Making room on the local grid for small-scale PV.
For the first time, perhaps, the electric utility industry may need to keep track not only of peak load, but also of minimum load, as the Federal Energy Regulatory Commission reviews a proposal by the Solar Energy Industries Association to employ a new definition of minimum load under a new, relaxed threshold test that would govern eligibility for fast-tracking of applications by generation developers to interconnect new, small-scale solar energy projects to the local utility distribution grid.
A strategic approach to mitigating rate increases and greenhouse gas price risk.
Experience in the Duke Energy Carolinas service territory shows that high penetration rates for electric vehicles, combined with increased natural gas-fired power generation, can result in lower costs to customers and lower risks for utility shareholders—while also reducing total emissions of greenhouse gases. However, these outcomes depend on policy changes that facilitate smart, off-peak vehicle charging, and that allow utilities to capture the benefits of a more environmentally friendly power system.
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.
Preparing the grid for large-scale renewables.
With large solar arrays and wind farms being proposed to connect to transmission and sub-transmission systems, are utility companies sufficiently prepared to handle the challenge of integrating these large intermittent resources? The industry now must decide whether transmission reliability factors — most notably dynamic voltage support and system frequency management — need to be resolved by renewable generators, or whether they should become a cost of doing business for transmission providers and reliability coordinators.
(May 2011) Florida Power & Light unveils hybrid solar power plant; SECO selects Sensus for smart grid technology; Lockheed to implement Con Edison energy efficiency programs; Elster partners with SAIC to deliver comprehensive smart grid solutions; Columbia Power Technologies deploys wavepower prototype system; plus contracts and announcements from GE, Siemens, Verizon Wireless, DT, Xcel, Tenaska Solar and others.
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?
Green energy mandates might overburden gas pipelines.
By Diane A. Rigos, Boris L. Shapiro and Richard L. Levitan
Market rules could evolve to compensate gas suppliers for pressurizing pipelines when needed on short notice. Enhanced ancillary services will require innovative strategies using line pack in interstate pipelines and stepped up communication among gas and electric market participants to preserve reliability objectives in gas and electric markets.
A new future for small coal-fired plants.
Adam Borison, Gregory Hamm and Philip Narodick
Small coal-fired plants are particularly vulnerable to economic and environmental pressures, putting some plant owners in what seems like a no-win position. But an emerging option—biocoal from crop wastes—might give small coal units a new lease on life.
California defends its cogen feed-in tariff—complete with its own virtual carbon tax.
California’s new feed-in tariff (FIT) is creating a burgeoning market for green energy investments, but the policy has sparked a fierce battle over state authority to dictate wholesale power transactions. A federal case will determine whether the 1978 Public Utility Regulatory Policies Act pre-empts states from requiring purchases that exceed utilities’ avoided cost.
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.
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