Team-CCJ – Page 26 – Combined Cycle Journal

Correcting stator-core looseness in generators for gas and steam turbines

Jamie Clark of AGT Services kicked off the vendor presentations at the 2022 conference of the 7F Users Group, May 23-27, at the Fairmont Dallas Hotel, by addressing stator-core looseness in generators for gas- and steam turbines. Perhaps to jolt the audience awake after breakfast, Clark noted that there’s a “huge uptick” in stator-related problems” […]

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2022 BEST PRACTICES AWARDS: Six plants earn Best of the Best honors in CCJ’s annual Best Practices program

Best Practices / By Team-CCJ

The COMBINED CYCLE Journal and the steering committees of the industry’s leading gas-turbine users groups—including 7F, 501F, 501G, 7EA, 7/9HA, Western Turbine, Frame 6B, 501G, 501D5-D5A, AOG, and V—collaborate to expand the sharing of best practices and lessons learned among owner/operators of large frame and aeroderivative gas turbines. Thirty-five plants listed below participated in the

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Power Users forms Legacy Turbine Users Group (LTUG) for 7E, 6B, and Frame 5 Owners

Best Practices / By Team-CCJ

In the world of power generation there is a significant number of mature frame gas turbines that are the backbone for industrial settings and power generation. There are several well-established user groups that support owner/operators by sharing lessons learned, technical knowledge, and troubleshooting support. It’s critical that these groups maintain a strong presence in the

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Collector brush system upgrade slashes maintenance requirements

7F Users Group / By Team-CCJ

Woodbridge Energy Center Owned by CPV Shore LLC Operated by CAMS 725 MW, gas-fired 2 × 1 7FA.05-powered combined cycle located in Keasbey, NJ Plant manager: Chip Bergeron Challenge. Woodbridge was notified four months before the planned 2020 fall outage that the generator collector brush systems serving its gas and steam turbines soon would be

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Best Practice: Use EMI to assess the condition of generators, transformers, HV electrical gear

Advanced GTs / By Team-CCJ

Challenge. Soon after commissioning, one of Fairview’s gas turbine/generators experienced stator-ground-fault trips attributed to isophase-bus (IPB) water ingression into potential transformer (PT) cabinets, followed by persistent lower-than-expected resistance readings. Doble Engineering was engaged to perform electromagnetic interference (EMI) testing on several components of the plant’s three power trains to assess their condition. Generators, step-up transformers

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HRSG Forum discussion centers on creep damage, elemental zinc in weld HAZ areas

7F Users Group, HRSGs / By Team-CCJ

As usual, a tremendous amount of technical content was offered in two presentations during the HRSG Forum, Jan 28, 2022—No. 7 in a series organized by Chairman Bob Anderson. But the underlying message was more about the state of our industry. A few participants, discussing aging of high-energy piping (HEP), said they were “astonished at

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MD&A webinars focus on inspection, repair, upgrade of retaining rings, turbine valve actuators, fuel-nozzle life extension, plus alarm troubleshooting

7F Users Group / By Team-CCJ

Summaries of MD&A’s spring 2022 webinars on topics of interest to all involved in the operation and maintenance of generating plants powered by gas turbines follow. Both experienced personnel and those new to the industry might benefit from a quick read to identify topics of immediate value and then follow up by listening to recordings

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Thermal performance audit key to extracting more dollars from older plants

7F Users Group / By Team-CCJ

The road to net zero carbon by, well, pick your date, 2030, 2035, 2050, is paved with pledges, promises, mandates, and political rhetoric, but the landscape will most surely be dotted with gas-fired combined cycles making megawatt-hours when the variable renewable resources are not, according to Jeff Schleis, gas-turbine product manager, EthosEnergy. In a recent

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Plant-network, data-link, communications issues revealed during commissioning

7F Users Group / By Team-CCJ

While the industry makes progress towards the fully connected, largely automated powerplant with a meta-organization of onsite staff, remote monitoring and diagnostics (M&D) assistance, and market delivery setpoints, there are some serious and costly gaps that are overlooked in data links and industrial communications. According to Jeff Downen, business owner, Black Start LLC, these gaps

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User presentations: Benefit from your colleagues’ experiences

7EA Users Group / By Team-CCJ

Presentations by owner/operators are highly regarded at user-group meetings. The first-hand experience detailing how a particular job was conducted, what worked/what didn’t, lessons learned, etc, can be invaluable to someone considering a similar project. Plus, there’s the opportunity to ask questions and get straight-forward answers. You should be aware of the six user presentations from

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