een wereldwijd elektriciteitsnet een oplossing voor veel problemen  GENI es una institución de investigación y educación-enfocada en la interconexión de rejillas de electricidad entre naciones.  ??????. ????????????????????????????????????  nous proposons la construction d’un réseau électrique reliant pays et continents basé sur les ressources renouvelables  Unser Planet ist mit einem enormen Potential an erneuerbaren Energiequellen - Da es heutzutage m` glich ist, Strom wirtschaftlich , können diese regenerativen Energiequellen einige der konventionellen betriebenen Kraftwerke ersetzen.  한국어/Korean  utilizando transmissores de alta potência em áreas remotas, e mudar a força via linha de transmissões de alta-voltagem, podemos alcançar 7000 quilómetros, conectando nações e continentes    
What's Geni? Endorsements Global Issues Library Policy Projects Support GENI
 
Add news to your site >>






NREL Helping Virgin Islands Cut Fuel Use - Jan 11, 2012 - nrel.gov - Generation - Technical Articles - Index - Library - GENI - Global Energy Network 
Institute

 

 

NREL Quantifies Significant Value in Concentrating Solar Power

 

Apr 24, 2013 - nrel.gov

CSP with thermal energy storage boosts California electric grid

Researchers from the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) have calibrated the significant value that concentrating solar power (CSP) plants can add to an electric grid.

The NREL researchers evaluated the operational impacts of CSP systems with thermal energy storage within the California electric grid managed by the California Independent System Operator (CAISO). NREL used a commercial production cost model called PLEXOS to help plan system expansion, to evaluate aspects of system reliability, and to estimate fuel cost, emissions, and other operational factors within the CAISO system. The analysis is detailed in a recent publication, Analysis of Concentrating Solar Power with Thermal Energy Storage in a California 33% Renewable Scenario, by Paul Denholm, Yih-Huei Wan, Marissa Hummon, and Mark Mehos.

NREL's analysis was considered within the context of California's renewable portfolio standard (RPS), which requires 33% of power be supplied by renewables by 2020. The specific focus was on the "Environmentally Constrained" 33% RPS scenario, which includes a high contribution of generation from photovoltaic solar energy systems. By also considering how the state could take advantage of CSP with thermal storage, NREL used the PLEXOS model to quantify the value of CSP in reducing the need for conventional power generation from fossil fuels, and compared this value to other sources of generation, including photovoltaics, which supply variable energy depending on the amount of sunlight available.

To perform this analysis, NREL Senior Analyst Paul Denholm explains, "We created a baseline scenario, then added four types of generators--a baseload generator with constant output, a photovoltaic system, a CSP plant providing dispatchable energy – or power that can be turned on or off on demand -- and another CSP plant providing both energy and operating reserves."

The analysis demonstrated several valuable properties of dispatchable CSP, such as its ability to generate power during high-value periods when electricity demand is high, and its capability to be turned off during lower-value periods. Of key interest, NREL found that significant operational value is derived when CSP is allowed to provide reserve power, including frequently operating at less than full load, which would be a substantial change in operational practice.

Mark Mehos, manager of NREL's CSP Program, emphasizes a couple other conclusions from their analysis: "CSP plants switched on during periods of highest consumer demand for electricity resulted in very high capacity value. And the difference in value in CSP plants with and without thermal energy storage depends greatly on the amount of other variable-generation renewable energy sources on the grid, such as wind and photovoltaics."

NREL's study has helped to develop approaches that can be used by utilities and system planners to incorporate CSP in standard planning tools. It has also quantified the value of adding thermal storage to CSP in a scenario of high levels of renewable energy in California.

NREL is the U.S. Department of Energy's primary national laboratory for renewable energy and energy efficiency research and development. NREL is operated for DOE by the Alliance for Sustainable Energy, LLC.

 

OVER VIEW



Updated: 2016/06/30

If you speak another language fluently and you liked this page, make a contribution by translating it! For additional translations check out FreeTranslation.com (Voor vertaling van Engels tot Nederlands) (For oversettelse fra Engelsk til Norsk)
(Для дополнительных переводов проверяют FreeTranslation.com )