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- Conventional Hydro
Hydro Generator Rewind Guide
Lead Companies
CEATI International
Lead Researcher (s)
- #0390
The guide covers the elements for an appropriate stator winding specification and a detailed generic rewind and installation specification is also included. In particular, best manufacturing practices are integrated into the guide.
Technology Application
Conventional Hydro
Research Category
Powerhouse Equipment
Research Sub-Category
Generator
Status
complete
Completion Date
2020
- Conventional Hydro
Hydro Generator Stator Winding Flammability Study
Lead Companies
CEATI International
Lead Researcher (s)
- #0394
The purpose of this investigation was to determine if generator stator windings with Class F insulation would have self-extinguishing behavior.
Technology Application
Conventional Hydro
Research Category
Powerhouse Equipment
Research Sub-Category
Generator
Status
ongoing
Completion Date
Expected 2020
- Conventional Hydro
Hydro Turbine Generator Start/Stop Cost Study
Lead Companies
CEATI International
Lead Researcher (s)
- #0391
This report reviews the literature, studies, and presentations regarding the effects of start/stops on hydroelectric equipment.
Technology Application
Conventional Hydro
Research Category
Powerhouse Equipment
Research Sub-Category
Generator
Status
complete
Completion Date
2020
- Conventional Hydro
Hydro Turbine Generator Vibration and Balancing Field Guide
Lead Companies
CEATI International
Lead Researcher (s)
- #0392
provides a consistent set of definitions for terms commonly used in the design, operation and maintenance of the components and systems used on hydroelectric generator units.
Technology Application
Conventional Hydro
Research Category
Powerhouse Equipment
Research Sub-Category
Generator
Status
complete
Completion Date
2020
- Conventional Hydro
Investigation of the performance and cost benefits of using a magnetically geared generator (MGG) for a hydropower generation.
Lead Companies
University of North Carolina at Charlotte
Lead Researcher (s)
- Kang Li
In this project, a MSMG with a gear ratio of 59:1 has been designed which can achieve a high torque and a high torque density. The magnetic gearbox also has the potential to achieve the MW size after conducting the scaling analysis. the overall performance is competitive with the conventional mechanical gearbox.
Technology Application
Conventional Hydro
Research Category
Powerhouse Equipment
Research Sub-Category
Generator
Status
complete
Completion Date
2018
- Conventional Hydro
Operation of Hydro Generators with Bypassed Stator Coils – Phase 2
Lead Companies
CEATI International
Lead Researcher (s)
- #0379B
This guide will provide recommendations for temporary winding repairs in order to return generator back into operation. The guide will include methods to assess the consequences in the case of the bypassed damaged stator winding coils.
Technology Application
Conventional Hydro
Research Category
Powerhouse Equipment
Research Sub-Category
Generator
Status
ongoing
Completion Date
Expected 2020
- Pumped Storage
PSH Reservoir Lining Study [HydroWIRES]
Lead Companies
ANL
Lead Researcher (s)
- Vladimir Koritarov, koritarov@anl.gov
In response to significant interest from the hydropower industry, this project investigates regulatory challenges and potential research needs related to PSH reservoir liners. The resulting report will cover a literature review and standard industry practices for using polymeric geomembranes as reservoir liners, including examples from the US and worldwide. Metrics related to cost, performance, and regulatory implications will be considered. Technology Application
Pumped Storage
Research Category
Powerhouse Equipment
Research Sub-Category
Generator
Status
ongoing
Completion Date
TBD
- Marine Energy
Resiliency of Poly-Crystaline Diamond Bearings Exposed to Marine Environments
Lead Companies
Pacific Northwest National Laboratory
Lead Researcher (s)
- Robert Jeters
Marine energy efforts are increasingly focused on remote locations where traditional grid-tied systems are not practical. Seals and bearings in marine energy generators are a common source of failures, accounting for up to a 25\% failure rate per year. Polycrystalline diamond (PCD) bearings are composed of one of the most durable substances known to humankind and have been successfully tested in laboratory conditions for marine use. PCD bearings can be used to construct flooded marine energy generators that do not have seals while providing virtually indestructible bearings to reduce maintenance while increasing reliability for marine energy systems. PNNL built a bearing test stand to mimic conditions found in the cross-flow turbines being built by researchers at the Applied Physics Laboratory at University of Washington. We exposed steel and PCD bearings in the bearing test stand to Arctic water temperatures (-2.4°C), fostering ice formation around bearing surfaces while monitoring bearing health for \~1,000 hours. While the steel bearings failed at the 990 hour mark, the PCD bearing show virtually no signs of wear beyond characteristic self-polishing of bearing surfaces. The PCD bearings did not change weight appreciably and while ice formation impacted bearings function while present, the coefficient of friction (CoF) of the bearings was approximately .05 without ice, making these bearings 95\% efficient. PCD bearings present an opportunity for rugged marine power generation in flooded marine energy generators.
Technology Application
Marine Energy
Research Category
Technology
Research Sub-Category
Generator
Status
ongoing
Completion Date
TBD
- Conventional Hydro
The Impacts of Flexible Operation on Hydropower Assets: Generator
Lead Companies
EPRI
Lead Researcher (s)
- Francisco Kuljevan
With the increased penetration of variable renewable energy sources (wind and solar) in the electric grid’s energy mix, a greater need for a more flexible power system is required to maintain grid reliability. Hydropower has been shown to outpace its synchronous and inverter-base generation sources in a relative basis when providing the flexibility needed by the electric grid. Unfortunately, this flexibility comes with a potential decrease in fatigue life caused by the increased cycle activity, which was not accounted for when the assets were originally designed. With the use of electrical calculations, finite element analysis, and fatigue analysis, the study that is the subject of this report calculated the amplification damage factor caused by the flexible operation. The report focuses on two key generator components that have seen accelerated degradation caused by the change of operation patterns, from a baseload to a more flexible strategy.
Technology Application
Conventional Hydro
Research Category
Powerhouse Equipment
Research Sub-Category
Generator
Status
complete
Completion Date
2020
Don’t see your waterpower research?
Have questions about WaRP?
Contact Marla Barnes at: marla@hydro.org