Other Generator CostsStartup, VOM, Ramping& Forced Outage Rates

DWG MeetingOctober 22, 2013

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• Generator Cost parameters♦ Guidance from Intertek-APTECH♦ Startup and Cycling♦ Variable O&M♦ Ramping Penalty

Outline

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Generator Cost Parameters

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• Intertek-APTECH (APTECH) is a company that tracks generator maintenance costs.

• Under a joint agreement with WECC and NREL, APTECH extracted several costing values from their database♦ Startup costs (non-fuel)♦ Variable O&M♦ Ramping costs♦ EFOR

• Cost values were provided in 2011$

APTECH Generator Costs

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APTECH – Non-fuel Start Costs

Percentile

GroupDescription &

Sample Unit Size [##]Lower Bound Hot Warm Cold Hot Warm Cold

25th 79 112 87 15,800$ 22,400$ 17,400$ Median 94 157 147 18,800$ 31,400$ 29,400$ 75th 131 181 286 26,200$ 36,200$ 57,200$ 25th 39 55 63 27,300$ 38,500$ 44,100$ Median 59 65 105 41,300$ 45,500$ 73,500$ 75th 68 78 124 47,600$ 54,600$ 86,800$

25th 39 54 73 35,100$ 48,600$ 65,700$ Median 54 64 104 48,600$ 57,600$ 93,600$ 75th 63 89 120 56,700$ 80,100$ 108,000$ 25th 28 32 46 14,000$ 16,000$ 23,000$ Median 35 55 79 17,500$ 27,500$ 39,500$ 75th 56 93 101 28,000$ 46,500$ 50,500$ 25th 22 26 31 3,300$ 3,900$ 4,650$ Median 32 126 103 4,800$ 18,900$ 15,450$ 75th 47 145 118 7,050$ 21,750$ 17,700$ 25th 12 12 12 900$ 900$ 900$ Median 19 24 32 1,425$ 1,800$ 2,400$ 75th 61 61 61 4,575$ 4,575$ 4,575$ 25th 25 36 54 6,000$ 8,640$ 12,960$ Median 36 58 75 8,640$ 13,920$ 18,000$ 75th 42 87 89 10,080$ 20,880$ 21,360$

6Gas-fired simple cycle Aero-

Derivative[75]

7Gas-fired steam

[240]

3Large coal-fired

supercritical steam (500 - 1300 MW) [900 MW]

4Gas-fired combined cycle

[500 MW]

5Gas-fired simple cycle large

frame[150]

2Large coal-fired sub-critical

steam (300 - 900 MW) [700 MW]

Capital & Maintenance Non-fuel Start Cost EstimateRates ($/MW capacity) Cost for Sample Unit

1Small coal-fired sub-critical

steam (35 - 299 MW) [200 MW] Median – Cold

costs used in 2022 CC

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APTECH – Variable O&MGroup

Description & Sample Unit Size [##]

Percentile LB

Rates ($/MWh)

Annual Cost for Sample Unit

25th 1.52 2,316,845$ Median 2.82 4,298,357$ 75th 3.24 4,938,538$ 25th 1.62 7,407,806$ Median 2.68 12,254,890$ 75th 3.09 14,129,705$

25th 2.48 15,120,461$ Median 2.96 18,047,002$ 75th 3.40 20,729,664$ 25th 0.85 1,340,280$ Median 1.02 1,608,336$ 75th 1.17 1,844,856$ 25th 0.48 94,608$ Median 0.57 112,347$ 75th 0.92 181,332$ 25th 0.27 26,609$ Median 0.66 65,043$ 75th 0.80 78,840$ 25th 0.66 555,034$ Median 0.92 773,683$ 75th 1.42 1,194,163$

Baseload Variable Operating & Maint.

7Gas-fired steam

[240 MW @ 40% CF]

2Large coal-fired sub-critical

steam (300 - 900 MW) [600 MW @ 87% CF]

3Large coal-fired supercritical

steam (500 - 1300 MW) [800 MW @ 87% CF]

4Gas-fired combined cycle

[400 MW @ 45% CF]

5Gas-fired simple cycle large

frame[150 MW @ 15% CF]

6Gas-fired simple cycle Aero-

Derivative[75 MW @ 15% CF]

1Small coal-fired sub-critical

steam (35 - 299 MW) [200 MW @ 87% CF]

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APTECH Values for Startup and VOM

Group Description Hot (Hrs)

Warm (Hrs)

Cold (Hrs)

Startup Cost ($/MW-Cap)

Start Fuel (MMBtu/MW-

Cap)

Other Start Cost ($/MW)

Variable O&M

($/MWh)

1Small coal-fired sub-critical steam (35 - 299 MW)

< 4 4 to 24 > 24 151.65 9.33 8.20 2.91

2Large coal-fired sub-critical steam (300 - 900 MW)

< 12 12 to 40 > 40 108.32 14.00 10.47 2.76

3Large coal-fired supercritical steam (500 - 1300 MW)

< 12 12 to 72 > 72 107.29 20.10 11.95 3.05

4 Gas-fired combined cycle < 5 5 to 40 > 40 81.50 0.24 1.055 Gas-fired simple cycle large frame < 2 2 to 3 > 3 106.25 0.22 0.98 0.59

6Gas-fired simple cycle Aero-Derivative

0 0 to 1 > 1 33.01 1.53 1.96 0.68

7 Gas-fired steam < 12 12 to 48 > 48 77.37 8.92 11.80 0.95

Cold Start Values - Aptech

Comparison of Generator Parametersby Aptech Group (2012 $)

Used in 2022 CC .

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Ramp Costs

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Ramping costs from APTECH

TEPPC has not developed a strategy for applying ramping penalty costs. The issue is that significant ramping (down and up) of base load resources increases their maintenance costs and decreases time between maintenances. NREL used an iterative process to assign penalties.

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Comments and Questions