Hydroelectric Generator Repair Services

When an issue arises with your hydroelectric generator, it is important to complete repairs as soon as possible. Left untreated, problems will grow, leading to costly repairs, downtime, and even safety hazards. When your equipment is maintained and inspected regularly, you can identify potential problems before they happen, thereby reducing the cost of repairs and the risk of damage to other parts of your system.

Common Hydroelectric Generator Repairs

Hydroelectric generator repairs usually fall into two categories: rewinding and mechanical repairs.

Rewinding
With normal operation, the windings in a hydroelectric generator will deteriorate over time due to thermal aging of the insulation system. When rewinding the stator of a hydroelectric generator it is often possible to increase the copper cross sectional area of the conductors. In this case, the copper losses of the windings are reduced and thereby the overall efficiency of the generator is enhanced.

Mechanical Issues
The most common mechanical issues in hydroelectric generators relate to alignment and balance. Loose bearings, broken fasteners, and damaged welds and rotors can all create unwanted vibration and pressure on components within the generator. This increases the wear on components and can significantly decrease their service life. Spectrum and vibration analysis can help to detect unwanted vibration and pinpoint the cause, so you can conduct repairs before they cause damage to other parts of the generator.

Other mechanical repairs that are common in hydroelectric generators include:

• Slip ring, bearing, and flange replacement and repair
• Bush rigging replacement
• Exciter repair
• Hydro Shaft machining
• Flange face recutting and brake ring machining
• Stator and rotor cleaning

Our capabilities within the hydroelectric industry include the following services:

• Generator Rebuilding and Rewinding
  We know that reliable generator operation is crucial to hydroelectric operations. Our extensive expertise allows us to provide rewinding and rebuilding services for any brand of generator, both in-house and on-site. Using computer-controlled stripping and winding and custom coil capabilities, our experts can quickly return your generators to their original OEM condition.
• Gearbox Rebuild & Repair
  Renown Electric works with companies of all sizes to repair and rebuild gearboxes in a variety of generator and motor designs. We know the risks posed by poor gearbox alignment, vibration, heat generation, and out-of-spec fits, which is why we work to ensure that your gearbox is operating smoothly and efficiently at all times.
• On-Site Repair
  Some generators must be repaired on-site. We work closely with our customers to conduct vibration analysis, balancing, laser alignment, and maintenance management programs that ensure that your hydroelectric generator is operating efficiently. Our on-site repairs are conducted quickly by skillful technicians with no need for assistance from outside vendors.
• Preventative and Predictive Maintenance
  Renown Electric is committed to ensuring that our customers receive quality preventative and predictive maintenance to keep their equipment operating reliably at all times. With maintenance services such as vibration and winding analysis, we can help you avoid expensive repairs, costly downtime, and unnecessary equipment replacements.