Title: Wind energy power conversion system reducing gearbox stress and improving power stability

Abstract

A wind energy power conversion system includes a gearbox, a generator, an AC to DC power converter, a DC link, and a DC to AC power converter, and at least one ultracapacitor module connected in parallel on the DC link. A method of reducing stress on a wind turbine gearbox can be performed by obtaining an unwanted frequency of the wind energy power conversion system gearbox; determining an input torque value on the input shaft of the gearbox as a function of time; determining a frequency of the input torque value; and adjusting a torque on the output shaft of the gearbox based on the unwanted frequency.

Inventors:

Nasiri, Adel

Issue Date:

2014-10-14

Research Org.:

UWM Research Foundation, Inc., Milwaukee, WI (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1532130

Patent Number(s):

8860236

Application Number:

12/907,651

Assignee:

UWM Research Foundation, Inc. (Milwaukee, WI)

Patent Classifications (CPCs):

F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03D - WIND MOTORS

F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05B - INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY

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F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03D - WIND MOTORS

F03D7/0272 - {by measures acting on the electrical generator
F03D7/044 - {with PID control}
F03D7/046 - {with learning or adaptive control, e.g. self-tuning, fuzzy logic or neural network}

F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05B - INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY

F05B2260/96 - Preventing, counteracting or reducing vibration or noise
F05B2270/309 - Rate of change of parameters
F05B2270/327 - Rotor or generator speeds

H - ELECTRICITY H02 - GENERATION H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS

H02P2101/15 - for wind-driven turbines
H02P9/04 - Control effected upon non-electric prime mover and dependent upon electric output value of the generator

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E10/72 - Wind turbines with rotation axis in wind direction

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DOE Contract Number:  

EE0001386

Resource Type:

Patent

Resource Relation:

Patent File Date: 2010-10-19

Country of Publication:

United States

Language:

English