IBM Cloud Authors: Pat Romanski, Yeshim Deniz, Elizabeth White, William Schmarzo, Karthick Viswanathan

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Machine Learning Helps IBM Boost Accuracy of U.S. Department of Energy Solar Forecasts by up to 30 Percent

Makes Solar Forecasts Available to States to Advance Integration of Solar Power into the Nation's Energy Pipeline

YORKTOWN HEIGHTS, N.Y., July 16, 2015 /PRNewswire/ -- IBM Research (NYSE: IBM) today revealed that solar and wind forecasts it is producing using machine learning and other cognitive computing technologies are proving to be as much as 30 percent more accurate than ones created using conventional approaches. Part of a research program funded the by the U.S. Department of Energy's SunShot Initiative, the breakthrough results suggest new ways to optimize solar resources as they are increasingly integrated into the nation's energy systems.  

IBM also announced that for a limited time it will provide foundational solar forecasts at five-kilometer spatial resolution to help government agencies and other organizations in the lower 48 states best evaluate their impact on supply and demand as well as operations.

Entering the third year, IBM researchers worked with academic, government and industry collaborators to develop a Self-learning weather Model and renewable forecasting Technology, known as SMT. The SMT system uses machine learning, Big Data and analytics to continuously analyze, learn from and improve solar forecasts derived from a large number of weather models. In contrast, most current forecasting techniques rely on individual weather models that offer a more narrow view of the variables that affect the availability of renewable energy.

IBM's approach provides a general platform for renewable energy forecasting, including wind and hydro. It advances the state-of-the-art by using deep machine learning techniques to blend domain data, information from sensor networks and local weather stations, cloud motion physics derived from sky cameras and satellite observations, and multiple weather prediction models. The SMT system represents the first time such a broad range of forecasting methods have been integrated onto a single, scalable platform.

"By continuously training itself using historical records from thousands of weather stations and real time measurements, IBM's system combines predictions from a number of weather models with geographic information and other data to produce the most accurate forecasts -- from minutes to weeks ahead," explained Dr. Siyuan Lu, Physical Analytics Researcher at IBM.

"By improving the accuracy of forecasting, utilities can operate more efficiently and profitably. That can increase the use of renewable energy sources as a more accepted energy generation option," said Dr. Bri-Mathias Hodge, who oversees the Transmission and Grid Integration Group at the National Renewable Energy Laboratory (NREL), a collaborator in the project.

In 2013, solar was the second-largest source of new electricity generating capacity in the U.S., exceeded only by natural gas1. A USA SunShot Vision Study suggests that solar power could provide as much as 14% of U.S. electricity demand by 2030 and 27% by 20502.

Currently, there are two main customers for renewable energy forecasting technologies: utility companies and independent system operators (ISOs). However, the inherent difficulty in producing accurate solar and wind forecasts has required electric utilities to hold higher amounts of energy reserves as compared to conventional energy sources. With solar power installations rapidly growing, future solar penetration levels will soon require increased attention to the value of more accurate solar forecasting.

"Solar photovoltaic resources have expanded dramatically in New England in the last five years, going from just 44 megawatts to 1,000 megawatts," said Jonathan Black, lead engineer on ISO New England's solar PV forecasting efforts and a collaborator in the project. "Currently, most of the solar installations in New England are 'behind the meter' on the distribution system, so their output isn't 'visible' in real time to the ISO's system operators, but it reduces the amount of electricity demand they observe. The growing aggregate output from all these resources across our region will increasingly change the daily demand curve, so the ISO will need accurate solar forecasts to help grid operators continue to balance power generation and consumer demand."

The U.S. Department of Energy SunShot Initiative is a collaborative national effort that aggressively drives innovation to make solar energy fully cost-competitive with traditional energy sources before the end of the decade. The team of scientists from IBM and NREL are presenting a paper on their preliminary findings this week at the European Control Conference (ECC 2015) in Linz, Austria.

About IBM Research
Now in its 70th year, IBM Research continues to define the future of information technology with more than 3,000 researchers in 12 labs located across six continents. Scientists from IBM Research have produced six Nobel Laureates, 10 U.S. National Medals of Technology, five U.S. National Medals of Science, six Turing Awards, 19 inductees in the National Academy of Sciences and 14 inductees into the U.S. National Inventors Hall of Fame – the most of any company.

Media Contact
Christine Vu
IBM Media Relations 

1 U.S. Energy Information Administration, Electric Power Monthly, December 2013 edition. 
2 R. Margolis, C. Coggeshall, and J. Zuboy, J., "SunShot vision study," U.S. Department of Energy, Washington, D.C., 2012.


IBM Research is producing solar and wind forecasts using machine learning, which are much as 30 percent more accurate than conventional approaches. Part of a research program funded the by the U.S. Department of Energy’s SunShot Initiative, IBM will also make solar forecasts available to help government agencies and other organizations in the lower 48 states advance integration of solar power into the nation's energy pipeline…


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