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Distributive Generation

Distributive Generation. Landfill. Wind. Solar. Micro-Turbine. Fuel Cell. CPS Energy Generation. Major Issues and Trends. Texas has net metering law in place since 1986 for renewables only.

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Distributive Generation

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  1. Distributive Generation Landfill Wind Solar Micro-Turbine Fuel Cell

  2. CPS Energy Generation

  3. Major Issues and Trends • Texas has net metering law in place since 1986 for renewables only. • On Feb 4 1999, the Public Utility Commission of Texas adopted interconnection guidelines for distributed generation and requested that staff continue its investigation of distributed resources • The costs of interconnection with CPS Energy can get expensive. System upgrades are borne by the Customer, such as service line and/or meter facilities, conductor, communications, SCADA equipment, etc. required for the interconnection. • High Voltage readings at interconnection point • Micro turbine and Fuel Cell projects have shown to be too expensive to maintain • Solar – estimated payback is 20yrs Trends • Landfills receive over 5,100 Tons of garbage daily, with decomposition in about 5-6 yrs. Covel location expected to double its generating capacity. • Wind continues to be a dominant source of renewable DG, with another 130 MW coming on-line.

  4. Volume of Requests Requests have been minimal • 3 Landfill Projects • Tessman Garden (4.8MW) • Covel Garden (9.6MW) • Nelson Garden (3.0MW) • 1 Fuel Cell • 1 Micro turbine (80kW) • 4 Solar (private customer, Institute of Texan Culture & CPS Energy – 40kW) • Wind (260MW)

  5. Overall Process • The electrical generation equipment must be powered by renewable energy sources: • The sun (directly or indirectly) • Wind • Geothermal sources • Biomass and/or biomass-based waste products (including landfill gas) • Customers interested in DG must fill out an application. • CPS Energy issues a study fee to applicant • CPS Energy determines if circuit upgrades are needed (if so, upgrade costs are added to Agreement) • Application is approved and agreement is submitted to Applicant • After Agreement is signed by applicant, upgrades to distribution circuit are performed, including communications, SCADA, protective relaying, & metering • Once Commissioning Tests are conducted, DG is approved for operation • CPS Energy will ensure that the required DG safety devices are operating properly. These devices provide safety to our personnel who are performing maintenance on distribution facilities. All customer equipment -- up to the service point -- will be inspected by the City of San Antonio to ensure compliance with City of San Antonio codes.

  6. Unusual Installations • San Antonio Water Systems (SAWS) proposing a DG project at a sewer treatment plant. Fuel source – Methane Gas • Fuel Refinery – proposing a 10MW DG project. Fuel source - a product of hydrogen that would be combined with LP gas • Engine Testing Laboratory – various size engines (lawnmower to diesel trucks) that when attached to a generator, the load generated by the engine is dumped onto the distribution grid

  7. Landfill Gas Projects Covel Garden Landfill 6 – 1.3 MW Units 9.6 MW Total Nelson Garden Landfill 2 – 1.5 MW Units 3.0 MW Total

  8. What’s Next? Landfill Wind Solar Micro-Turbine Fuel Cell

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