Upcoming Projects

PSP Ashokan Pumped Storage

Located in upstate NY using the Ashokan reservoir and proposes an alternative for the construction of an upper reservoir with a total area of 226 acres and a volume of  25,558 acre-ft that can be built in the surrounding area, as can be seen in figure 1. The proposed interconnection uses 230kV transmission lines linking the new substation with the existing Hurley Av. Substation as shown in Figure 1.  According to our reservoir alternative, the project could generate the following:


Table 1.- Features Pumped Storage

OPTION 1

Ashokan Reservoir Available Volume:

15,787 acre-ft

Ashokan Reservoir Level Variation:

2 ft

Reservoir

Gen time (h)

Power (MW)

Head (ft)

Upper Reservoir-Ashokan

6

1,200

594

 

OPTION 2

 

Reservoir

Gen time (h)

Power (MW)

Head (ft)

Upper Reservoir-Ashokan

4

2,000

594

OPTION 3

Reservoir

Gen time (h)

Power (MW)

Head (ft)

Upper Reservoir-Ashokan

12

700

594




Table 2.- Estimated Pipe Lengths Pumped Storage for Option 1

 

Diameter (ft)

Length (mi)

Headrace Tunnel

47

0.38

Vertical Shaft

42

0.09

Horizontal Tunnel

42

2.64

Penstocks

27

0.04

Tailrace Tunnel

50

0.55

 

For supply 1,200 MW and 2,000 MW when it is necessary (pumping 1,680 MW and 2,800 MW, respectively) so we need 5 new pump-turbine generator-motor sets. Each unit would have a nominal rating of 560 MW. A longer duration of pump storage operation or energy storage is possible, but it could affect the level of the Ashokan Reservoir beyond the 2ft maximum we propose.

The area shown in Figure 1 is near Catskill Park and there is an extensive forest and wild area, so we have taken all necessary measures to avoid interfering with the wilderness by locating our proposed upper reservoir away from natural areas also doing undergrounding the connections between reservoirs to not interfere with landscapes as shown in Figure 2 in this way the consortium provides an eco-friendly solution.

Figure 1.- Proposed Pumped Storage Layout
Figure 2.- Proposed Pumped Storage Section view

ISABELLA PUMPED-STORAGE PROJECT

ABOUT THE PROJECT
The proposed Isabella Pumped Storage Project would be located 40 miles northeast of Bakersfield, California in the Kern County. The project concept envisions the construction of a pumped-storage power plant facility with a capacity of 2,000 MW. The project proposes to use the existing Isabella reservoir as a lower pool and a new reservoir in the Southern Sierra Nevada Mountains to serve as the upper pool. The proposed Project would operate in a closed-loop. Aside from evaporation and percolation losses, the project’s water would stay within the system.

Description

Reservoir Dam

Dam Crest Elev. [ft]

Dam Height [ft]

Dam Length at Crest [ft]

Year Completed

Composition

Isabella Reservoir (Existing)

Main Dam

2,633

185

1,695

1,953

Earthen

Auxiliary Dam

2,635

100

3,160

1,953

Earthen


The powerhouse location will depend on the upper reservoir alternative, as shown in exhibit 3. The approximate floor level would be between 200 ft and 300 ft below ground level. The cavern will be stabilized with high strength projected concrete (shotcrete) and the powerhouse will include steel formwork and concrete, as necessary. The tentative dimensions for powerhouse are 500 ft long, 125 ft wide, and 150 ft high. Adjacent to the powerhouse will be the cavern of the transformers chamber, which will also be stabilized with high strength shotcrete. This chamber will possess tentative dimensions of 165 ft long, 60 ft wide, and 50 ft high. The generating/pumping units, electrical switchyards, interconnecting transmission lines, and other appurtenant facilities would complete the project.

The proposed Isabella Pumped Storage Project is expected to have a rated capacity at 2,000 MW. It would interconnect with the existing Southern California Edison (SCE) or Pacific Gas and Electric (PG&E) transmission grid to provide energy storage to renewable resources. Additionally, other electrical utilities in California are expected to be interested in the project as a resource for storing and maximizing renewable energy use.



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