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The Nellis Solar Power Plant is a 14-megawatt (MW) photovoltaic power station located within Nellis Air Force Base in Clark County, Nevada, northeast of Las Vegas. The power plant was inaugurated in a ceremony on December 17, 2007, with Nevada Governor Jim Gibbons activating its full operation. On average, it has since generated 32 gigawatt-hours of electricity annually and supplied more than 25% of the power used at the base.〔(Largest U.S. Solar Photovoltaic System Begins Construction at Nellis Air Force Base )〕〔(Air Force Switches on Largest Solar Power Plant )〕 Occupying of land leased from the Air Force at the northeastern corner of the base, this ground-mounted solar system employs an advanced sun tracking system, designed and deployed by SunPower. The system contains approximately 70,000 solar panels, and the peak power generation capacity of the plant is approximately 13 MWAC.〔 This means the ratio of average to peak output, or capacity factor, of this plant is around 22%. The energy generated will support more than 12,000 military and civilians at Nellis who are responsible for Air Force advanced combat training, tactics development and operational testing. Construction began on April 23, 2007,〔 and operation of the first 5 MW began on October 12, 2007.〔(Solar panels connect to base electric grid )〕〔(eXenewable Project Profile Page - Nellis, NV, US, PV )〕 == Economics == Under the terms of the Power Purchase Agreement, MMA Renewable Ventures, who own the panels, is leasing the land at no cost and Nellis is agreeing to buy the power for 20 years at about 2.2 cents/kW·h, instead of the 9 cents they are paying to Nevada Power, saving the Air Force $1 million each year. None of the $100 million cost came from the Air Force, but instead from subsidizing taxpayers and Nevada Power customers who are paying for the RPS credits.〔(Solar panels at Nellis could be win-win )〕 The partners were able to build the plant, recover costs and produce electricity at a savings, because of the fairly complex financing structure arranged among MMA, its investors, Nevada Power, and Nellis — in addition to multimillion-dollar government incentives.〔(Construction starts on world's largest solar array )〕 The plant was expected to produce 30 GWh per year but actually produced about 32 GWh the first year, 8% more than expected,〔(Nellis Air Force Base solar array provides model for renewable projects )〕 saving the Air Force $1.2 million in the first year of operation.〔(President Obama Visits Nellis PV Plant )〕 There is no provision for operation during a power failure, when the base reverts to generator power. This would require limiting the output to less than or equal to what the generators can provide. Otherwise a cloud could pass over and cause the sudden drop in output to overload the generators, causing them to trip off. If a pumped-hydro facility was added in the nearby hills, that would allow the base to operate during power failures under solar power, although batteries would also be needed to allow time for the hydro-electric plant to adjust to the load requirements.〔(Clean energy doesn't always bring security for military )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nellis Solar Power Plant」の詳細全文を読む スポンサード リンク
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