MODELING DG IN BASE CASES 1/24/2018

DPM Generator Modeling Guidelines Page 10 – 2018 DPM…… Modeling of generators shall comply with the following: If the individual-generator-unit capacity is 10 MVA or larger and the generator is connected to the WECC transmission system at 60 kV or higher, then submit steady-state data and dynamics data for each generator. If the aggregated-generator-unit capacity is 20 MVA or larger, the generators are connected to the WECC transmission system at 60 kV or higher, and it is not a collector-based generation facility− then submit steady-state data and dynamics data for each generator. (Wind and solar farms are examples of collector-based generation facilities.) If the aggregated-generation capacity is 20 MVA or larger, the generators are connected to the WECC transmission system at 60 kV or higher, and it is a collector-based generation facility− then submit steady-state data and dynamics data for the aggregated generation capacity as a single-unit generator model. All other generating facilities shall be netted with bus load in steady-state data and have their Non-Conforming Load Flag set appropriately. Steady-state and dynamic generator data shall be consistent.

Distributed Generation DG expected to be significant in future years (some states have RPS requirements for DG) DG can be any resource connected on the distribution grid – hydro, solar, energy storage etc Two types of DG - Utility scale (community solar etc). Historical output and location should be known - Commercial and residential. Historical output data may not be available Dynamic Model – CMPLDWG not approved for base case implementation by MVWG Implement Power flow model for now

DG Criteria Any member already modeling DG ? Criteria Used ? Power flow Model – Change existing Criteria? New Criteria? 1. Model DG if > a percentage of load Plot on next slide 2. Model DG > a set MW ? Different criteria for Utility scale and Residential/Commercial?

2018HS4.sav – Load Analysis X-axis: Load from 0 to 10MW Y-axis: count of loads above a MW value by area