grid

Grid operators warn the US heatwave could send electricity demand near record levels before the Fourth of July holiday.

Power grid operators in the United States are warning that a dangerous heatwave could put more strain on an electric grid already under pressure from surging energy consumption.

A stretch of extreme heat is expected to intensify across much of the central and eastern parts of the country this week, peaking from Tuesday through Thursday.

That heatwave is likely to continue through one of the busiest travel weekends of the year, as millions of Americans prepare for Fourth of July celebrations on Saturday.

Temperatures this week are forecasted to climb above 38 degrees Celsius (100 degrees Fahrenheit) from Boston to Washington, DC, pushing up demand for air conditioning.

The heatwave coincides with two major events on the US calendar. Saturday’s holiday marks the 250th anniversary of the US’s independence, and millions are expected to gather for barbecues, parades and fireworks.

The extreme temperatures also come as the FIFA World Cup has reached the knockout stage, with many host cities, including New York, Boston, Philadelphia and Washington, expected to feel the heat.

Humidity could push the heat index as high as 46 degrees Celsius (114 Fahrenheit) in some places, while overnight temperatures will offer little respite.

The US’s largest regional grid operator, PMJ Interconnection, is forecasting record summer electrical demand of 166.3 gigawatts for Thursday evening, surpassing the previous summer peak set two decades ago, in 2006.

The New York Independent System Operator (NYISO), the state’s grid operator, is also expecting electricity demand to approach record highs, while the Midcontinent Independent System Operator (MISO), which covers 15 states in the Midwest and South, could also see its peak demand record challenged.

Authorities at MISO say they will rely on PMJ for support in covering consumer needs.

In a May report, PMJ’s executives warned of a “fundamental mismatch between how fast demand is growing and how quickly new supply can be built and connected to the grid”.

New power plants, they said, now take twice as long to build and cost twice as much as they did a decade ago.

Meanwhile, there has been increasing pressure on electrical grids from new technology like data centres and electric vehicles.

In May, PMJ said hyperscale data centres were “adding load at an unprecedented pace”.

Experts say the artificial intelligence (AI) boom is colliding with climate change, with tools like ChatGPT, Gemini and Claude being processed in vast, energy-hungry data centres.

The most energy-intensive are the hyperscale facilities that require between 100 and 300 megawatts of electricity, enough to power hundreds of thousands of homes.

Many of those are concentrated in northern Virginia, which sits within PJM’s service territory and is widely described as the world’s largest data centre hub.

Researchers have also identified what they call a “data heat island effect”, finding that land surface temperatures around AI data centres rise by an average of 2 degrees Celsius (3.6 degrees Fahrenheit), with some locations seeing increases of up to 9 degrees Celsius (16.2 degrees Fahrenheit).

The National Weather Service in the US warns that long periods of extreme heat create significant stress on the body.

It has urged people to limit outdoor activity, stay hydrated and keep close to air conditioning or cooling centres.

A 2024 report from the Journal of the American Medical Association (JAMA) found that 21,518 deaths in the United States from 1999 to 2023 were heat-related.

The highest number came in the final year of the report’s analysis, 2023. That year, 2,325 people died from causes attributed to high temperatures.

June 19 (Asia Today) — South Korean researchers have developed an open simulation model that digitally reproduces the structure of the country’s power grid, allowing researchers to study the domestic electricity system without using classified infrastructure data.

The Gwangju Institute of Science and Technology said Friday that its Power Grid Research Center developed the GIST 2217-Bus Test System using only publicly available maps and electricity statistics.

A bus is a connection point within a power system where electricity is generated, transmitted or distributed.

The institute said the model could improve South Korea’s power grid research environment, which has largely depended on foreign test systems developed around electricity networks with different geographical and operational characteristics.

The project is part of an effort by the research center, which opened in September, to establish the foundation for a next-generation South Korean power grid research platform.

Computer simulations are needed to analyze how electricity moves through transmission networks and to ensure that power generated at plants can be delivered reliably to homes and industrial facilities.

Detailed information about South Korea’s actual power grid is not publicly available because it is considered sensitive national infrastructure data. Domestic researchers have therefore relied on foreign test systems, including models provided by the Institute of Electrical and Electronics Engineers.

