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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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New Generator Stator Replacement

MD&A recently performed a Stator Replacement, removing the old stator off the foundation and replacing it with a brand new Stator. The generator stator traveled by large vessel overseas, then by railcar to the site. In addition, the project included a full test and inspection on field, where MD&A experts rewound, applied a blocking modification, […]

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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 Replacement

MD&A recently performed a 7FH2 Generator Stator Replacement, removing the old stator off the foundation and replacing it with a brand new OEM 7FH2 Stator supplied through MD&A. The generator stator traveled by barge from Virginia to New York. In addition, the project included a full test and inspect on the 7FH2 field, where MD&A […]

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Power Plant Generator Services, Repairs & Parts

At Mechanical Dynamics & Analysis (MD&A), we specialize in providing top-notch Power Plant Generator services to power generation plants worldwide. We understand the importance of keeping power plants running smoothly and efficiently, which is why we offer on-schedule assistance and high-quality, cost-effective parts, repairs, and services. Our full-service, OEM-alternative offers products for steam turbines, gas […]

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MD&A Air Gap-Bot Generator Robotic Inspection

MD&A’s Air Gap-Bot, our generator in-situ inspection robot, can perform full generator inspections without removing the field, saving time on the outage! We can provide time and location-stamped high-definition video and still images. The MD&A Air Gap-Bot can perform a visual inspection, a stator wedge tightness assessment, and an Electromagnetic Core Imperfection Detection (ELCID) in […]

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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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