H5 Turbine Repair Presented on November 14 2022
11/9/2022
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Request for Purchase Order • IPL staff recommends approval of a Purchase Order to General Electric (GE) to inspect and repair the turbine section of Combustion Turbine H5.
11/9/2022
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CT H5 Turbine Vibration • One of our two gas fired turbines, most frequently called on by SPP • Unknown vibration in the turbine section, preventing it from reaching continuous operating speed • Manufactured and serviced by General Electric (GE) • Proposal provided by GE to repair the unit and return it to service.
11/9/2022
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GE 5000 Series Generator Rotor
11/9/2022
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GE 5000 Series Combustion Turbine
11/9/2022
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Repair H5 • Purchase Order request to include multiple contingencies depending on scope of work required as well as moving forward the next Major Inspection • GE representatives addressed the Council last year to provide technical expertise on GE Frame 5 Combustion Turbines and additional insight into the life expectancy of these units.
11/9/2022
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GE 5000 Series: Robust Workhorse • Life extension inspections: 5000 fired startups or 200,000 fired hours. • For comparison, H5 (2825 starts and 23,654 hours) H6 (2615 starts and 19,528 hours) • Approximately 3000 Frame 5 and Frame 3 turbines still in operation. • Approximately 60% of all Frame 5 turbines produced, still in operation
11/9/2022
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Increased wind turbine capacity contributes to volatility and price spikes when the wind drops off 140
14,000
120
12,000
100
10,000
80
8,000
60
6,000
40
4,000
20
2,000
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(20)
Price ($/MWh)
16,000
1:00 3:00 5:00 7:00 9:00 11:00 13:00 15:00 17:00 19:00 21:00 23:00 1:00 3:00 5:00 7:00 9:00 11:00 13:00 15:00 17:00 19:00 21:00 23:00
Generation (MW)
Wind Generation and Electricity Price (Typical 48h Period)
Wind Generation
11/9/2022
Electricity Price
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Growth of renewable-based capacity and volatility creates an opening for on system peaking units • Renewable resources (mostly wind turbines) account for growing share of SPP capacity – Renewables only produce when the wind is blowing and sun is shining
• SPP relies on other resources that can fill the gap left by renewables
• Baseload units (traditional coal plants) have trouble competing with renewables on a cost basis and can’t turn on/off quickly enough to meet demand when the price is right • Peaking units (natural gas turbines) ramp up quickly to provide electricity for short periods of time when electricity demand and price are high • Peaking units can fill gaps left by renewables, quickly and cost competitively
11/9/2022
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IPL CTs Support the Grid • Calendar Year 2022 – IPL diesel fueled turbines have been called on more than 150 times. • Generation credits with SPP (after fuel costs) have totaled almost $750,000 • Typically, H5 is called on before the other units and more often had it been available.
11/9/2022
10
Summary • Repair H5 Turbine and maintain asset benefits ▪ Maintain 17 MW of required Capacity ▪ Return a productive asset to operation ▪ Provide internal strength to IPL’s system Reliability and Resilience ▪ Keep options open for future decisions
11/9/2022
11
Questions ?
11/9/2022
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