MISO Dashboard

In its current state, it is possible for an Enode contained by a DRR CPNode in the MISO Commercial model to be designated as a ‘Dead Node’ by the network model if the load bus serving that asset is designated as a ‘Dead Bus’. Under these circumstances, SCED and other RT processes will treat the asset as “dead”, and no offers for Energy or Ancillary Services may clear for this asset. However, there are occasions where the physical facility representing the DRR1 asset is still connected via alternate live buses to the MISO system, - i.e., the Location associated with the DRR1 CPNode is still withdrawing power, and is therefore still capable of curtailment that could provide Energy or Ancillary Services to MISO. This, for example, can occur if a Transmission Owner is making a planned change to the load bus serving such a physical Location in the Network Model. If the Load Bus serving the Location’s Enode is placed on Outage or removed from the Network Model via Model Change Request (MCR), the Location will be classified as a ‘Dead Node’. However, the physical Location may be served by an alternative live load bus at an alternative Enode, and may still be energized. In this event, as the Location has been modeled only at its original Enode by the DRR AO, it will not clear any offers to provide Energy or Ancillary Services to the market via curtailment despite its ability to provide curtailment. Voltus is requesting a change to allow DRR assets to continue to provide Energy and Ancillary Services so long as they are energized and modeled by any Enode on a live bus.