Entries in summer (7)


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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Summer 2016 markets report reviews wholesale market outcomes during June, July, and August 2016 

The Summer 2016 Quarterly Markets Report prepared by the Internal Market Monitor (IMM) of ISO New England reviews wholesale energy market outcomes for June, July, and August of 2016.The report notes that the total wholesale cost of electricity (including energy, capacity, and ancillary services) during the three-month period was $1.56 billion, up 13% compared to the market value of $1.38 billion during the summer of 2015. The average real-time wholesale energy price was $30.35 per megawatt-hour, a rise of 13% compared to the summer of 2015. The year-over-year increase was driven by 2% higher average demand due to hotter weather, particularly in August, and natural gas prices that averaged $2.68 per million British thermal units, 31% higher than the average price during the summer of 2015.

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Summer 2016 recap: Uneventful, until August

Summer 2016 was fairly uneventful until August arrived with its long stretches of hot, humid weather that pushed up demand for air conditioning and the electricity that powers it. Despite a high number of unexpected resource outages on one August day, ISO New England’s control room operators were able to operate the power system reliably that day and throughout the summer.

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Beating the heat: How ISO-NE prepares for summer peak demand

As the region gears up for a season of fun in the sun, ISO New England prepares for conditions unique to the hot, humid summer months. Peak demand brought on by warmer weather and an increased reliance on energy-intensive technologies, such as air conditioning, can create complex challenges for the grid operator.

To maintain a reliable supply of electricity to New England’s residents and businesses, the ISO’s System Operations team must rely on carefully planned procedures to increase power generation and curb consumption during periods when demand for electricity threatens to exceed available capacity and reserves. High consumer demand or unplanned resource outages—when a transmission line or generator suddenly goes offline—are typically the reasons for these procedures to be enacted.

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2016 summer outlook: sufficient electricity supplies expected

Some natural gas generators may need to get their fuel from other sources during pipeline construction

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 26,704 MW megawatts (MW). Extreme weather of 94°F could push up electricity demand to 29,042 MW. Construction work on the region’s natural gas pipeline infrastructure will require some power plants to obtain fuel from different sources. View the press release.

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Eastern Interconnection planning authorities analyzed interregional impacts and transfer capabilities for 2025 summer and winter peak hours

ISO New England and other electric power system planning authorities are members of a collaborative that plans and conducts studies for the entire Eastern Interconnection. The Eastern Interconnection Planning Collaborative (EIPC) studies are used to support state, provincial, regional, and federal policy decision making. EIPC has recently published its latest analysis, the Report for 2025 Summer and Winter Roll-Up Integration Cases

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