CEC/CPUC Energy Storage Workshop LADWP Pumped Hydro John R. Dennis LADWP Director Power Planning & Development November 20, 2015 1.

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Presentation transcript:

CEC/CPUC Energy Storage Workshop LADWP Pumped Hydro John R. Dennis LADWP Director Power Planning & Development November 20,

LADWP Pumped Hydro 2 Competitive Rates  History LADWP & DWR: Agreement / Built 1972 – 1978 Major repairs: 2004 – 2013 turbines, stators, transformers …  Function DWR – water conveyance & energy LADWP – peaking, regulation, reserves  Capacity 6 reversible pump turbine / generators – 271 MW each 1 conventional pelton turbine – 56 MW Hydraulic head – 1063 Feet (upper reservoir to plant) Net Dependable output - 1,175 MW (tunnel limit)

LADWP Pumped Hydro 3 Competitive Rates  Generation Originally planned as a “sister” to a nuclear plant Couples well with large thermal units for peaking /cycling  Regulation Typical to operate 1 to 2 units in condense mode  Pump Balancing net water flows with economics and reliability Full pump only – appr. 240 MW (no partial pump capability)  Contingency Reserves Provides system value in spin and non spin

LADWP Pumped Hydro 4 Competitive Rates  Future Usage – similar as past: Over Generation Load Following Regulation / System Inertia Contingency Reserves  Fleetwide changes Refurbish U7 & Plant Automation Rebuilding for operational flexibility

LADWP Pumped Hydro 5 Competitive Rates Potential overgeneration primarily in winter and spring

LADWP Pumped Hydro 6 Competitive Rates  Questions ?

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