Eastern Interconnection

The CAPX2020 Model: Part II

One of the most ambitious transmission projects in America today is CAPX2020. In this second of two exclusive interviews, Fortnightly's Spark talks with Teresa Mogensen, Xcel Energy’s vice president of transmission, about how the investor-owned utility collaborated with public-power utilities to develop a complex set of lines and a solid investment for shareholders.

FORTNIGHTLY  What’s Xcel Energy’s role in the CAPX2020 project, and how does it fit into the company’s overall transmission plan and resource plan?

MOGENSEN CAPX2020 is very important for Xcel and the region.

Grid 2050

Shaping system transformation.

New technologies—and new expectations—require taking a fresh look at the institutions and practices that have provided reliable electricity for the past century. Collective action is needed to define the key attributes of a future grid and then to take the more difficult next step—adapting our processes and institutions to align with that future vision. A thoughtful approach will allow America to capture the potential value that’s offered by sweeping changes in technologies and policies.

The NOPR Was Late

But transmission planning, as we know it, may never be the same.

The recent landmark ruling on transmission planning cost allocation, known as “Order 1000,” and issued by the U.S. Federal Energy Regulatory Commission in late July 2011, could well produce an unintended side effect — the formation of regional compacts among states to identify needs and plan for development of new power plant projects.

Wind Integration and the Cost of Carbon

Renewables are greenest when displacing coal, not gas.

With the abandonment of a nationwide energy policy by the previous Congress, states continue leading carbon mitigation efforts. Indeed, existing state policies and renewable portfolio standards (RPS) are already having a significant impact on the U.S. generation portfolio. FERC now proposes to weigh state policy as a consideration in transmission filings. Should state policies guide federal action? Will they suffice to reduce carbon emissions?

Letters to the Editor

(October 2010) AWEA’s manager of transmission policy refutes author Robert Blohm’s assertion that renewable power exacerbates America’s growing problems with frequency response.

Vendor Neutral

Alstom introduces a new 3-MW wind turbine, one of the world’s most powerful for onshore installations; Solyndra reports its larges-ever rooftop installation of cylindrical photovoltaic (PV) systems — a 704-kW project in New Jersey; Plug Power reports that its GenDrive fuel cell units will power Walmart Canada’s fleet of electric lift trucks at a Alberta distribution center.

Green Blackouts?

Increasing renewable generation threatens reliability.

An increased reliance on renewable energy could threaten reliability of the nation’s electric transmission grids by reducing the rotational mass and rotational inertia of on-line turbine generators, thus, reducing the capability of generators to respond to drops in voltage frequency. In fact, data collected from 1994 to 2009 for the Eastern Interconnection already reveals a drop in the grid’s capability (as measured in megawatts) to stop a very rapid drop in frequency — such as a drop of a tenth of a cycle per second.

Tres Amigas Tie Up

Synchronizing networks to bring green power to market.

In order to fully integrate wind and other dispersed sources of energy into the system, America’s patchwork transmission networks need to be more closely interconnected and synchronized. An advocate for the Tres Amigas merchant transmission project explains how the proposed facility will integrate the grid.

Beyond Intermittency

Forecasting brings wind energy under control.

Advancements in forecasting have improved the reliability of day-ahead and hour-ahead estimates of wind generation. Wind never will behave like a base-load power plant. But as system operators integrate wind forecasts into their planning and market processes, they’re transforming intermittent wind energy into a variable but reliable resource.

Outsmarting the Grid

A trio of eager tech startups confronts an industry intent on preserving the status quo.

In light of all the excitement created by smart-grid regulatory initiatives and stimulus funding, three clever tech startups have come forward with proposals for novel grid projects. In California, Western Grid Development proposes to install energy storage devices ranging in size from 10 to 50 MW at various discrete and strategic locations in PG&E’s service territory where the California ISO has identified reliability problems. Second, a company called Primary Power proposes to deploy a total of four advanced, 500-MVAR static VAR compensators (SVC) at three separate locations within the PJM footprint. Third, in Clovis, N.M., Tres Amigas plans to allow power producers to move market-relevant quantities of electric power and energy between and among the nation’s three asynchronous transmission grids: ERCOT and the Eastern and Western Interconnections.