 PM. 1. For a specific day, take the current BUSLOLF NCENT profile; 2. Multiply each value by 2.49 to scale it to the average BUS PV ESI ID ; 3. Scale it such that when the PV generation shape is applied in the next step the kWh will remain the same (multiply by 1.11); 4. Subtract the values of the PV generation shape (sine curve) to produce the BUSLOLF_NCENT load profile.

  6. Review of Process for Building BUSLOPV Profile

  7. BUSLOPV_NCENT - Max kWh Level

  8. Impact of the PV Generation Load Adjustment The smaller the magnitude of the load profile for the usage period, the smaller the ‘max’ kWh that can be profiled before the perceived PV adjustment to the loadequals or exceeds 50 kW. As the BUS Profile models are weather sensitive, the magnitude of the profiles will vary throughout the calendar year. Thus, the ‘max’ kWh that can be profiled so that the perceived PV adjustment to the load remains < 50 kW will be smaller during the milder, shoulder months.

  9. BUSLOPV How many customers’ ADU exceeded 3394 kWh in 2007?

  10. Summary Due to the significant variation through out the calendar year in the max level of kWh that can be profiled so that the perceived adjustment is < 50 kW, choosing a single max kWh value that is too high will result in usage periods where the perceived kWh adjustment is > 50 kW and choosing a kWh level that is too low will result in some ESI IDs being incorrectly not allowed to be assigned a PV profile.

  11. DRG Questions or comments?

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