Integrating Southwest Power Pool Wind to Southeast Electricity ...

is consistent with balancing costs seen in other wind integration studies, if somewhat on the low
side.
Table 5-12: Difference** in average generation for Scenario 1 vs. Scenario 1 Proxy
Change in
GW EES TVA SoCo SPP SERC W SERC E Total
CC (0.03) (0.04) (0.09) (0.93) 0.02 0.03 (1.05)
GT (0.00) 0.01 (0.02) (0.38) 0.02 0.03 (0.34)
Hydro - (0.00) 0.00 - - 0.00 (0.00)
Nuclear 0.00 - - 0.00 - 0.00 0.00
Steam
Coal
0.02 0.08 0.12 0.82 0.24 0.15 1.42
GasOil (0.03) - (0.00) (0.01) - 0.00 (0.04)
Wind - - - - - - -
Other 0.00 0.00 0.01 (0.02) 0.00 0.02 0.01
Total (0.04) 0.04 0.02 (0.53) 0.29 0.22 (0.00)
**Positive value represents increase in generation in Scenario #1 Proxy relative to Scenario #1.
Reserve Requirements and Provision
One of the significant differences in each of the High Wind Transfer scenarios is how reserves
are carried across the footprint. The changes in reserve requirements for each scenario are
presented in Chapter 3. This section examines how those reserves are provided in each of the
scenarios. Regulation up requirements and spinning reserve requirements were seen to be the
significant, and are examined here, together with total reserve requirements.
Regulation Up
The analysis of reserve requirements presented in Chapter 3 show that moving to larger areas
decreased regulation requirements, from an average of 2.2 GW in Scenario 1 to 2.1 GW in
Scenario 2 to 1.9 GW in Scenarios 3 and 4. Figure 5-13 shows the average allocation of
regulating up reserve by unit type for each of the scenarios. The first conclusion from this is the
importance of CC units to providing the regulating reserve needed, especially considering the
earlier point that some of these CCs may not be built if 48 GW of wind were to be installed.
Hydro units are also shown to be important, however, these are probably going to remain in
operation. Coal units provide less regulation in Scenario 3 as they provide more energy with the
reduced reserve requirements resulting in fewer online CCs. It can be seen that GTs are needed
in Scenario 2 to provide regulation offsetting some of the benefits of moving Scenario 1
regulation from SPP to other regions.
5-20