Renewables Provided 17.6% of Electricity Generation in the U.S. in 2018

by ronfluegge 28. March 2019 12:47

Overall, renewable generation in the U.S. provided a new record of 742 million MWh of electricity in 2018, nearly double the 382 million MWh produced in 2008. This is according to data recently released by the U.S. Energy Information Administration. In fact, renewables provided 17.6% of electricity generation in the U.S. in 2018.

However, conventional hydroelectric capacity has remained relatively unchanged, increasing by only 2% since 2008. Changes in hydroelectric generation year-over-year typically reflect changes in precipitation and drought conditions. Between 2008 and 2018, annual U.S. hydroelectric generation was as low as 249 million MWh and as high as 319 million MWh, with hydroelectric generation in 2018 totaling 292 million MWh.

Nearly 90% of the increase in U.S. renewable electricity between 2008 and 2018 came from wind and solar generation. Wind generation rose from 55 million MWh in 2008 to 275 million MWh in 2018 (6.5% of total electricity generation), exceeded only by conventional hydroelectric at 292 million MWh (6.9% of total generation).

U.S. solar generation has increased from 2 million MWh in 2008 to 96 million MWh in 2018. Solar generation accounted for 2.3% of electricity generation in 2018. In 2018, 69% of solar generation, or 67 million MWh, was utility-scale solar.

Increases in U.S. wind and solar generation are driven largely by capacity additions. In 2008, the U.S. had 25 GW of wind generating capacity. By the end of 2018, 94 GW of wind generating capacity was operating on the electric grid. Almost all of this capacity is onshore; one offshore wind plant, located on Block Island, off the coast of Rhode Island, has a capacity of 30 MW. Similarly, installed solar capacity grew from an estimated less than 1 GW in 2008 to 51 GW in 2018. In 2018, 1.8 GW of this solar capacity was solar thermal, 30 GW was utility-scale solar photovoltaics (PV), and the remaining 20 GW was small-scale solar PV.

Natural gas fuel starvation at large power plants in the U.S. and the effect of gas delivery arrangements on reliability

by ronfluegge 25. September 2018 20:53

Natural gas fuel starvation at large power plants in the U.S. and the effect of gas delivery arrangements on reliability

Gerad Freeman, Jay Apt & John Moura

36th USAEE/IAEE North America Conference

Washington, D.C.

September 25, 2018


Power plant failures are correlated with each other

Planners use historical data to anticipate the amount of power plant capacity needed.

• They previously assumed that power plants fail independently.

• In 2018, Murphy et al. showed that this assumption was violated in most regions

• This could lead to increased risks of blackouts.

• They did not identify why there were correlated power plant failures.

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NERC Training Announcement - GADS Conventional and Wind Training

by ronfluegge 4. August 2018 13:41

The NERC Generating Availability Data System Working Group (GADSWG) implements a uniform approach to reporting and measuring North American generating plant availability, performance and other related reliability data.

Conventional GADS training will include items such as how GADS data is used, events and performance, combined cycle component versus block reporting, the case for event reviews, review of cause codes, examples of poorly reported events to NERC, understanding Data Reporting Instructions (DRI) Appendix F: Equations and the data submittal process at Open Access Technology International (OATI).

Wind GADS training will include the reporting implementation timeline, entity registration, processes and reports. Additionally, the data submittal process through the NERC GADS Wind reporting application will be covered.

The GADSWG will offer training at the following location:

Week of October 15th at SERC Reliability Corporation, Charlotte, NC
Click here for Training at SERC in Charlotte, NC

Training classes conducted are:
•    An introductory session for new conventional GADS reporters on Monday
•    Conventional GADS material will be covered on Tuesday
•    Appendix F  and analytics in conventional GADS will be covered on Wednesday
•    GADS Wind material will be covered on Thursday and Friday

Training Schedule:
•    Monday | Noon – 1:00 p.m. Registration | 1:00 p.m. – 4:00. p.m. Introductory Session
•    Tuesday | 9:00 a.m. – 4:00 p.m. | Conventional GADS
•    Wednesday | 9:00 a.m. – Noon | Conventional GADS Appendix F Equations and Analytics
•    Thursday | 9:00 a.m. – 4:00 p.m. | Wind GADS
•    Friday | 9:00 a.m. – Noon | Wind GADS

Although registration is required, there is no fee for this training.  Continental breakfast and lunch will be included.

For more information or assistance, please contact NERC via email: for conventional units or for wind plants.

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