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Title: Evaluation of Electromechanical Systems Dynamically Emulating a Candidate Hydrokinetic Turbine

The use of controllable motor-generator sets to emulate the dynamics of a hydrokinetic turbine is evaluated as an alternative to field testing a prototype. The emulator control dynamic equations are presented, methods for scaling turbine parameters are examined, and experimental results are presented from three electromechanical emulation machines (EEMs) programmed to emulate the same vertical-axis fixed-pitch turbine. Although hardware platforms and control implementations varied, results show that each EEM is successful in emulating the turbine model, thus demonstrating the general feasibility of the approach. However, performance of motor control under torque command, current command or speed command differed. In one of the EEMs evaluated, the power take off controller tracks the maximum power-point of the turbine in response to turbulence. Utilizing realistic inflow conditions and control laws, the emulator dynamic speed response is shown to agree well at low frequencies with numerical simulation but to deviate at high frequencies.
 [1] ;  [2] ;  [3] ;  [3] ;  [4]
  1. Univ. of Washington, Seattle, WA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Tecnalia, Bilbao (Spain)
  4. Univ. College Cork (Ireland)
Publication Date:
Report Number(s):
Journal ID: ISSN 1949-3029; 537822
Grant/Contract Number:
Accepted Manuscript
Journal Name:
IEEE Transactions on Sustainable Energy
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 1949-3029
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
13 HYDRO ENERGY; Energy conversion; Hydrokinetic generator; Motor drives; Renewable energy; Turbine power take-off
OSTI Identifier: