scholarly journals Research on sub/super‐synchronous oscillation suppression method for direct‐drive wind turbine based on energy compensation

2021 ◽  
Author(s):  
Jing Ma ◽  
Min Zhang ◽  
A. G. Phadke
Keyword(s):  
Wind Turbine ◽  
Direct Drive ◽  
Synchronous Oscillation ◽  
Oscillation Suppression ◽  
Energy Compensation ◽  
Suppression Method

scholarly journals A New Low-Frequency Oscillation Suppression Method Based on EMU On-Board Energy Storage Device

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 22304-22316
Author(s):  
Teng Li ◽  
Yongjun Zhou ◽  
Mingli Wu ◽  
Tingting He
Keyword(s):  
Energy Storage ◽  
Low Frequency ◽  
Storage Device ◽  
Energy Storage Device ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Oscillation Suppression ◽  
Suppression Method

scholarly journals Fabrication of a Scaled MgB2 Racetrack Demonstrator Pole for a 10-MW Direct-Drive Wind Turbine Generator

2018 ◽  
Vol 28 (4) ◽  
pp. 1-5 ◽  
Author(s):  
Niklas Magnusson ◽  
Jan Christian Eliassen ◽  
Asger Bech Abrahamsen ◽  
Svein Magne Helleso ◽  
Magne Runde ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Direct Drive ◽  
Turbine Generator ◽  
Wind Turbine Generator

Fault diagnosis of permanent magnet direct-drive wind turbine converter based on lifting wavelet and random forest

2021 ◽  
Author(s):  
Jing Wang ◽  
Xiaoxia Zheng ◽  
Yuhan Ye ◽  
Shuangmian Yang
Keyword(s):  
Fault Diagnosis ◽  
Random Forest ◽  
Wind Turbine ◽  
Permanent Magnet ◽  
Direct Drive ◽  
Lifting Wavelet

Coupled Electromagnetic and Lattice Structure Optimization for the Rotor and Stator of Large Electric Machines

2021 ◽  
Author(s):  
Austin C. Hayes ◽  
Gregory L. Whiting
Keyword(s):  
Wind Turbine ◽  
Lattice Structure ◽  
Electric Machines ◽  
Force Density ◽  
Direct Drive ◽  
Element Analysis ◽  
Electromagnetic Design ◽  
Turbine Generators ◽  
Wind Turbine Generators ◽  
Structural Mass

Abstract Permanent magnet direct drive (PMDD) electric machines are advantageous due to higher efficiencies and lower maintenance concerns. For wind turbine generators, especially offshore turbines, this is advantageous to geared machines and is currently implemented by manufacturers such as GE, Siemens and Enercon. By nature, a direct drive machine must be larger than its geared counterpart in order to output the same power. As a result, the structural mass is larger and makes the machine prohibitively large. However, the structural mass and electromagnetic design is coupled and the electromagnetic criteria are an important consideration in the structural design. In this analysis, the electromagnetic design of a 5 MW PMDD generator was coupled to a triply periodic minimal surface (TPMS) lattice generator through means of an evolutionary algorithm. Finite element analysis (FEA) was used to determine the radial, torsional, and axial deformations under simulated wind turbine generator loading conditions subject to critical deflection criteria. Lattice functional grading was completed with the FEA deflection data in order to further optimize the structural mass. For the 5 MW test case, functional graded TPMS support structures maintained stiffness for a generator with a 32% higher force density with inactive mass 4% lower than baseline. This study suggests functional grading of TPMS lattice structures for wind turbine generators has the potential at significant mass savings.

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