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.
Transmission cost allocation, the worth of the grid, and the limits of ratemaking.
A look at the issues that the Federal Energy Regulatory Commission must address concerning allocation of costs for certain high-voltage transmission lines 500kV or greater, planned for the PJM region, in the “paper hearing” on remand from the 7th Circuit federal court decision that rejected a socialized, region-wide sharing of costs among all utilities and customers across the RTO footprint.
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.
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.
Constitutional questions about state-mandated renewable tariffs.
Despite state efforts to follow the European model of state-mandated feed-in tariffs to promote renewable power, these actions won’t pass Constitutional muster. The Supremacy Clause makes a formidable legal barrier.
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.
Wind faces a nano-scale threat.
For decades now, wind turbines have been generating electricity more cheaply than most other (non-hydro) renewable energy technologies. In particular, wind has maintained a comfortable lead over solar energy in the price-per-kWh race. That’s destined to change.
T&D and Smart Grid
The ZigBee Alliance and the Wi-Fi Alliance entered an agreement to collaborate on wireless home area networks (HAN) for smart-grid applications. The initial focus of the collaboration will be ZigBeeSmart Energy Profile 2.0, which is the next-generation energy management protocol for smart grid-enabled homes based on today’s successful ZigBeeSmart Energy Profile. The ZigBeeSmart Energy Profile 2.0 is expected to be extended to operate over Wi-Fi technology as a result of the collaboration.
Quantifying the economic benefits of generation alternatives.
Are renewables truly marking the start of a new economy, creating both economic growth and reliable jobs? Answering that question takes a complex analysis, but the numbers suggest green benefits might be smaller than expected.