Entries in peak demand (11)

Friday
Jun092017

Significant price variation on May 18 highlights operational challenges of operating the grid during spring and fall

Real-time prices ranged from a high of $758.88 MWh in the northeastern Massachusetts and Boston pricing zone to a low of -$71.07 MWh price for power from New Brunswick

Thursday, May 18, 2017, was a hot one. If you have an interest in energy, you may have checked the New England locational marginal pricing (LMP) map that day, expecting to see prices rise across the region, responding to the hotter than normal weather. Instead, you saw an unusual, rainbow-like effect on the map, indicating a wide variation in real-time wholesale electricity prices. The real-time price spread was caused by challenging power grid circumstances that can occur mainly during spring and fall (but also any time of year, depending on resource availability): when unseasonable weather drives a spike in demand while major energy infrastructure is offline for maintenance.

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Wednesday
May032017

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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Wednesday
Apr262017

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.

Thursday
Dec152016

One factor rises above the rest when accurately predicting future energy use: the weather

How the ISO uses weather forecasts in formulating electric demand estimates

Earlier this summer, on July 7, 2016, a cold front moved into New England from the north, leading to unexpectedly cooler temperatures across the region. Boston hovered in the mid-60s for most of the day. An unanticipated thunderstorm in Hartford  caused a quick and dramatic drop in temperatures. The cool weather lasted through July 8.

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Monday
Dec052016

2016/2017 winter outlook: sufficient electricity supplies expected

Natural gas pipeline constraints remain a concern, Winter Reliability Program implemented

Electricity supplies should be sufficient to meet New England’s consumer demand for electricity this winter, but possible natural gas pipeline constraints could limit electricity production from natural gas power plants. A Winter Reliability Program has been implemented to incentivize gas and oil-fired power plants to procure sufficient fuel before winter begins. View the press release.

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Wednesday
Nov232016

As ovens heat up on Thanksgiving Day, so does electricity demand

For many around New England, the ritual is the same: Wake up early on Thanksgiving morning and start prepping dinner, firing up ovens for turkeys, stuffing and pies. The holiday brings a lot more activity than a typical fall Thursday morning and also changes the way ISO New England plans for the region’s energy use that day.

On most fall days, electric demand peaks in the early evening, as people around the region return home and begin household chores like laundry and cooking dinner. But on Thanksgiving, ISO New England’s system operators have seen consumer demand for electricity peak much earlier – often around noon – making it the only day of the year where electricity demand peaks this early.

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