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Maguire: ROI-America’s power grid chokes on expensive congestion

The congestion on the U.S. electric grid is becoming a costly bottleneck. It drives up power prices, delays new generation projects, and undermines reliability.

But the attention of the electricity industry is still largely focused on generation. Politicians debate?solar panel, natural gas turbines, and nuclear reactors, while utilities boast of billions of dollars in planned investments.

PJM Interconnection is the largest U.S. electricity market, spanning 13 states. It provides a stark example. According to Gridraven, transmission congestion cost market players $777.8 in June.

This was a drop from the?record-breaking $1 billion congestion bill during a heatwave in May, but it remains high.

In just two months, the combined congestion charges amounted to $1.8 billion.

GROWTH TREND

It is the direction of travel, not the headline figure. The direction in which things are going is what's most worrying.

In the coming years, congestion costs will likely become a greater burden for electricity producers and consumers if current trends continue.

This is important because congestion acts as a tax against economic growth.

Grid operators can't just dispatch the cheapest electricity available when transmission lines are overloaded.

They are forced to use generators that are more expensive and located nearer to the demand centers. These costs are eventually passed on to customers through wholesale markets.

Customers rarely see "congestion surcharges" on their electric bills. But they still pay.

The problem becomes more acute as the demand increases at exactly the wrong time.

Years ago, the U.S. demand for electricity was virtually flat. This allowed policymakers and utilities alike to put off difficult transmission decisions. This era is over.

Construction of data centers is on the rise. The number of manufacturers expanding their domestic production is on the rise. State and utility companies continue to promote electrification in transport and heating.

All of these trends are increasing demand for electricity and, more importantly, for the movement of it throughout the country.

MISMATCH IN SUPPLY AND DEMAND

Even more difficult is the geography of today's electricity system.

The cheapest new generation is often located away from the major population centers. In rural areas, wind resources are most abundant. Solar power is often more efficient in areas where there is plenty of land than in places where electricity is consumed.

The U.S. needs transmission infrastructure as much as they need generation infrastructure.

Transmission development is notoriously slow. Permitting and building new high-voltage lines can take up to a decade. Projects are often delayed by local opposition, disputes over permits and battles about cost allocation.

The demand for goods and services is growing, but it does not wait.

PJM PAINPOINTS

PJM is already experiencing the?consequences.

Congestion in June was concentrated primarily in Pennsylvania, Maryland and Northern Virginia. These regions are at the intersection between rising electricity demand and transmission bottlenecks.

Northern Virginia has been a major hub for the U.S. Data-center boom.

It is clear that the billion-dollar event in May was not an anomaly. It may instead offer a glimpse at what the future of electricity markets will look like.

This presents challenges to consumers and power producers alike.

Even when the electricity demand is high, generators behind transmission restrictions may not be able to access all lucrative markets.

Congestion can reduce revenues, distort signals of investment and reduce the value new generation projects.

Many renewable developers are vulnerable, as they are far away from urban demand centers and rely heavily on transmission.

DYNAMIC PROSPECTS FOR GROWTH

Ironically, America is investing heavily in power generation but failing to make the most of it due to grid bottlenecks.

This explains the interest in technologies which can extract more capacity from existing transmission infrastructure.

Gridraven estimates Dynamic Line Rate technology could have?increased the available transmission capacity in PJM on average by 13% in June, resulting in savings of approximately $88.3 millions in congestion.

The company, which models future transmission capacity using weather forecasts and AI, suggests that the most costly constraint in June was the?Graceton Manor 230-kilovolt Corridor, could have seen costs for congestion reduced by almost $36 million.

It is not as important whether these estimates are accurate or not, but rather the message. Because it is so difficult to build new infrastructure, the industry is looking for ways to maximize existing grid capacity.

Other firms have also developed hardware to increase capacity on existing transmission lines. These include Linevision which models transmission capacity using sensors and digital twins.

These technologies could be helpful. They are unlikely to eliminate the problem completely.

It's a sad fact that America's electric ambitions are growing faster then its transmission network.

The country is aiming for AI leadership, increased domestic manufacturing, cleaner energie, a wider electrification, and stronger economic growth. Each of these goals will require more electricity to be flowing through the grid.

Congestion costs will continue to rise until transmission expansion catches up. If PJM is any guide, then electricity consumers will soon find out that the most costly part of energy transition isn't producing power.

It's moving.

These are the opinions of the columnist, who is also an author. This column is great! Open Interest (ROI) is your new essential source of global financial commentary. Follow ROI on LinkedIn, X and X. Listen to the Morning Bid podcast daily on Apple, Spotify or the app. Subscribe to the Morning Bid podcast and hear journalists discussing the latest news in finance and markets 7 days a weeks.

(source: Reuters)