Improved LVRT Capability and Power Smoothening of DFIG Wind Turbine Systems

Title
Improved LVRT Capability and Power Smoothening of DFIG Wind Turbine Systems
Author(s)
누옌탄하이[누옌탄하이]이동춘
Keywords
FED INDUCTION GENERATOR; ENERGY-STORAGE; STATCOM
Issue Date
201107
Publisher
KOREAN INST POWER ELECTRONICS
Citation
JOURNAL OF POWER ELECTRONICS, v.11, no.4, pp.568 - 575
Abstract
This paper proposes an application of energy storage devices (ESD) for low-voltage ride-through (LVRT) capability enhancement and power smoothening of doubly-fed induction generator (DFIG) wind turbine systems. A grid-side converter (GSC) is used to maintain the DC-link voltage. Meanwhile, a machine-side converter (MSC) is used to control the active and reactive powers independently. For grid disturbances, the generator output power can be reduced by increasing the generator speed, resulting in an increased inertial energy of the rotational body. Design and control techniques for the energy storage devices are introduced, which consist of current and power control loops. Also, the output power fluctuation of the generator due to wind speed variations can be smoothened by controlling the ESD. The validity of the proposed method has been verified by PSCAD/EMTDC simulation results for a 2 MW DFIG wind turbine system and by experimental results for a small-scale wind turbine simulator.
URI
http://hdl.handle.net/YU.REPOSITORY/24886
ISSN
1598-2092
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공과대학 > 전기공학과 > Articles
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