Entries in system operations (45)


ISO-NE employees recognized with INFORMS award

Several ISO New England employees have been recognized by INFORMS, a leading international association for operations research and analytics professionals, for their paper addressing the challenges associated with operating large-scale electric power systems in light of the increasing penetration of wind and solar power generation.

A collaboration between ISO New England and the Georgia Institute of Technology, the paper, “Multistage Adaptive Robust Optimization for the Unit Commitment Problem,” was recently named the INFORMS ENRE Best Publication Award in Energy, an annual award given to the best refereed journal article in the areas of energy, natural resources, and the environment.

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New England power grid operations during August 21 partial eclipse 

Three factors tempered the effect of the eclipse on electricity demand and PV output

New England was partially under the shadow of the moon on August 21 between about 1:20 p.m. and 4:00 p.m. The region reached peak obscuration at 2:44 p.m., when about 65% of the sun was blocked. The ISO was prepared for a drop in output from the region’s 2,000 megawatts (MW) of solar photovoltaic (PV) systems and subsequent rise in electricity demand on the grid. The vast majority of New England’s solar power comes from small-scale, distributed systems connected directly to homes and businesses or to local utilities—and not to the regional power system. These systems reduce the amount of electricity demand system operators see on the grid when the sun is up

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ISO-NE marks 20th anniversary

This year marks the 20th anniversary of ISO New England, commemorating two decades of reliable grid operation, the development and administration of new competitive wholesale electricity markets, and planning for the long-term reliability of the system.

Since its creation on July 1, 1997, ISO New England has been a stable presence in an ever-changing energy industry landscape. Learn more about New England's industry progress over the past 20 years and read the press release.


ISO-NE prepared to operate grid through partial solar eclipse in August

Effects on solar-powered resources will be lesser than if total eclipse or if eclipse took place earlier in summer

New England will be under the shadow of the moon for much of the afternoon on August 21 during a partial solar eclipse. According to NASA, the eclipse will occur between approximately 1:20 p.m. and 4:00 p.m., with the peak expected at around 2:45 p.m., when about 65% of the sun will be blocked (called obscuration). If it is a sunny day, the ISO expects that output from the region’s 2,000 megawatts (MW) of solar photovoltaic (PV) systems will drop during these 2 hours and 40 minutes, but anticipates having sufficient resources available to meet the resulting rise in electricity demand.

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Winter 2016/2017 recap: Power system performs well during generally mild weather

New England’s power system performed well during winter 2016/2017, though colder temperatures in December led to higher natural gas and wholesale electric prices compared to the prices seen during the record-setting warm weather of winter 2015/2016.

While January and February were milder than normal, temperatures in December 2016 averaged 32.4°F, more than 10°F colder than the previous December. Over the course of the winter New Englanders used 30,933 gigawatt hours (GWh) of electricity, slightly less than the 31,328 GWh used during the previous winter (which, as a leap year, included one extra day in February), but significantly less than the 33,709 GWh used during the much colder 2014/2015 winter, according to ISO New England data.

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Summer 2017 outlook: sufficient electricity supplies expected

New England is expected to have the resources needed to meet consumer demand for electricity this summer, though tight supply margins could develop if forecasted peak system conditions occur. If this happens, ISO New England will take steps to manage New England’s electricity supply and demand in real time and maintain power system reliability. Under normal weather conditions of 90 degrees Fahrenheit (F), electricity resources should be sufficient to meet consumer demand this summer, with a forecasted peak of 26,482 MW megawatts (MW). Extreme weather of 94°F could push up electricity demand to 28,865 MW. View the press release.