Team-CCJ

Starting reliability improvement: Rock Springs lauds start system retrofit

The turnkey digital front end (DFE) solution for aging, unreliable, or obsolete gas turbine load-commutated inverter (LCI) starting systems, described last year in CCJ ONsite, now has a user testimonial and operating experience supporting it. John Chaya, operations manager at Cogentrix’ Rock Springs (Maryland), reports that the installation by Turbine Controls & Excitation Group Inc […]

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Macroetching aids in removing heat-affected zones of rubs

With a little luck, you’ll never experience significant rub damage to your rotors. By design, OEMs usually provide generous clearance between the rotor and non-rotating parts except where it’s unavoidable: bearings and seals. OEMs mitigate the rubbing risks associated for those close clearance components with smart material selection—such as Babbitt, brass, and nylon. Those features

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Latest grid-scale battery tackles T-line stability

Large-scale battery energy storage systems (BESS) continue to demonstrate their ability to meet specific functional requirements of grid operations and management under a variety of business models and ambient conditions. Los Angeles Department of Water and Power (Ladwp) is the latest to add a BESS, primarily for transmission-line stability. It follows several recent projects with

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SPECIAL REPORT: From congrats to catastrophe…10 days across the grid-scale storage sector

By Jason Makansi, principal, Pearl Street, a Tucson-based consultancy All of us can point to truly memorable events and periods in our careers. A 10-day period that began with a tour and deep dive of Los Angeles Department of Water & Power’s (Ladwp) Beacon storage facility in the Mojave desert and ended with the catastrophic

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Get up to speed fast on grid-scale storage with this no-cost resource

Some veteran gas-turbine (GT) asset managers have already been given responsibility for grid-scale storage facilities. Others may find their asset portfolio shift in this direction soon. If you are in this camp, or if you just want some technical guidance around this new asset class, get a copy of the Advancing Contracting in Energy Storage

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RECAP: CCUG updates users on key elements of the integrated plant

The 2019 conference of the Combined Cycle Users Group (CCUG) was a prime example of “working together,” co-located with the generator (GUG), steam turbine (STUG), and powerplant controls (PPCUG) user organizations. Attendees were invited to participate in sessions conducted by all four groups at the Marriott St. Louis Grand, St. Louis, Mo, August 26-29. On

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Troubleshooting Speedtronic Mark I and II control systems

Overfiring during startup General Electric Speedtronic™ Mark I control systems were installed on gas turbines in the early 1970s, primarily on MS5001N and MS7001B engines. Fig 1 shows a typical Mark I panel being tested using a device known as the Speedtronic Calibrator. Note that the Calibrator has two ribbon connectors patched into designated locations

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Maintenance of your air inlet system critical to assure top gas-turbine performance

Air inlet systems—including filter houses, evaporative coolers, cooling-coil support structure, silencers, ductwork, etc—seldom get the respect they deserve. Properly maintained, they help assure maximum output and high availability of your gas turbines. Yet, they are almost an afterthought at many plants, the focus being primarily on rotating equipment. Annual inspection of the air inlet system

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Ask the experts: How and when to disinfect and sanitize your facility

A recent webinar, posted here, will assist in ensuring environmental health and safety amidst the Covid-19 pandemic are being handled properly and with the utmost attention to detail. Groome Industrial Service Group has been in the industrial and commercial cleaning business for over 50 years and most known for their expertise in specialty cleaning of

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Webinars help users identify, implement solutions critical to plant betterment

If the coronavirus pandemic has taught us one thing, having the ability to access the expert information needed to perform O&M tasks at the highest level without leaving the plant (or home) is vital. With good internet connections generally available at most powerplants, the challenge might be finding the information required. You likely have several

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