Researchers said those models have limitations when applied to South Korea.

Many of the country’s power plants are concentrated along coastal areas, while a large share of electricity demand is centered in the Seoul metropolitan area. That structure differs significantly from the foreign grids represented in existing research models.

The GIST team constructed its model without using confidential grid data. Researchers instead combined publicly available geographical information with national electricity statistics.

The completed system contains 2,217 buses and about 3,700 transmission circuits. It represents connections among major power plants and substations across South Korea, including links between the mainland and Jeju Island.

GIST said the model produced stable calculations under conditions simulating peak electricity demand during the summer, demonstrating sufficient reliability for power system research.

The institute released the grid dataset, map and construction and analysis tools for public use. Researchers and companies can download and use the materials without obtaining separate permission.

The model could be used to study how much additional solar and wind power can be connected to the grid, responses to blackouts, grid operations during the transition to carbon neutrality and artificial intelligence-based electricity management systems.

Kim Yoon-soo, director of the Power Grid Research Center, said he hopes the model will serve as both a starting point and a shared platform for research on South Korea’s electricity system.

“We will continue updating the model as the power grid changes and incorporate the actual operating characteristics of generators and renewable energy facilities,” Kim said.

He said the center intends to develop it into a South Korean power grid platform that can be used jointly by domestic researchers and companies.

— Reported by Asia Today; translated by UPI

© Asia Today. Unauthorized reproduction or redistribution prohibited.

Original Korean report: https://www.asiatoday.co.kr/kn/view.php?key=20260619010006836

June 16 (UPI) — Venezuela’s government signed a memorandum of understanding with U.S.-based GE Vernova, General Electric’s energy division, and state-owned utility Corpoelec to repair, modernize and stabilize the country’s struggling national power grid.

The plan aims to restore 1,000 megawatts of generating capacity over the next 24 months and more than 5,000 MW within four to five years.

The agreement, signed Monday by Venezuela’s interim President Delcy Rodriguez, comes shortly after the National Assembly approved reforms to the country’s electricity law. The changes create a new framework that allows foreign investment in the sector after 15 years of an exclusive state monopoly.

During the signing ceremony, attended by Venezuelan government officials, company representatives and U.S. Charge d’Affaires in Caracas John Barrett, Rodriguez said the project will address both hydroelectric and thermoelectric infrastructure.

“We want to move forward steadily in the recovery of the national electricity system, for the benefit of the entire country but also to facilitate conditions for all the international investments arriving in the country,” Rodriguez said during the ceremony, which was broadcast on state television.

GE Vernova technical teams spent six weeks conducting an audit of Venezuela’s electrical system. The assessment confirmed the deteriorated condition of Corpoelec’s facilities, which have contributed to electricity rationing and widespread blackouts, particularly in western states such as Zulia, the center of Venezuela’s oil industry and a major agricultural region.

“We want to move quickly so the system works as well as possible within a few months, and I believe we can do that together,” GE Vernova Chief Sustainability Officer Roger Martella said. “We already have an agreement on the technical aspects and how we can move forward rapidly. Over the next 12 months and beyond, we will strengthen the national electric system.”

According to local media reports, the Guri Hydroelectric Plant, which supplies about 70% of the country’s electricity, has suffered significant wear because of a lack of original replacement parts. New equipment will be used to stabilize and rehabilitate generating facilities at hydroelectric dams in southern Venezuela.

GE Vernova’s equipment also is expected to help restore local thermoelectric generation capacity, reducing pressure on the Guri complex and improving energy independence for central and western regions.

Transmission lines that cross the country face constant overloads and aging substations. The plan includes energy management software and upgrades to substations to improve reliability and reduce recurring power fluctuations.

The legal reforms approved this month allow concessions of up to 25 years in power generation, transmission and distribution, providing legal certainty for companies such as GE Vernova to deploy technology and services in the sector.

The legislation also establishes stricter accountability requirements for operators and creates a formal framework for renewable energy development.

In addition to increasing generating capacity and modernizing grid operations, the agreement includes a specialized training program for Venezuela’s technical workforce.