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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Linda Sartika, Atsushi Umemura, Rion Takahashi and Junji Tamura
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DOI:10.17265/2159-5275/2017.04.001
Affiliation(s)
ABSTRACT
Protection system for DC-link circuit of back-to-back converter of PMSG (Permanent Magnet Synchronous Generator) based wind turbine is essential part for the system to ride through a network fault in grid system. Voltage on the DC-link circuit can be increased significantly due to power unbalance between stator side converter and grid side converter. Increase of DC-link circuit voltage can lead to a damage of IGBT of the converter and control system failure. In this paper performance enhancement of DC-link protection of PMSG based wind turbine by using new control system of buck converter is proposed. The buck converter is used to control supplied voltage of a breaking resistor to dissipate energy from the wind generator during network disturbance. In order to investigate effectiveness of the proposed DC-link protection system, fault analysis is performed in the simulation study by using PSCAD/EMTDC software program. In addition, comparative analysis between the proposed protection system and the conventional protection system using DC chopper is also performed.
KEYWORDS
Wind farm, variable speed wind turbine, permanent magnet synchronous generator, buck controller.
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