Implementing a National Renewable Electricity Standard

Operations & Maintenance

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08.03.2009 | By Randy Rahm

The annual meeting of the Powder River Basin Coal Users’ Group was held in association with the ELECTRIC POWER conference in early May in Chicago. Get a taste of the festivities, technical meetings, and the announcement of the group’s 2009 Large and Small Plant of the Year winners in this conference report....

05.29.2009 | By K. Wendelberger, and B. Meerbeck, and B. Lamb

Recent improvements in the performance of steam power plants have been achieved with advanced computerized controls. These new control schemes not only reduce fuel consumption and make the plant much more responsive, but they also can significantly decrease start-up commissioning time and cost....

05.29.2009 | By Scott Rouse

Measuring combustion airflow in a coal-fired power plant can be problematic when using annubar instruments that feature small holes that can easily plug with coal dust. Sierra Instruments eliminates this big maintenance headache with its more-accurate, nonplugging thermal mass flow meter design....

03.31.2009 | By Frederick P. Haumesser, PE

Conventional wisdom tells us that the key to good boiler combustion requires carefully balancing the fuel-air ratios across all the coal pipes. Recent tests show that the uniformity of the burner-to-burner stoichiometries—not balanced pipe-to-pipe fuel flow distributions—dictates combustion uniformity....

03.31.2009 | By Jayant Khambekar, Roger Barnum, and Keith Geisel

Many coal-fired power stations built before 1980 were designed for handling relatively easy-handling lump coal. If your plant’s bins, bunkers, and silos aren’t up to dealing with today’s range of more variable coal properties, this case study shows one way to minimize coal flow problems....

11.07.2008 | M. Rech, J. Rupp, and K. Wendelberger

The more capable a power-generating unit is of reacting quickly to changes in load demand, the more profitably the unit can be operated. An improvement in load dynamics means that additional control response and capacity can be made available to the power grid. These characteristics are especially in demand in regions where a fast-responding unit can supply energy as ancillary services at a premium price....

09.30.2008 | By Gary J. Bases

The power industry’s operating and maintenance practices were held up to intense regulator and public scrutiny when on November 6, 2007, a Massachusetts power plant’s steam-generating boiler exploded and three men died....

09.30.2008 | By Keith Packard
By Keith Packard and Bruce Morrett

Chromium-molybdenum (chrome-moly) pipe has become a standard in the power generation industry, not only because of its corrosion resistance and high-temperature strength, but also for its cost-effectiveness. In many applications, it is a viable alternative to a more costly stainless steel pipe....

09.30.2008 | By Jeff Beattie

Spurred on by a recent audit showing widespread utility noncompliance with voluntary recommendations meant to protect the grid from cyber attacks, key lawmakers have unveiled plans to give the Federal Energy Regulatory Commission (FERC) broad powers to enact new mandatory measures to close vulnerabilities in the U.S. bulk power system to potentially devastating computer-launched assaults....

07.31.2008 | By Ravi Jethra

Measuring the level of flyash in your silos is not an easy task, in part because the flyash collected at one plant can be remarkably different from that collected at another plant, even if both fire the same coal. Such variability means that selecting the right instrument for your application is important....


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