Integrating Southwest Power Pool Wind to Southeast Electricity ...

decreasing smaller amounts. It is interesting to note that, even though the wind is committed day
ahead in only the Entergy, SBA and TVA regions of SERC, the other SERC regions also end up
decreasing generation in the economic dispatch phase, as it is less expensive to the entire system
that they do so.
Figure 5-1
Effect of wind on system; blue indicates and increase in generation, orange a decrease in
generation
Considerations for SPP Providing All Within-Hour Balancing for Scenario #1
The model does not show that Scenario #1, where SPP provides the within hour balancing for all
48 GW of wind, results in a loss of load reliability issue, as may have been expected when a
system with a peak of 55 GW has to manage almost 48 GW of installed wind. Although initially
unexpected by the project team, after consideration of the results, the following reasons for this
result are provided:
• High reserve margin modeled. The planned generation for the Non-RES case is
maintained for the high wind generation cases such that no plant is assumed to be retired
despite the large increase in wind generation installed as we move from the 7 GW to 48
GW case. Therefore, SPP is left with large amounts of resources, both to meet energy and
reserve requirements. Even not considering wind, it still has a reserve margin of 20%
above peak demand (and as has been shown in the past, wind will have some capacity
credit).
• Availability of reserve capable generation. Although the regulation requirements
increase to 1.6 GW and spinning reserve increased to 3 GW, there is 4.5 GW of
regulation capacity and 9.5 GW of spinning capacity. Although some of these capacities
overlap, sufficient reserves are available assuming that the commitment and dispatch
select the appropriate resources for providing energy and leaving available capacity on
5-3