Antiquated electricity grid won't be able to carry renewable energy to customers

(Photo of transmission lines from Flickr and photographers Vicki and Chuck Rogers)

Weekly Angst: A wind farm can be built in about a year. But it takes 5-10 years to construct the high-voltage power lines that will transmit the electricity to where it is needed.

And the lack of current capacity (excuse the pun) in transmission lines is blocking growth of renewable energy here, especially wind.

Many renewable projects simply won’t happen if policymakers don’t expand the power grid to accommodate them, alternative energy executives warned last week at the Renewable Energy Finance Forum in New York.

What happens with transmission “will define whether 2% or 20% of U.S. electricity is renewable,” said Dan Reicher, the executive in charge of Google’s green push.

Transmission lines aren’t a sexy subject, but I’m sure you’ll agree there’s not much point in building a wind farm or solar plant if it can’t get connected to a grid. And that is the risk here. Substantially more construction of towers and power lines is needed to for the U.S, to reach a goal of 15% renewable energy, a target passed by the House but not the Senate.

In Minnesota, for example, if just one-third of the applications for wind farms are granted, the 7,500 megawatts of power they would create for the Twin Cities would exceed the 2,000MW capacity of the grid.

Why it takes so long
One problem is that the ideal places for large wind farms (Midwest plains) and solar installations (Mojave Desert) are far from the cities where the electricity is needed.

And it costs $1.5 million per mile to put up high-voltage transmission lines. While that expense ultimately is passed on to the consumer, utilities are reluctant to build the lines before a wind farm or solar plant is built – and vice versa. So a chicken-and-egg struggle is going on here.

Also the permitting process can take forever. One issue is where to put the lines. Nobody wants them.

In California, there’s a battle over San Diego Gas & Electric’s plan to build a 150-mile transmission line from a desert solar plant to San Diego through a state park. Environmentalists argue it would ruin the park, while the utility says it can’t meet California’s renewable requirement without it.

A lag in investment
Investment in the electricity grid was neglected from 1975-2000, as funding dropped from $5 billion a year to just $2 billion by the turn of the century. Since then increased demand has sparked investment of about $60 billion, but the system is antiquated, causing such problems as the 2003 blackout in the Northeast and rolling brownouts in California. Lack of capacity remains a serious drawback that may well prevent states with mandated renewable electricity standards (RES)from reaching their goals.

Some in Congress are calling for “national renewable energy zones” to reduce bottlenecks in delivering power. Bills offered by Rep. Jay Inslee (D-Wash.) and Sen. Majority Leader Harry Reid (D-Nev.) would have the government identify zones with the capability to produce significant amounts of renewable energy but insufficient transmission capacity. Inslee’s bill would spread the cost of construction and requires the president to identify specific high-voltage lines for renewal within a year of establishing a national zone.

The 2005 Energy Policy Act allows the federal government to designate “national interest electric transmission corridors” where it could extend needed lines despite state and local objections. But there is resistance from states and environmentalists.

Some states and regions are searching for their own solutions. Texas, the state with the most wind power, has such zones, originally through the Western Governors Association, now in a project with the Department of Energy, which will help it bring wind to Dallas, Houston and San Antonio. Colorado, Minnesota and New Mexico are taking similar steps.

Grid should be high priority
NASA climate scientist James Hansen said last week that the next president needs to make it a priority to create a nationwide low-loss electrical grid so the country can replace fossil fuels with renewable energy. The technology exists to bury direct-current high-voltage lines, he said.

Environmentalist Robert F. Kennedy Jr. says it’s important for the next president to work with governors to get rid of arcane and conflicting state rules and open up the grid so clean energy can compete fairly with fossil fuels.

The energy sector “needs an initiative like the 1996 Telecommunications Act,” which required open access to phone lines, Kennedy said. As with telephones, he said, eliminating constraints will encourage investment, and utilities and entrepreneurs will revitalize the grid. Like Hansen, he argues for direct current, saying too much energy is lost in alternating current.

The transmission grid also needs to use “smart” technology to send electricity where and when it is needed, experts say.

Demand for electricity is expected to grow 40% by 2030, according to North American Electric Reliability Council. To meet that demand with renewable sources we must take action immediately to provide an adequate grid.

(Sources: PlanetArk, Greenwire, ClimateWire, E&E Daily, USA Today, The Guardian, Vanity Fair)