A novel digitalized hydrostatic drive solution for modern wind turbine

Jincheng Chen, Feng Wang, Kim A. Stelson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Gearbox is a concern in modern wind turbines, increasing the maintenance cost and therefore the cost of energy (COE). A hydrostatic transmission (HST) improves the turbine drivetrain reliability by using slightly compressible mineral oil as the working medium rather than a rigid gearbox. An HST eliminates the power converter since it is a continuous variable transmission (CVT), making the turbine simpler and more cost effective. The turbine operates below the rated wind speed for a considerable time in a year, making the variable hydraulic motor run at partial displacement for the most common configuration of a hydrostatic wind turbine, a fixed displacement pump and a variable displacement motor. This results in low drivetrain efficiency. Moreover, large variable displacement motors for megawatt turbine are commercially unavailable. A digitalized hydrostatic drive for a modern wind turbine is proposed to improve the drivetrain efficiency at low wind speeds. The digital coding method for hydrostatic wind turbine is studied. A dynamic simulation model of the digitalized hydrostatic (dHST) wind turbine has been developed in Simulink. A widely used efficiency model for the hydrostatic pump and motors is used in the simulation to make the study practical. The proposed digitalized hydrostatic solution has been compared with a conventional hydrostatic solution. Simulation results show the benefits of digitalized hydrostatic transmission over conventional hydrostatic transmission in drivetrain efficiency, system complexity and cost.

Original languageEnglish (US)
Title of host publicationASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791858332
DOIs
StatePublished - Jan 1 2017
EventASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017 - Sarasota, United States
Duration: Oct 16 2017Oct 19 2017

Publication series

NameASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017

Other

OtherASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017
CountryUnited States
CitySarasota
Period10/16/1710/19/17

Fingerprint Dive into the research topics of 'A novel digitalized hydrostatic drive solution for modern wind turbine'. Together they form a unique fingerprint.

  • Cite this

    Chen, J., Wang, F., & Stelson, K. A. (2017). A novel digitalized hydrostatic drive solution for modern wind turbine. In ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017 (ASME/BATH 2017 Symposium on Fluid Power and Motion Control, FPMC 2017). American Society of Mechanical Engineers. https://doi.org/10.1115/FPMC2017-4352