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Generator

7FH2 Partial Re-Stack of the Core Step Iron & Full Stator Rewind

Mechanical Dynamics & Analysis performed a 7FH2 Partial Re-Stack of the core step iron & Full Stator Rewind on a GE® 7FH2 generator. Several 7FH2 units have experienced failures of the core step iron, caused by inadequate compression of the core laminations.  This issue was first brought to light by GE® TIL 2260, which only […]

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Generator Stator Bar Abrasion Risk and Prevention

Generator Stator

Mechanical Dynamics & Analysis has analyzed and resolved generator stator bar abrasion events that have become common on some newer GE® Frame 7F and 324, 330, or 390 generators. The damage can cause ground faults leading to forced outages and complete stator rewinds. A principal cause of the abrasion is traceable to side ripple spring-induced […]

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MD&A Completes Significant Combined-Cycle Inspection and Overhaul

Combined-Cycle Inspection and Overhaul

Hermiston Generating Plant For Hermiston Generating Plant in Oregon, Mechanical Dynamics & Analysis (MD&A) completed a complex, multiple-component combined-cycle major inspection and overhaul project that successfully brought both turbines and both generators back to full and reliable operations. The 474 MW combined-cycle plant was depending on the complete and efficient renewal of its Unit 2 […]

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Aging Generator Stators and Field Rewinds Plus Modified Hot Gas Path Inspection

Mechanical Dynamics & Analysis (MD&A), as a full-service provider, was called to a forced outage necessitating two generator stators and field rewinds and a modified hot gas path inspection. The affected units consisted of two GE® Lynn generators that were experiencing both aging and flooding with water due to leaking hydrogen coolers. Prior to this, […]

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Comprehensive Industrial Outage

Comprehensive Industrial Outage

Mechanical Dynamics & Analysis (MD&A) experts recently completed a comprehensive industrial outage for a customer. During the planned major outage, the work scope included inspection and repairs of their industrial steam turbine-generator unit. The major inspection included disassembly, cleaning, inspection, performing recommended actions, and reassembly of the turbine, generator, and auxiliaries. The work scope also […]

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Combined Cycle Overhaul with our One-Stop Shop

Combined Cycle Overhaul

Mechanical Dynamics & Analysis (MD&A) recently completed an overhaul at a combined cycle plant consisting of gas and steam turbine majors, a steam turbine generator minor inspection, and a gas turbine generator major inspection. The customer combined scope was the largest single project implemented at the site since the combined cycle plant was commissioned. MD&A […]

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Generator Stator Rewind

MD&A has a long track record of successful generator stator rewinds on-site. Stator bar aging puts your generator at risk so let our experts with superior workmanship and responsiveness perform your next stator rewind. MD&A uses superior materials to complete the job. You can count on MD&A’s attention to quality! View the video to see […]

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Generator Automated Hydrogen Purge Package

GMCP

In the power generation industry, most large generators are cooled by hydrogen gas. Hydrogen has excellent thermal conductivity properties, but it is also explosive and flammable when mixed even in small amounts with ordinary air.  If a unit will be offline for a while, for example, for a planned maintenance outage, the hydrogen must be […]

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Operating Surveillance

Mechanical Dynamics & Analysis’ (MD&A) experts performed a steam turbine and generator Operating Surveillance for a customer where various issues and leaks were identified for the operating unit. The Operating Surveillance service is typically performed while the unit is online and takes 2-3 days depending on the size and complexity of the unit. These results […]

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